Green Industry is producing environment friendly products or products which should help improve nature conditions to better. And also during working process cause minimal damage to environment. Green industry ought recycling waste of working process (cutting) and recycling waste energy (heat). Green industry ought to reach wasteless working process. The green industry is focused on eliminating or significantly reducing dependence on oil, green house emissions, and toxins. With the more and more serious environment issues, green industry has become the top industry. It applies in all industry, mining machinery industry, chemical industry, road construction, agriculture and so on.

Gold mining is one of the great mining industry. Nowadays, gold mining industry goes into green industry.

Mining for gold has traditionally been viewed as a toxic business that harms the environment leaving mercury and other harsh chemicals in the atmosphere. However, this view is beginning to change as gold mining practices turn to fair trade. The new fair trade standards set social, environmental, and economic measures to eliminate child labor and minimize the use of toxic chemicals such as mercury and cyanide. The major goal of this movement is to avoid the negative impacts that mining causes in the environment while also aiming to help the millions of people who depend on the gold mining industry for employment.

Many companies are already beginning to produce under the fair trade standard promising customers that their gold products are ethically sourced and produced with no mercury or cyanide. Training miners to become more environmentally responsible has been a key objective for fair trade companies that hope to create more sustainable business practices. After all, extending the useful life of a gold mine is not only advantageous to the environment but also to the business itself. Many fair trade gold businesses in South America are going a step further by increasing the salaries of their workers, almost doubling the previous average pay. This will dramatically help the workers and their families who depend greatly on the gold mining industry.

As of now, fair trade gold is being produced in only four countries—Bolivia, Colombia, Ecuador, and Peru. Other countries in South America have yet to join the fair trade gold movement including Venezuela who recently nationalized their gold industry. That may change within the next two years as mines in Latin America, Asia, and Africa are set to join the fair trade standard. A growing number of retailers will also join the movement by beginning to sell their gold jewelry under the fair trade label.

Turning the gold mining industry into a clean, environmentally friendly practice will not happen overnight as only 15 percent of the global gold supply is produced under fair trade. Right now, fair trade only covers small-scale mining projects and has limited impact on the world’s gold supply. New business practices need to start somewhere and the fair trade mining practice has begun nevertheless.

18-11-2011 om 06:48 geschreven door annazhao356  

The world of mining has more than seven thousand producing mines around the globe and every year we can find that there are more quickly progressing and being developed. These mines give us the raw materials needed for the construction, manufacturing and industries of chemicals and the majority of the minerals of energy upon which our everyday life is so needed of. So, it's first and important to grasp the ways to select the mining machinery equipment.

Bringing the hoist to a controlled, smooth stop after a total power failure is the most important brake function. This has not been a problem for drum hoists at depths to approximately 3000 feet, nor is it a problem with Koepe hoists where the system is either in balance when empty or maximum out of balance when loaded. On a double drum hoist at depths below 3000 feet, however, the rope weight and conveyance, whether loaded or empty, can create such a wide variance of braking requirements that a more sophisticated brake control is required.

Here is a guide to calculate how to size a mine hoist while you know the desired capacity (TPH) and depth for vertical shaft. The main problem in selecting a hoist for a given capacity and depth is deciding on the proper skip load (payload). A larger load hoisted at slower speeds requires less horsepower, but at the expense of increased rope diameter which, in turn, increases the drum diameter, gearing, etc. In selecting a skip size, therefore, it is helpful to know the relationship between skip load, speed, and capacity for the given depth.

The cost of the headframe, skips, loading pockets and ropes enters into the economics when selecting skip loads, but these cost changes are relatively small. (Skip sizes can be varied within limits without changing the shaft selection.) We are not attempting to make an economic comparison between drum and Koepe schemes in this manual – to select one over the other involves a complex study which should include the complete hoisting plants. If your skip weight factor is known, use it rather than 0.75. To determine proper friction hoist skip weight.

There are several emergency braking arrangements available: varying braking pressure with depth and/or hoisting direction; firing off a sequence of valves applying braking as needed according to a feedback rate; setting the brake rapidly until the feedback system dictates that rate must be held until stopping.Should the actual speed of the conveyance be greater than required by the reference signal, the governor applies the brake in proportion to the difference in signals. If the actual conveyance speed is less than the preset reference signal, the governor releases the brake.

18-11-2011 om 06:48 geschreven door annazhao356  

Grinding mills are very important in mining industry. Through the mills, we can get proper and wanted kinds of powders. Of course, if you'd like to make the final products more accurate, the effective diameter of a grinding mill is the key.

The effective diameter of a grinding mill is the diameter inside lining; i.e., the net diameter. In this case, the mill under consideration is a new installation so liners will be roughly 3” thick and the net diameter will be 6” less than the diameter inside the shell. Since no diameter has been specified, investigate a range to find the most suitable. From the table the values of A are:

For a net diameter of 10’6” (3200mm) ..................................... A = 63.5

For a net diameter of 11’6” (3205mm) ..................................... A = 79.3

For a net diameter of 12’6” (3810mm) ..................................... A = 97.5

For a net diameter of 13’6” (4114mm) ..................................... A = 118.5

Step 3: Most overflow discharge mills operate with 35 to 45 percent charge. An average value is 40%. The value of B from the table for a wet overflow mill at 40% is as follows: b = 5.02

Step 4: Speed was not specified, so a range of speeds should be investigated to find the most suitable. From the table the values of C are as follows:

For 68% of critical speed ........... C = 0.1583

For 72% of critical speed ........... C = 0.1724

For 76% of critical speed ........... C = 0.1878

Step 5: Solving for the length of the mill with 02’6” net diameter, 40% charge and 68% of critical speed required to draw 1400 HP:

L = 1400 = 27.7 ft.

63.5 x 5.02 x .1583

There are Raymond mill, verticle mill, overflow ball mill, rod mill etc.

18-11-2011 om 06:48 geschreven door annazhao356  

In physics, the charge of a volume is commonly described by a quantity called the charge density or the charge distribution. When the electric field that arises from the charge distribution exhibits a volumetric symmetry, a handy relationship known as Gauss's Law may be used to calculate the charge distribution of the volume.

The charge volume of a ball or rod mill is expressed as the percentage of the volume within the liners filled with balls or rods. When the mill is stationary, the charge volume can be quickly obtained by measuring the diameter inside the liners and the distance from the top of the mill inside the liners to the top of the charge. The percentage loading or change volume can then be read off the graph in Figure 3 or can be approximated from the following equation:

% loading = 113 – 126 H/ D

where H is distance from top of mill inside of lining to top of charge and D is diameter of mill.

Maximum power is drawn by a mill when the charge occupies approximately 50% by volume. However, as seen in Figure 4, the power curve becomes very flat in the range above 45%. As a result, mills are seldom run with charge levels greater than 45%.

In rod mills, the charge is swollen by particles of feed which separate the rods. If the mill is shut down immediately after the feed is shut off, the charge level will be greater than if the mill had been “ground out” prior to shutdown. Because of this, rod mills are normally operated with a 32 to 40 percent charge by volume. In operation, this becomes a 40 to 50 percent charge, with a bulk density considerably lower than that of stacked rods.

Ball mill charge becomes measurably swollen only when there is a buildup of large unground material in the ball mill or when the density of the pulp in a wet mill is extremely high. Although these conditions are seldom encountered, it is recommended that ball mills be ground out prior to shutdown for measurement of the charge level.

18-11-2011 om 06:47 geschreven door annazhao356  

It is known that, crushers are used in various industry, such as chemicals, metallergy, coal mine, gold and road construction. And also they can serve for water conservancy. Between them, the relationship of 'mutual benefits' exists.

For recnet years, there are many positive reports on water conservancy development. Water Resources budget implementation progress will accelerate in the second half, especially for infrastructure projects will be the focus. Industry sources believe that by tightening the impact of the first half of capital investment is not in place affecting the water, in the second half of these issues will be resolved, large-scale water conservancy construction investment projects will be started.

Experience with conventional, hydraulic sand and gravel aggregate demand is very large, pre-production and living facilities projects, including infrastructure and construction of road construction, and later the hub construction of the main building, we need a lot of sand and gravel aggregate supply. Sand and gravel aggregate industry will undoubtedly continue to benefit. Only strict customs, in order to cast the qualified projects. Large-scale water production capacity of the equipment requirements and other conditions are very harsh, and the gravel field production equipment, crusher selection will directly affect product quality.

Learned that the water conservancy construction equipment tender, clearly defined, engaged in sand and gravel production line configured more than 3 years and 3 years, with construction of the Nissan production capacity of 1000-10000 tons of sand and gravel aggregate companies to bid.

Since ancient times, water conservancy construction is the protection of national stability, along with the motor car derailment, House crunchy, the collapse of the bridge collapse and a series of shabby appearance, quality of infrastructure has been put on the agenda, especially in water conservancy construction, gravel bone material is the high demands, high-quality sand and gravel aggregate processing must use high-quality crusher, sand making equipment, which relates to the use of project quality and project results, but also a high degree of responsibility for people’s property.

Water conservancy project started to drive the development of major industrial sand and gravel aggregate, sand and gravel aggregate industry is not only an beneficiary in the development,crusher enterprises also benefit from the water conservancy project especially famous crusher manufacturers, but adequate companies want a slice, it depends on the strength!

14-11-2011 om 03:47 geschreven door annazhao356  

Crusher are used as the common and usual equipment in mining industry, and certainly there are many problems when runnig. The crushers will suddenly work when the phenomenon of blockage, then the crusher block, how to deal with the problem? Hongxing will give your some tips.

Firstly, crusher block is the continuous use of the common faults that may exist in the design of the organism itself, but more are caused by the use of improper operation.

Secondly, feed too fast, the load increases, is caused by blockage of one of the reasons. So we use the crusher must pay attention to the feeding process, the meter pointer deflection angle should always pay attention to big problems, if more than the rated current, indicating that the motor overload, overload a long time, it will burn out the motor. This happens immediately reduce or close the door material, can also change the way feed, by increasing the feed to control the fluxes. Feeders with manual and automatic, the user should choose the right according to the actual feeder.

Users should always pay attention to the relevant operation of crusher, which would accordingly reduce the clogging phenomenon crusher．

14-11-2011 om 03:37 geschreven door annazhao356  

Any industry, any equipment is anticipating high efficiency and low cost, especially for expensive construction machinery industry. The enterprise profits are anticipated more and more. Construction machinery industry is not only important to promote the people's livelihood relies on the construction, but also the achievement of the industry, rapid development of effective protection, so the development of construction machinery industry is also a priority in the other. That is why the 'high efficiency' has become the measure an important indicator of construction machinery products, but now, construction machinery, 'efficiency' is still up in the high-energy-based implementation, which also led to our construction also in large amounts of energy, manufacturing a wide range of pollution. How to reach both efficiency and energy-saving in construction machinery industry, which should be taken into consideration.

Construction machinery industry is a combination of technology, capital and labor, in recent years as China's construction machinery industry, the increasing size of the market expansion and our continued efforts to strengthen infrastructure, economic market segments made higher requirements, including not only technical, intelligence, including energy saving, environmental protection and other factors. Nowadays, energy saving has become a hot topic in our society, it seems to be no energy saving construction machinery industry is also related to development of the market to catch the express train, the urgent need to efficiency, energy saving, green, environmentally friendly direction of transformation. Many energy saving concept has also been applied to construction machinery products, such as 2009, in the country for the first time introduced the concept of hybrid energy-saving machinery to study, and developed a new type of China's first jaw crusher, crushing than the traditional machine 30% energy efficiency by 25%. It also confirmed the construction machinery enterprises are moving toward the goal of energy saving efforts.

After 50 years’ development, China construction machinery industry forms an important industry which produces products of 18 categories, more than 4500 specifications and types, and meets the basic demand in domestic market and has quite a scale and flourishing development vitality. Although there are some performances, but still in its infancy. China's construction machinery industry is currently facing energy conversion efficiency is low, the operation is backward, and serious environmental pollution problems, which gives the energy saving industry has posed a serious challenge. At present, China's primary energy consumption has more than 3.2 billion tons of standard coal, crude oil dependence on foreign imports to reach 55%. Oil consumption is the main area of ​​petrochemicals, transportation and engineering machinery. Construction machinery, especially the broken machinery industry, oil consumption is an important aspect can not be ignored.

But compared with foreign competitors, China construction machinery enterprises still have some problems as follows, they are: big gap of control technology; corresponding parts( spare parts, components) non-reaching standard; insufficient consideration of man-machine engineering; less research and development input. It is the key for construction machinery industry to adjusting the product structure in the development process.

In addition, we also take into account environmental issues, the traditional engineering machinery products have been far from meeting the requirements of air quality at this stage, to long-term sustainable development, and only continuous technological upgrading and innovation that the future of construction machinery essential factor is the environmental protection industry. In addition, competition in the international market which is not often due to emissions standards, exports have been seriously hampered. From this green energy has become China's construction machinery industry, the problem can not be ignored. But we also see in the domestic construction machinery enterprises are active in-depth study of a new generation of energy saving, environmental protection equipment, more and more construction machinery manufacturers have focused mostly on 'energy-saving''intelligent' two key word.

Demand and growth rate of construction machinery products have close relation with GDP and investment scale of infrastructure construction, industry boom situation is related to the growth rate of investment in fixed assets with synchronized positive correlation. During the '10th Five Years', consumption amount of China construction machinery occupied 1.9% of the whole social fixed asset averagely per annum. The growth rate of fixed assets investment will slow down during the '11th Five Years', market capacity will expand relatively insufficiently, and the industry will develop toward rationality gradually.

14-11-2011 om 03:15 geschreven door annazhao356  

Mineral resources is the most important foundation our country's economic construction and social development, it has vital position in the national economy and security. At the same time, any resource maybe use out. Todays, energy and resource expolitaion is the serious issue to talk about.

In case the supply of mineral resources disruptions, it will pose a serious threat on economic, social and national security. However since the 1990s, many mineral resources consumption growth has approximated or exceed the national economic development speed. The economic growth made a large demand of mineral resources. A resource analysis data recently shows, in 2010 ,mineral oil, gas, aluminum and iron, copper, gold, nickel, sulfur, boron, uranium, phosphorus, potassium, chromium, asbestos are unable to satisfy domestic demand, by the year 2020, The shortage of China mineral resources will be increased to 39 kinds.

Analysts say that in the coming decades, with Chinese industrialization and economic globalization, China will become the world's most important mineral resources consumption country. In the coming decades, comparing with main mineral demand in our country at present, the main mineral reserves will appear serious shortage. And mineral resources in Chinese economic and social security is decline, the paradox of resource bottleneck of contradiction is becoming more and more serious. To implement the strategy of 'going out' is dispensable, we should make full use of both domestic and international markets, to satisfy domestic economic development needs.

No modernized countries in the world can make all mineral resources and raw materials self-sufficient. In recent years, China's oil, iron ore, copper metal importing dependence are becoming more and more serious, particularly oil and iron ore. Long-term excessive dependence on imported is both economic problems and national security concerns. For the long-term development, only based on the resource security, the national security is guaranteed. Implementing the strategy of 'going out' will extend more space and wider range of areas and at a higher level participating in international economic and technological cooperation and competition domestic and abroad. Make full use of two kinds of resources, two 'markets', build all-round, mineral resources and sustainable supply system and improve mineral resources sustainable development of national economy is the issue we should concern.

We Henan Hongxing Machinery are the famous manufacturer of mining machinery equipment in China and have been titled 'China famous machinery brand'. We have passed through ISO9001:2000. Our always focus on technology innovations, product design, development, production, installation and maintenance. At any time, clients are always the first.

14-11-2011 om 03:06 geschreven door annazhao356  

For ore dressing process, there are two ways: flotation process, magnetic process. Magnetic separator is used in magnetic procell. It applies to wet magnetic separation of materials below 3mm such as the magnetite, pyrrhonitite, roasted ore, limonite，ilmenite. Also used for coal, non-metallic minerals, building materials' remove working.

Magnetic line of the magnetic separator uses high quality ferrite materials or compound with rare-earth magnet, the average magnetic induction is 100～600 MT, we can provide downstream, semi-current, counter-current, a number of different forms magnetic separator according to the users' need. You can use them in industries like mining, and smaller versions are widely-used in scientific labs to process some kinds of samples. Numerous companies make magnetic separators for assorted applications, there are some variations intended for website visitors to select from,jaw crusher, according to the application and needs. This sort of products are which is available from companies which are experts in industrial processing equipment, therefore it may be ordered completely from manufacturers, where individuals have customized needs.

An elementary magnetic separator is made up of magnet of some sort. As materials are passed below, over, through, or round the magnetic separator, it attracts undesirable impurities, pulling them out and cleansing the process stream. Magnetic separators might be ferromagnetic or paramagnetic, according to the needs, and in many cases materials will likely be passed through both varieties of magnetic separators. They may differ in proportions from tabletop separators found in labs to massive drums found in recycling facilities.

One of several common uses of a magnetic separator will be the eliminating so-called tramp metal,Magnetic Separator, undesirable iron that may foul a procedure stream. Magnetic separators may also be employed to remove materials which may damage or foul equipment, inside a pre-processing step. Separators may also be used to sort various metal, using a group of separators varying in intensity to get out strongly and weakly magnetic materials at different times.

Like other devices used in processing materials, a magnetic separator must be properly maintained and operated as directed in order to be effective. Maintenance includes clearing the separator to remove magnetic materials it has collected, along with periodically oiling moving parts. In the case of electromagnets, it is also necessary to make sure that emergency shutoffs and other safety features are in operational condition, so that the magnet can be turned off in the event that a problem develops on the production line.

14-11-2011 om 03:02 geschreven door annazhao356  

As we know, corporate events are everywhere and important for an enterprise. In the occasion, there are more business parters and corporation chances to help the enterprise. Managing corporate events takes skills and dedication, their concepts and corporate event planning will take your business to the next level whether its a elite corporate event, a seminar or conferences to get the word out there and promote your company, an expert planner can help you. Any type of gathering needs a great deal of planning and prior arrangements which will result in effective management and profitable performances. With the advancements of new ways and techniques, the demand for beautiful and modern functions has been in high demands. This is feasible only with the help of the best corporate event management company.

From many years event management company play a significant role when it comes to creating breathtaking and meticulously well organized events for their clients and guests to enjoy and make a great and long lasting impression among the co-workers and the attendees. This is why; organizing corporate events is very much sought after by many companies in a more professional way. With the help of an efficient team of planners and qualified staff available to service you, delivering corporate events that leave you breathless with a fresh new look and feel enabling you gain immense popularity as well as profitability with a successful event.

Below we will get to know the various uses and services of a corporate event management company and understand the importance of hiring one of the best luxuryevent planners to conduct your corporate functions. Here are the lists of some of the many services offered by a bespoke event management company:

A luxury event planner makes every and any kind of arrangements for your event and make sure that nothing is left untouched which should be managed, the last moment details will be looked after rather rushed at the peak hour.

They are highly qualified professional and that is why they take care of every requirement needed in an event with such class and ease.

With the help of efficient management team members, these planners bring effective solution to your every problem with their bespoke services approach.

Right from the decorations, venues, to catering or the invitations they can manage everything without any delay.

Being experts they do not need much time to make the proper arrangements and planning decisions, it is recommended to call then well in advance to avoid missing out on some subjects that might require more time, regardless you can be relaxed from day one to the end with their help, be assured that they will take care of everything for you.

For any event the theme is one of the most important aspects to consider when planning, inform your luxury event planners as much as you can to get exactly what you envisioned. With their dedicated team of planners they will take care of every theme details for your event, the decoration, catering, menu's, music or any specially requested services, everything will flow nicely with the theme and you'll be able to see your vision come to life.

Corporate events are essential activities in business circle. Do you worry about them? Do you want to make the corporate events helpful to your company? I think that the paper will benefit you to a great extent. The right ways you choose to attend to one corporate event can surely make your performance and business better and more effective.

14-11-2011 om 02:58 geschreven door annazhao356  

There are many disasters and risks for recent years, such as earthquake, waterlog, drought, war. Along with these, global economy has in great fluctuation. Of course, one coin has two sides. There are disadvantages and advantages brought. As a result of the financial crisis, many enterprises are facing domestic and international operations, the dual crisis of survival. It also directly contributes to China's mining machinery industry, competition, and if the rest on its laurels, inert, business, living a double crisis of the event so difficult mining machinery industry. How to talent in this competition, to achieve a breakthrough? Accelerate scientific and technological innovation is the unquestionable choice.

A) Infrastructure development has brought opportunities for the mining machine

The use of mining machinery and basic facilities in areas of interest-rate coherent future, there will be a great market. Moreover, the financial crisis, China adopted a series of stimulating domestic demand and ensure a stable and rapid economic development policies and approaches, in which the State Department recently dropped into 4 trillion, 'increased security' approach, pulling the premises to the Government's new round of investment enthusiasm, ' livelihood projects 'to become the number one investment priority.

Government investment plans in the premises, the focus is still railways, highways, power plants, real estate and other infrastructure projects, which are in China mining machinery industry with close contact. This is our country's supply of mining machinery industry to develop new opportunities, but also put forward a higher request, require mining machinery industry to speed up scientific and technological innovation, progress, science and technology content, in order to compete for the future skill areas with more open markets.

B) Low-tech, impeding the pace of development of the industry

China's mining machinery in general and the international advanced level to be out of date compared to 15 to 20 years, the majority of product techniques the origin of the last century since the mid-80s imported from abroad. The domestic market, mining machinery products in the market occupation rate is less than 80%, at the entrance of the products are mostly large, precise, sharp and complete sets of very strong products, such as Shearer, large and efficient equipment, respectively, crushing and grinding equipment, full - cross-section with boring machine and other products.

Mining machinery industry, the basic technology is not strong, reform and opening up, mining machinery areas has been progress in the market for technology products as the skill level of the major roads. Looking around the world mechanical design of the development process, important thing is to stand-alone product design to the stand-alone product design process and then to complete sets of equipment designed for evolutionary process. China's general mining machinery manufacturing just completed a stand-alone product design and manufacturing, device applications, process flow design done by a professional institute, stand-alone product nature of the request process are also made by a professional design institutes and to assist in the completion of manufacturing, which resulted in equipment fabrication plant and equipment, the gap between application part. Thus, in the current mining machinery production sectors and enterprises designed to process the case of relatively thin, except in their own areas of expertise as soon as conditions are good, organized effort to enter into the role, should be used with foreign companies and national professional institute to establish a different situation combined, including the formation of groups, the Commonwealth, the introduction of technology, the introduction of qualified personnel and other measures, at least in a fight to the project on the use of integrated design approach, first to participate and then progress, and achieve win-win situation, and similar enterprises in most of the consequences of recklessly tender bad.

C) Network on the impact of mining machinery business

90 years since the 20th century, the emergence of governance in the developed country wave of change that swept a new era of industrial revolution, this is a network of economic globalization and the information tag into the Industrial Revolution, it poses an unprecedented impact on the original production methods, changes in the original business model. Enterprises to adapt to this change in the networked environment to operate governance has become the irresistible trend of the revolution, the traditional enterprise network to meet this in-depth treatment, the turn facing a new opportunity and provocation. Traditional enterprise networks have a significant impact, special is a mining machinery business, the network can not be compared with other traditional methods peculiar upper hand, China Mining Machinery Network (www.ccdrc.cn) for the supply of mining machinery business services.

However, the future of mining machinery industry will present two important strategic groups: the supply of full range of products and services, generalist-based businesses and product or market segment expert-oriented enterprises. At present, the domestic leading enterprises and transnational corporations is also comparable to the strength compared to the weak, while those who concentrate on the market in some products and the formation of core competitiveness, and to gross profit of the expert-oriented enterprises are more likely to survive in the fierce competition down. In the mining machinery industry, the new competition format, a considerable number of domestic enterprises will be the multinational production and marketing system in a link, and a small number of products and services with the core competitiveness of enterprises will likely become a confrontation with transnational corporations outstanding.

Consequently, at the new time, the future and scope of China mining machinery industry are both bright. The machinery enterprises should improve the product technologies, intensify network marketing, and promote enterprises competence and services. Todays, consumers maybe take less consideration on products price, but take more on product services and product brand. Totally, comprehensive development of an enterprise can take the advanced rank in the world.

14-11-2011 om 02:54 geschreven door annazhao356  

As we learn, miners continue to die in accidents in China, Russia, America, and elsewhere. As we learn, academics and corporate apologists generate technical papers on management by a risk-based approach. We'd like to ask that: Will or won't it go bankrupt paying for the cleanup?

The phrase 'safety is built from the ground up' may seem like a cliche. But a group of mining companies is taking the message to heart with a concerted campaign to work with original equipment manufacturers (OEMs) to ensure that safety is incorporated into the design of mining equipment. The group meet with OEMs on a regular basis, typically once a year, bfinging forward recommendations for design changes to equipment in order to improve sagety. While the initial focus was on surface mining equipment, EMESRT has expanded into three other equipment areas - exploration drilling, underground hard rock, and underground coal and soft rock.

Safety risk exists along with enterprise's loss. In another word, once one mining company disaster is reported, its fame, enterprise image and finance all face the risks. In addition to this aspect, there is another risks. Thus, mining enterprise has to learn how to live with these risks. “You cannotafford to do it all, so take the risk and get the probabilities right.”

All too often these prophets of probability prevail. And equally often their statistics are proven right: something fails and somebody in the mine dies. Or worse, they are proven wrong; and something fails, and many people at the mine die. A committed mining statistician will tell you: “There is no suchthing as a risk- free world. Thus we must incorporate risk, probability, and consequence in our real-world view, analyses, and decisions. After all, we will all die sometime, the tailings will flow to the ocean eventually, and the pit will become a part of the topography.”

The fascinating thing to contemplate in the light of coal mine deaths, tailings dam failures, and oil rig blowouts, is this: What, if anything, do these recent, admittedly spectacular events, mean to other mining projects? One blogger recently asked: Can the Alaska Pebble Mine survive BP? In other words, how can one defend probability in building 700-ft high slimes dams above the salmon hatchery? In the enormity of time, any probability offailure, no matter how small, will come to pass and those baby salmon are toast.

In search of a risk-free world, in deference to the near-demise of BP, and in recognition that extreme statistics do play out, are we headed to a new mining world; one where only reasonable projects involving rich ore bodies in dry, non-seismic parts of the world proceed? Are we headed to a more conservativeperspective where the old mining risk profiles are no longer acceptable? Is mining going to be stung by the BP oil spill to avoid projects, to do better project engineering, and to try to make living near andworking on a mine as safe as commercial flight? Funny how we accept that commercial airlines shouldbe safe, but happily accept far less in a coal mine, in a slimes dam, and on an oil rig.

14-11-2011 om 02:50 geschreven door annazhao356  

Open-pit mining follows the same sequence of operations as underground mining: drilling, blasting, and loading and removing waste and ore. Open-pit mining follows the same sequence of oprations as underground mining: drilling, blasting, and loading and removing waste and ore. Opencast mining is highly mechanized technological process which, due to low manpower, high production outputs and engagement of heavy-duty mining mechanization requires a very high consumption of power, spares and materials. Those facts indicate that rationalization of the consumption of power and materials requires specific attention in scientific senses.

General prognosis that deals with the development of surface exploitation of coal in Yugoslavia, along with ecological issues also covers large energy and materials consumption in this field as a strong limiting factor. Such estimation is based on the ever increasing requirements for energy. spare parts and various materials that in surface exploitation of coal are growing with increase of the physical volume of production. The complex analysis of the factors influencing consumption of energy and materials in the surface exploitation recognizes three groups of main factors such as natural. technological and organizational.

The group of natural factors covers separation of deposits, relief of terrain, coefficient of overburden, physic-mechanical properties of the deposit, depth of mining, mineral materials quality and length of transportation roads. Technological factors include structural equipment design, project designs. installed power, method of excavation, loading and transportation, method of piling, development of excavated faces, useful value of mined materials and mineral processing. Quality mineral materials and the length of transportation roads can also be listed among the technological factors. The organizational factors are represented by: managing of process, qualification of stuff, maintenance of mechanization and monitoring the energy as well as material consumption. Certain open pit mines initiate the study of a series of mutually interlinked issues concerning technology, efficiency and organization of production, thus overpassing the accepted principle that the planning standards are only based on the previously achieved consumption standards. Defining the modem methods of monitoring energy and material consumption might be considered as the general scientific-research direction in surface exploitation for the purpose of decrease in overall costs and better productivity.

Transportation of overburden, within the limits of the open pit surface itself. to internal waste dump and crushing equipment is carried out by dumper capacity from 50 to 70 t, and volume of loading frame from 30 to 50 m3. Transportation of overburden to the external deposit is carried out by belts with previous crushing of material by crushers. At the present stage of exploitation, six transporters were installed, three of which being permanent and three mobile, in a total length of around 4500 m. The said transportation system also consists of below-level dump stackers and above- level dump stackers having the capacity adjusted to transporters. Coal transportation from open pit mine to crushing and separation plant is also performed by dumpers capacity of 36 t, volume frame of 26 m’. In this plant classification of coal is made depending on its market purpose.

While monitoring electric power consumption the data used refer to periodical control of such energy consumption and a comparison with the planned quantities was accordingly made, having in most cases quite a negative effect, as the adequate interventions failed when a large consumption was in question. Somewhat less complex system of evidencing was applied when monitoring fuel consumption, particularly in case of open pits having their own pump stations. Rarely, complex factors influencing the consumption of energy and material were analyzed such as the efficient technological processes and efficient organization of labor. Since recently, consumption of energy and material at open pits in Yugoslavia has become more actual.

Of course, equipment quality is also the factor to affect the energy consumption. Todays, Hongxing has many new types of coal mining equipment: VSI coal crusher, ultra-fine micro powder grinder, high pressure Raymond mill, super fine impact crusher.

14-11-2011 om 02:46 geschreven door annazhao356  

Transportation exists and is seen everywhere. Some transportation costs little, while some costs much just like machinery transportation. And also some transportation is complex. Facing so many types of transportation, there are various system to deal with them. As to coal and ore transportation, a new type of transport system appears.

The new system is now available that could bring incredible benefits to the mining industry. The system can potentially eliminate the need for constructing new railways to transport coal / ore from the mine to the port (or other destination).

The great thing about it is that the same system can also be used to transport workers to / from the mine, in many cases eliminating the need for expensive fly-in-fly-out (FIFO) transport. The system can also be used to transport supplies to / from the mine.

Another major benefit for the mining industry is that this system can eliminate the need for expensive port loading infrastructure because the transport modules can load directly into ships.

This system is also an answer to some of the criticism received from the environmental movement. The system can be installed with minimal earthworks and can cross sensitive environmental areas with minimal impact. The system is also extremely fuel efficient.

The cost to install the system is about half the cost of installing a conventional railway line. If you combine the savings from line construction and eliminating the port requirements, the savings amount to hundreds of millions of dollars. In some cases, this can mean the difference between proceeding or not proceeding with a new mine development.

Problems are anytime, but ways to solve them are developed by human's intellegence. With advanced technology, any difficulty can be resolved and performed successfully.

14-11-2011 om 02:32 geschreven door annazhao356  

Hammer crusher is mainly broken by the shock effect of the material. The grinding process is more or less so, the material in the grinding machine, was impacted by high speed rotation of the hammer and broken material, broken, obtained from the kinetic energy of high-speed hammer to the deflectors body structure, screen, while the material of conflict, have been repeatedly broken, the gap is smaller than the display of downloaded material from a distance, the larger the materials in the bar of the screen again by the impact hammer, grinding, pressing and crushing, the material was produced from the difference obtained the required size of the product.

Any machine has one part or parts which are easy to wear down. So, as to a hammer crusher, how is the situation and how to solve the problems?

Hammer crusher failure and exclusion:

1) bearing overheating

Reasons: lack of fat, too fat, fat dirty degenerate, damage to the bearings.

Remedy: fill in the amount of fat, grease the bearings must be executed within 50% of its space, cleaning the bearings, fat replacement, replace bearings.

2) the particle size is too big

Reasons: excessive wear of the hammer, the projection of the fracture.

Remedy: Change the hammer to replace the bar screen.

3) reduction of production

Reasons: the projection of the gap is blocked, irregular feeding.

Remedy: parking, cleaning up the gap in the screen of the obstruction, adjust the power agencies.

4) percussive links

Reason: pin loosening, wear elastic ring;

Solution: stop pin and tighten the nut, replace the snap ring.

5) drum machine internally generated

Reason: no broken the device materials, fasteners loose line, impact hammer in the lining, hammer or other broken parts.

Remedy: parking, cleaning the grinding chamber, check the lining of the setting and the hammer and the display of the gap, replace broken parts.

6) the vibration of the machine

Reason: The replacement of taking the hammer and wear or sub-cone rotor static balance requirements, broken rotor imbalance hammer, pin bending and breakage; Triangle Park, drive or cracks, loose screws.

Remedy: Remove the hammer, weight, select the hammer, so that each hammer hammer hammer axis relative to the total weight of the hammer to its total weight of the axis is equal, meeting the requirements of static equilibrium, hammer replacement, pin replacement, repair or replacement welding, screw.

14-11-2011 om 02:26 geschreven door annazhao356  

In mining industry, milling machinery plays an important role and there are various kinds to meet different working environment, such as 3R or 4R Raymond mill, ball mill, micro-powder grinder, roll mill, rod mill and so on. Starting milling, should check whether all the maintenance doors closed tight, check the crusher jaw plate gap is in line with the feed grain size, adjust the analytical engine speed should reach approximate finished size requirements. And press to start the order.

1. starting basket bucket elevator;

2. activate the jaw crusher;

3. when there are material silo, start analysis machines;

4. to start the air blower (air load to start until the normal operation after the load);

5. start the host, start the host instant starts electromagnetic vibrating feeder.

Grinding work shall be started at this time. Simple sequence of operations are as follows: Start: enhancing machine crusher → Fan → → analyzer mainframe → Feeder. Shutdown should be in the following order the closure of the machine:

1. first close the feeder to feed material;

2. about one minute after the cessation of host;

3. blowing the net residual powder after the cessation of sub-blowers;

4. the final closing analyzer.

As to the tips for maintenance, there are some suggestions below:

1. Milling machine using the process, there should be regular staff responsible for the custody of the operator must possess a certain level of technology, milling machines are installed before the operation is to conduct technical training for customs officers must make to understand the principle of mill performance, familiar with operational procedures.

2. For the mill to work, there should be equipment 'Maintenance of the safe operation of systems' can ensure the long-term safe operation of mills at the same time have the necessary repair tools and accessories grease.

3. Mill use for some time, maintenance should be carried out, while roller grinding ring Blade repair of wearing parts such as replacement roller device in use before and after the connecting bolt nut plug should be carefully examined whether there is loosening , lubricating oil is to add a little grease.

4. Roller devices of the time more than 500 hours or so to replace the roller when the roller kit must be cleaned of all rolling bearings, damaged parts should be replaced, dispensing fuel or butter can be used to manually hand gun.

Milling machine in the normal working hours are not allowed to refuel at random, to ensure safety in production and milling machine in any part of the unusual noise, or a sudden increase in load should immediately stop inspection, troubleshooting, so as to avoid a major accident. Then continued to boot mill must be removed within a more than expected, or when the current boot is too large, the impact starts.

12-11-2011 om 02:44 geschreven door annazhao356  

Raymond Mill mainly by the host, analyzers, blower, finished cyclone, cyclone powder and air tube. Among them, the host from the rack, inlet volute, blade, roller, grinding ring, cover composition.

In the working process of Raymond mill, how is the winnowing process? After grinding the material, fans will be blown in the White case, the blowing powder, placed in the grinding chamber through the top of the analyzer for sorting, fine through coarse material into the grinding raymond mill chamber and re-grinding, compliant with the fineness airflow into the cyclone collector, collected and discharged through a powder outlet, is finished. Airflow from the top of a large cyclone collector tube back into the return air fan, air duct is circular, and in the flow under negative pressure, circulation air duct to increase air flow between the host partly by the exhaust fan and exhaust pipe into the small cyclone collector device, for purification.

Correct operation is important for a machine, such as jaw crusher, cone crusher, impact crusher, ball mill, sand washer, belt conveyor, and the maintenance is also useful to extend the machine's life. Just taking Raymond mill as an example.

1. Non-metal block into the machine, otherwise it will damage the grinding roller and grinding ring, and even center hanger.

2. The feeding should be uniform, not suddenly much less ignored. Excessive feeding blocked duct will reduce the yield, easy to burn out the motor, feeding too little will affect production. Feed size: hard materials less than 15 mm in diameter, preferably, soft material for the 20 mm diameter, non-bulk material added to the machine.

3. Air volume control: the intake pipe is located on the blower air volume control valve, generally open to the maximum position, according to fineness, yield requires an appropriate adjustment. Located on the exhaust pipe outlet exhaust valve, transferred into the feed opening can be no dust emitted. Air volume is small, thin high. It should be noted, the wind is too small, the host is easy duct below the sediment material, please adjust.

4. Fine adjustment, based on the size of the material, hardness, moisture content, the proportion of different degree of processing are different thickness, can be adjusted at the top of the analyzer, high speed, fineness, low speed, low fineness. Improve the fineness, the output will be reduced accordingly, if it is mainly the fan speed when debugging, the user can flexibly.

5. Ring roller raymond mill scrap the limit, the minimum remaining wall thickness of not less than 10mm.

6. Stop, stop feeding, the system still continue to operate, continue to make residual abrasive grinding, about a minute, turn off the main motor and the motor analyzer, stop grinding work, and then stop the fan motor to blowing off the powder residue.

12-11-2011 om 02:44 geschreven door annazhao356  

Construction, demolition and landclearing debris (CDL) is all non-hazardous solid waste resulting from construction, demolition and landclearing (CDL) activities. CDL waste materials that can be salvaged, reused or recycled include, but are not limited to, the following:acoustical ceiling tiles, asphalt, asphalt shingles, bricks, cardboard, carpet and pad, concrete, dirt, drywall, fluorescent lights & ballasts, insulation, landclearing debris, metals, paint, porcelain, wood, plastic film from packaging, window glass, wood, field office waste (paper,cans, glass & plastic bottles, cardboard) and so on.

The current construction waste recycling already have some technical basis, regardless of the laboratory research or market applications have certain results. Henan Hongxing Mining Machinery Co.,Ltd self-developed hydraulic drive track-type mobile crusher station and tire mobile crusher station, the construction garbage coarse broken, the broken and broken bits, according to the different needs of different customers to flexibly configure a crushing, crushing two and three Grade crushing mobile crusher station equipment, while at all levels to optimize the combination of crushing and screening, we will do our best to meet customer needs. With regard to mobile crusher station 'broken after the first screening' of 'first screen after the broken' and detailed process. Many of the waste of construction waste through sorting, remove, or crushed, the majority can be used as renewable resources, re-use such as: scrap steel, scrap wire, scrap wire, and various accessories and other metal scrap, after sorting, concentration, re-melted again after the processing and manufacturing into a variety of specifications of steel; waste timber bamboo can be used to make artificial wood; brick, stone, concrete and other materials through the crush, they can on behalf of the sand used in masonry mortar, plaster mortar, playing concrete cushion and so on, can also be used to produce building blocks, paved Road, brick, tiles and other building materials lattice. Additonally, there are advanced jaw crusher, cone crusher, hydraulic cone crusher, Raymond mill, micro powder grinder, high efficiency impact crusher.

Because of construction waste dumping are relatively concentrated, space is limited, and traffic is not very convenient, so SBM use of mobile screening equipment, the Commonwealth, equipment and flexible, convenient, highly mobile, can save a lot of infrastructure and relocation expenses; be able to carry out material on-site crushing of materials transported from the scene without having to re-broken, and can advance with the surface mining of raw materials that move, which significantly reduce the transportation costs of materials. mobile crusher station flexible configuration and can be modified according to the actual site design or special features of mobile crusher station, designed to correspond to the construction waste disposal process. HXJQ's mobile crushing station including hydraulic drive track-type mobile crusher station and tire mobile crusher station. Wheeled mobile crusher station including the standard type, closed type, single combination series, and two combination of crushing series, standard also includes mobile jaw crusher station, mobile cone crusher station, back-breaking mobile crusher station, vertical shaft impact crusher broken mobile feeding stations and cone-breaking mobile crusher station; closed-loop model also includes closed-circuit-type cone-breaking mobile crusher stations, closed-circuit-type back-breaking mobile crusher station and closed-circuit-type shock-breaking mobile crusher station; single combination of broken family also includes back-breaking combination of mobile screening Crushing Station, jaw-breaking combination of mobile screening stations and cone crusher screener breaking combination of mobile crusher station; hydraulic drive track-type mobile station, including track-type mobile crusher jaw-breaking station, back-breaking Tracked Mobile Crusher, cone crusher broken track-type mobile Track screening stations and mobile crusher station series.

12-11-2011 om 02:43 geschreven door annazhao356  

Recent years, many towns and cities are creating the 'new city', and the transportation status is the first point to innovate. Such as Zhengzhou, here the railway construction is undertaken in great scale. Speaking of railway construction, machinery is necessary, such as excvavtor, crane, jaw crusher, impact crusher, belt conveyor, vibrating screen, vibrating feeder and so on. Taking the process of the railway track ballast production line as an example.

Railway track ballast is packed between, below, and around the ties. It is used to facilitate drainage of water, to distribute the load from the railroad ties, and also to keep down vegetation that might interfere with the track structure. This also serves to hold the track in place as the trains roll by. Ballast crushing and screening plant consist of jaw crusher, cone crusher, impact crusher, VSI stone crusher, vibrating screen, and belt conveyers, These machines are of advanced structure, good performance, high reliability (such as jaw crusher achieved EU CE Certificate), and praised by many customers home and abroad. The crushing and screening capability can be from 50 tons per hour to 600 tons per hour. The size of crushed product can be from 0 to 50 mm. The classification of size of crushed product can be set and adjusted according to customer’s different requests.

Big size stones are transferred to primary crusher through vibrating feeder from hopper for first crushing, then the crushed materials are transferred to impact crusher through belt conveyor for secondary crushing. The materials crushed will be transferred to the vibrating screen, and separated to different sizes. The aggregate with suitable size will be transferred to the final product pile and aggregate with unsuitable size will be transferred to the impact crusher for re-crushing. This forms a closed and manifold cycles. The sizes of final products will be graded and separated according to customers' requirements, and the duster will be attached for the sake of environment protection. The track ballast production line are reasonable combined with different crushers and have compacted special crossing distribution in their material processing flow design, so that they are small foot printed of fields, high quality in crushed products, low in quarry dust and they will give you high reward for your investment. Their advanced electric control panel can assure the whole process discharge smoothly, running reliable, operation easily and high efficiency in power consumption.

12-11-2011 om 02:42 geschreven door annazhao356  

On the seminar of equipment manufacturing in 2010, experts pointed out that the high-efficiency and energy-saving is the developing trend of the mining machinery equipment. Until today, the trend is more and more outstanding.

Experts think that opencast working equipment is developing for the high-reliability, energy-saving, high-comfort, auto-operating condition surveillance and autocontrol, which adopts many methods, such as power supply by controllable silicon, timing by AC frequency conversion, concentrated lubrication by grease, shock absorption, pressure and purification in the cab, air conditioner and noise elimination and is equipped with operating condition surveillance and autocontrol by microcomputer.

Hoisting equipment is oriented on the safety and reliable work, which adopts the computer control and dynamic measurement technique on the working life and efficiency and the build-in attrition elevator on the machine structure. The crushing equipment adopts hammer double-rotor impact crusher and the product structure is developing for the fine crushing. The development of high-new equipment requires plentiful functional materials and the application of modern fine crushing technology has become an important symbol of embodying the national technology level. Not only for fine crushing, and for ultra grinding, we design and manufacture ultra jaw crusher, micro powder grinder, high pressure Raymond mill, fine ball mill, super fine grinding machine.

For the washing equipment, all the countries are exploring the new way to meet the separating requirements of diversified minerals and different impurities and make the separating equipment developing for the high-efficiency and diversification. The high-efficiency concentrator substitutes the common concentrator in some fields and the new filter will develop quickly, such as auto-filter press with extrusion die and the horizontal belt filter. Now, the developed countries are promoting the development of single machine automatization and whole electromechanical integration. The jigger, auto-filter press, sedimentation filtering centrifuge, flotation machine, high-efficiency concentrator and swirl nozzle adopt auto control by computer for parameters. . And all our products are in good quality and high reliability.

12-11-2011 om 02:42 geschreven door annazhao356