Henan Hongxing Mining Machinery Co., Ltd. is the professional manufacturer for all series of mining euqipment in China and specializes in the design and manufacturing.

Mines in the universal application of the ball mill the design, production and transformation, has accumulated rich experience, has formed its own unique addition to the ball mill series, but also the old energy of a ball mill, is now on the situation described below.

Feeder improve the use of most of the past Mill spoon for the first joint feeder expected, because of the first cuben spoon and self-respect and eccentric, and Washa, with the deposition of the ores of friction and impact, the ball mill to produce periodic eccentric load and the impact load, the motor running under varying load conditions, not only to increase capacity and also the current volatility, showing a half-cycle accelerated, semi-cycle slowdown in the speed movement. This cyclical impact of the eccentric load and load, the main bearing wear, cylinder connected by bolts, and the mesh size gears and motors have great impact on the heat, shortened the life.

A drum-shaped feeder can avoid these drawbacks, subject to the classification of the sand to the system transformation, longer-grade bays, installation of point of adjustment, change the ball mill and the classification of the distance between the Top-grade increase automatically to the sand, from the classification of ore in the upper row, with sand flow back to the trough, the height difference on gravity and ore into the groove with Feeder, after the transformation of the ball mill not only improve the reliability of the equipment and maintenance. But there are significant energy-saving effect.

30-12-2011 om 07:05 geschreven door annazhao356  

Henan Hongxing Mining Machinery Group is a large manufacturer for crushing, grinding, screening mining machinery from China. Recently, New products (Mobile Crusher and VSI crusher ) have designed and began to sell in large. In face, VSI Crushers from Hongxing Machinery are innovation , they are not a copy of any other make machine. The main principle is Vertical Shaft which is common in other make machines. The design of the rotor, anvil sectors, the material used is entirely different than any other make. The VSI Impact Crusher of HXJQ is very efficient in operation. The wear out parts can not be the only criteria to compare any two make machines. Some other things also should be considered.

The efficiency of the machine, energy required per ton of crushing, overall life of the bearings, and other parts, general breakdown, and time required for it's maintenance, cost of wear parts, and replacement time, daily lubrication cost and time required for the same should also be considered. The total manufacturing cost of crushing is explained in details. Here we will cover all the points for your reference.

1).The wastage of energy in friction loss is reduced to a minimum.

2).Life of the bearings in our machine is not less than 10,000 working hours or even more. This is a estimated life.

3).The main shaft of our machine is made from special steel, and no failure or breaking is recorded. The fitment of the shaft is also special, and is not directly connected to the bearings. Shock load if any, due to any reason is soaked by the shaft it self and very less chances for it's transfer to the bearings.

4).Wear parts are the main thing for the economical running of the machines.

5).A very special design of anvil sectors, particularly for Rotopactor utilizes the residual energy of the particles and makes the edges rounded and gives good surface texture Due to rolling and rubbing action.

30-12-2011 om 07:05 geschreven door annazhao356  

Recently, the domestic price of iron powder and iron ore prices have dropped trend. Domestic iron powder market started from August 10 lower, from August 7 to 920 yuan / ton down to 770 on August 26 yuan / ton, just two weeks, or 150 yuan, the current fine iron powder prices have dropped to the level in early July. While imports of iron ore spot price has lagged behind, starting from August 17, grade 63.5% Indian iron ore spot price began to fall outside the plate, from 110-112 U.S. dollars / ton high drop of 96-98 August 25 U.S. dollars / ton, down $ 14 / ton, down to the level of the end of July.

According to statistical data can be seen, compared with the first quarter of this year, significant improvement in the current market, especially the ball ore market is already showing signs of recovery. But to return to the market in September 2008 before the outbreak of the financial crisis, the situation also takes a long time.

Rise in iron ore production, directly stimulate the growth of demand for iron ore, which is for the mining machinery industry is also a happy event, the Navigator as mining machinery, to Henan mining machinery, crusher, milling machine Hongxing as the main heavy industry has been stable in the mining machinery industry leading position. Sand bearing installation because of its unique design with advanced spindle is widely used in highways, water industry, high standards, we have recently introduced a variety of new Sand to meet customer needs in various fields. In Mill and crusher equipment, 20 years of technical achievements of the crystal quality and reputation. These devices have a useless, not to mention the great nation-building can contribute to development and national income improved significantly.

30-12-2011 om 07:05 geschreven door annazhao356  

Blast furnace slag, used as a raw material in organic chemical industry, are used to produce acetylene gas for rubber, synthetic fiber as well as plastic industry. The other usage of our calcium carbide are cutting and welding of metal. These products are used for hot metal desalinization.

Over the years, Hongxing machinery have developed an efficient method of installing the media, which minimises crushing and compaction. To begin with, the media is hauled to site and screened to remove any dust caused by transportation. The media is then conveyed into the bed using the companys truck-mounted telescopic conveyor. This is a very quick and efficient method, which ensures that no weight is put onto the media during installation, avoiding any compaction. The media is conveyed into the bed at a shallow angle, rather than being violently dropped into position.

Single stage fine crusher, high efficiency fine crusher can used in crushing blast furnace slag. and single stage fine crusher, high efficiency fine crusher are used in cement clinker grinding machinery, cement mixing materials crushing plant.

Existing media can be recycled. When refurbishing existing beds, if the media is in a reasonable condition, it can be excavated, cleaned on site and replaced into the filter.

30-12-2011 om 07:05 geschreven door annazhao356  

Crusher is the common and important equipment in mineral production. So it's necessary to do preventive maintenance of rotors of crushers. Let's introduce the steps of daily maintenance taking hammer crusher as an example.

Forewarned is forearmed, without prejudging the waste. Rotor preventive maintenance can greatly extend the rotor using life, reduce crusher failure, improve the utilization rate of crusher and effectively improve the crusher production. What benefits can be got from preventive maintenance of rotors?

A) What are the main content of rotor hammer dish repair in hammer crusher are?

Hammer dish installation. The cooperation of key and keyway should be paid attention and checked and each hammer dish should be tightly fitted with each other. Lock device is checked and can be changed when necessary, to prevent hammer dish removing and spindle shifting.

B) For the excessive worn crusher rotor, what are the main faults?

The main faults of the hammer crusher are: hammer shaft hole on hammer dish and the outer edge are worn seriously, hammer shaft fracturing, hammer dish cracking, lock device failure, spindle displacement, bearing heating, bearing damaged, spindle deformation and even rupture.

C) Why is there regularly rotor work analysis, life prediction and plan to overhaul maintenance?

In hammer crusher, the high speed rotating hammer will impact and crush and grind the limestones. For the equipments in long working time is bearing the impact and friction of materials, rotor members are worn, deformation, damaged and will lose the normal work ability, which is inevitable. If we don’t do regularly rotor work analysis, life prediction and do planned maintenance and overhaul, once emergencies appear, these emergencies will cause severe losses that all production will stop,which is so serious to the enterprises.

D) What are the main content of hammer repairing and gradation on hammer crusher are?

The main content of hammer repairing and gradation on hammer crusher are: hammer is the main work parts in hammer crusher. Hammer dish is divided into several parts along the circumference and equipped with N hammers. Adjacent hammer interlaced and the hammer can do full circle swinging in 360 degrees. When the front edge of hammer are worn to the two-thirds of width, the hammer can be turned over to be used again. The worn hammer can do bead weld antifriction alloy and save a large amount of metal material consumption.

30-12-2011 om 07:05 geschreven door annazhao356  

Magnetic control of process equipment in order to achieve the safe operation ofmagnetic separation equipment to ensure the smooth flow. It includes a continuous magnetic separation process equipment startup, shutdown, and troubleshooting automatic interlock operation; intermittent ore magnetic separator to process control and so on.

Continuous magnetic separation process in order to avoid flow blockage or overflow ore, usually equipment by reverse flow direction Mine started mining flow along the direction of downtime, failure alarm signal and stop sending equipment to the mining and automatic diversion to avoid accidents to expand. Control objective is to concentrate on ensuring the quality and recovery under the premise of improving the processing capacity of magnetic separation equipment. Magnetic Separator process parameters to the ore, pulp density, magnetic field strength, magnetic separator divided the constituency level, magnetic separator speed and grade of such concentrate and tailings.

Magnetic separation process control equipment, mainly magnetic separation process sequence control, to the ore deposits, the concentration of control plasma, magnetic separator and magnetic sub-constituency level control grade multi-parameter control. To mine on the continuous magnetic separator, such as the interruption to the mining of high gradient magnetic field of electromagnetic separator, in accordance with certain procedures required to run: (l), magnetic separator connected Power supply For excitation; (2), into the pulp to a magnetic separator and sorting; (3), stop and make the slurry returns to the ore mixing tank; (4); disconnect power to the magnetic excitation; (5), discharge magnetic magnetic minerals within the selected machine. And the cycle repeats the procedure. Magnetic separation process sequence control by the sequence controller (see mineral processing equipment in order controller) to achieve, according to the technical requirements of the order of pre-programmed control and into order controller.

Magnetic grade multi-parameter control process in the magnetic separation, magnetic separation quality factors affecting the nature of ore to ore, pulp density, sub-constituency level, magnetic separator speed, wash water flow, flow and discharging material magnetic field strength. Such as continuous high gradient magnetic separator, electromagnetic separator process to mine the nature and amount of ore is a major disturbance, then the impact of concentrates, tailings grade of the main control parameters of a hand selected pulp density, sorting disk rotation speed and magnetic field strength , the relationship between them with mathematical models to represent and use of multi-parameter control systems. Control system based on the original, refined, a useful component of the tailings grade, pulp density, to measure parameters such as ore, pre-established mathematical model of computing, issue the appropriate command, respectively, the corresponding execution control device to regulate the flushing water separator , sorting disk rotational speed, magnetic field excitation current and dehydration (grade) equipment product concentration, to enable the tailings grade meet process requirements.

30-12-2011 om 07:04 geschreven door annazhao356  

Hydraulic cone crushing station should be installed in the place where suit to facilitate the operation.Locking hydraulic cylinders and hydraulic cylinder should be connected with their corresponding oil-ways, in order to ensure the hydraulic cylinders push forward and backward simultaneously. When hydraulic parts installed, operator should take a pressure tested, and the test pressure should be 14MPa. In the process of testing, residual gas should be discharged from the hydraulic piping and locking cylinder through the pipe and screw plug at the bottom of the accumulator.

Before the locking hydraulic cylinder pressure testing, the accumulator must be filled with 7.5-8MPa nitrogen. Please ensure the hydraulic system pressure relief before filling nitrogen,and when promote the hydraulic cylinder pressure test, you should make the lock cylinder pressure relief. Ensure all components no seepage, no leak, flexible and reliable instrument in pressure test.

After pressure testing, then process the adjusting device test to insure flexible operation and hydraulic components working reliably.

29-12-2011 om 07:50 geschreven door annazhao356  

A new way of applying the primary/secondary crusher circuit--combining a larger horizontal shaft impact (HSI) crusher with a smaller secondary HSI crusher--is proving to be profitable for some aggregates producers, increasing production and decreasing wear costs in an array of applications.

Although some applications still call for the primary-jaw/secondary-cone circuit to reduce wear costs and maintain productivity, some producers say it's overkill for crushing many recycle and aggregate materials.

Recently, in Monterey, Calif., at the Fort Ord military base, Kroeker encountered an unusually challenging application for its crushing and screening circuit. The materials being crushed from 352 demolished military homes contained an extremely high amount of reinforcing materials in the lightweight concrete walls. 'On typical jobs, we will fill one 40-yard bin with rebar each week. With this material, we are filling two 40-yard bins every day,' says Jason Strickland, superintendent for Kroeker Inc. This forced Strickland to open the apron settings on the 1400-45 and production suffered. The wider settings delivered about 60 percent passing spec the first pass, increasing the amount of returns. Running only about 30 percent of feeder speed capacity, Kroeker averaged 1,500 tons of spec product per day.

Immediately Kroeker experienced a substantial increase in production. According to Strickland, 'After installing the UM 04, our average production increased to 2,200 tons per day,' even though much of the feed was a 70 lb./cu. ft., lightweight concrete. Strickland estimates that when crushing normal California concrete recycle, production will increase to 3,000 tons per day.

The cost of the nearly 47 percent increase in productivity at the Fort Ord application was a relatively low, $118,000 for the base skid-mounted impactor with diesel power and an additional 4 gallons of fuel per hour. Cost savings were reported with impactor blow bars as wear life increased substantially on the UltraMax 1400-45, since the overs were sent to the UM 04 secondary impactor. Producers and contractors, like Kroeker, are now taking another look at a unique combination of primary and secondary crushing. While not an entirely new idea, many material processors are experiencing significant cost advantages by matching the large primary HSI crusher with a smaller secondary impactor to increase production and maximize component wear life. They are also reaping the benefits of a cleaner, cubical spec product that can be sold to all customers.

By design, impactors deliver a much higher percentage of material passing spec the first pass than that of a jaw crusher. The primary and secondary apron settings of an HSI crusher can be set to deliver the desired amount of passing product to optimize circuit efficiency.

In hard rock and heavily reinforced concrete recycle applications, the settings can be opened so that as little as 60 percent passes spec upon initial reduction. Or, in medium rock and normal asphalt and concrete recycle applications, apron settings can be tightened to where more than 80 percent of the initial reduction will pass spec.

By opening these apron settings and diverting oversized material from the primary circuit, significantly more feed material can be loaded into the primary impactor, improving production. Since the percentage passing spec the first time through the crusher is dramatically higher with an impactor primary versus a jaw primary, the secondary impact crusher can be much smaller than a cone secondary. This means not only the initial purchase price but also long term horsepower and fuel requirements are significantly reduced.

29-12-2011 om 07:50 geschreven door annazhao356  

Hongxing Machinery has formed a crusher equipment, sand making equipment, milling machine equipment, primarily to the production line equipment, supplemented by the mining machinery and equipment base. Currently mining machinery in the economic construction, scientific and technological progress and social development have occupied a very important position and role, is a pillar industry. Because Hongxing machinery manufacturing crusher must be long-term stability in quality and advanced to meet the economic development of the construction, coal, artificial sand, paint and other material needs.

Quality, quality, is to be done in terms of quality and technically excellent and accurate. Technology has become a prerequisite for the market around, more and more enterprises correct understanding of the technology itself. For the domestic mining machinery manufacturing enterprises in the international market grows, we must first advance in technology and long-term stability. From the mining machinery industry so many years of development and practice, improved technology has always been considered the only choice for healthy development of enterprises. So take a firm 'technology of establishing enterprises,' the road, fully aware that there is no good research can not have a good level of product quality, and continuous introduction of advanced mechanical engineer, and constantly develop new equipment, improving old equipment.

Then one is quality, with good technology, but also good quality, and quality of R & D has a very profound internal relations. Anything can not be achieved overnight, and machinery manufacturing industry is the same reason. The formation of product quality has three main processes: R & D, manufacturing process and use of raw materials. Quality indicators for each stage of acceptance must be strictly controlled, so as to ensure the quality of the product with excellent innate. Hongxing in all aspects of production have developed a corresponding responsibility, to the people, stringent quality checks to ensure that each manufactured devices are optimal.

29-12-2011 om 07:50 geschreven door annazhao356  

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Caterpillar, the world’s biggest maker of earthmoving equipment, has strengthened its presence in the mining machinery market by striking an $886m deal to buy ERA Mining Machinery, a Chinese manufacturer of underground coal-mining equipment.

The proposed acquisition builds on Caterpillar’ $7.6bn purchase last year of Bucyrus International, another maker of mining machinery. That deal transformed the company into the world’s biggest supplier of large mining equipment.

Doug Oberhelman, Caterpillar chief executive, has identified the mining industry as a key area of expansion.

Buying ERA would enable Caterpillar to make further inroads into China where coal mine operators tend to prefer local brands over US equipment.

Caterpillar is in a race with rival Joy Global, a US mining-equipment maker, to take market share in China’s mining industry. Joy Global announced plans in July to buy a 41 per cent stake in China’s International Mining Machinery for $585m.

Steve Wunning, Caterpillar group president with responsibility for resource industries, said the ERA deal “underscores Caterpillar’s long-term commitment to continue to invest in China in order to support our growing base of Chinese customers”.

Mr Wunning said Caterpillar hoped both to expand in China through ERA and to use Caterpillar’s global presence to sell the company’s products internationally.

The deal values ERA at up to HK$6.9bn ($886m), a one-third premium on the company’s stock price before trading was halted in Hong Kong on Monday on expectations of the acquisition being announced. The deal is subject to approval by ERA’s shareholders and Chinese regulators.

“This is another indication that CAT is leveraging itself to what we think is a relatively long-dated international mining up-cycle, driven by relatively strong emerging market commodity demand,” wrote analysts at Barclays Capital in a research note. “While we would not be surprised if this announcement generates some investor concern given potential sentiment that mining may be somewhat late in its cycle, we believe that the mining end market is still in the middle innings of growth.”

Citigroup Global Markets Asia advised Caterpillar on the deal, while Blackstone advised ERA.

29-12-2011 om 07:50 geschreven door annazhao356  

Hong Kong-listed Chinese coal producer Yanzhou Coal Mining is set to take over Australian coal miner Gloucester Coal for AUD2.1 billion (USD2.13 billion). Under the agreement, Yanzhou Coal’s Australian unit Yancoal Australia will merge with the Australian Securities Exchange (ASX)-listed Gloucester Coal.

Yancoal Australia will acquire the entire issued share capital of Gloucester for which the latter’s shareholders can either choose to receive shares of the new merged entity (Yancoal Australia) or a combination of Yancoal Australia shares and contingent value rights (CVR) shares.

Upon the merger’s completion, Yanzhou Coal will own 77 percent of the merged entity while the Gloucester existing shareholders will own 23 percent of the new company, which will continue to trade in the ASX. Gloucester shareholders will also get AUD3.2 in cash per share in the form of special dividend, payable prior to the effective date of the merger as well as capital return of about AUD2.64 per share payable six months after the merger’s implementation.

The takeover is subject to the approval of Gloucester and Yanzhou shareholders as well as regulatory approvals in Hong Kong, China and Australia.

Singapore-listed Noble Group, currently the controlling shareholder of Gloucester with 64.5 percent equity, has backed the takeover offer. The company said it intends to vote for the proposed merger subject to approval by the Noble board of directors and in the absence of a superior proposal, and would elect to receive all ordinary shares as the consideration not including any CVR shares.

“The cash component will crystallize a significant portion of the value in Gloucester shares, while also allowing Gloucester shareholders to retain an ongoing interest in the combined Gloucester and Yancoal assets,” Noble said in a statement. The commodity supply chain manger intends to hold its shares in the combined entity for value accretion, expecting the merged entity to have significant cash flow generation that should underpin a progressive dividend policy.

The merged group will have 11 operating mines in New South Wales and Queensland in Australia.

Citi, Goldman Sachs and UBS are advising Yanzhou Coal; Lazard is advising Gloucester and the Blackstone Group is advising Noble.

29-12-2011 om 07:50 geschreven door annazhao356  

21 century, Mining Machinery Industry into an unprecedented phase of rapid development. Developed countries attach importance to the development of equipment manufacturing industry, not only in the proportion of domestic industry, accumulation, employment, contribution to account for the forefront, but also in the equipment manufacturing industry as new technologies and new product development and production to provide important material foundation of modern economy indispensable strategic industry, even into the 'information society' industrialized countries, without exception, attach great importance to the development of mining machinery manufacturing industry.

China mining machinery industry enterprises in the production scale and economic strength, product technology, management and achieved a qualitative leap in the international market triumph. However, also accumulated in the development process of independent innovation, low base Parts Dependence on foreign high-end products is relatively backward technology and market development capacity is not strong and so on. Mainly in mining equipment export market, mainly in Asia, Africa and other Third World countries, exports to the low-end as the more high-end markets in Europe and America and other countries despite Liugong Brand products to other enterprises, but very few. Compared with Caterpillar, Komatsu and other internationally renowned Crusher Firearms manufacturers, China's crushing machinery room for more.

International mining machinery production network characterized by multinational companies led many suppliers based on complementary division of labor model. In this mode, the industry's international competition is divided into two levels: first level, is the competition between multinational companies, such competition in the industrial chain of high-end, leading the industry in market development; the second level, is one of many suppliers in the complementary division of labor market competition, such competition in the industrial chain of low-end, and the competition of a large number in the 'world factory.' The first level is the knowledge and technology innovation competition, is to obtain the higher interests of the competition; second level is the scale, efficiency, quality, cost, price competition, which subordinate the first level, the economic benefits of competition in the lower .

Structural adjustment in the global economy deepen, mining machinery manufacturing production methods and management models are also undergoing profound changes of today, can take a favorable market, the key factor in the price war has shifted to the development of war came. From the present point of view, International price of mining equipment production sites have been clearly different. In order to maximize the development and transfer of the developed countries continue to increase the industry's efforts, the mining machinery products with low added value products to the market arrangements for the potential demand for production in developing countries: to adapt to changes in market demand, major producers have to take professional production, the 'single-variety and large quantity' has become the way many advanced new features production; both producers and gradually led to the production of customized consumer-oriented mode of production changes. Personalized service has become an important factor in competitive success.

In the face of international famous brands without fear, to 'R & D strategy' gradually knocking door to international markets in Europe and America, to become the industry leader well-deserved. New R & D project: hydraulic drive track-type mobile crushing plant, PFW European version of the Crusher, JC European version of the Crusher, VSI5X centrifugal impact crusher (sand making new), VW high-grade stone shaping machine ( New sand making machine), MTW European ladder mill, LM vertical milling machines and other equipment, due to equipment performance and the international manufacturing standards at the same level, from the device Sell Since the market in Europe and the United States favored by customers!

29-12-2011 om 07:49 geschreven door annazhao356  

Rail transportation is convenient, fast, safe and environmentally friendly advantages, the development of rail transport is to solve the traffic problems in major cities in an effective way, is also an important energy saving measures. With China's urbanization and population trends in travel automation to speed up large-capacity rail transit construction for ease traffic congestion, improve travel conditions for the residents, to promote energy conservation and environmental protection of land, the layout of the city leadership has an important role in optimal conditions. Urban rail transit will and real estate, cars together to promote China's economic development as three bright spots.

In 1876, China appeared on the land first railroad; 1969, China's first underground railway opened to traffic; 2008, China's first independent intellectual property rights, world-class high-speed rail - the official opening of the Beijing-Tianjin inter-city rail operations; 2010 West Zheng run successful high-speed rail. Today, China's rail transportation industry for more than a century through the development process, to promote China's economic construction and social development has made a great contribution. China has the world's largest rail transit construction market, has attracted worldwide attention. More and more companies are involved in the field quickly, and then in an increasingly large share of the most beautiful areas of the market share.

High-speed railway, the railway construction are inseparable from the construction sand and gravel aggregate materials to do, and as the development of its construction sand and gravel aggregate grain shape and quality requirements are more stringent, the production equipment, sand and gravel aggregate requirements are more stringent.

Henan Hongxing Mining Machinery Co., Ltd. is a professional manufacturer for ore crusher, crushers, Construction Sand and other mining machinery, which along with the development of science and technology, continuous innovation, to create a series of sand and gravel aggregate production facilities, which include: vibration feeder, jaw crusher, impact crusher, cone crusher, sand making machine (5X series sand making machine, VSI series sand making machine, PCL series sand making machine) vibrating screen, with its stone tablets can form shaping, but also can be used for stone shaping machine, and its full compliance with national building standards requirements.

The next 50 years, China's urbanization rate will increase to 76% or more, the city's contribution rate for the entire national economy will reach 95%. Metropolitan, urban agglomerations, cities and urban centers with the development of the urbanization process in China indicates that the high-speed take-off, also indicates that the construction industry a much broader market is coming. China has become the world's largest urban rail transit construction market, whether it is to build speed, or the scale of construction, China's rail industry has entered a golden period of development the best. This, undoubtedly, the world aggregate production within the field of crushing machine manufacturers to provide an unprecedented market space and development opportunities.

29-12-2011 om 07:49 geschreven door annazhao356  

Iron ore processing flow chart Iron ore mining processing flow may be the front physical manufacturing process in steeling making course. From the iron ore processing flow chart picture, we are able to start to see the iron ore process flow goes as follow: Raw iron ore is exploded in the iron ore mines firstly. Then vibrating feeder will feed iron ores to the iron ore primary crusher crushing cavity, by which large size raw iron ore will be resized into iron ore sand.

The iron ore sand is transmitted into secondary crushers by belt conveyors evenly and continuously. Then your out let of secondary crusher is carried into tertiary crusher, in which iron ore is going to bewhich is quite fit for the next beneficiation process. Iron ore beneficiation process is used increase the purity to 59% or even more. Iron ore beneficiation process is very important.

Hongxing Company lays much emphasis on the quality and clients. We serve clients with the quality guideline of being responsible for every working procedure, every product and every client. What we have done is for the clients and we believe that quality is the best way to develop market. The persistent operating theory of Hongxing is: the development way depends on the concept and the good product comes out of the good faith. We have been awarded the 'Civilized Enterprise' 'Key Enterprise' 'Enterprise with Standard Quality' and 'Enterprise with Honesty and Credit Standing'. We firmly believe that we can get sincere repayment with our sincere dedication.

29-12-2011 om 07:49 geschreven door annazhao356  

The process of mining from discovery of an ore body through extraction of minerals and finally to returning the land to its natural state consists of several distinct steps. The first is discovery of the ore body, which is carried out through prospecting or exploration to find and then define the extent, location and value of the ore body. This leads to a mathematical resource estimation to estimate the size and grade of the deposit.

This estimation is used to conduct a pre-feasibility study to determine the theoretical economics of the ore deposit. This identifies, early on, whether further investment in estimation and engineering studies is warranted and identifies key risks and areas for further work. The next step is to conduct a feasibility study to evaluate the financial viability, technical and financial risks and robustness of the project.

This is when the mining company makes the decision to develop the mine or to walk away from the project. This includes mine planning to evaluate the economically recoverable portion of the deposit, the metallurgy and ore recoverability, marketability and payability of the ore concentrates, engineering concerns, milling and infrastructure costs, finance and equity requirements and an analysis of the proposed mine from the initial excavation all the way through to reclamation. The proportion of a deposit that is economically recoverable is dependent on the enrichment factor of the ore in the area.

Of course, in the process of mining, mining machinery such as jaw crusher, impact crusher, crane, belt conveyor are necessary. Once the analysis determines a given ore body is worth recovering, development begins to create access to the ore body. The mine buildings and processing plants are built and any necessary equipment is obtained. The operation of the mine to recover the ore begins and continues as long as the company operating the mine finds it economical to do so. Once all the ore that the mine can produce profitably is recovered, reclamation begins to make the land used by the mine suitable for future use.

29-12-2011 om 07:48 geschreven door annazhao356  

Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or (coal) seam. The term also includes the removal of soil. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock salt and potash. Any material that cannot be grown through agricultural processes, or created artificially in a laboratory or factory, is usually mined. Mining in a wider sense comprises extraction of any non-renewable resource (e.g., petroleum, natural gas, or even water).

Mining of stone and metal has been done since pre-historic times. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials and finally reclamation of the land to prepare it for other uses once the mine is closed.

The nature of mining processes creates a potential negative impact on the environment both during the mining operations and for years after the mine is closed. This impact has led to most of the world's nations adopting regulations to moderate the negative effects of mining operations. Safety has long been a concern as well, though modern practices have improved safety in mines significantly.

Since the beginning of civilization, people have used stone, ceramics and, later, metals found on or close to the Earth's surface. These were used to manufacture early tools and weapons, for example, high quality flint found in northern France and southern England was used to create flint tools. Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries. The mines at Grimes Graves are especially famous, and like most other flint mines, are Neolithic in origin (ca 4000 BC-ca 3000 BC). Other hard rocks mined or collected for axes included the greenstone of the Langdale axe industry based in the English Lake District.

The oldest known mine on archaeological record is the 'Lion Cave' in Swaziland, which radiocarbon dating shows to be about 43,000 years old. At this site paleolithic humans mined hematite to make the red pigment ochre. Mines of a similar age in Hungary are believed to be sites where Neanderthals may have mined flint for weapons and tools.

29-12-2011 om 07:48 geschreven door annazhao356  

In the field of mining machinery industry, workers and mining equipment are the Soldiers and Weapons. The business field is just like a genteel battlefield.

There are certain widely used crushing machineries in mining sector; they may be jaw crusher cone crusher, vertical roller milland influence crusher and the like.

The cone crusher shares the exact same work principle with gyratory crusher; nevertheless, it could only be applied to medium broken or finely damaged crushing machinery which enjoys a greater uniformity with the basic operational requirement than coarse crushing, therefore, the bottom of the crushing cavity must be established on the parallel place, meanwhile, the cycle fee ought to also be speeded around make certain a over the moment extrusion of the materials in that parallel region.

The Jaw crusher, as one of many most frequently used crushing machinery, is utilized to crush or breake all sorts of difficult supplies by two jaw slabs with extruding and bending supplies. It is made up of the fixed jaw plate as well as the movable jaw plate, once they are shut to one another, the material will probably be damaged along with the pieces which are more compact compared to substance discharge mouth will be discharged from the bottom when the two plates are portion. This crushing movement is intermittent. Due to the benefits, this sort of as basic development, reliable to crush challenging content, jaw crusher has been far and widely utilised in mineral processing, development resources and silicate and ceramic industries etcetera.

The vertical impact crusher is apparently an excellent choice to crush and plastic soft or hard and very tough materials. It has been extensively used within a variety of ores, cement, refractories, alumina bauxite clinker, emery, glass uncooked components, mechanism developing sand, stone and a variety of metallurgical slag, in particular it's a better output successful in managing silicon carbide, emery, sintered bauxite, etc. of all these particular tough and super difficult and abrasive resistant materials than other forms of crusher.

By and large, the selected crushing machinery really should be the a single which may very best accommodate the doing work situations, only in that way, it could be manufactured full utilization of to accomplish an entire good results.

28-12-2011 om 03:50 geschreven door annazhao356  

The mining machinery refers for the gear that's utilised directly in this sort of operations as the mineral mining and beneficiation. It addresses a wide array which includes mining device, beneficiation machinery, crusher, dimension reduction machinery, grinding machine, washing machinery, screening machine, heading assembly utilized in mining, loading machine and some supporting devices. Generally talking, the exploratory machinery may be integrated to the genre of mining machinery. Additionally, a large number of crushers, ball mill, high efficiency dryerand conveyors are all applied into the whole process of the mining operations.

Such machines which are designed to execute the activity of crushing as crusher, crusher station, scissor-shaped crushing device and quartering hammer are all typically witnessed by us. The crushing devices can be used to refer to a lot of crushers like jaw crusher, hammer crusher, reaction crusher, influence crusher, cone crusher, roller crusher, plastic cracking device, double-roll crusher, gyratory crusher and compound crusher.

However, the acquainted dimensions reduction machinery involves the devices which can be applied in mining procedure. There are lots of these kinds of machines as mining-purpose grinder, ultrafine mill, the selective crusher, the wood-oriented crusher, mechanical crusher, jet mill and low-temperature mill.

With the further deepening of global economic construction, the manufacture market in mining machinery is viewing alterations in the modes of production and administration styles. However you'll find qualitative enhancements while in the creation scale, the financial capabilities, the product technological innovation and the amount of conduite, several problems such as the low independent innovation capacity, high reliance upon foreign fundamental components, backward technologies in high-end products and weak marketing advancement all stay to be solved. Now the competition is shifting through the region of price tag to that with the research in mining machinery. The trend inside the advancement of crusher and pulverizer for your industry of mining machinery is toward the orientation of large-scale advancement, digital intelligence and ecology-friendly surroundings and energy conservation.

28-12-2011 om 03:50 geschreven door annazhao356  

More and more businesses tend to decentralization at the lower influence on the financial market. In China, for example, predicted this phenomenon by initiating market-oriented reforms in the financial sector. It starts up a large number of banks and financial institutions in China to the financial sector expected to stimulate even an industrial sustainable growth.

It is obvious from a historical perspective to the economic functioning of markets is that the domestic market is functioning optimally and that the collaborative development areas are given the opportunity to exchange thoughts and ideas. We believe it crucial for a successful business concept is always primarily the responsibility of the owners of designated operations management to overcome these challenges as constraints of the budget for project funds or generally lower growth in economic activity. But we must also be aware of the underlying effects that government forces applied to instruments of national economies around the world.By successfully orients us right in the markets with the most optimal growth, we will succeed highlighted developments in subsequent periods, and we maintain a balanced growth in manufacturing and developing, thus competitive advantage, and the basic conditions for production and distributition in the future. The trade in the form of export that require our expertise and our competitiveness will thus always be available as a measure of economic growth. We have before us a great mission of establishing new production facilities for industrial designs in industrial metal construction.

It is a streamlined marketing that a commitment has a significant impact on sales and the sales volume ranks within the business. With a sales concept based in trading machinery, machine equipments and tools to the construction industries in very large markets. It is here we will establish the increase required for the optimal income level, and it is as well on these coordinational thoughts i would like to offer these opportunities for your cooperation to. Our board work in close interplay of the market communication to that make the desired impact possible and contributing to a larger sales volume. With the industry trend analytical instruments, we can focus sales efforts directly to the demand. The industrial demand, which has been mentioned by target-market product offerings may include mining, maintenance activities in infrastructure, forestry, agriculture, construction and real estate areas, etc.

28-12-2011 om 03:50 geschreven door annazhao356  

SYDNEY – Australia's Newcrest Mining , the world's third-largest gold producer, on Monday cut its full-year output guidance by around 6 percent, citing disruptions and lower grade ore at mines in Papua New Guinea and Australia.

Newcrest said it now expects to produce 2.43-million to 2.55-million ounces of gold in the 2011/12 financial year versus higher guidance in August.

Output in the quarter to Dec. 31 was likely to be between 575 000 and 585 000 oz, it also said.

The yield from the company's flagship Lihir Island mine in Papua New Guinea would fall 100 000 oz under budget in part because of heavy rains at the mine site, it said in a statement.

'It is unlikely this production will be recovered during the remainder of this financial year,' Newcrest said.

Production at its Telfer mine -- one of the biggest in Australia -- would fall short by about 50 000 t because the ore contained less gold than originally believed, according to the company

Another Australian mine, Cadia Valley, will lose 30,000 ounces because of ground slippage at the mine, made worse by rains, it said.

Full-year guidance for production of copper, mined as a by-product of gold, remained unchanged at 75 000 to 85 000 t, according to the company.

28-12-2011 om 03:49 geschreven door annazhao356