Granulators, or ring hammer mill, are composed of a shaft/hammer/disc assembly rotating at medium speed (300-720 rpm depending on diameter) within a breaker cage. Before your granulator was fully assembled, the folks in our factory balanced the rotor assembly on a static balance stand. But after extended service, the effects of wear on these things can cause problems such as vibration, hot bearings and unusual wear.

If Hammers are allowed to wear beyond their point of normal replacement, they can break and cause a serious vibration. Be sure to check the condition of all wear parts regularly, especially the rotating parts.

Another condition that can cause vibration is improper feeding. The best way to feed a granulator is to slide the material into the crusher along the breaker plate, and to avoid dropping material directly on the rotor. When the crusher mill is fed properly, wear will be uniform, resulting in longer hammer and disc life. We can advise you on ways to feed your crusher properly so that parts wear and maintenance down time are kept to a minimum.

Also take measurements of bearing temperatures. A hot-running bearing will go out of tolerance and eventually fail; this is most often caused either by deterioration of the grease or by using too much grease. Check your operation manual, or give us a call for advice.

06-12-2011 om 06:22 geschreven door annazhao356  

To improve the latest technology for our product and make the most elite product for our users, vipeak following tightly the development of the industry,especially introduced the most advanced DVT250X16/16 Q-NC type 2.5 M CNC double column vertical lathe, recently tested success in the east of zhongyuan road factory. The lathe will help the key parts of our crusher、grinding mill and sand making machine have a better precision of the production process,this marks our factory has into a new era of digital manufacture.

The numerical control operation parts, higher precision, technology more perfect, the product more outstanding. from it into our factory to the installation and commissioning, and then to the first try success , it is only cost 40 days.The leadership and related technical people fight night and day at the scene, makes every effort to the commissioning equipment optimization, let the equipment for product production should play a utility to produce a more accurate equipment to meet the needs of users.

The official opening of the digital equipment opened our factory production scale new glimpses, the vertical lathe operated by our experienced technology personnel who has many years in operating numerical control. at the beginning,Mainly used in the various types of cone crusher adjustment sets and HGM type three-ring micro powder loop of a bruised processing, the outsourcing before all into high precision production itself, greatly improved my factory for product quality and the processing cycle control ability.

The introduction of the high precision CNC double column vertical lathe have advanced structure complete function characteristics, realized the high efficiency、high precision、stable operation and reliable operation convenient production requirements, the main performance index reached the domestic leading level, its precision index reached the leading level of the world. the qualified rate of the finished products produced by this kind of high-end devices has beed greatly improved,but also further established the 'fashioning' role of our factory in the industry that match quility and excellent.

06-12-2011 om 06:22 geschreven door annazhao356  

As the main materials of concrete aggregate system, artificial sand and gravel aggregate are widely used in the high-speed railway, highway, municipal construction, hydropower projects.So the artifical sand making machine update constantly for the customers' requirments. Henan Hongxing Mining Machinery company developed a kind of highly efficient sand maker ,which introduce the new technology, promote the sand technology and infrastructure development.

From the early 1960s, traditional dry sand processing mathod had turned up in China.But the traditional technology have several fatal disadvantage,such as the poorly equipped,small production, dust hazard,big noise, environmental pollution and so on.They matched the high energy consumption and high costs but didn't solve the problem of environmental pollution. Henan Hongxing Machinery improved the first vetical impact crusher (PCL series sand making machine)and finished the world's advanced level high-performance sand making equipment – VSI type sand making machine, which is comprised of rotor, spindle, crushing chamber, motor, transmission, automatic control systems, lubrication systems, and steel and other components. And the main wear parts,example the rotor matrix, throwing hoppers, sub-feed pan, anvil , adopts wear and impact resistance alloy materials.All of them are provided with the long life and easy replacement. The crush form is divided into 'rock on rock' and 'rock on iron'.According to material compressive strength, abradability,there are four working forms: central with cascade feeding 'rock on rock' and rock on iron'; central feeding 'rock on rock'and 'rock on iron'.

In conclusion,VSI Type sand maker is the international advanced level of the new generation of energy-saving, efficient crusher. It is suitable for brittle materials with Mohs hardness under nine, not suitable for viscous material and rock with much dirt.

06-12-2011 om 06:22 geschreven door annazhao356  

For China mining machinery industry, the 1990s is the most difficult period. Only after 1999, it began to recover and ushered a new developmental opportunity. However, at present its technological base is still weak. Experts suggest that China mining machinery industry should seize opportunities to accelerate development through research and technical innovation.

There are two major problems for China mining machinery industry. First, the overall strength of mining machinery industry is not strong and could not meet high-standard requirements. Second, there are a lot of problems in product variety, technology, quality and service. Take the metallurgical and mining as an example. Currently there are 1180 kinds of equipments used in China, but only 26 percent are self-sufficient and the remaining 74% still need to import.

To enhance this, experts propose certain approaches to increase innovation. First, mining machinery manufacturing industry should establish different kinds of cooperation with foreign companies and professional design institutes and introduce technology and talents. Second, establish professional application laboratories to research product and applied technology of manufacturing process. Third, institutions of higher learning are not only the talent base, but also the origin of its basic theory and experimental research.

06-12-2011 om 06:21 geschreven door annazhao356  

During the 12th Five Year’s Plan, China government will increase investment on High-speed Railway and subway infrastructure construction. Under this background in China, mining industry will meet with a good opportunity to make them stronger.

1-8months in last year, the machinery industry completed a total industry output value of 8.9 trillion Yuan, an increase of 35.31% higher than the same period last year, and its 12 sub-sectors manufacturing showed great growth. According to statistics, the sales of construction machinery industry in China will reach 900 billion Yuan by 2015, the annual average growth rate of exports accounted for 17% about 20 billion USD dollars, which is becoming the first truly major exporter of construction and mining industry.

Henan Hongxing machinery will seize this right moment and make more contribution to the development of our economic and people living standard. These years, Hongxing sand making machine-PCL series vertical shaft vertical impact crusher, PE series jaw crusher and excavator are commonly used at home and abroad. Hongxing staff feels it is a great honor for them to participate in this infrastructure construction movement, seeing most of their equipments can be used in road construction, buildings, water and electricity construction, they are happy to provide more good quality equipments to all the users.

06-12-2011 om 06:21 geschreven door annazhao356  

In recent years, 'Go West' has made many significant achievements, a number of key projects have been already in operation orcompleted, at the same time, the western infrastructure, ecological environmenthas undergone tremendous changes. 2011 is the first year of “twelve five”period, and the new beginning of the western development strategy layout, whichis clearly an opportunity and a challenge for the Chinese construction machinery enterprises.

'Twelve Five' period, particularly in the west inXinjiang, Tibet and other remote areas will be doomed to the next battlefield forconstruction machinery industry, a large number of key projects in westernregions started intensive, and the western intensification of industrializationand urbanization, along with a variety of needs increase, it will surely attract the attention of domestic and foreign construction machineryenterprises. In addition, rich energy in western region is being untapped. Focuson on the Western construction will be the new trend for construction machineryindustry. Recently several major construction machinery industry giants, such as Xugong, 31, Liugong Group, have forward west, and make their contribution tothe western development.

As the famous mining machinery brand of China, Hongxing will supply the advanced mining plants for the western construction. Now HXJQ has sold out their stationary typecrushing plats and mobile crushing station to over 100 countries and make the significant dedication for the local construction. All the plants get ISO 9001:2000 and CE certificate.

06-12-2011 om 06:21 geschreven door annazhao356  

1. Before operation and maintenance of equipment, Be sure you have known well about the Instruction Manual and the Safety Operation Rules before operation; Make sure that if any accident occurs, you know how to stop the machines.

2.The qualified parts and the right tools should be used when maintaining the equipments.

3.. All the equipments and motors should be off in the process of maintenance. And the obvious notice should be shown on the machine.

4. All the equipments and motors should be off in the process of maintenance. And the obvious notice should be shown on the machine.

5. Don’t lubricate, clean, repair or maintain machine while it is working and operating.

6. Don’t operate switches and valves with dangerous tags

7. Don’t remove dangerous logo unless be authorized by responsible person whose name should be put on record.

8. Only qualified workers are allowed to do the following:

1) Operate a crane and lifting equipment.

2) Lifting load

3) Arc welding and gas cutting

4) Grinding

06-12-2011 om 06:21 geschreven door annazhao356  

With the scale expanding, our company has introduced many new employees .they start doing routine work after basic training., but in order to provide better serive for customers and make our company run on more stable development, we have a further specialized training with our staff ,which is directed to different departments and different position. And it is aslo to meet the sustainable development of human resources with our company.

In our company, the staff of online service is the first one who contact with customer, so in order to make our customers to enjoy high-quality, professional services, and know more detailed information and professional knowledge about our product, our company decide to hold a professional training with online service in the electronic commerce department firstly.

There are two main blocks of the training with online service, they are in-depth learh with product knowledge and experience of communication,service. Because we mainly produce all kinds of stone crusher and grinding mill and so on , our manager and engineer choice some frequently-used machine to explain,for example jaw crusher, impact crusher and our patent product HGM series of three-rings and medium-speed micro powder grinder and so on. Meanwhile, our manager pass on his experience of communication too.That's for better understand between our online service with custome.

We believer that our company can do better in the mining machinery industry. All of our staff will bocome very specialized after a series of specialized training. We can provide you not only high-quality product but aslo omnibearing service. Our aim is make all of customes feel satisfied.

06-12-2011 om 06:20 geschreven door annazhao356  

This work studied the current progress in ultra micro-crushing, and proposed a new model of ultra-high pressure crusher. This new model will fulfill the need for ultra high pressure crusher technology, realize the auto control of ultra-high pressure crusher and developed the supervisory control software.

First, we made some modification to over come some defects of conventional ultra-high pressure crusher. We designed a new type ultra-high pressure crusher with oil hydraulic pressure. It employs by turns work of two pistons to add pressure to material and reduce pressure fluctuant. The local control system was developed based the designed ultra-high pressure crusher. It employs PLC as central control, collect system information by transducer and keep the stability of system pressure by adjusting the sequence of the pistons. This helps to realize the automatc control of ultra-high pressure crusher. This machine can be operated both manually when adjusting the equipment and automatically during routine work.

Supervisory control software was compiled with vc, thus realize the remote monitoring of the machine. With the system real-time pressure value collected by a pressure sensor, this system collects signals to supervisory control computer, in whicb the pressure is described with dynamic curves and the real-time information of pressure is stored into access database. The ultra-high pressure crusher with PLC and supervisory controlling is able to work stable under the working pressure as high as 200MPa.

06-12-2011 om 06:20 geschreven door annazhao356  

The mesh shape directly influences the effective area of the screen. The effective area, also called effective screen surface, refers to the ratio between the sieve mesh area and the geometric area of the screen surface. The larger the screen effective area is, the more screen meshes there will be on the unit screen surface, and meanwhile the bigger probability of materials passing through the screen mesh there will be. Thus, the production capacity and the screening efficiency will be higher.

In the screening operations, the commonly used mesh shapes include round, square and rectangle. The sieve mesh of the perforated screen surface is round, while the woven screen surface is with rectangular hole and square hole. Practice has proved that screen surface with different mesh shapes has different effective screen surface areas, and at the same time the probability of mineral grains passing through the screen mesh is different as well. In general, the rectangular screen mesh has the biggest effective area followed successively by square mesh and round mesh. Therefore, the productive capacity of unit screen surface area becomes smaller according to the above order. One of the rectangular mesh’s advantages is that the sieve mesh is difficult for clogging.

Finally, the mesh shapes should match the shapes of the materials. Generally speaking, the lump materials should adopt the square hole, while the plate materials should select the rectangular hole. The mesh size and grain size are determined according to the following formula: dmax=ka.

05-12-2011 om 05:22 geschreven door annazhao356  

Exactly speaking, the mobile crusher should be referred to as mobile crushing plant, as it is equipped with discharge device and some other ancillary facilities besides crushers. According to different mobile functions, the mobile crushing plant can be classified into fully-mobile type, semi-mobile type and portable type. The three types of mobile crushing plant have different working conditions.

The fully-mobile crushing plant can also be called self-propelled crushing plant. In accordance with different moving modes, it can be divided into crawler type, rubber-tyred type and walking type. The flexibility degrees are different for the three types of moving modes. Thus, they have different uses. Generally speaking, the crawler type mobile crushing plant can work in coordination with excavators. However, it is restricted by the heavy machine body, so it has a relatively small processing capacity. Currently, its largest known capacity is 1000t/h. The rubber-tyred type and the walking type can only work under relatively fixed conditions. Unlike the crawler type mobile crushing plant, they can not work in coordination with excavators. However, they have large processing capacity, which can reach up to 2000-3000t/h.

The semi-mobile crushing plant can move by means of some external forces. Material feeding and discharging can be completed on the same platform for some semi-mobile crushers, while some can not. At present, the largest semi-mobile crushing plant in the world is found in a copper ore of Chile, whose processing capacity has reached up to 9600t/h. Basically speaking, the semi-mobile crushing plant is elevated on the ground dispensing with solid concrete foundation. Therefore, it can be uses as long as the carrying capacity to the ground is not less than 250KPa.

The portable crusher plant, also known as modular crushing plant, is a kind of structure between the fixed crushing plant and mobile crushing plant. It can be disassembled into several parts. Its size and weight are in line with the crane’s lifting capacity and the trailer’s bearing capacity. The time it takes to relocate the portable crushing plant depends on the preparation, disassembling degree, and relocation distance, etc.

05-12-2011 om 05:21 geschreven door annazhao356  

The selection of crushers for cement plant should take into consideration the following factors raw materials’ hardness (generally represented by the compressive strength), corrosivity (usually described with free quartz content), and viscosity (water content, and clay content). In accordance with the above information, you can make a choice.

Selection Criteria of stone Crushers:

Crusher TypeMax. Crushing RatioCompressive StrengthQuartz Content(％)moisture content(％)

Single stage hammer crusher1100＜150≤8＜10

Biaxial hammer crusher1100＜150≤8＜15~20

Impact crusher120＜175≤12＜8

Jaw crusher15＞150~400＞15＜5

Cone crusher15＞150~400＞15＜5

The requirements on limestone crushing are relatively high. After being processed, the particle sizes can reach 0~25/80mm. The crushing processes should be reduced to the greatest extent, so that the one-time investment and maintenance costs can be reduces. The hammer crusher or impact crusher with high crushing ratio can meet the requirements for single stage crushing, but the quartz content should be less than 8%-12%. In terms of the impact crusher, the water content of the materials should be less than 8%. On the part of the biaxial hammer crusher, the water content can reach up to 20%, and limestone and clay can be fed at the same time.

If the quartz content and water content are so high that hammer crusher or impact crusher cannot be used, two-phase crushing system should be adopted. In general, the double roller crusher, roll sizer, jaw crusher as well as cone crusher are suitable for the two-phase crushing system for abrasive materials. Their crushing ratios are much the same (about 15-16), but their adaptive capacity to hard or wet materials is quite different. The jaw crusher and cone crusher crush the materials by means of high pressure, and they can handle hard rocks with compressive strength up to 400Mpa. The double roller crusher and roll sizer are influenced by shear and pull force, and they are only suitable for crushing materials with compressive strength less than 175MPa. However, they can process materials with high viscosity and corrosiveness.

05-12-2011 om 05:21 geschreven door annazhao356  

Graniteis a common and widely used type of intrusive, felsic, igneous rock. Granites usually have a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the ground mass, in which case the texture is known asporphyritic. A granitic rock with a porphyritic texture is sometimes known as porphyry.Granites can be pink to gray in color, depending on their chemistry and mineralogy. By definition, granite is an igneous rock with at least 20% quartzby volume. Granite differs from granodiorite in that at least 35% of the feldspar in granite is alkali feldspar as opposed to plagioclase; it is thealkali feldspar that gives much granite a distinctive pink color.

Out crops of granite tend to form tors and rounded massifs. Granites sometimes occur incircular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels. Granite is usually found in the continental plates of the Earth’s crust.

Henan Hongxing Mining Machinery provides granite crushing machine, and our product plays an important role in the mining of granite. Granites usually have a medium- tocoarse-grained texture. Its compressive strength usually lies above 200 MPa. We usually take Jaw Crusher and Impact Crusher as the primary crusher because ituses the “stone strike stone” technology can raise the effect and save the powder. Cone Crusher is the best choice as the second crusher.

Aggregate processing includes crushing, screening, and cleansing the aggregate to acquire proper cleanliness and size. If necessary, benefaction process for example jigging or heavy media separation can be used to upgrade the standard.

05-12-2011 om 05:21 geschreven door annazhao356  

In mining industry, crusher is usually used for crushing raw materials, with more than 8 mm thick. Crusher can be divided into primary crusher and fine crusher. Generally speaking, the processed materials can be 0.074 mm thick, or even smaller. The process is use outside force to crusher bigger materials into smaller.

In cement production, most of the materials need to crusher. Limestone takes a large proportion in cement processing, and has high hardness and large particles, so it also need to be processed by crusher. Jaw crusher, impact crusher, shaft impact crusher, and hammer crusher, they all widely used in cement plant.

As fast development of the society, the mounts of crushing material is increasing heavily, crusher plays more and more important role in our national economy.

Henan Hongxing Mining Machinery Co., Ltd has designed and manufactured a large amount of various crushers, a series of new rock-crushing equipment, which largely expands the concept domain of coarse crushing and fine crushing, such as PE/PEX jaw crusher, vertical impact crusher, hydraulic cone crusher, mobile crushing station. It has successfully removed the obstacle that crushing site, environment and complex infrastructure. HXJQ has made great contribution in cement industry, and we will always on the way!

As fast development of the society, the mounts of crushing material is increasing heavily, crusher plays more and more important role in our national economy.

05-12-2011 om 05:20 geschreven door annazhao356  

Nowadays, the increasing rate in China has already been more than 10% while the increasing speed of the construction waste all over the world is 8.42% every year. The global construction waste is about 490 million ton; whereas China is about 150 million ton. The municipal solid waste in China has piled about 7 billion ton. Such great pressure from the construction waste, we believe that waste disposal will become the major industry in the future. Especially the recycling of construction waste, because it can bring more economic benefits, so it is inevitable to become the important part in the waste disposal industry.

Construction waste disposal is the process of planning and implementing the handling and disposal of building materials on a construction site. Research, training, and development of a construction waste disposal plan are integral parts of this process. It involves applying the conservation hierarchy: reduce, reuse, and recycle to construction materials and methods.

At present, the building demolition debris (the waste produces in the course of constructing, renovating, and demolishing buildings) accounts reach 30%-40% of the total municipal waste. This debris is composed of excess building materials that contain valuable resources and embodied energy from their production and transportation to the jobsite. Both architects and contractors can greatly impact the amount of construction waste generated on the site. Once materials have been consigned to the landfill, these resources are virtually impossible to recover. Recognizing and fully utilizing building materials’ value is the foundation of construction waste disposal.

Henan Hongxing Mining Machiney Co., Ltd. develops many new generations of machines, movable crushing plant, energy saving cone ball mill, high efficiency micro-powder grinder, ultra-fine Raymond mill relying on the features of construction waste. This equipment solves effectively the problem about the recycling of construction waste. Thus it brings the more economic benefits and realizes the maximum of resource utilization.

05-12-2011 om 05:20 geschreven door annazhao356  

After 20 years' development, the drying equipment industry in China has formed a certain number of enterprises and production scale. From the regional distribution of the manufacturers, the number of the east part is more than that of the middle and western part; especially in the Jiangsu, Zhejiang, Shanghai the enterprise is relatively concentrated, only in Changzhou City of Jiangsu Province, the number of the drying equipment production enterprise has been more than 50. The current conventional drying equipment in the domestic market as well as the main drying equipment in the international market, we basically can have its own manufacturing in our country, which suggests that, the importing history of the drying equipment of China has come to an end. But there are still some problems and secret worry.

The concentrating distribution of the enterprise

The producing enterprise of drying equipment industry in China mostly gradually derive from the early enterprises of the industry, the geographical location is relatively centered and the personnel structure exists serious defect. So far, the enterprise is mainly distributed in the Jiangsu, Zhejiang, Shanghai, Liaoning, Heilongjiang, the enterprise of this several area businesses is accounted for almost 50% of the total number of entire industry, what forms the sharp contrast with which is that there are still areas without drying equipment production enterprises. The industry competition is fierce, some enterprises focus on the immediate interests, which severely hamper the normal development of the industry.

Technology development capability not strong

Since the reform and opening up, especially in recent years, China's economic growth potential have been effectively release, the relationship between supply and demand by the shortage economy produces a fundamental change, buyer's market preliminary formed. In the pressure of buyer's market, some enterprises are after market rather than to seek and explore the market, and the enterprises focus on the products in more market demand or the developed recently. Therefore manufacturers are more concentrated in oven, vibration fluidized bed, spray dryer and other common products and the competition is unusually intense. We should to research and develop new products to change the status quo.

05-12-2011 om 05:19 geschreven door annazhao356  

In recent years, with excess capacity and homogeneity intensifies in China's crusher industry, which increased competition in the market .Some companies began to adopt some irrational promotions from buy product draw large domestic appliances to get prizes such as cars, small breakers until the introduction of mortgage purchase zero first-pay promotional measures.

Irrational promotions for these phenomena, it is clear that is incorrect. It is unfortunate, crushing machine industry has now caught in a vicious circle: obviously people cry 'zero down payment', but a lot of enterprises on the use of such means. First of all, there are only some small enterprises to participate in, and later even the large well-known companies are involved, promotional products from certain categories of aircraft gradually spreading to more machines. Or even exclude some enterprises while shouting slogans against unfair competition, but side with others to follow use such means.

In fact, this phenomenon is not hard to understand in the vital interests of the real face of market share. Few companies are able to self-discipline truly. In fact, we all know that trade associations are not much binding to enterprises. Moreover, our law does not require enterprises which are not allowed to implement a zero down payment . In a market economy , naturally has its set of rules of the game .

Now , China crusher(jaw crusher) market opportunities have emerged , 'tiger ' will come here. Tiger said here ,including the macroeconomic slowdown , tightening of monetary policy , tough credit environment, including market advances , the adverse situation of excess capacity ,rising raw material prices increasingly, labor costs ,as well as emerging problem of adverse market order. Due to these 'tiger' catch-up,in the crusher industry more than a hundred Chinese Original Equipment Manufacturers and component manufacturers have started a super- scale long-distance race. It is the the competition between enterprises has become not only the competition between product quality, But also the competition for technology, markets, capital technology , services ,marketing channels, R & D capabilities , and many other elements.

We want to ensure that our customers' crusher equipment safe and efficient production . At the same time ,the way to humane high- service brings a large number of customer loyalty , actively strengthen of determination China crusher .

05-12-2011 om 05:19 geschreven door annazhao356  

In recent years, with excess capacity and homogeneity intensifies in China's crusher industry, which increased competition in the market. Some companies began to adopt some irrational promotions from buy product draw large domestic appliances to get prizes such as cars, small breakers until the introduction of mortgage purchase zero first-pay promotional measures.

Irrational promotions for these phenomena, it is clear that is incorrect. It is unfortunate, crushing machine industry(jaw crusher, impact crusher, cone crusher) has now caught in a vicious circle: obviously people cry 'zero down payment', but a lot of enterprises on the use of such means. First of all, there are only some small enterprises to participate in, and later even the large well-known companies are involved, promotional products from certain categories of aircraft gradually spreading to more machines. Or even exclude some enterprises while shouting slogans against unfair competition, but side with others to follow use such means.

In fact, this phenomenon is not hard to understand in the vital interests of the real face of market share. Few companies are able to self-discipline truly. In fact, we all know that trade associations are not much binding to enterprises. Moreover, our law does not require enterprises which are not allowed to implement a zero down payment . In a market economy , naturally has its set of rules of the game .

Now , China crusher(hammer crusher, roll crusher) market opportunities have emerged , 'tiger ' will come here. Tiger said here ,including the macroeconomic slowdown , tightening of monetary policy , tough credit environment, including market advances , the adverse situation of excess capacity ,rising raw material prices increasingly, labor costs ,as well as emerging problem of adverse market order. Due to these 'tiger' catch-up,in the crusher industry more than a hundred Chinese Original Equipment Manufacturers and component manufacturers have started a super- scale long-distance race. It is the the competition between enterprises has become not only the competition between product quality, But also the competition for technology, markets, capital technology , services ,marketing channels, R & D capabilities , and many other elements.

We want to ensure that our customers' crusher equipment(combination crusher, mobile crushing station) safe and efficient production . At the same time ,the way to humane high-service brings a large number of customer loyalty , actively strengthen of determination China crusher.

05-12-2011 om 05:18 geschreven door annazhao356  

After making sure of reserves by geological prospecting department, firstly make a fixable study about ore bed mining to solve the problems that whether the ore deposit has value and meet the requirements of industrial mining. Feasibility study should include grade of ore, reserves, bury condition, difficulty level of comprehensive dealing with ores, market demand condition and mining method. According to primary feasibility study, finish complete feasible report and make sure mining method.

In general, there are three types of mining methods: complete underground mining, upper open-pit mining, underpart underground mining. As for the latter two conditions, primary design for open pit mining is necessary which should be conducted on the basis of necessary geological information to finish the following work: ensure the condition of open pit mining, check productivity of open ore, decide the mining method of strip mining as well as delivery way of waste rock and arrangement of wines and choose machines' types and number for punch, explosion, mining, delivery and soil discharge. Arrange ground industrial site, ensure area and time of purchasing land, number and working-day of roads and civil construction program, count number of workers, electricity, water and main materials.

Furthermore, it's important to choose proper equipment for open-pit mining. We Henan Hongxing provides various types of high quality machines, jaw crusher, vertical impact crusher, hydraulic cone crusher, movable crushing station and so on. Good weapon is the key to succeed.

Make basic construction progress plan of mine and count technical and economic index, such as the total amount of mine program and total investment. After the primary design is agreed by investors, make out construction design for each program and lastly get into mining.

02-12-2011 om 08:15 geschreven door annazhao356  

Crushability factor and grindability factor of ores reflect hardness of crushing and grinding of ores. If adopt the same crushing machine under the same condition to deal with hard ores and soft ores, the former has low productivity, and large power dissipation. Thus, the factor reflects the hardness of ores and can also be used for measuring the craft index of crushing ores and grinding machines quantitively. It is used widely.

The representation of crushability factor and grindability factor is as following:

Crushability/grindability factor=the productivity of the crushing machine that crushes/grinds (jaw crusher, impact crusher, ball mill, rod mill) certain ores under the same condition/the productivity of a crushing/grindingmachine (cone crusher, Raymond mill) that crushes/grinds (roll crusher, cone ball mill) medium hard ores.

Quartz is always considered as standard medium hard ore and a compare standard and its crushability factor and grindability factor is defined as 1. Crushability factor and grindability factor of hard ores is lower than 1 while that of soft ores is higher than 1.

02-12-2011 om 08:15 geschreven door annazhao356