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  

Nowadays, there mainly are cone crusher, jaw crusher, impact crusher and sand making machine for making sandstone in water conservancy project. Gyratory crusher and cone crusher are heavy equipment, needing huge investment size; materials after crushing by jaw crusher has high content of needle flake with severely destroyed structure; Vertical shaft sand maker has limited feeding granularity and small crushing ratio; rod mill is more fit for wet method. All of the following types of machines can not satisfy technology and economy demanding of asphalt concrete mineral aggregate crushing. So it is an effective way to study mineral crushing craft composed by impact crusher and vertical impact crusher.

From crusher working principle and its actual using condition, impact crusher and vertical impact crusher are both mature type, having impact crushing function as well as grinding function with big crushing ratio, small damage on skeleton structure and high efficiency as well as good granularity and directly controllable grain size, which are normally used in crushing limestone. The former one has a vast application in each stage of water conservancy and Building and Decorative Materials as well as Metallurgy industry in which can clearly drop needle flake content. The latter one is a mature product in abroad with vast application. In recent years, our country develops this type machine, mainly for ore crushing in cement factory. It is also very successful in the application of water conservancy with outstanding feature of fitting for producing fine well-shaped materials.

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

In recent years, there are various price increase, such as iron ore, house price, petro oil. For the house price of China is abnormally high for hundreds of millions of ordinary people, and which is overburdened for them to purchase, they only have to sigh deeply with the price and have nothing else to do. With the rapid development of economy and the process of urbanization and industrialization, the investment to infrastructure , such as road, railway, and water conservancy will be increased, which will leads to the rigid demand to mining machinery, for example, jaw crusher, impact crusher, belt conveyor, stone crusher. Meanwhile, more housing construction will directly stimulate the development and expansion of ball mill market.

It is generally acknowledged by the industry insiders that at the peak moment of real estate, wholesale building concrete is needed, and considering the full use of energy source and environmental protection, it is really very troublesome. While the application of aerated concrete relieves this condition, for the raw material of this comes from coal ash, sand dust, coal gangue, and waste residue. Ball mill is not only the indispensable production facility in cement, mine, metallurgy and ceramics, but also the fine grinding machinery in industrial production.

It is ore grinding equipment that use steel ball to work as ore grinding medium, is the key equipment for recrushing after the material was crushed. Ball mill has many types, such as cement ball mill, energy-saving ball mill, ceramic ball mill, intermittence ball mill and so on. They are used for the grinding of lime, gypsum, sand and slag. The grinding process is high power consumption, and ball mill is the essential department in aerated concrete equipment. The building industry promotes the development of aerated concrete industry, as well as stimulates the widely use of ball mill.

Nowadays, China sticks to the sustainable development of 'reduce, reuse, and recycle'. So PE jaw crusher, hydraulic cone crusher, high efficiency concentrator appear We can see that, the government-led, business-oriented, and community-wide participated energy conservation pattern is gradually formed in China. Energy conservation is not only the urgent pursuit of the development of industry, but also related to people's livelihood. With the technology development of ball mill, its environmental protection and economical efficiency is getting more and more attention. Henan Hongxing designs and produces enery saving cone ball mill, high-efficiency micro powder making machine. Therefore, only the continuous energy conservation and innovation can realize the permanent development of ball mill.

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

The professional crushers in mining machinery can be classified into: jaw crusher, hammer crusher, compound crusher, roll crusher, impact crusher, cone crusher, and shaft impact crusher, etc.

1). Jaw crusher: jaw crusher is characterized by its big crushing ratio, even granule, plain structure, reliable operation, easy maintenance, and convenient delivery.

2). Hammer crusher: (ring hammer) is called hammer broken for short, and mainly applied for crushing all kinds of fragile material, such as coal, salt, gypsum, alum, brick-tile, and limestone, etc.

3). Impact crusher: is applied for crushing hard material, such as the crushing of limestone in cement plant, and is characterized by high productivity and small particle size.

4). Compound crusher: is suitable for crushing limestone, clinker, coal and other mineral materials in building materials, mining industry, and chemical industry. The characters are: high production capacity, big crushing ratio, low energy consumption, steady operation, and convenient maintenance.

5). Roll crusher: also called roll crushing mill, is mainly for crushing medium hardness ore and rocks in the areas of beneficiation, chemistry, cement, and building materials.

6). Shaft impact crusher: also called sand making machine, is widely used for the intermediate crushing and fine crushing of hard and fragile abrasive, fireproofing, cement clinker, iron ore, and aggregate. The PCL series shaft impact crusher is also suitable for the use of sand in construction and paving road.

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

Impact crusher is also called sand making machine. For sand production line, impact crusher, jaw crusher, vibrating screen, belt conveyor are the main equipment. The working environment of sand making machine equipment leads to the rusting of sand making machine, which is a normal chemical reaction. When the machine is placed in the air for a long time, it will be easy to get rusty. The working environment of sand making machine is generally quite poor, it is likely to get rusty and affect the production quality. So how to maintain and correctly operate the sand making machine equipment is becoming more and more important. How to deal with the process? Hongxing gives you some workable ways.

1) Chemical derusting: mainly by the chemical reaction between acid and metallic oxides and thus remove the rust corrosion on the metal surface, which is known as pickling rust, and can only be operated in the workshop.

2) Small-sized pneumatic or electric derusting: electricity or compressed air is worked as driving force and equipped with suitable derusting device for reciprocating or rotary movement to meet the derusting requirements of a variety of occasions. For example, the angel grinder and wire brush which belong to semi-mechanized equipment are very light and handy, and of great mobility. They can completely derust but can not achieve high qualified surface treatment.

3) High-pressure water abrasive derusting: by the impact of high-pressure water jet (plus the grinding effect of abrasive), the prized role of water damage and corrosion and the coating's adhesion on the plate shelves. Its characteristics are: no dust pollution, no damage to steel and high derusting efficiency.

4) Daubing anti-oxidation paint derusting: daubing mineral oil, paint or enamel on the surface of ironwork, or plating a layer of metal such as zinc, tin, chrome, etc by electroplating or hot dip. The surface of these metals can form a dense sull that can prevent contacting with water, air and other materials.

We are the professional manufacturer of stone crushing line, sand making equipment, ore dressing equipment. Our crushers, ball mills, rod mills, magnetic separators have all passed ISO9001:2000.

02-12-2011 om 08:14 geschreven door annazhao356  

With the rapid development of mining machinery industry, and the increased demands of our country to the use of resources, energy conservation, and environmental protection, high-tech mining machinery and equipment will usher in their splendid development. Mining machinery, especially crusher, is a kind of important equipment for industrial raw materials and energy production. Improving its efficiency is the key point for the conservation of resource and energy.

With the large number of small coal mines, small metallurgy, cement enterprises were shut down, the new large-scale concentrator; large coal preparation plant and the construction of a large cement plant have put forward higher requirements to mining machinery. The need for large capacity crushing and screening equipment, for high efficiency and reliable operation of equipment is urgent. The well-known manufacturer of mining machinery, Henan Hongxing Mining Machinery Co., Ltd. because of its excellent production of crushing and screening equipment, advanced technology and energy efficient features, the company has developed and manufactured many crushing and screening equipment, mobile crushing plant, jaw crusher, mobile crusher, impact crusher, floatation machine, sand making machines, sand production line, grinding mill, ball mill, etc. all of which are the hot focus of mining machinery, construction, roads, railways, metallurgy and other areas. The automatic, energy saving and efficient, large-scale crushing and screening equipment will be the highlighted research for crushing equipment manufacturers.

The crushing and screening equipment is very essential and necessary for the production of industrial raw material and energy. To improve its efficiency is the key link for resource and energy saving.

02-12-2011 om 08:14 geschreven door annazhao356  

'1025' period, China's economy will be strong up the development of construction machinery industry continued to provide important impetus to benefit from this, combined with business innovation and competitiveness on the rise, China's construction machinery industry will continue to remain high run. Expected in 2017, China's construction machinery industry will achieve 17 percent revenue growth, exports will increase by 25%, the export industry will be fully restored to the level before the international financial crisis. Expected to 'second Five', China's construction machinery sales will reach 900 billion yuan, exports will exceed $ 26 billion. With the speed, mining machinery industry will make greater progress, jaw crusher, impact crusher, ball mill, Raymond mill all have bright markets.

Experts believe that the impact on demand for construction machinery industry has three major policy force.

First, the housing projects is the construction machinery industry is one of the major driving force.

February 2011, the Department of Housing and Urban-Rural Development and the provinces, autonomous regions, municipalities and separately listed cities signed the 'affordable housing target of responsibility', to be completed this year, 10 million units of affordable housing construction tasks. According to the Ministry of Housing and Urban data, in 2010 the construction of affordable housing projects reached 5.8 million units, investment of more than 800 billion yuan. In 2011 the construction of affordable housing projects 10 million units, the new investment of more than 600 billion yuan. This calculation, the 2017 investment or affordable housing projects will reach 1.4 trillion yuan.

Second, the railway investment will exceed 3 trillion yuan, is also an important impetus for construction machinery. Especially recent years, road construction flourishes which pushes the sales of jaw crusher, excavator, stone crusher, crane.

China's comprehensive transportation system, 'five' special plan shows '1025' period will build 40,000 km rapid rail network is expected to '1025' period will reach 3.5 trillion yuan rail investment around.

Third, investment in water conservancy construction in the next 10 years will be 40,000 yuan, the construction machinery industry the third largest driving force.

Out of the 'three rural' development, energy conservation, and many other considerations, experts predict the next 10 years China's infrastructure investment in fixed assets will focus on rail, road transfer to the water conservancy construction.

January-April 2011 the fixed assets investment up 25.4%, which in April invested 291.151 billion yuan in fixed assets, an increase of 1.42%, changing the fixed asset investment growth slowdown, mainly in the tertiary industry increased by 26. 50% of road traffic in April increased by 23.60%, with further investment in water conservancy construction, but also bring new demand for construction machinery.

Rapid increase in size and quality at the same time, China's construction machinery enterprises in product, technology and innovation capability of continuous fast forward. Through innovation and introduction, digestion and absorption of advanced technology, a large number of leading technologies with independent intellectual property and products to market, especially in large, high-end, intelligent product research and development of construction machinery, construction machinery enterprises in China continue to achieved a major breakthrough, such as 2000 tons crawler crane 1600 ton crawler crane, 500 tons, 800 tons and 1,200 tons all terrain crane, 510-horsepower bulldozer, 12 tons loaders, 46 ton forklift, the fourth generation of road machinery, the long arm of the world's most concrete pump frame, the horizontal arm back to the world's largest rose D5200-240 transferred from tower cranes, etc. These products are not only a high level of China's equipment manufacturing industry representatives, but also broke the large and very large imports of construction machinery products situation.

Although China's construction machinery business all these years has made great progress, but whether it is in the level of technology, technological innovation and product-level and advanced foreign enterprises there is still a gap. In addition, we must clearly recognize that the key parts of construction machinery industry controlled by others, elements of the enterprise costs continue to rise, the order of competition within the industry is not standardized, will have a negative impact of construction machinery industry needs to accelerate the development and improvement. As to mining machinery industry, there are the bright future for stone crushers, belt conveyors, energy-saving cone ball mill, cone crusher, flotation machines and so on.

02-12-2011 om 08:14 geschreven door annazhao356  

In mining process, screen plays the unique role. There are vibrating screen, high efficiency vibrating screen. Generally speaking, the screening process can be defined as follows: Make broken materials of different particle sizes pass through the single-deck or multilayer screen surface with uniform screen mesh and then classify the materials into different levels of gradation. In theory, the particle sizes bigger than the sieve mesh are called screen overflow, while the particle sizes smaller than the sieve mesh are referred to as screen underflow.

The screening process of broken materials can be composed of two stages, that is, fine particles passing through the material layer formed by superfine particles and reaching the screen surface, and fine particles passing through the sieve mesh. If you want to complete the two stages mentioned above, the most fundamental condition required is that there should exist relative motion between the materials and the screen surface. Consequently, the screen box should be with corresponding motion characteristic. On the one hand, it can keep the material layer in loose condition, and on the other hand, it can help to remove the coarse particles stuck in the sieve mesh and meanwhile make the fine particles successively pass through the screen.

For one complete production line, there are jaw crusher, impact cruser, vibrating screen, vibrating feeder, ball mill, belt conveyor, flotation machine, concentrator and so on. All these production line equipment, we Hongxing Machinery can supply to you.

02-12-2011 om 08:06 geschreven door annazhao356  

As we know, impact crusher and hammer crusher both are the main equipment in stone production line. They have similarities and differences. As to the advanced technology, let's make a comparision.

The unique working principle of impact crusher overcomes the many defects of hammer crusher. At first, the discharging particles of impact crusher mainly are granular, while hammer crusher does maybe have much power. In addition, impact crusher can effectively deal those materials with moisture, thus it can reduce the jam phenomenon.

When the material contain much moisture, the feeding chute and impact board of impact crusher can be equipped with heating device, prevent the bond of material. And impact crusher don’t need equip with the bottom sieve plate, it just can effectively avoid the block phenomenon. However, hammer crusher can’t adopt heating way to prevent the bond of material, and need equip the bottom sieve plate, thus it just increase the possibilities of jam.

Impact crusher not only can apply on soft material, but also apply to the very large hardness material. The plate hammer of impact crusher adopts the mechanical firm structure and fixed to the rotor, thus when the rotor move, it has more rotator force. Relative to hammer crusher, the rotor of impact crusher has more momentum, suitable to crushing the more hard material and saving energy.

Impact crusher can adjust the discharging particle convenient, and the adjusting range is extensive. Impact crusher can adjust the discharging particle by so many ways, such as adjust rotor speed, impact plate and the space of grinding cavity, etc. the gap adjustment can be done through mechanical or hydraulic way, and hydraulic adjustment system can easy operate the button or long distance control system to accomplish the space adjustment. While impact crusher adjust the discharging particle only by changing bottom sieve plate.

Wear-resistant parts of impact crusher are so few compared with hammer crusher, and higher use ratio of metal.

The replacement of spare parts is so simple, thus the cost of maintenance will less. The impact crusher rotor just installed six plate hammers, and replacing a set of plate hammer just needs short time. And the replacement of bottom grinding cavity also need about ten minutes, and then which greatly reduce the cost of infection and maintenance. However, the hammer of hammer crusher has more than 100 pair; it will spend a lot of time and labor power to replace a set of hammer, the cost of inspection and maintenance is higher than impact crusher. Replacement of bottom sieve plate is also trouble.

In addition to impact crusher and hammer crusher, there are jaw crusher, cone crusher, roll crusher, sigle-stage roll crusher, mobile crushing plant. Facing different working circumstance, proper crushers can make greatest profits.

02-12-2011 om 08:01 geschreven door annazhao356