Simple Guidance For You In Different Types Of
Crushers’ Application Range
Different types of crushers
1. Jaw Crusher
Jaw crusher is one of our most common crusher equipment. It is also used as the primary crushing of stone, stone and sand production line, and occupies a certain position in the field of crushers. The machine has strong crushing capacity and high crushing force, and is suitable for crushing various stones and materials. It is mainly used for medium-sized crushing of various ores and bulk materials. The maximum compressive strength of the crushed materials is 320MPa. Among them, the large and medium-sized jaw crusher is the leading product of Sandrock Mining, which is currently in the leading position in China. It is widely used in mining, smelting, building materials, roads, railways, water conservancy and chemical industries and many other industries.
2. Cone Crusher
The cone crusher has been proved by many customers’ experiments that it has excellent particle size and shape, high productivity, less consumption of wear parts and low operating cost, and has been well received by customers. The machine also uses a hydraulic cavity cleaning system to reduce downtime. Cone crushers are widely used in mining, metallurgy, construction, road construction, chemical and silicate industries to crush various ores and rocks with medium and above hardness.
3. Impact Crusher
The impact crusher is used as the secondary crushing of the stone and stone production line. The machine has uniform discharge particle size, wide adaptability, high productivity, and low wear and consumption of the whole machine. It is also the most popular crusher equipment. It can handle materials (granite, limestone, concrete, etc.) with a particle size of not more than 500 mm and a compressive strength of not more than 320 MPa. With its excellent performance and good performance, the impact crusher is widely used in the production of high-grade road, hydropower, artificial sand and gravel, crushing, construction and other industries.
4. Compound Crusher
The compound crusher can be said to be a crusher with the strongest adaptability. It has a simple structure, is suitable for various materials, has no screen bars, has a large crushing ratio, and is energy-saving, and can crush materials containing more than 8% moisture. It can be widely used in the fine crushing of raw meal and clinker in cement plants, and can also be used for fine crushing of medium hardness materials such as dolomite, coke gemstone, lead-zinc ore, serpentine, blast furnace slag, coal gangue, phosphate rock, etc. It is especially suitable for the processing and crushing of artificial sand such as hard limestone, dolomite, granite, basalt, or highway pavement stones.
5. Hammer Crusher
The overall design of the hammer crusher is beautiful in appearance, simple in structure and convenient in maintenance. Hammer crusher is suitable for crushing medium hardness materials, such as limestone, slag, coke, coal and other materials in the cement, chemical, electric power, metallurgy and other industrial sectors for medium and fine crushing operations. In addition, hammer crusher can not only be used in crushing production line, sand making production line, but also can replace cone crusher in mineral processing production line.
How many stages are there in crushing operation?
In the crushing process, in order to avoid over crushing and reduce costs, the principle of “more crushing and less grinding” should be followed. For the crushing of large particle size ore, it must be carried out section by section. In concentrators, two-stage or three-stage crushing is generally used. According to the different particle size of the crushed product, it can be roughly divided into three stages: coarse crushing, medium crushing and fine crushing.
Basic concepts and principles of crushers
1. Crushing
Under the action of external force, the solid material overcomes the cohesive force, and the process of crushing the solid material is called pulverization.
The method of applying external force can be manpower, mechanical force, electricity or blasting etc. Most of the quarrying in mines adopts the blasting method, and most of the crushing of the large block materials into small ones adopts the mechanical method.
Along with the pulverization progresses, the total surface area of the material continues to increase. Therefore, after the solid material is broken into small pieces or fine powder, the reaction speed of physical and chemical action can be improved. In addition, the mixing of several different solid materials must also be in the state of fine powder to obtain a uniform effect.
In cement plants, a large amount of solid raw materials, fuels and semi-finished products need to be crushed. Producing each 1 ton cement needs to crusher about 4 tons material, and the electricity cost for crushing is about 70% of the total electricity cost. At the same time, the crushing operation is also directly related to the product quality. It can be seen that crushing is a very important operation process.
The raw materials input to the factory range from fine to powder to as large as a block over 1 meter. The raw materials or semi-finished products in the factory must be crushed to different degrees to make the block size reach the size required by each process, so as to facilitate the operation and processing. Due to the different sizes of the materials to be processed, crushing can be divided into two stages: crushing and grinding. The process of breaking large pieces of material into small pieces is called crushing, and the process of breaking small pieces of material into fine pieces is called grinding.
2.The fragility of material
The degree of difficulty of material crushing is called brittleness. , When the same crushing machine crushes different materials under the same operating conditions, the production capacity is different, which shows that the brittleness of various materials is different. Density, structural uniformity, moisture content, viscosity, cracks, brittleness, and the strength and hardness of the material are related to the material’s resistance to external forces, surface conditions, and shape. Strength and hardness are not necessarily difficult to crush, so materials with high strength and hardness are more difficult to crush.
Because the crushing of the material is divided into pieces, the determining factor of the difficulty of crushing is the strength of the material. Materials with high hardness and low strength (that is, the structure is loose and brittle) are easier to break than those with high strength and low hardness (that is, tough and soft). Obviously, materials with high hardness are not necessarily difficult to break, but they are difficult to grind. At the same time, it also makes the working surface of the crushing machine easy to wear. This is because the grinding process is different from the crushing process, and the surface is continuously ground to generate a large amount of fine powder. The former is the hardness ratio of the working body during the grinding process. greater impact.
3. Crushing system
Crushing work can be done by different crushing systems. There may be various crushing systems depending on the nature of the material to be crushed, the degree of tension, the required crushing ratio, the scale of production and the crusher used.
The crushing system includes two aspects: the number of crushing stages and the process in each stage. The number of stages of the crushing system is mainly determined by the crushing ratio required by the material and the type of crusher. When one type of crusher can meet the requirements of the crushing ratio and production capacity, a primary crushing system is used; If two or three types of crushers need to be selected, and when several stages of crushing can meet the requirements, a secondary or tertiary crushing system is used.
The more the number of crushing stages, the more complex the system. Not only the investment in equipment and civil works increases, but also the labor productivity is low, the frequent maintenance costs are high, and there are many dust spots, so we should strive to reduce the number of crushing stages. However, with the expansion of the mine scale of the cement plant, the feeding particle size of the crushing system also increases, and the required crushing ratio also increases accordingly. In order to meet the needs of increasing the crushing ratio and reducing the number of crushing stages, the crusher is urged to develop towards a large crushing ratio, high efficiency and large-scale. The crushing ratio of the new hammer crusher and impact crusher manufactured in recent years has been increased to more than 50, which can enable the crushing of limestone in large cement plants to use primary crushing. Thereby simplifying the crushing system, saving floor space and infrastructure investment, and reducing power consumption and production costs.
Due to the continuous improvement and development of the crusher, there are good conditions for the improvement and development of the crushing system. At present, the crushing system is not only developing in the direction of reducing the number of crushing stages and simplifying the production process, but also carrying out multiple operations in the direction of crushing and drying in a single process.
The concept of crusher and the main purpose of operation
The process of cracking large materials into small particles is called crushing, and the machine used for crushing is called crusher. In coal preparation plants or screening plants, such as crushing operations, the main purposes are as follows:
1. Adapt to the requirements of selected granularity. The coal particle size that can be processed by the selection machinery has a certain range, and the large pieces exceeding this range must be crushed before washing.
2. Some coal lumps are gangue coal, which is mixed with coal and gangue. In order to select clean coal, it needs to be broken into smaller particle sizes to separate coal and gangue. The most common situation is to crush the medium coal selected by the main separator to less than 13mm or 6mm, and then send it to the re-sorter for selection.
3. To meet the user’s requirements for particle size, crush the selected products or coal lumps to a certain particle size. According to the particle size of the crushed product, the crushing operation can be divided into coarse crushing (crushing the material to more than 50mm), medium crushing (crushing to 25mm-6mm), fine crushing (crushing to 6mm-1mm), and crushing (below 1mm).
Sandrock Mining has been manufacturing and wholesaling crushers and crusher wear parts for 15+ years. Our crushers and parts have been exported to Europe, Russia, Africa, the Middle East, Southeast Asia, Australia, America, etc. To service for Mining, Quarrying, Construction, Metal Recycling, and Heavy Engineering Service Section, and demolition Industries with highly commend. If you want to find any solutions for your business or want any crushers and crusher wear parts, welcome to contact us for details.
