What is a crusher? What kinds of crushers are there? What are the uses of crusher? How to choose a crusher manufacturer?

1, what is a crusher? Crushers are generally used in the mining industry. Crusher refers to the discharge of material size greater than three millimeters in the content of the total discharge of more than 50% of the crushing machinery. Crushing operations are often divided into coarse, medium and fine crushing according to the size of the feed and discharge size. Crusher is widely used in mining, smelting, building materials, highways, railroads, water conservancy and chemical industry and many other industries in the crushing operation. 2, crusher divided into which kinds? Commonly used crushing machines are jaw crusher, impact crusher, PCL through impact crusher, gyratory crusher, cone crusher, roller crusher, hammer crusher and vertical shaft impact crusher and so on. General crusher is divided into jaw crusher, hammer crusher, impact crusher, impact crusher, vertical crusher, sand making machine (also regarded as crusher), single-section hammer crusher, ring hammer crusher, cone crusher, compound swing jaw crusher. Jaw crusher is a crushing machine which utilizes the squeezing and bending action of two jaw plates on the materials to crush various hardness materials roughly or moderately. The crushing mechanism consists of fixed jaw plate and movable jaw plate. When the two jaw plates are close to each other, the material is crushed, and when the two jaw plates leave, the material smaller than the discharge opening is discharged from the bottom. Its crushing action is intermittent. This kind of crusher is widely used in mineral processing, building materials, silicate and ceramics industries because of its simple structure, reliable operation and ability to crush hard materials. Cone crusher has the same working principle as gyratory crusher, but it is only suitable for medium or fine crushing operation. The uniformity of the discharge size of the medium and fine crushing operation is generally higher than that of the coarse crushing operation, therefore, a section of parallel zone shall be set up in the lower part of the crushing cavity, and at the same time, the rotary speed of the crushing cone shall be accelerated, so that the material can be extruded more than once in the parallel zone. The crushing of the fine crushing operation is larger than that of the coarse crushing operation, so the loose volume after crushing has a larger increase. In order to prevent the crushing chamber from being blocked, the total discharge cross-section must be increased by increasing the diameter of the lower part of the crushing cone without increasing the discharge opening to ensure the required discharge size. The discharge opening of the cone crusher is small, and the non-crushed materials mixed into the feed material are more likely to cause accidents, and because of the strict requirements of medium and fine crushing operations on the discharge size, the discharge opening must be adjusted in time after the wear of the liner, and thus the insurance and adjustment device of the cone crusher is more necessary than that of the coarse crushing operations. Roll crusher is a machine that utilizes the friction force of roll surface to bite the material into the crushing area and make it bear extrusion or splitting and crushing. When used for coarse crushing or the need to increase the crushing ratio, often in the roll surface to make teeth or grooves to increase the splitting effect. Roll crusher is usually categorized into single-roll, double-roll and multi-roll crusher according to the number of rolls, which is suitable for coarse crushing, medium crushing or fine crushing of coal, limestone, cement clinker and feldspar and other materials below medium hardness. Hammer crusher is a crushing machine that utilizes the high-speed impact of hammer head to crush materials in medium and fine crushing. The hammer head is hinged on the high-speed rotor, and the lower part of the body is equipped with grate bars to control the discharge size. The material fed into the crusher is firstly crushed by the impact of the high-speed hammer head, and at the same time obtains kinetic energy and flies to the crushing plate on the inner wall of the machine shell at high speed and is crushed again. The material smaller than the grate gap is discharged out of the machine, and the material larger than the grate gap is impacted and ground by the hammer again on the grate until it is discharged after being smaller than the grate gap. Hammer crusher has the advantages of large crushing ratio, even size of discharged material, less overcrushed material, low energy consumption and so on. However, due to the rapid wear of the hammer head, it is limited in the application of hard material crushing; in addition, due to the grate bar is afraid of clogging, it is not suitable for crushing materials with high humidity and clay content. This kind of crusher is usually used to crush limestone, shale, coal, gypsum, chalk and other brittle materials below medium hard. The ring type coal crusher, which replaces the hammer head of hammer crusher with steel ring, is a variant of hammer crusher. It utilizes the combined effect of high-speed impact and low-speed crushing to crush materials, thus obtaining finer products, and is mainly used to crush coal for power plants, but can also be used to crush gypsum, salt chemical raw materials and some medium-hard materials. Impact Crusher is a machine that utilizes the high-speed impact of the plate hammer and the rebound effect of the impact plate to crush materials by repeated impacts. The hammers are fixedly installed on the high-speed rotor, and a number of impact plates are arranged at different angles along the crushing cavity. When the material enters the action area of the plate hammer, it is firstly crushed by the first impact of the plate hammer, and at the same time obtains kinetic energy and rushes to the impact plate at high speed. After crushing with the impact plate again, the material is bounced back to the action area of the plate hammer, and is impacted by the plate hammer again. This is repeated until the material is crushed into the required size and discharged from the machine. Compared with the hammer crusher, the impact crusher has a larger crushing ratio and can more fully utilize the high-speed impact energy of the entire rotor. However, it is also limited in the application of hard material crushing due to the extremely easy wear of the plate hammer. It is usually used for coarse, medium or fine crushing of brittle materials below medium hardness, such as limestone, coal, calcium carbide, quartz, dolomite, sulphide iron ore, gypsum and chemical raw materials. Direct Impact Crusher (Sand Making Machine): This product is suitable for crushing and shaping soft, medium-hard and very hard materials, widely used in various ores, cement, refractory materials, bauxite clinker, adamantine, glass raw materials, mechanism construction sand, stone and various metallurgical slag, especially for silicon carbide, adamantine, sintered bauxite, sand and other high-hard, special-hard, wear-resistant and corrosive materials, higher output and efficacy than other types of crusher. Higher efficacy. Working Principle of Direct Impact Crusher (Sand Making Machine): The materials fall vertically into the high-speed rotating impeller from the upper part of the machine, under the action of high-speed centrifugal force, and the other part of the material in the form of umbrella shunt around the impeller to produce high-speed collision and crushing, the materials in the impact on each other, and then in the vortex between the impeller and the casing of the materials formed by the repeated impact, friction, and crushing, and from the lower part of the direct discharge to form a closed-circuit multiple cycles, the screening and crushing process is completed by the screening and crushing system. Closed circuit cycle, controlled by the screening equipment to achieve the required size of the finished product. 3, what are the uses of the crusher? The crusher is widely used in mining, smelting, building materials, highway, railroad, water conservancy and chemical industry and many other industries in the crushing operation. 4、How to choose the crusher manufacturer? First of all, we should look at the strength, reputation and scale of the manufacturer; secondly, we should look at the quality of the manufacturer's products, the level of technology, the degree of maturity of the manufacturer again to examine the manufacturer's customer production site, the user site is the most convincing. Finally, we must compare three, carefully examine and carefully choose. For more information, please refer to the website of Liming Road and Bridge Heavy Industry Co.