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The development and application of large mining stone crushing machine
Mining stone crusher is mainly used in the mining process of large ore crushing, the process of stone crushing or stone breaking, generally refers to the mountain blasting raw ore, processed to meet the needs of the finished product particle size. With the development of mining stone crusher, to a certain extent, improved the overall process of mining, stone crusher in the large-scale mining processing as the core equipment. Stone crushing according to the feed size of the ore and the size of the discharge particle size, stone crusher is used in the field of coarse, medium and fine crushing of ore. The development of stone crusher is based on the continuous improvement of the application of stone crusher, and the performance of the product is also improving to meet the demand to a greater extent. In the 1980s, stone crusher using two jaws on the material extrusion and bending effect, for a variety of hardness of materials for coarse or medium crushing process; if the work of the movable jaw is only a simple arc swing, the industry known as the simple swing jaw crusher; if the work of the arc swing at the same time also for the up and down movement, known as the complex swing jaw crusher. Jaw stone crusher is widely used in mining, smelting, building materials, highways, railroads, water conservancy and chemical industry and many other sectors, jaw stone crusher crushing compressive strength of not more than 320 MPa of various materials. Due to the development of requirements, in order to avoid affecting production by replacing broken parts, hydraulic devices can also be used to realize insurance and adjustment. Some jaw stone crusher also directly adopts hydraulic transmission to drive the movable jaw plate to complete the crushing action of materials. These two types of hydraulic drive jaw crusher, often collectively referred to as hydraulic jaw crusher. By the early 1970s, the gyratory crusher, using the crushing hammer in the shell of the cone cavity of the rotary movement, the material to produce extrusion, splitting and bending effect, coarse crushing of various hardness of ore or rock large crushing machinery. The upper end of the main shaft with crushing cone is supported in the bushing in the middle of the beam, and its lower end is placed in the eccentric hole of the bushing. When the bushing rotates, the crushing cone rotates around the centerline of the machine in an eccentric motion. Its crushing action is continuous, so the working efficiency is higher than that of the jaw crusher. Medium and fine crushing operations, the uniformity of the discharge size is generally higher than the requirements of coarse crushing operations, therefore, in the lower part of the crushing chamber must be set up in a section of the parallel zone, at the same time, must also speed up the speed of the crushing cone rotary speed, so that the material in the parallel zone by more than one extrusion. The discharge opening of the cone crusher is small, the non-crushed material mixed into the feed material is more likely to cause accidents, and because of the medium and fine crushing operations on the discharge size requirements are strict, must be in the liner wear and tear after timely adjustment of the discharge opening, so the cone crusher insurance and adjustment device is more necessary than the coarse crushing operations. Cone crusher and gyratory crusher the same, but only for crushing or fine crushing operations in the crushing machinery. Cone crusher continues to develop, there are spring cone crusher, Simmons cone crusher and single-cylinder hydraulic cone crusher as well as multi-cylinder hydraulic cone crusher and other stone crushing equipment. At the same time, the hammer crusher and impact crusher continue to develop, especially impact crusher crushing ratio is larger, and can more fully utilize the entire rotor high-speed impact energy. However, because the plate hammer is easy to wear, it is also limited in the application of hard material crushing, usually used for coarse, medium or fine crushing of limestone, coal, calcium carbide, quartz, dolomite, iron sulfide ore, gypsum and chemical raw materials, such as brittle materials below the medium hard. Stone crusher is widely used in many departments such as mining, smelting, building materials, highway, railroad, water conservancy and chemical industry. At present, the commonly used stone crushing machinery are jaw crusher, impact crusher, wind crusher, hammer crusher, impact crusher, roller crusher, composite crusher and so on are used in building materials, brick and tile, coal, metallurgy, mining, electric power, light industry and other industrial sectors, used for crushing the coarse crushing, medium crushing and fine crushing of coal, shale, coal slag, charcoal, lime, cement cement, pescetto and medium-hard and brittle materials.
