Development and wide application of mining stone crusher

 Development and wide application of mining stone crusher

Mining rock crusher is mainly used for crushing large ore in mining technology. The process is rock crushing or rock breaking. Generally, it refers to the raw ore after mountain blasting and is processed into a finished product size that meets the demand. With the development of mining rock crushers, the overall mining process has been improved to a certain extent, and rock crushers are listed as core equipment in large-scale mining processing. According to the size of the feed and the size of the output, the crusher is used in the fields of coarse, medium and fine crushing of ore. The development of stone crushers is based on the continuous improvement of the application of stone crushers, and the product performance is also continuously improved to meet the needs to a greater extent.

In the 1980s, the rock crusher used the squeezing and bending action of the two jaw plates to crush materials of various hardness; if the movable jaw only makes a simple arc swing when working , It is called a simple swing jaw crusher in the industry; if it is moved up and down while working in a circular arc, it is called a complex swing jaw crusher. Jaw crushers are widely used in many sectors such as mining, smelting, building materials, highways, railways, water conservancy and chemical industries, jaw crushers crush various materials with compressive strength not exceeding 320 MPa. Due to the development of requirements, in order to avoid affecting production due to replacement of broken parts, hydraulic devices can also be used to achieve insurance and adjustment. Some jaw crushers also directly use hydraulic transmission to drive the movable jaw plate to complete the material crushing action. These two types of jaw crushers with hydraulic transmission devices are often collectively referred to as hydraulic jaw crushers.

By the early 1970s, the rotary rock crusher used the rotary motion of the breaking hammer in the inner cone of the shell to squeeze, split and bend the material to coarsely crush ores or rocks of various hardness. The upper end of the main shaft with the crushing cone is supported in a bush in the middle of the beam, and the lower end is placed in the eccentric hole of the shaft sleeve. When the shaft sleeve rotates, the crushing cone moves eccentrically around the center line of the machine. Its crushing action is continuous, so the work efficiency is higher than that of the jaw crusher.

The uniformity of the discharge particle size of the medium and fine crushing operations is generally higher than that of the coarse crushing operations. Therefore, a parallel zone must be set in the lower part of the crushing chamber. At the same time, the gyration speed of the crushing cone must be increased so that the material is in the parallel zone. Squeezed more than once. The discharge port of the cone crusher is small, and the non-crushed materials mixed into the feed are more likely to cause accidents. Because the medium and fine crushing operations have strict requirements on the discharge size, the discharge port must be adjusted in time after the liner is worn. The safety and adjustment device of the stone crusher is more necessary than the coarse crushing operation. The cone crusher is the same as the gyratory crusher, but it is only suitable for crushing machinery for medium or fine crushing operations. Cone crushers continue to develop, including spring cone crushers, Simmons cone crushers, single-cylinder hydraulic cone crushers, and multi-cylinder hydraulic cone crushers.

At the same time, hammer crushers and impact crushers continue to develop. In particular, impact crushers have a larger crushing ratio and can more fully utilize the high-speed impact energy of the entire rotor. However, due to the easy wear of the plate hammer, its application in the crushing of hard materials is also limited. It is usually used for coarse crushing, medium crushing or fine crushing of limestone, coal, calcium carbide, quartz, dolomite, iron sulfide ore, gypsum and chemical raw materials, etc. Brittle materials below medium hard.

　Stone crushers are widely used in many sectors such as mining, smelting, building materials, highways, railways, water conservancy and chemical industries. At present, commonly used stone crushing machinery includes jaw crusher, impact crusher, hammer crusher, impact crusher, roller crusher, compound crusher, etc., which are used in building materials, bricks, coal, metallurgy, mining, and electric power. , Light industry and other industrial sectors, used to crush coal, shale, cinder, carbon, lime, cement, bentonite, and medium hard and brittle materials for coarse, medium and fine crushing.