Large Mining Crusher

Large Mining Crusher

Development and application of large mining crushers

The mining crusher is mainly used for the crushing of large ores in the mining process. The process is gravel or broken stone. It is generally referred to as raw ore after mountain blasting, and processed into finished product size to meet the demand. With the development of mining crushers, the overall process of mining has been improved to a certain extent, and crushers are listed as core equipment in large-scale mining processing. According to the feed size and discharge size of the ore, the crusher is used in the coarse, medium and fine crushed ore fields. The development of the crusher is based on the continuous improvement of the application of the crusher, and the performance of the product is also continuously improved to meet the demand to a greater extent.

In the 1980s, the crusher used two slabs to squeeze and bend the material, and to grind or crush the materials of various hardnesses; if it was working, it only made a simple arc swing. The industry calls a simple oscillating jaw crusher; if it is used for circular arc swing while working, it is also called up and down movement, called complex oscillating jaw crusher. The jaw crusher is widely used. In the mining, smelting, building materials, road, railway, water conservancy and chemical industries, the jaw crusher crushes various materials with a compressive strength not exceeding 320 MPa. Due to the development of the requirements, in order to avoid the impact of production due to the replacement of broken parts, hydraulic devices can also be used to achieve insurance and adjustment. Some jaw crushers also use hydraulic transmission to drive the moving jaws to complete the crushing action of the material. These two types of jaw crushers with hydraulic transmissions are often referred to as hydraulic jaw crushers.

mining crusher

In the early 1970s, the rotary crusher used the rotary motion of the breaker in the cone cavity of the casing to cause extrusion, splitting and bending of the material, and coarse crushing of large hardness of ore or rock. The upper end of the main shaft equipped with the crushing cone is supported in the bushing in the middle of the beam, and the lower end is placed in the eccentric hole of the bushing. When the sleeve rotates, the crushing cone rotates around the center line of the machine, and its crushing action is continuous, so the working 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 required for the coarse crushing operation. Therefore, a parallel section must be provided at the lower part of the crushing chamber, and at the same time, the rotation speed of the crushing cone must be accelerated so that the material is in the parallel zone. Subject to more than one squeeze. The discharge port of the cone crusher is small, and the non-crushed material mixed into the feedstock is more likely to cause accidents. Because the medium and fine crushing operations have strict requirements on the discharge size, the discharge opening must be adjusted in time after the liner is worn, and thus the cone is broken. The fuse and adjustment device of the machine is more necessary than the rough operation. The cone crusher is the same as the gyratory crusher, but only for crushing machines with medium or fine crushing operations. The cone crusher is constantly developing, and there are crusher equipment such as spring cone crusher and single cylinder hydraulic cone crusher and multi-cylinder hydraulic cone crusher.