About Jaw Crusher's Knowledge

A jaw crusher should not be sized to the maximum size rock that might be fed to the plant, but a size that will handle 95-98% of the material that might be fed to the jaw. Buying to the maximum size of rock that might be fed the jaw will result in buying a jaw crusher that will be under-utilized, difficult to keep choke-fed, cost more than necessary, and have a much higher operating cost. It will cost less to install grizzly bars over the feed hopper to remove the oversize rocks than to buy an over-sized jaw crusher. They can then be manually broken, sold as rip-rap or erosion control or landscaping boulders.

the fixed jaw plate is fixed vertically on the anterior machine body; the moving jaw plate is extraversive, forming two crushing chambers (working chamber) with fixed plate (with the large one on the top and the small one beneath it). The moving jaw does cyclical reciprocating motion towards the fixed jaw, sometimes separate from it and sometimes coming close to it. When separating, materials goes into the crushing chamber, finished products come out from the lower part; when coming close, materials between two jaw plates will be crushed by extrusion, bending and splitting effects.

According to different swing methods of the moving jaw plate, the crusher can be classified into three kinds: simple swing crusher, complex swing crusher and integrated swing crusher.

The classification of the jaw crusher: In mining, building materials and infrastructure sectors, the jaw crusher is mainly used as primary and secondary crusher. According to the width of the feed opening, it can be classified into three kindslarge, medium and small crushers. The feed opening width of the large jaw crusher is greater than 600MM, the medium-sized jaw crusher, 300-600MM, and the small crusher, less than 300MM.