ABSTRACT
The crushing action in all crushing machines results from forces applied to the particles by some moving part working against a stationary or some other moving part. Fine crushers reduce the coarse particle to fine, even to 200 mesh in some cases. Jaw crushers consist of two jaw plates set at an acute angle, called angle of nip, to each other which forms a crushing chamber. Simons cone crusher is the most widely used type of cone crusher. It has two forms: standard cone crusher and short-head cone crusher. Crushers are usually operated dry. When the material fed to the crusher is at a slow rate, the individual particles are crushed freely. In a closed circuit crushing operation, the oversize material from the screen is fed back to the same crusher. The quantity of the oversize material fed back to the crusher is called as circulating load.
