Mining industry development requires advanced technology and high quality equipment. Crushing is the integral and primary stage in any mining and mineral processing operation. Crushing plant is crucial for mining industry.
Primary Crusher Plant
Jaw crusher, impact crusher, or gyratory crushers are usually applied in primary stone size reduction. The crushed stone normally 3 to 12 inches in diameter, and the undersize particle sizes are discharged onto a belt conveyor and usually are conveyed for further processing or used as coarse aggregates.
Jaw crushers are the oldest and one of the simplest sorts of rock crushers. A jaw crusher is like a giant collapsible V made out of two metal walls. At the bottom, the two walls are very close together and at the top they are further apart. One wall is held still while the other is closed against it -- usually about three times a second. When it closes, the jaw crushes the rocks inside it. Because it tapers, the rocks are crushed to smaller and smaller sizes as they go down, then dropped through the bottom.
Secondary Crusher Plant
The crushed aggregate which is too large to pass through the top deck of the scalping screen is will be further crushed in the secondary crusher. Cone crushers or impact crusher are often used for secondary crushing, which typically reduces material to about 1 to 4 inches.
Tertiary Crusher Plant
Tertiary or fine crushing is generally processed using mobile cone crushers or impactor crushers. Oversize material from vibrating screen is fed to the tertiary crusher. The final particle size, which is typically about 3/16th to 1 inch.
The fine crushed stone maybe then conveyed to further processing systems such as washing, air separators, and screens and classifiers for the production of aggregate or manufactured sand.