Impact breakers

Primary cmshers are of two basic types compression or impact. Compression cmshers typified by the jaw, cone, and gyratory primary cmshers, operate by the slow appHcation of pressure which causes the rock to crack and mpture. In contrast, impact cmshers, on which impact breakers and... 

A number of general principles govern the selection of crushers [Riley, Chem. Proce.ss Eng. (January 1953)]. When the rock contains a predominant amount of material that has a tendency to be cohesive when moist, such as clay, any form of repeated pressure crusher will show a tendency for the fines to pack in the outlet of the crushing zone and prevent free discharge at fine settings. Impact breakers are then... 

Impact breakers include heavy-duty hammer crushers and rotor impact breakers. Fine hammer mills are described in a subsequent subsection. 

TABLE 20-15 Performance of Dual-Rotor Impact Breakers... 

Jaw crushers Gyratory crushers Roll crushers Edge runner mills Impact breakers Autogeneous mills Cone crushers... 

Tube mills Ring roll mills Ring ball mills Roller mills Peg and disc mills Cage mills Impact breakers Vibration mills... 

Roll crushers Impact breakers Edge runner mills... 

Tube mills Roller mills Peg and disc mills Cage mills Impact breakers Vibration mills Rotary cutters and dicers Ball, pebble and cone mills Tube mills Ring roll mills Ring ball mills Roller mills Peg and disc mills Cage mills Impact breakers Vibration mills Ball, pebble, rod and cone mills ... 

Impact breakers Ring ball mills Vibration and vibro- ... 

Impact breakers Peg and disc mills Perl mills tough materials ... 

Impact breakers Ring roll mills Sand mills ... 

Some buffer storage of quicklime is usually provided between the lime kilns and the hydrating plant to provide operating flexibility. Where the removal of impurities in the hydrating plant is not important, the quicklime is generally reduced in size using impact breakers. Otherwise, rolls and jaw crushers, or cone mills may be used (see section 5.2). 

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