Secondary and tertiary crushing, if necessary, are the final steps in reducing the material to a desired product size. Historically, cone and roll crushers were the most common choice crushers, but in recent years impact crushers are more widely used. These crushers also are sometimes used as primary crushers for fine-grained gravel deposits.
The cone crusher (a compression type) simply crushes the aggregate between the oscillating cone and the crusher wall. Clearance settings on this equipment are required to be checked and maintained as part of standard operating procedure antimony ore processing plant design.Compound Cone Crusher suppliers
As with other compression crushers, the cone crusher yields a somewhat elongated and slivery particle shape. This may be minimized, Compound Cone Crusher Manufacturers
however, by “choke” feeding the crusher. This technique will also make the shape and size more uniform. One way to choke feed is with a surge hopper and a controlled belt-feed to the cone crusher. Automatic level controls measure the head of the material over the top of the cone.
A roller crusher is another compression type crusher that simply breaks the material by pinching the aggregates. These types of crushers are often found in gravel operations.
Roller crushers have constant maintenance problems and are prone to excessive wear. The rollers are required to be checked frequently to insure proper clearance and uniformity across each roller.professional Compound Cone Crusher manufacturers
Rebuilding and remilling the roller is a standard operating procedure.