In most aggregate crushing plants, primary crushing is carried out in a jaw crusher, although a gyratory primary crusher may be used. If 

TAKRAF's range of primary crushing plants Primary crushing plants can be equipped with gyratory crushers, jaw crushers, twin-shaft sizers, double-roll crushers, 

5.1 Introduction. Gyratory crushers were invented by Charles Brown in 1877 and developed by Gates around 1881 and were referred to as a Gates crusher [1]. The smaller form is described as a cone crusher. The larger crushers are normally known as primary crushers as they are designed to receive run-on-mine (ROM) rocks directly from the mines.

For example, a grizzly feeder can be wider than the hopper, and the crusher inlet wider than the feeder. The discharge chute under the crusher is 4 inches wider than the inner width of the crusher, and the subsequent discharge belt is another 4 inches wider than the discharge chute.

Primary crushers with crush run-of-mine rock from blast product size to what can be carried by the discharge conveyor or fit/math the downstream 

These big machines were designed to operate at rather coarse discharge settings, usually from 10 to 12″, and the usual practice was to follow them with gyratory crushers such as the No. 9 (21″)' or No. 10 (24″), the over-all ratio-of-reduction for the two machines being 14 or 15 to 1.

Define Primary Crusher. Be qualified to operate the primary gyratory crusher and perform all related job functions. Be qualified to operate Heavy Duty Haul Truck (Cat. Service or rock trucks trucks or equivalent). Laborer: Entry level position. Be qualified to perform clean up and general pit duties. Become trained as a Heavy Duty Truck Operator and/or as a Primary Crusher Operator.

9/27 · The first step in choosing a primary crusher takes place at a high level. It’s necessary to identify the purpose the crusher will be used for. This purpose is a given that

Model A Primary Crusher. Parallel shaft gearboxes drive coarse or fine grind output. Coarse-ground materials 1-4". Fine-ground materials 1/2-2". Fine grind increases output. Minimizes wear and additional processing by secondary/tertiary grinders. Available with coarse and fine grind options. Ductile iron discs mounted on an 8-inch square

Examples Of Primary Crusher. Primary Crushing . The term "primary crusher " by definition might embrace any type and size of crushing machine The term implies that at least two stages of crushing are involved but in many cases the machine which performs the function of initial crusher is the only crusher in the plant .

A primary crusher plays an important role in a mineral processing plant. It reduces the size of large rocks wherein the smaller pieces are