Underground mining operations typically use a steel grate called a grizzly to size material before it enters an ore pass. Material that is too large cannot pass through the openings in the grizzly and are left on top of the grizzly to be broken by a Rockbreaker, while the smaller material is allowed to pass through the grizzly down the ore pass.
Gyratory Crusher Applications
The gyratory crusher is the mainstay of medium to large duty crushing plants. Typically material is brought to the crusher by large haulage trucks and dumped into a rock box. The gyratory crusher is located at the bottom of the rock box. Material is crushed between the eccentrically mounted rotating crushing cone and the fixed, tapered crushing throat.
Mobile Crusher Applications
Mobile crushers are, as the name implies, designed to be moved from site to site. An appropriate sized breaker system will mount on the crusher securely so the crusher can be moved without first dismantling the breaker assembly yet be large enough to handle the raking and breaking.
Stationary Crusher Applications
Jaw crushers are typically used in many medium duty primary crushing applications. A fixed jaw plate opposite and moving jaw plate size the material through as it passes from the top to the bottom of the crusher. The jaw crusher is typically fed from a rock box by a vibrating feeder.