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How to Choose a Primary Rock Crusher?

Question: How to Choose a Primary Rock Crusher?

Reply: With primary crushers, consideration should be made regarding initial cost, reduction ratio, horsepower per ton per hour, hardness, abrasiveness of the material, feed size input and product required. More recently, power consumption per ton produced has become a very important factor in crusher selection.
Tightening the quarry shot pattern should result in less oversize material being fed to the primary crusher hopper. Not having to break or remove oversize rock in the primary hopper can significantly improve efficiency in the system. Rock breaker hammers are a necessity at many primary stations, but at times can encourage operators to put oversize rock in the hopper.
n a stationary quarry set-up, there is typically a surge pile. The primary crusher is usually oversized in terms of capacity and operated at a lower efficiency than the rest of the plant. It is common for the primary sized material to be stockpiled in such a manner that it can be reclaimed from the bottom of the pile to feed the rest of the plant, thereby overcoming fluctuations in the feed from the primary crusher. The surge pile usually is designed with a live capacity of 2–3h or more.

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