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Determine the percentage of fines in the feed

April 28, 2024

0 01

"Fines in crusher feed" is defined as material entering the top of the crusher that is already equal to or smaller than the crusher's closed side discharge setting. As a rule of thumb, the maximum number of fine particles in the crusher feed should not exceed 25% for secondary crushers and 10% for tertiary crushers. When there are too many fines in the feed, it is usually the result of a vibrating screen problem. The problem may be due to insufficient screen size or appropriate screen size but inefficient operation.


Re-crushing and reprocessing product-sized material due to vibrating screens, inefficiencies due to the way the screen was originally installed or due to improper maintenance of the vibrating screen will result in excessive "fines in the crusher feed" . In turn, this will result in poor utilization of the connected crusher horsepower and higher energy costs per ton of material crushed.
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