A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting .. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grind material to the necessary . Attrition between grinding balls and ore particles causes grinding of finer particles.
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Mar 17, 2017 . Still used for certain grinding problems, this mill employs the . Although modern ore dressing practice employs Steel Head Ball Rod and Ball Mills in .. The Peruvian trapiche had a similar circular bed of hard stone, but only.
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