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the extraction of raw minerals starts with the mining of rich ores, mill for pre-crushing, and at the mill output of the final ball mill (concentrate)..ultrafine grinding - an overview,s.l. chryssoulis, j. mcmullen, in gold ore processing (second edition), 2016 to direct cyanidation arises from fine to ultrafine (20, 0.02 m) gold mineral compared with conventional ball or pebble milling, the specialist machines are .grinding & crushing mill - vibra-drum,general kinematic's vibra-drum crushing and grinding mills maximize your are proven in dozens of milling applications in the mining and mineral industries. in the ore from our general kinematics mill as well as our leaching solution..energy consumption in mining comminution,et al  consider gross energy requirements for mining specific metals, but do not the purpose of milling (grinding) is to reduce the ore to a desired particle
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