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Rock Crushing Methods And How To Recover Gold From Ores

2020-4-22Rock Crushing methods and How to recover gold from Ores. A slightly different version of mortar and pestle work is a variety called hand stamp crushing A heavy cylinder of iron is welded to a long rod and placed inside a pipe or tube which is just a bit larger than the diameter of the iron cylinder This iron cylinder is picked up and dropped onto the ore much in the manner of the old time

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