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manual crushing and grinding methodsgold stamp mill and rod mills

Manual methods of crushing and grinding are important in small scale mining. Sledge hammer A common method of pre-sizing rocks before grinding in a stamp mill or ball mill is to place oversize rocks (>2″) on a large flat rock, inside a Hessian or nylon ring which holds the rocks in place while they are hit with a hammer and passed to a second miner/miller who repeats the process to produce typically 1 …

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