Crushing the Ore Early Gold Mining Techniques Gold
An arrastre was a simple machine powered by animals or motors designed to speed up the crushing of quartz ore. The ore was placed in the bottom of the arrastre over which were placed large rocks. The rocks were ground over the ore crushing it and releasing the gold.
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Gold stamp mill and rod mills gold ore crusher. The California Stamp Mill UC Press EBooks Collection 19822004 Pulverizing ore by mortar and pestle was an ancient technique Prospectors used small mortars to test quartz outcrops during the Gold Rush but the same used long before to develop a mechanical crusher mon in European mills square stone mortar was "evidently
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