An Arrastra (or Arastra) is a primitive mill for grinding and pulverizing (typically) gold or silver ore. The simplest form of the arrastra is two or more flat-bottomed drag stones placed in a circular pit paved with flat stones, and connected to a center post by a long arm. With a horse, mule or human providing power at the other
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They sometimes used mercury, which forms an amalgam with small particles of gold and silver. Miners used mechanical crushing and grinding machines to break up ores for further processing. Early miners used Mexican arrastras or stamp mills, which reached their peak in the late nineteenth century, to crush ores into
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Jun 2, 2017 www.machinejxsc.com,wet pan mill grinding machine is for rock gold mining plant,this 1 TPH capacity rock gold milling machine can grind rock gold -1 mm. very popular used in tanzania/zimbabuwe/kenya/Ethiopia/Cango,ect africa countries.this wet pan mill also can used for grinding rock
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