Different techniques and technology used to crush ore in early gold mining Arrastre The first use of machinery in the gold rush was in the 1860s at an
An Arrastra or Arastra is a primitive mill for grinding and pulverizing typically gold or silver ore With a horse mule or human providing power at the other end of the arm the stones were dragged slowly around in a circle crushing the ore The word quot arrastra quot comes from the Spanish language arrastre meaning to drag
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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