Gold Mining

The method of mining gold varies with natural deposit. Two types of deposit considered here: one is placer deposit, and the other is lode mine. In placer mining the separation of gold from gravel or other impurities is done by sifting, Hand panning. Lode mine refers to gold occurring as veins in gravel and rock, the rock is broken down by explosives, the ore is then transported to mills for milling followed by slicing. Then for obtaining pure gold the processes involved are floatation, amalgamation, cyanidation. In the final steps a weak solution of sodium, potassium is used to dissolve the gold, which is then precipitated by adding zinc dust.