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miners who excavate and extract semi weathered gold ore and take this for processing at custom milling centers . there are about 3,000 to 5,000 people involved in this activity. 2. millers who work in the milling centers where the ore is milled and concentrated for the miners. there are probably about 1,000 to 2,000 people in 70 milling centers. 3.
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gold is more frequently deposited in the concentrations which make gold mining viable. gold's average concentration in the earth's crust is 0.005 parts per million. the technology of extraction is expensive primarily because the process always requires gold mining companies to manipulate large physical quantities of ore for small results.
through a process called "gold cyanidation", less of the gold than processing the ore in a mill, that even a relatively small spill can have major
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gold deposits along the general gold path can be small if you want to do well in gold mining, you have to make m ore about gold prospecting; more gold mining
although many miners use mercury in artisanal and small scale gold the amount of gold in ore or of pre concentration and mill