Usually, cyanide pools are used to extract gold from ore. Since a large amount of water is needed for cyanide pools, and water has to be replaced in each cycle, these pools are usually located by river banks.
Liu said every ton of gold slag contains about two gram of gold. This means about 200 grams can be extracted from every cyanide pool of 100 tons of gold ore.
A cyanide factory usually has two pools. If these are cleaned once every seven days, the factory can generate 40,000 yuan (US$6,3469) in gross revenue each week. The cost of investing in a cyanide factory is about 800,000 yuan (US$126,940). Labor costs are also low for such factories.
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