Abstract
The main metal minerals are magnetic pyrite arsenopyrite pyrites, galenite sphalerite,etc.The main gangue minerals are quarts,sericite,chlorite,carbonate,etc.Nature gold,electrum,bullion and nature silver are main gold silver minerals. The useful element is gold and silver and the impurity is arsenic. The experimental results of cyanide leaching crude and flotation concentrate show that the index of leaching rate of gold and silver being 93.90% and 81.38% are got on the condition of grinding fineness being 95.3%-0.074mm，pulp thickness being 33%，dosage if CaO being 2.5kg/t（pH≈11），dosage of NaCN being 3.0kg/t,leaching time being 24h by leaching crude of gold and silver grade being 0.82g/t、4.78g/t.
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