某含铜金矿石氨氰柱浸提金试验

对某碳酸盐型含铜金矿开展了氨氰柱浸试验研究，分别研究了入柱粒度、不同氨氰比、滴淋强度和不同液体配制滴淋液返回滴淋等因素对柱浸效果的影响。试验表明：控制-20 mm粒级入柱，有效氨氰比为2∶1以及滴淋强度为5~10 L/m²·h时，Au的浸出率为82.06%，Cu的浸出率为7.85%，NaCN耗量由原来的15 kg/t矿降低到4.24 kg/t矿，NH₄HCO₃耗量为35.33 kg/t矿。同时，当采用含Cu贫液补加药剂返回滴淋时，Cu浸出效果为采用清水时的21%，Cu的浸出受到进一步抑制，而Au的浸出未受到影响。

Ammonia-cyanide Column Leaching of a Copper Bearing Gold Ore

This article carried out an experimental study on the ammonia-cyanide column leaching of a carbonate rock gold deposit containing copper.It studied the particle size，the ammonia cyanide ratio，the irrigation rate and the eluent composition and so on，on the influence to the column leaching effect.The results show that when the particle size is -20 mm，the effective ammonia cyanide ratio is 2∶1，and the irrigation rate is 5 to 10 L/（m²·h），the leaching rate of Au will reach 82.06%， but the leaching rate of Cu is only 7.85%，the consumption of main leach- ing agent NaCN dropped from 15 kg to 4.24 kg per ton ore，and the NH₄HCO₃ correspondingly needed 35.33 kg per ton ore.Additionally，compared using water as the solvent of leaching agents with using the copper-containing barren solution as the solvent，it did not affect the leaching rate of Au，but the leaching rate of Cu decreased by 79%.