青海某铁帽型金银矿石氰化浸出试验研究

为开发利用铁帽型金银矿产资源，对青海某铁帽型金银矿石进行了氰化法浸出试验研究，考察了磨矿细度、浸出时间、矿浆浓度、NaCN用量、石灰用量和醋酸铅用量等因素对金银浸出率的影响，进而确定了最佳浸出条件。试验结果表明：在磨矿细度-0.074 mm占98.23%，矿浆浓度33.33%，石灰用量10 kg/t，氰化钠用量2.5 kg/t，醋酸铅用量100 g/t以及浸出时间24 h条件下，该矿石中金、银浸出率分别达到93%和83%以上。该研究成果为青海某铁帽型金银矿的开发利用提供了技术支撑，并对同类型矿石资源的高效开发具有重要的借鉴意义。

The Experimental Study on Cyanidation Leaching of a Gossan Type Gold-Silver Ores in Qinghai Province

In order to develop and utilize mineral resources in gossan type gold and silver ores，cyanide leaching was applied to study the gossan type gold and silver ores in Qinghai Province.We investigated the effect of grinding fineness，leaching time，pulp density，dosage of sodium cyanide，lime and lead acetate to leaching rate for gold and silver，finally the optimum leaching condition was determined.The results showed that grinding fineness of -0.074 mm accounted for 98.23%，pulp density around 33.33%，lime dosage of 10 kg/t，the dosage of sodium cyanide of 2.5 kg/t，lead acetate of 100 g/t，and under the leaching time of 24 h，the leaching rate of gold and silver was above 93% and 83%，respectively.The results provided technical support for the development and utilization of gossan type gold silver ores in Qinghai Province，and it is of great significance for the efficient development of the same kind of resource.