云南某金矿是中国西南地区最大的黄金多金属共伴生矿山，其选矿厂原采用“全泥氰化浸出—弱磁选—强磁选”工艺对该矿多金属氧化矿石中的金、银、铁进行回收。为了提高金、银浸出率和铁回收率，对该选矿厂进行了控氰抑铜富氧浸出—差异化优先浸吸—脱泥梯级磁选的技术改造。生产实践表明：改进工艺实际生产指标与原工艺流程比较，金浸出率提高了12.16百分点，银浸出率提高了15.14百分点，总铁回收率提高了18.44百分点，经济效益显著。
The gold mine in Yunnan is the largest gold poly-metallic mine in southwest China .A whole ore cyani-dation leaching-low intensity magnetic separation -strong magnetic separation process is used to recover gold ,silver and iron from the poly-metallic oxide ores in the ore-dressing plant .To increase the leaching rate of gold and silver as well as the recovery rate of iron ,a renovation process of cyanide control copper suppression atmospheric leaching -dif-ferential preferential leaching and adsorption -desliming stepped magnetic separation is applied in the plant .Produc-tion practice show that the renovated process compared to the previous one increases gold leaching rate by 12.16 percent points,silver leaching rate by 15.14 percent points,iron recovery rate by 18.14 percent points,achie-ving satisfactory profits .
参考文献
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