某难处理复杂金精矿高效循环回收金银试验研究  

Experimental study on efficient recycling of gold and silver from a refractory complex gold concentrate

作　　者：温永杰 Wen Yongjie(Shandong Guoda Gold Co.,Ltd.)

机构地区：[1]山东国大黄金股份有限公司

出　　处：《黄金》2023年第5期47-51,共5页Gold

摘　　要：针对国外某金矿产出的难处理复杂金精矿,采用细磨—氰化法、焙烧—氰化法处理,金浸出率分别为26.99%、79.97%,回收效果不理想,同时其他有价元素难以得到有效综合回收,造成资源浪费。研究了高效回收该金精矿中有价元素金、银的工艺技术,结果表明:采用添加钠盐二级焙烧—酸浸—浮选,金银精矿浸出—氰渣循环焙烧及浮选尾矿氰化工艺,在最佳条件下,氰渣金品位为1.78 g/t、银品位为54.10 g/t,金总回收率达到96.29%、银总回收率达到92.01%;且尾渣铁品位达到63.20%,可作为制备高质量炼铁球团矿的原料,实现了金精矿资源的高效综合回收。The refractory complex gold concentrate produced by a foreign gold mine is treated by fine grinding-cyanidation method and roasting-cyanidation method.The gold recovery rates are 26.99%and 79.97%respectively,and the recovery effect is not satisfactory.What s more,other valuable elements are difficult to be recovered effectively and comprehensively,resulting in a waste of resources.The technology of the efficient recovery of valuable elements of gold and silver from the gold concentrate is studied.The results show that by secondary roasting with sodium salt,acid leaching,flotation enrichment,high cyanide leaching of gold and silver concentrate,cyanide residue recycling,and cyanide leaching of flotation tailings,and under the optimum conditions,the gold grade of cyanide slag is 1.78 g/t,the silver grade is 54.10 g/t,the total recovery of gold is 96.29%,and the total recovery of silver is 92.01%;the iron grade of tailings reaches 63.20%,which can be used as the raw material for the preparation of high-quality iron-making pellets,realizing the efficient and comprehensive recovery of gold concentrate resources.

关 键 词：金精矿 焙烧 酸浸 浮选 氰化 钠盐 

分 类 号：TF831[冶金工程—有色金属冶金]