广西某低品位金矿氰化浸出助浸剂实验研究  

Experimental Study on Cyanidation Leaching of a Low-grade Gold Mine in Guangxi

作　　者：苑林松 代淑娟 苏馨 余鑫 岳翔 刘春琦 Yuan Linsong;Dai Shujuan;Su Xin;Yu Xin;Yue Xiang;Liu Chunqi(School of Mining Engineering,University of Science and Technology Liaoning,Anshan,Liaoning,China;Design and Research Institute of Pangang Group Mining Co.Ltd.,Panzhihua,Sichuan,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]攀钢集团矿业有限公司设计研究院,四川攀枝花617036

出　　处：《矿产综合利用》2023年第2期63-69,共7页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金(51574146)。

摘　　要：广西某低品位金矿石含金量为1.29 g/t,脉石矿物以石英为主,有色金属铜、铅、锌等及有害元素砷的含量极低。对该矿石进行氰化浸金实验研究,分别考查磨矿细度、溶液pH值、氰化物用量、搅拌转速、浸出时间对金浸出效果的影响;通过单矿物氰化助浸实验,确定多种助浸效果较好的助浸剂,并按同一比例混合,获得了三种新型助浸剂A、B、C;针对广西某低品位金矿石,进行氰化浸出助浸实验。结果表明,矿样细度-0.074 mm 93.27%,溶液pH值为10.5,氰化钾用量为4 kg/t,搅拌转速为1500 r/min,浸出时间为24 h的实验条件下,金的浸出率为92.58%;而氰化钾用量减少至3 kg/t,其余条件不变的情况下,加入新型助浸剂A浸出18 h后,金的浸出率可达93%。新型助浸剂的加入有效地提高了金的浸出率,同时将氰化物的损耗降低了25%,浸出时间缩短了6 h以上。Gold content of a low-grade gold ore in Guangxi is 1.29 g/t,the gangue minerals are mainly quartz,and the content of non-ferrous metals such as copper,lead,zinc and other harmful elements arsenic is extremely low.The cyanide gold leaching test was carried out on the ore,and the effects of grinding fineness,pH value of solution,cyanide dosage,stirring speed and leaching time on the gold leaching effect were investigated respectively;The leaching aids with better leaching effect were mixed in the same proportion,and three new leaching aids A,B and C were obtained;for a low-grade gold ore in Guangxi,a cyanide leaching aid leaching test was carried out.The results show that the sample fineness of-0.074 mm accounts for 93.27%,the pH value of the solution is 10.5,the dosage of potassium cyanide is 4 kg/t,the stirring speed is 1500 r/min,and the leaching time is 24 h,the gold leaching rate is 24 h.92.58%;the amount of potassium cyanide was reduced to 3 kg/t,and the other conditions remained unchanged,after adding the new leaching aid A for 18 h,the leaching rate of gold could reach more than 93%.The addition of the new leaching aid effectively improves the leaching rate of gold,reduces the loss of cyanide by 25%,and shortens the leaching time by more than 6 h.

关 键 词：金 氰化浸出 助浸剂 

分 类 号：TD952[矿业工程—选矿]