某氰化尾渣浮选回收金试验研究  

Experimental Study on Gold Recovery from a Cyanide Residue by Flotation

作　　者：陈建福 周健 陈宇 涂友兵 CHEN Jianfu;ZHOU Jian;CHEN Yu;TU Youbing(Jiangxi Sanhe Gold Industry Co.,Ltd.;Jiangxi Biological Metallurgy Engineering Research Center)

机构地区：[1]江西三和金业有限公司 [2]江西省生物冶金工程研究中心

出　　处：《现代矿业》2022年第8期167-170,共4页Modern Mining

基　　金：江西省科技厅重点研发计划项目(编号:2019BBG70061)。

摘　　要：某黄金冶炼厂的金精矿来源非常复杂,氰化浸出工艺不很稳定,导致氰化尾渣金品位高达3.75 g/t。为减少金流失、提高二次资源的利用率,在工艺矿物学研究基础上进行了浮选选金工艺流程试验。结果表明,试样粒度较细,主要金属硫化矿物黄铁矿是金的主要载体矿物,金主要被未氧化彻底的硫化矿物包裹,在细粒级略有富集;试样采用1粗2精1扫、中矿顺序返回闭路流程处理,最终获得产率为13.27%、金品位为21.47 g/t、金回收率为75.98%的浮选金精矿,取得了较好的金回收效果,实现了金二次资源的高效回收。The resources of gold concentrate in a gold smelter is very complicated,and the cyanide leaching process is not very stable,resulting in the gold grade of cyanide tailing up to 3.75 g/t.In order to reduce gold loss and improve the utilization rate of secondary resources,the process flow test of gold flotation was carried out on the basis of process mineralogy research.The results showed that the sample size is fine,and the main metal sulfide mineral pyrite is the main carrier mineral of gold.Gold is mainly encapsulated by sulfide minerals that are not completely oxidized and slightly enriched in fine grain.The sample was treated by a closed-circuit process of one roughing,two cleaning and one scavenging,and middling was returned in sequence.Finally,a flotation gold concentrate with yield of 13.27%,gold grade of 21.47 g/t and gold recovery rate of 75.98%was obtained.Good gold recovery effect was achieved and efficient recovery of secondary gold resources was realized.

关 键 词：氰化尾渣 金二次资源 浮选 活化 

分 类 号：TD926.4[矿业工程—选矿] TD923