硫代硫酸盐浸金液中金回收的研究进展  

A Review on Gold Recovery from Thiosulfate Leaching Solution

作　　者：梁雨梦 陈鹏 贾菲菲[1] LIANG Yumeng;CHEN Peng;JIA Feifei(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《金属矿山》2020年第10期41-50,共10页Metal Mine

摘　　要：为开发简单高效的Au(S2O3)23-回收技术,进而推进环境友好型硫代硫酸盐提金技术的大规模工业化应用,实现金的绿色无氰化提取,详细评述了置换沉淀法、吸附法、溶剂萃取法和电解沉积法等几种硫代硫酸盐浸出液中Au(S2O3)23-回收的主要方法,并就各方法的优缺点及存在问题进行了归纳总结。传统活性炭及介孔硅吸附剂对Au(S2O3)23-的亲和力弱,改性处理虽可在一定程度上提高其对Au(S2O3)23-的吸附能力,但处理工艺复杂、成本较高;树脂法可较好地富集浸出液中的Au(S2O3)23-,但该方法存在金络合离子洗脱困难,树脂价格昂贵、易中毒粉化等缺点。溶剂萃取法适用于高浓度浸金液,且该方法对pH等溶液环境要求较高,工艺复杂,成本高。置换沉淀法和电解沉积法可直接获得金单质,但这两种方法对浸出液中Au(S2O3)23-浓度有一定要求,且多组分浸出液中其他金属的共沉淀严重影响了金产品纯度。在上述回收方法中,吸附法因成本低廉、操作简单、吸附剂可循环使用等优点,最具工业应用前景,但现有吸附剂无法有效回收硫代硫酸盐浸出液中的Au(S2O3)23-,因此,开发新型高效的Au(S2O3)23-吸附剂,突破硫代硫酸盐浸金液中金络合离子难以回收的技术瓶颈,是未来硫代硫酸盐提金技术的主要发展方向。The main methods of Au(S2O3)23-recovery from thiosulfate leaching are introduced in detailed,attempting to develop a simple and efficient Au(S2O3)23-recovery technology to promote the large-scale industrial application of environmental-friendly thiosulfate leaching for gold extraction technology,and then to achieve a non-cyanide extraction of gold. The methods of Au(S2O3)23-recovery including replacement precipitation,adsorption,solvent extraction and electrolytic deposition are described in detail. The advantages,disadvantages and problems of each method are also summarized. The traditional activated carbon and meso-porous silicon adsorbent have weak affinity for Au(S2O3)23-. Although the modification treatment can improve its adsorption capacity for Au(S2O3)23-to a certain extent,the treatment process is complicated and the cost is high. The resin method can better enrich Au(S2O3)23-in the leaching solution,but this method has the disadvantages of difficult elution of Au(S2O3)23-,expensive resin,and easy poisoning and pulverizing. The solvent extraction method is suitable for high-concentration gold leaching solution,and the method has high requirements for solution environment such as pH,which the process is complicated,and the cost is high. The replacement precipitation method and the electrodeposition method can directly obtain the gold,but these two methods have certain requirements on the concentration of Au(S2O3)23-in the leaching solution,and the co-precipitation of other metals in the multi-component leaching solution seriously affects the purity of the gold. Among the above recovery methods,the adsorption method has the most industrial application prospects due to the advantages of low cost,simple operation,and recyclability of the adsorbent,but the existing adsorbent cannot effectively recover Au(S2O3)23-in the thiosulfate leaching solution. Therefore,the development of a new and efficient Au(S2O3)23-adsorbent to break through the technical bottleneck of thiosulfate gold leaching solution in which Au(

关 键 词：硫代硫酸盐提金 金回收 置换 吸附 萃取 

分 类 号：TD926.5[矿业工程—选矿]