论文部分内容阅读
以TBP为萃取剂,用新型的柱状萃取装置对水相中加入与Au(I)等摩尔CTAB(十六烷基三甲基溴化铵)的低浓度氰化金溶液进行了萃取研究,考察了水相中添加CTAB、有机相TBP的体积、盐析剂NaCl浓度等对TBP萃取Au(I)性能的影响以及载金有机相中金的反萃取。结果表明:在水相中添加CTAB后,TBP对低浓度金的萃取性能大幅度提高;50L含金浓度约为10mg/L的氰化金溶液经3级萃取试验后,金的萃取率大于95%,萃余相浓度小于0.5×10-6。用硫氰化钾对含金浓度约为3g/L的载金有机相进行了反萃取研究,当KSCN浓度大于3mol/L时,对金的反萃率大于93%。
Using TBP as extractant, a new type of columnar extraction device was used to study the extraction of low concentrations of gold cyanide solution with equimolar CTAB (cetyltrimethylammonium bromide) in Au (I) aqueous solution. The effects of adding CTAB, the volume of TBP in the organic phase, the concentration of salting-out agent NaCl on the performance of Au (I) extraction by TBP, and the stripping of gold in the gold-supported organic phase were investigated. The results showed that the extraction performance of TBP for low concentration of gold increased greatly after the addition of CTAB in the aqueous phase. The extraction rate of gold was greater than 95 after the extraction of 3L of gold cyanide solution with 50L gold concentration of about 10mg / L %, The raffinate phase concentration is less than 0.5 × 10-6. The back-extraction of gold-bearing organic phase with a gold concentration of about 3 g / L by potassium thiocyanate was carried out. When KSCN concentration was more than 3 mol / L, the stripping ratio of gold was more than 93%.