新催化体系硫代硫酸盐法提金
Gold Extraction by Thiosulphate Leaching in New Catalytic System
李光胜 1吴金甜 2徐超 1朱幸福 1李鹏 3董中林 2徐斌2
作者信息
- 1. 山东黄金矿业科技有限公司选冶实验室分公司,山东 烟台 261441
- 2. 中南大学 资源加工与生物工程学院,湖南 长沙 410083
- 3. 山东黄金矿业股份有限公司,山东 济南 250103
- 折叠
摘要
为构建浸金效果好、硫代硫酸盐消耗低且浸出液中的金能被高效回收的新型浸金体系,比较了不同金属离子与有机配体组合催化硫代硫酸盐浸金的效果,并采用树脂吸附法回收浸出液中的金.结果表明,Ni2+-甘氨酸-硫代硫酸盐体系的Au浸出效果好,Au浸出率和硫代硫酸盐消耗分别为89.72%和15.28 kg/t.该体系浸金过程中,甘氨酸催化Au+与S2 O32-配位以及在碱性条件下稳定Ni2+,Ni(C2 H4 NO2)20 催化O2 的还原.采用树脂吸附法回收金时,浸出液中Ni离子几乎不会在树脂上吸附,不与Au离子产生竞争吸附,Au吸附率达 98.13%;载金树脂解吸时只需采用简单的一段工艺,即可直接解吸Au.
Abstract
In order to determine a new type of gold leaching system,which can not only bring good leaching effect with low consumption of thiosulfate,but also make the gold in the lixivium to be efficiently recovered,the leaching effects of gold with thiosulfate catalyzed by different combination of metal ions and organic ligands were compared,and then the gold in the lixivium was recovered by resin adsorption.The results indicate that the Ni2+-glycine-thiosulfate system can bring good Au leaching effect,showing Au leaching rate up to 89.72%with thiosulfate consumption of 15.28 kg/t.During the gold leaching process in this system,glycine catalyzes the coordination of Au+with S2 O32-and also stabilizes Ni2+under alkaline conditions,and Ni(C2 H4 NO2)20 catalyzes the reduction of O2.When Au is recovered by resin adsorption,Ni ions in the lixivium are hardly adsorbed on the resin,and do not compete with Au ions for adsorption,resulting in Au adsorption rate up to 98.13%.Then,only one-step process is required for desorption of gold-loaded resin,that is,Au can be directly desorbed.
关键词
金属离子/有机配体/吸附/解吸/催化体系/硫代硫酸盐法/树脂吸附/提金Key words
metal ion/organic ligands/adsorb/desorb/catalytic system/thiosulfate method/resin adsorption/gold extraction引用本文复制引用
基金项目
国家自然科学基金面上项目(52174271)
出版年
2024
NETL
NSTL
万方数据