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无氨硫代硫酸盐浸出—树脂吸附提金工艺试验研究
- 作者：
张磊，郝福来，张世镖
- 作者单位：
- （长春黄金研究院有限公司）
基金项目：
- 国家重点研发计划项目（2023YFC2907803）
详细信息：
- 作者简介：
- 张 磊（1985—），男，高级工程师，博士研究生，研究方向为稀贵金属资源化利用；E⁃mail：ccgrixy@chncgri. cn
- PDF下载
Experimental study on ammonia‑free thiosulfate leaching-resin adsorption gold extraction process
- English Author：
Zhang Lei, Hao Fulai, Zhang Shibiao
- Unit：
- （Changchun Gold Research Institute Co., Ltd.）
- 摘要
- 在线预览
- 参考文献
摘要:
针对无氨硫代硫酸盐浸出—树脂吸附提金工艺中硫代硫酸盐易氧化分解、硫代硫酸金络合物稳定性差及传统活性炭吸附法效率低等问题，发现由浸金剂CG528、氧化剂CG525、络合剂CG524和催化剂CG527形成的药剂体系中，药剂之间产生协同作用，构建高效稳定的无氨硫代硫酸盐浸出体系；同时，研制出将树脂直接加入浸出矿浆中使之边浸边吸，无须对矿浆进行固液分离就可实现金富集回收的树脂吸附工艺。结果表明：采用无氨硫代硫酸盐浸出—树脂吸附提金工艺金浸出率（86.58 %）与氰化工艺金浸出率（86.32 %）相当；液相中金吸附率为 95.69 %。研究结果可为无氨硫代硫酸盐浸出—树脂吸附提金工艺的工业化应用提供技术支撑。
关键词:
无氨；硫代硫酸盐；树脂；浸出；氰化；矿浆；工艺机理
Abstract:
To address key challenges in the ammonia⁃free thiosulfate leaching-resin adsorption gold extractionprocess, such as the easy oxidative decomposition of thiosulfate, the low stability of thiosulfate-gold complexes, and thelow efficiency of conventional activated carbon adsorption, a novel reagent system composed of leaching agent CG528,oxidant CG525, complexing agent CG524, and catalyst CG527 was developed. This system exhibits synergistic effectsamong its components, forming an efficient and stable ammonia⁃free thiosulfate leaching system. Meanwhile, a resinadsorption technique was established, whereby resin is directly added to the leaching slurry to enable simultaneousleaching and adsorption, eliminating the need for solid⁃liquid separation and achieving effective gold enrichment andrecovery. Results show that the gold leaching rate using the ammonia⁃free thiosulfate leaching-resin adsorption goldextraction process reaches 86.58 %, comparable to the cyanidation leaching rate of 86.32 %, with a gold adsorption ratefrom the solution of 95.69 % . These findings provide technical support for the industrial application of the ammo⁃nia⁃free thiosulfate leaching-resin adsorption gold extraction process.
Keywords:
ammonia⁃free; thiosulfate; resin; leaching; cyanidation; slurry; process mechanism
