The high consumption of the outstanding non-cyanide lixiviant, thiosulphate, has been a technical bottleneck hindering its industrial application. The self-generation of thiosulphate from sulfur-containing minerals at atmospheric pressure can solve this technical bottleneck, but this process will inevitably cause the volatilization of sulfur, which makes the sulfur utilization lower. Excitingly, this paper has achieved the production of thiosulphate from volatile sulfur as described above and successfully applied it to the entire gold extraction process. Hence, this manuscript initially elucidates the process mechanism of thiosulfate derived from volatile sulfur, achieving a thiosulfate concentration of 0.44 M with optimal process parameters. Additionally, the sulfur migration pathway is S → SO → SO → SO → SO → SO. Subsequently, the generation kinetics fitting results suggest that the oxidation process is controlled by different surface chemical reactions (30 → 70 °C: a = 41.06 kJ/mol, 70 → 80 °C: a = 37.61 kJ/mol). Furthermore, a gold extraction percentage of 87.23 % was achieved. Then, 99.41 % of copper and 98.63 % of gold were effectively desorbed from the loaded resin in the actual pregnant solution, respectively. This fruitful research has opened up another promising avenue for the generation of thiosulfate at atmospheric pressure, achieving high-value utilization of sulfur in sulfur-containing minerals and significantly advancing the commercialization of non-cyanide gold extraction using self-generated thiosulfate.

中文翻译：

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绿色浸提剂硫代硫酸盐挥发性硫的制备：生成机理及其在提金中的应用

硫代硫酸盐是一种优秀的非氰浸滤剂，其消耗量高一直是阻碍其工业化应用的技术瓶颈。含硫矿物在常压下自生成硫代硫酸盐可以解决这一技术瓶颈，但这一过程不可避免地会造成硫的挥发，使得硫的利用率较低。令人兴奋的是，本文实现了如上所述的由挥发性硫生产硫代硫酸盐，并成功应用于整个黄金提取过程。因此，该手稿初步阐明了挥发性硫衍生硫代硫酸盐的工艺机理，在最佳工艺参数下实现了硫代硫酸盐浓度为0.44 M。此外，硫迁移途径为S→SO→SO→SO→SO→SO。随后，生成动力学拟合结果表明，氧化过程是由不同的表面化学反应控制的（30 → 70 °C：a = 41.06 kJ/mol，70 → 80 °C：a = 37.61 kJ/mol）。此外，金提取率达到87.23%。然后，99.41%的铜和98.63%的金分别从实际母液中负载的树脂中有效解吸。这项卓有成效的研究为常压生成硫代硫酸盐开辟了又一条有前景的途径，实现了含硫矿物中硫的高值利用，极大地推进了自生硫代硫酸盐无氰提金的商业化。