氧化剂对氰化体系下黄铁矿溶解行为的影响及机理

冶金工程 • 矿业工程 • 化学化工

氧化剂对氰化体系下黄铁矿溶解行为的影响及机理

赵前飞，

高鹏，

杨洪英，

佟琳琳，

张裕海，

袁帅

中国有色金属学报

第34卷, 第11期

pp.3822-3831

纸质出版 2024-11-28

DOI：10.11817/j.ysxb.1004.0609.2024-45015

中图分类号：TD982

7100

本文针对氰化过程金精矿中黄铁矿与氰化物作用特性，对比研究次氯酸钠、过氧化氢和过硫酸钠对黄铁矿的预氧化处理效果，并对黄铁矿溶解特性、氰化物消耗、硫氰酸根离子浓度及氧化渣表面物质组成变化进行了分析。结果表明：3种氧化剂均能抑制黄铁矿的氰化溶解，当以过硫酸钠为氧化剂时，氰化物的消耗量减少51.72%，硫氰酸根离子的生成量减少75.97%，同时氰化体系中的氧环境得到改善。但以次氯酸钠为氧化剂时，氯化物的释放导致氰化物的消耗量增加10.34%。SEM-EDS及XPS分析结果表明，氧化剂的使用导致黄铁矿表面形成了不与氰化物作用的FeO、FeSO₄和Fe₂(SO₄)₃，从而抑制了黄铁矿氰化溶解，优化了氰化提金系统的浸出环境。

黄铁矿氰化浸出氧化剂溶液化学界面理化性质

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