磨矿介质对方铅矿氰化浸出行为的影响

以氧化锆及普通铸铁研磨球为球磨介质，采用化学法和分析测试技术系统研究了磨矿介质对方铅矿氰化浸出过程中矿浆和界面性质变化的影响.结果表明:与铁球介质相比，瓷球介质的使用能够降低NaCN的消耗，同时减少SCN^-的产生，溶解氧含量明显较高.通过扫描电子显微镜结合能量色散光谱(SEM-EDS)与X射线光电子能谱(XPS)对方铅矿表面形貌及元素组成分析，发现铁介质导致方铅矿表面形成了更多的含氧絮凝体FeOOH和Fe₂(SO₄)₃.结合接触角测试结果发现，使用铁球介质磨矿的方铅矿表面因为铁屑的附着呈亲水性质；且由于氰化作用，方铅矿亲水性增加，不利于后续的浮选回收.

Effect of Grinding Media on Cyanide Leaching Behavior of Galena

Using zirconia and common cast-iron grinding balls as ball milling media， the effects of grinding media on the variations of pulp and interface properties in the process of galena cyanidation was systematically investigated by chemical and analytical testing techniques. The results show that the use of ceramic ball media can reduce the consumption of NaCN compared to iron bass media， while the generation of SCN^- was reduced and the dissolved oxygen content was significantly higher. The analysis of the surface morphology and element composition of galena by scanning electron microscopy combined with energy dispersive spectroscopy(SEM-EDS)and X-ray photoelectron spectroscopy(XPS)revealed that the iron ball media resulted in more formation of oxygenated flocs of FeOOH and Fe₂(SO₄)₃ on the galena surface. In combination with the contact angle test results， it was found that the surface of galena ground with iron ball media was hydrophilic due to the adhesion of iron filings; and the increased hydrophilicity of galena due to cyanidation was not conducive to subsequent flotation recovery.