氧化浸出镍钼矿冶炼烟尘中的硒
(1. 中南大学 冶金科学与工程学院，长沙 410083；2. 金川有色金属公司，金昌 737100)
摘 要: 对在H2SO4-HCl-H2O复合体系中氧化浸出镍钼矿冶炼烟尘中的硒进行热力学分析，确定从镍钼矿冶炼烟尘中浸出硒的新工艺及其最优技术参数。采用XRD对镍钼矿冶炼烟尘及其浸出渣进行表征。结果表明：在最佳技术条件下，硒浸出率达到98%，浸出渣含硒0.16%(质量分数)；冶炼烟尘中硒以单质形式存在，未见硒及其化合物出现，表明烟尘中的硒浸出较完全；浸出渣主要由SiO2、CaSO4、Al2SiO5、As2O3和KAlSi3O8组成。
关键字: 镍钼矿；硒；烟尘；氧化浸出；热力学
mixing solution system of H2SO4-HCl-H2O
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Jinchuan Nonferrous Metals Corporation, Jinchang 737100, China）
Abstract:The thermodynamics of oxidized leaching selenium from Ni-Mo ore smelter dust in mixing solution system of H2SO4-HCl-H2O was analyzed, and a novel process and its optimum parameters for leaching selenium from Ni-Mo ore smelter were determined. Both Ni-Mo ore smelter dust and its leaching residue were characterized by XRD. The results show that, under the optimum conditions, the leaching rate of selenium reaches 98%, and the selenium in leaching residue is only 0.16% (mass fraction). The selenium in smelter dust exists in the form of elemental selenium, but no selenium and its compounds are detected in leaching residue. The leaching residue is mainly composed of SiO2, CaSO4, Al2SiO5, As2O3 and KAlSi3O8, which indicates that the leaching of selenium is almost , complete.
Key words: Ni-Mo ore; selenium; smelter dust; oxidized leaching; thermodynamics
