In this research, selenium was selectively separated and recovered from copper anode slime by a hydrometallurgical-pyrometallurgy union process. In the first compound leaching process with H₂SO₄, HCl and NaCl media, the pre-removal of As, Sb, and Bi was achieved, and the removal efficiencies were 85 %, 83 %, and 91 %, respectively. Selenium was effectively enriched by approximately 200 % after first compound leaching. Sulfate roasting method was used to selectively separate selenium in the second stage. In this study, more than 99.39 % of selenium was separated with concentrated sulfuric acid amount to first leaching residues ratio (H₂SO₄/ first compound leaching residues ratio) of 0.30 mL/g at 500 °C for 25 min, which enabled selenium to be selectively separated from the other elements. The kinetics of sulfation roasting of Se-enriched residues show that the selective separation of selenium conforms to the Avrami multiphase liquid–solid region reaction, the activation energy of the reaction is 28.118 kJ/mol, and the reaction efficiencies equation is k = 3.607e^-3382/T, indicating that it is internal diffusion-controlled.

本研究采用湿法冶金-火法冶金联合工艺从铜阳极泥中选择性分离和回收硒。在H ₂ SO ₄ 、HCl和NaCl介质的第一次复合浸出过程中，实现了As、Sb和Bi的预去除，去除效率分别为85%、83%和91%。在第一次化合物浸出后，硒被有效地富集了大约 200%。第二阶段采用硫酸盐焙烧法选择性分离硒。在这项研究中，超过 99.39 % 的硒被用浓硫酸量与第一次浸出残渣比 (H ₂ SO ₄/ 第一化合物浸出残渣比）为 0.30 mL/g，在 500 °C 下持续 25 分钟，使硒能够与其他元素选择性分离。富硒渣硫酸化焙烧动力学表明，硒的选择性分离符合Avrami多相液固区反应，反应活化能为28.118 kJ/mol，反应效率方程为k = 3.607e ^-3382/T，表明它是内部扩散控制的。