Comprehensive recovery of Sn-Cu bearing residue and preparation of high purity SnO2 and CuSO4？5H2O
- 点击次数：
- 影响因子：7.312
- DOI码：10.1016/j.seppur.2020.117826
- 发表刊物：Separation and Purification Technology
- 关键字：Tin, Copper, Pressure leaching, Recovery, Hydrometallurgy
- 摘要：In the production of tin, much Sn-Cu bearing residue is yielded, and it is an important secondary resource for Sn and Cu recovery but has the disadvantages of a low metal recovery rate and low-concentration SO2 pollution. In this study, alkaline pressure oxidative leaching (APOL) was proposed to dispose of the Sn-Cu bearing residue. Tin was first dissolved as sodium stannate into the filtrate and used for SnO2 synthesis via a hydrothermal process, while copper sulfides were oxidized to copper oxide, and used for CuSO4⋅5H2O preparation via acid leaching-evaporative crystallization. Under the optimized leaching conditions of APOL, the leaching efficiencies of Sn, As, and S approached 93.42%, 98.82%, and 97.99%, while the leaching efficiency of copper was only 1.60%, which results in the efficient extraction of tin, desulfurization, dearsenification, and separation of tin and copper.
The product SnO2 had a purity higher than 99.86%, a morphology of irregular shape, and a mean size of 2.68 μm. Meanwhile, the purity of prepared CuSO4⋅5H2O reached 99.98% with a morphology of irregular rods. Both valuable metals are economically and efficiently recycled by this environmentally friendly method.
- 论文类型：期刊论文
- 学科门类：工学
- 文献类型：J
- 卷号：257
- 页面范围：117826
- 是否译文：否
- 发表时间：2021-02-25
- 收录刊物：SCI
附件：
Comprehensive recovery of Sn-Cu bearing residue and preparation of high purity SnO2 and CuSO4？5H2O-08.pdf
