Recovery and Separation of Vanadium and Chromium by Two-Step Alkaline Leaching Enhanced with an Electric Field and H2O2

被引：23
作者：
Peng, Hao [1 ]
Yang, Liu [1 ]
Chen, Ya [1 ]
Guo, Jing [1 ]
Li, Bing [1 ]
机构：
[1] Yangtze Normal Univ, Chongqing Key Lab Inorgan Special Funct Mat, Coll Chem & Chem Engn, Chongqing 408100, Peoples R China
来源：
ACS OMEGA | 2020年 / 5卷 / 10期
关键词：
SLAG; EXTRACTION; KINETICS; DECOMPOSITION;
D O I：
10.1021/acsomega.9b04346
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This paper focused on the treatment of vanadium-chromium reducing residue with a two-step alkaline leaching process: electro-oxidation leaching of vanadium and H2O2 as well as oxidation leaching of chromium in an alkaline medium. The effects of experimental parameters on the leaching performance of vanadium and chromium were investigated. The experimental data showed that in the first alkaline leaching in stage I, the leaching efficiency of vanadium reached up to 95.32% under optimal conditions, while most of the chromium could not leach out (about 4% of chromium was leached out). Chromium was easily oxidized to high valence (CrO42-) with H2O2 in the second alkaline leaching stage II. Under optimal conditions, 96.24% chromium was leached out.
引用
收藏
页码：5340 / 5345
页数：6
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