Extraction of vanadium from black shale using pressure acid leaching

被引：98

作者：

Li, Minting ^{[1
]}

Wei, Chang ^{[1
]}

Fan, Gang ^{[1
]}

Li, Cunxiong ^{[1
]}

Deng, Zhigan ^{[1
]}

Li, Xingbin ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Mat & Met, Kunming 650093, Peoples R China

来源：

HYDROMETALLURGY | 2009年 / 98卷 / 3-4期

关键词：

Vanadium; Black shale; Pressure acid leaching; Solvent extraction; SOLVENT-EXTRACTION; RECOVERY; POLYVANADATES; CATALYST; OIL;

D O I：

10.1016/j.hydromet.2009.05.005

中图分类号：

TF [冶金工业];

学科分类号：

080601 [冶金物理化学];

摘要：

The extraction of vanadium from black shale was attempted using pressure acid leaching. The effects of the several parameters which included reaction time. concentration of sulfuric acid, leaching temperature, liquid to solid ratio and concentration of additive (FeSO4) upon leaching efficiency of vanadium were investigated and a two-step counter-current leaching approach was developed. The results showed that the leaching efficiency of vanadium in the two-step process could reach above 90%. Vanadium was effectively separated and enriched by solvent extraction after leachate pretreatments. including the reduction of Fe3+ and adjustment of pH value. The extraction and stripping yields of vanadium were both >98%. Ammonia was added to a stripping liquor to precipitate vanadium and then the ammonium poly-vanaclate produced was calcined at 550 degrees C for 3 h to produce the high purity V2O5 powder. The overall yield of vanadium through all process stages was about 85%. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

引用

页码：308 / 313

页数：6

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