Pressure acid leaching of black shale for extraction of vanadium

被引：26

作者：

Li Min-ting ^{[1
]}

Wei Chang ^{[1
]}

Fan Gang ^{[1
]}

Li Cun-Xiong ^{[1
]}

Deng Zhi-gan ^{[1
]}

Li Xin-bin ^{[1
]}

机构：

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

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷

关键词：

pressure acid leaching; black shale; vanadium; catalyst; SANDS FLY-ASH; OIL; CATALYSTS; RECOVERY; SULFUR;

D O I：

10.1016/S1003-6326(10)60023-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Extraction of vanadium from black shale was attempted in pressure acid leaching. The chemical components of the sample obtained from Guizhou Province of China show that it contains 3.258% V2O5, 52.880% SiO2 and 16.140% Al2O3. Phase analyses of vanadium indicates vanadium mainly exists in the free oxide and mica. Vanadium contents in the two phases are 18% and 53%, respectively. The contents of V3+, V4+ and V5+ are almost equal. Under the optimum parameters of one-step leaching (reaction time of 3 h, sulfuric addition of 25%, temperature of 150 degrees C, liquid to solid ratio of 1.2 mL/g, catalyst (FeSO4) addition of 5% and size of 85% particle 0.074 mm), about 77% of vanadium is recovered. After two-step countercurrent leaching, the leach recovery of vanadium can reach above 90%. Air replacing oxygen is completely feasible. The impurity metals can dissolve into solution in different degrees.

引用

页码：S112 / S117

页数：6

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