期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 20, 期 -, 页码 S112-S117出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(10)60023-4
关键词
pressure acid leaching; black shale; vanadium; catalyst
资金
- Hi-tech Research and Development Program of China [2006AA06Z130]
- Yunnan Provincial Science and Technology Agency [2007GA010]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据