Extraction of vanadium from black shale using pressure acid leaching
Extraction of vanadium from black shale using pressure acid leaching
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加压酸浸从黑色页岩中提取钒
DOI：
10.1016/j.hydromet.2009.05.005
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发表时间：
2009-09-01
期刊：
影响因子：
4.7
通讯作者：
Li, Xingbin
中科院分区：
文献类型：
--
作者：
Li, Minting;Wei, Chang;Li, Xingbin
尝试用加压酸浸法从黑色页岩中提取钒。包括反应时间在内的几个参数的影响。考察了硫酸浓度、浸出温度、液固比和添加剂浓度(FeSO4)对钒浸出效率的影响，提出了两步逆流浸出工艺。结果表明，两步法钒的浸出率可达90%以上。渗滤液经过预处理后，用溶剂萃取法可以有效地分离和富集钒。包括还原Fe3+和调节pH值。钒的萃取率和反萃率均为98%。在汽提液中加入氨水沉淀钒，生成的聚钒酸铵在550℃下焙烧3h，即可得到高纯度的V2O5粉末。各工序钒的总收率约为85%。皇冠版权所有(C)2009由爱思唯尔出版。保留所有权利。
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.