Solubility of vanadium from manganese vanadates in aqueous solutions of soda ash

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• 作者：B. D. Khalezov ; A. G. Krasheninin ; N. A. Vatolin…
• 刊名：Russian Metallurgy (Metally)
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：2016
• 期：5
• 页码：409-412
• 全文大小：254 KB
• 刊物主题：Metallic Materials;
• 出版者：Springer US
• ISSN：1555-6255
• 卷排序：2016

文摘

It is shown that, in the course of developing the technology of pure vanadium pentoxide preparation from manganic vanadium-containing metallurgical slags, their oxidative roasting and cinder formation without alkaline additives are accompanied by the decomposition of spinelides with the formation of manganese meta- and pyrovanadates. Concentrated aqueous solutions of soda ash with an Na₂CO₃ concentration of 120–150 g/dm3 are accepted as a selective leaching reagent for vanadium from a cinder. Manganese metaand pyrovanadates are synthesized, and the procedure of their preparation is presented. The solubility of vanadium from manganese vanadates in aqueous solutions of soda ash at \(C_{Na_2 CO_3 } = 150 g/dm^3 \) is studied at 20–95°C for pyrovanadate and at 85–95°C for metavanadate. It is shown that vanadium should be leached from converter manganic slags roasted without alkaline metal additives at a leaching solution temperature higher than 95°C. There is a possibility to increase the vanadium content in a leaching solution to 60–80 g/dm3. The results obtained are used in the development of the technology of vanadium leaching.