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MAGNESIUM, TITANIUM, RARE METALS, SEMICONDUCTORS
ArticleName Technology of complex processing of vanadium-containing converter slags with extraction of vanadium pentoxide of increased purity and manganese oxides
ArticleAuthor Krasheninin A. G., Khalezov B. D., Vatolin N. A., Bornovolokov A. S.
ArticleAuthorData

Institute of Metallurgy of Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia:

A. G. Krasheninin, Researcher, e-mail: agkrash@mail.ru
B. D. Khalezov, Leading Researcher
N. A. Vatolin, Chief Researcher

 

JSC “VSMPO-AVISMA Corporation”, Verkhnaya Salda, Russia:

A. S. Bornovolokov, Leading Processing Engineer

Abstract

Russia is one of the leading countries in reserves of vanadium, which is included into the composition of titanomagnetite ores. Vanadium concentrate (technical vanadium pentoxide with 80–90% content of basic substance) and ferrovanadium are only produced in Russia. Metallurgical slags from titanomagnetite smelting, containing vanadium and manganese, are raw materials for these products manufacturing. Russian titanium industry covers its own requirements in pure vanadium pentoxide and manganese through import of these materials. The new technology of pure vanadium pentoxide production from manganese vanadium-containing slags was developed in the Institute of Metallurgy of the Ural Branch of Russian Academy of Sciences. Production of vanadium pentoxide and manganese with increased purity, as well as ecological aspects and complex usage of raw materials, are considered to be the fundamental conditions for new technology development. The oxidized roasting at T = 850 оС without any Ca- and Na-containing additions is adopted in the technology of manganese vanadium slags processing in distinction to other existing technologies. Vanadium selective leaching in strong solutions of soda (ash) is made at the first stage of processing to obtain vanadium pentoxide of 99.6–99.8% purity. At the second stage, manganese is extracted via sulphate leaching from residues (cakes) after vanadium leaching. Manganese solution is obtained as a result of the operations of the mother liquor cleaning with removal of impurities. Manganese oxides of increased purity are precipitated from this. The obtained vanadium pentoxide and manganese oxides can be used in smelting of vanadium- and manganese-containing alloying compositions for production of titanium and aluminium alloys. The solid residues are used in ferroalloys production and in construction industry. Hence the new technology of manganese converter slags processing is claimed as ecological clean one and can provide the complex usage of raw materials. This technology can also meet the requirements of Russian titanium and aluminium industries in vanadium- and manganese-containing alloying additives.

keywords Hydrometallurgy, converter slag, selective leaching, vanadium, manganese, raw materials complex processing
References

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2. Vatolin N. A., Khalezov B. D., Nezhivykh V. A., Leontev L. I. Sposob izvlecheniya vanadiya iz rastvorov (Method of vanadium extraction from solutions). Patent RF, No. 2248407. Applied: July 02, 2003. Published: March 20, 2005.
3. Vatolin N. A., Khalezov B. D., Nezhivykh V. A. et al. Sposob pererabotki vanadiysoderzhashchikh shlakov (Method of processing of vanadium-containing slags). Patent RF, No. 2263722. Applied: May 25, 2004. Published: November 10, 2005.
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6. Vatolin N. A., Khalezov B. D., Krasheninin A. G. et al. Problemy chernoy metallurgii i materialovedeniya — Problems of Ferrous Metallurgy and Materials Science. 2008. No. 4. pp. 72–75.
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11. Polozhitelnoe reshenie na zayavku 2011152610/02(078986) (Positive reaction on the application No. 2011152610/02(078986)). Applied: November 08, 2012.

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