Physicochemical aspects of carbothermic reduction of cassiterite in the ionic melt

Conditions of the carbothermic reduction of the cassiterite concentrate in the melt of the Na 2 CO 3 -NaNO 3 salt system (weight ratio 1: 0.3) are investigated. The charge composition is established, and the temperature range of reduction (600–900°C) is determined. It is shown that the intermediate...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2009-12, Vol.50 (6), p.596-599
Main Authors: Komkov, V. G., Gostishchev, V. V., Ri, E. Kh
Format: Article
Language:English
Subjects:
Carbon monoxide
Carbothermic reactions
Cassiterite
Chemistry and Materials Science
Concentration (composition)
Materials Science
Melts
Metallic Materials
Metallurgy of Nonferrous Metals
Nonferrous metals
Reduction
Weight reduction
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Summary:Conditions of the carbothermic reduction of the cassiterite concentrate in the melt of the Na 2 CO 3 -NaNO 3 salt system (weight ratio 1: 0.3) are investigated. The charge composition is established, and the temperature range of reduction (600–900°C) is determined. It is shown that the intermediate Na 2 SnO 3 compound is formed during the interaction of cassiterite with the melt. This compound is mainly reduced by gaseous CO in a liquid phase of the melt with a high rate (1.5 h), thereby providing the recovery of 97% Sn from the cassiterite concentrate into the crude alloy.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821209060066