Solid-phase prereduction of iron-vanadium concentrates and liquid-phase separation of the products of their reduction |
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Authors: | V E Roshchin A V Asanov A V Roshchin |
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Affiliation: | 1.Southern Ural State University,Chelyabinsk,Russia |
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Abstract: | The transformations that occur in ore grains during solid-phase carbon reduction of the metals from the iron-vanadium concentrates
formed upon the beneficiation of the titanomagnetite ores from Southern Ural deposits are studied. Upon heating to 1000°C,
the solid solution in titanomagnetite grains decomposes with the formation of magnetite and ilmenite; the reduction of iron
begins in the temperature range 1080–1110°C, and the reduction of titanium begins at above 1215°C. The reaction mixture should
be held at 1250°C for 45 min to ensure almost complete iron reduction and the minimum degree of titanium reduction. For rapid
separation melting, this procedure results in vanadium-containing cast iron (0.43–0.5% V) with <0.15% Ti and a slag with 42–43%
titanium oxides. |
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