Treatment of steel by vanadium converter slag with nitrogen injection
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When steel is treated with vanadium converter slag in the ladle–furnace unit, vanadium is extracted from its pentoxide by reaction with silicocarbon. A physicochemical model of the process is presented. Thermodynamic modeling permits the determination of the optimal consumption of slag and reducing agents for practically complete extraction of vanadium from vanadium converter slag. The injection of nitrogen into the steel in the course of alloying with vanadium improves the extraction of vanadium from the slag and the production of strengthening phases: vanadium carbides and carbonitrides. After dissolving in the metal, nitrogen reacts at the nano level with the reduced vanadium and its carbide, forming vanadium nitrides and carbonitrides.
Keywordsreduction silicocarbon vanadium converter slag physicochemical model thermodynamic modeling vanadium carbonitride nitrogen
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