Abstract
CaCO3 thermal decomposition produces CO2 and CaO, and CO2 can be used as a weak oxidant in vanadium extraction . CaO will also affect the vanadium extraction process. This experiment, taking self-blowing and temperature acquisition experiment system, through adding different quality CaCO3, studies the molten iron in the oxidation behavior of C, V and P and its impact, and analysis of CaCO3 decomposition of the heating effect of the molten pool. The result indicates that adding CaCO3 in the vanadium extraction process had no obvious effect on the oxidation of carbon, but partly increased vanadium oxidation which reached more than 90%. Increased CaCO3 additions also increased cooling the molten pool, with a maximum decrease in temperature of 20 K. In addition, the oxidation of P also increased, reaching 40%. The research has proved that CaCO3 can serve to oxidize V and P is effective in vanadium extraction.
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