2013•Applied Chemical IndustryRequires access
Study on pyrolusite dioxide vanadium from stone coal in acid leaching
Yangwen Liu
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Abstract
Vanadium was extracted out of pyrolusite oxidizing stone coal vanadium ore by H2SO4 acid leaching.Manganese dioxide of pyrolusite was used as the oxidant.Effects of oxidant dosage,sulfuric acid mass concentration,liquid-solid ratio,leaching temperature,leaching time on vanadium leaching rate were investigated.The results showed that under the extraction conditions of amount of vanadium:amount of manangese was 1∶ 2,liquid-solid ratio was 1∶ 1,leaching time was 10 h,sulfuric acid mass concentration was 30%,leaching temperature was 90 ℃.The vanadium leaching rate could reach 99.01%,the manganese leaching rate could reach 98.32%.