2011•Mining and Metallurgical EngineeringRequires access
Process for Vanadium Extraction from Vanadium-bearing Stone Coal
Zhou Zai-xing
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Abstract
According to the characteristics of the vanadium-bearing stone-coal in West of Hunan Province,a roasting-acid leaching technology by adding X as additives was adopted for extracting vanadium from stone coal.The influence of percentage of additives,roasting temperature,roasting time,sulfuric acid volume,leaching temperature and leaching time upon leaching rate was investigated.The experimental results showed that while the stone coal was roasted at 750 ℃ for 2 h with the dosage of additive X being 9%,the leaching rate of vanadium can be more than 95% after the obtained calcine was leached at 50 ℃ for 4 h in a solution with sulfuric acid dosage of 2%.V2O5 was recovered from the leach solution of vanadium by the technology of resin absorption-vanadium precipitation-calcination,with main technical indicators all reaching standards(GB3283-87) for chemical vanadium powder.