2013•Hunan Nonferrous MetalsRequires access
Process for Vanadium Extraction from Vanadium Ore in West of Hunan Province
Liu Zhen-na
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Abstract
Recovery of vanadium pentoxide from stone coal vanadium ore in west of Hunan province has been studied. The influence of percentage of additives,roasting temperature,roasting time,particle size of the ore,sulfuric acid volume,leaching temperature and leaching time on leaching rate was investigated. The experimental results showed that with the vanadium ore particle size of- 74 μm more than 71%,the stone coal was roasted at 870 ℃ for 4 h without additives,the leaching rate of vanadium can be more than 87% after the obtained calcine was leached at 25 ℃ for 1h in a solution with sulfuric acid dosage of 1%. V 2 O 5 was recovered from the leach solution of vanadium by the technology of resin absorption-vanadium precipitation-calcination,with main technical indicators all reaching standards( YB / T5304- 2006) for metallurgy 99. Vanadium overall recovery was 84. 5%.