某石煤矿浓酸熟化两段逆流浸出钒的研究

以湖南岳阳某石煤钒矿为原料,对其进行了浓酸熟化处理和两段逆流浸出提钒研究。结果表明,首先在硫酸加入量26%、物料粒度-2.0mm、熟化温度150℃、熟化时间3.5h条件下进行熟化,熟化料随后在常温下按液固比1.5∶1进行两段逆流浸出,每段浸出时间为3.0h,矿石中钒总浸出率可达94%左右,该流程具有无焙烧烟尘污染、钒浸出率高、工艺流程简单等优点。

Study on Vanadium Extraction from Stone Coal with Acid Curing and Two Stage Countercurrent Leaching Process

Extracted first from stone coal in Yueyang,Hunan province with acid curing,vanadium was then leached by two-stage countercurrent extraction process.The results show that the raw material is first treated with curing process under the conditions including dosage of sulfuric acid of 26%,particle size of-2.0mm,curing temperature of 150℃,and curing time of 3.5h.The total vanadium leaching rate is about 94%after the curing material is leached at room temperature with two stage countercurrent process under the conditions including ratio of liquid to solid of 1.5∶1and leaching time for each stage of 3.0h.This process has the advantages of no roasting dust pollution,high vanadium leaching rate,simple of flowsheet and etc.