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金属矿山 ›› 2008, Vol. 38 ›› Issue (04): 149-151.

• 综合利用 • 上一篇    下一篇

石煤提钒水浸渣酸浸液的除杂试验研究

吕纪霞,张一敏,刘涛,黄晶   

  1. 武汉理工大学
  • 收稿日期:2007-02-20 出版日期:2008-04-15 发布日期:2011-07-20

Experiment Research on Impurity Removal from Acid Leaching Solution of AqueousLeaching Residue in Vanadium Extraction from Stone Coal

Lu Jixia,Zhang Yimin,Liu Tao,Huang Jing   

  1. Wuhan University of Technology
  • Received:2007-02-20 Online:2008-04-15 Published:2011-07-20

摘要: 对石煤焙烧—水浸—树脂交换—解吸—铵盐沉钒—煅烧制五氧化二钒工艺中的水浸渣再用稀酸浸出,可使钒总浸出率提高10个百分点以上,但硅、铝、铁、磷等杂质也随钒进入酸浸液,影响后续沉钒。为此,以双氧水、铜铁试剂为掩蔽剂和除杂剂,对该含钒酸浸液进行了除杂净化试验。结果表明,当双氧水与酸浸液中钒的物质的量之比为15、铜铁试剂(1 g/L)与酸浸液的体积比为1∶8、酸浸液pH值为6.5时,酸浸液中的有害杂质去除比较彻底,钒损失率仅为15.52%,满足后续提钒要求。

关键词: 石煤提钒水浸渣, 酸浸液, 除杂净化, 双氧水, 铜铁试剂, 钒损失率

Abstract: Dilute acid leaching of the aqueous leaching residue from the process of stone coal roasting-aqueous leaching-resin exchange-desorption-vanadium precipitation by ammonium salt-vanadium pentoxide making by calcination can improve the total vanadium leaching rate by more than ten percentage points.However, impurities such as silicon, aluminum, iron, and phosphorous can also enter the acid leaching solution with vanadium, thus affecting the downstream vanadium precipitation.For this, hydrogen peroxide and cupferron were used as screening agent and agent for removing impurities in the test of purifying this vanadium-containing acid leaching solution.The results indicate that when the hydrogen peroxide and the vanadium in the solution are in a mass ratio of fifteen, cupferron (1 g/L)and the acid leaching solution are in a volumetric ratio of 1∶8 and the pH of the solution is 6.5, a relatively thorough removal of harmful impurities can be realized, with the vanadium loss being only 15.52%,satisfying the requirement of the downstream vanadium extraction.

Key words: Aqueous leaching residue of vanadium extraction from stone coal, Acid leaching solution, Impurity removal and purification, Hydrogen peroxide, Cupferron, Vanadium loss rate