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›› 2011, Vol. 11 ›› Issue (1): 56-60.

• 反应与分离 • 上一篇    下一篇

焙烧-浸出黄钾铁矾渣中多种有价金属

薛佩毅 巨少华 张亦飞 王新文   

  1. 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国矿业大学（北京）
  • 收稿日期:2010-12-03 修回日期:2011-01-13 出版日期:2011-02-20 发布日期:2011-02-20
  • 通讯作者: 张亦飞

Recovery of Valuable Metals by Leaching of Roasted Jarosite Residue

XUE Pei-yi JU Shao-hua ZHANG Yi-fei WANG Xin-wen   

  1. Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering,Chinese Academy of Sciences China University of Mining and Technology (Beijng)
  • Received:2010-12-03 Revised:2011-01-13 Online:2011-02-20 Published:2011-02-20
  • Contact: ZHANG Yi-fei

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摘要： 实验研究了中低温焙烧-NH4Cl浸出-碱浸同时回收湿法炼锌黄钾铁矾渣中有价金属及Fe的新工艺. 黄钾铁矾渣在650℃下焙烧1 h后，渣中Zn, Pb的主要物相KFe3(SO4)2(OH)6分解为Fe2O3, ZnSO4和PbSO4. 在105℃、液固比10:2(w)条件下用6 mol/L NH4Cl浸出2 h，Zn, Pb和Cd的浸出率均在95%以上，同时Fe含量由焙烧后的23.21%提高到40%. 所得浸出渣再于160℃下用23.08%(w)的NaOH溶液浸出1 h，Fe含量可提高到54%左右，且As含量可降低到0.1%. 最终的浸出渣可作为铁精矿使用.

关键词: 黄钾铁矾渣, 焙烧, 浸出, 有价金属, 回收, 铁精矿

Abstract: A new process of roasting-ammonium chloride leaching-alkali leaching for recovery of valuable metals and iron in jarosite residue generated during zinc hydrometallurgy was studied by experiment. After roasting of jarosite at 650℃ for 1 h, the main phase of KFe3(SO4)2(OH)6 containing Pb and Zn was decomposed into Fe2O3, ZnSO4 and PbSO4. When the roasted jarosite residue was leached by 5 times with aqueous solution of 6 mol/L ammonium chloride at 105℃ for 2 h, over 95% of Zn, Pb and Cd in the jarosite was leached and the iron content was raised from 22% to 40%. The leached residue was further leached with 23.08%(w) NaOH solution at 160℃ for 1 h, Fe content in the final residue was 54%, which could be used as qualified iron concentrate.

Key words: jarosite residue, roasting, leaching, valuable metal, recovery, iron concentrate

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