无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (11): 45-.

• 论文 • 上一篇    下一篇

尾矿酸浸液除锰工艺条件研究

褚志鹏1,陈学安1,常新安1,肖卫强2,王少华3   

  1. 1.北京工业大学材料科学与工程学院,北京100124;2.北京工业大学固体微结构与性能研究所;3.金川集团公司化工厂
  • 出版日期:2012-11-10 发布日期:2012-11-09

Study on technological conditions of removal of manganese from acid leaching filtrate of tailings

Chu Zhipeng1,Chen Xuean1,Chang Xin′an1,Xiao Weiqiang2,Wang Shaohua3   

  1. 1.School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;
    2.Institute of Microstructure and Property of Advanced Materials,Beijing University of Technology;
    3.Chemical Plant of Jinchuan Group Ltd.
  • Online:2012-11-10 Published:2012-11-09

摘要: 金川公司尾矿酸浸液中除含有较高含量的铁和镁之外,还含有一定量的杂质锰。应用热力学原理计算并分析了硫酸锰与次氯酸钠反应的活性,以次氯酸钠为氧化剂、氧化镁为中和剂,通过正交设计与实验,得到了从该酸浸液中除锰的最佳工艺条件,并进行了除锰实验。将除锰滤液进一步除钙以及蒸发浓缩、冷却结晶得到了七水硫酸镁,其主含量为98.4%(质量分数),符合HG/T 2680—2009《工业硫酸镁》I类一等品质量指标。

关键词: 尾矿酸浸液, 除锰, 氧化剂, 七水硫酸镁

Abstract: The acid leaching filtrate of tailings from Jinchuan Company contains not only large amount of Fe2+ and Mg2+,but also small amount of Mn2+ impurity.The reactive activity of MnSO4 with NaClO was thermodynamically calculated and analyzed. Moreover,with NaClO as oxidant and MgO as neutralizer,the optimum technological conditions of removal of manganese from the acid leaching filtrate were obtained by orthogonal experiments.Under the optimum conditions manganese was removed.Subsequently,Ca was further eliminated through heat filtration and MgSO4·7H2O was prepared by cooling and crystallizing the filtrate.Purity of the as-prepared MgSO4·7H2O was 98.4%(mass fraction),which can be classified as the first-rate product of type I according to the standard of HG/T 2680—2009.

Key words: acid leaching filtrate of tailings;removal of manganese;oxidizer;MgSO4·, 7H2O

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