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 ›› 2019, Vol. 51 ›› Issue (3): 57-58.

• 工业技术 • 上一篇    下一篇

磷矿脱镁废液制备氟化镁工艺研究

孔小雁,黄忠,余莹,居丽,梁蕾,何俊   

  1. 湖北祥云(集团)化工股份有限公司,湖北武穴 435400
  • 收稿日期:2018-09-19 出版日期:2019-03-10 发布日期:2020-05-09
  • 作者简介:孔小雁(1985— ),男,硕士研究生,工程师,从事磷化工技术开发;E-mail: 327173392@qq.com。

Study on the preparation of magnesium fluoride from demagging liquor of phosphate ore

Kong Xiaoyan,Huang Zhong,Yu Ying,Ju Li,Liang Lei,He Jun   

  1. Hubei Xiangyun(Group) Chemical Co.,Ltd.,Wuxue 435400,China
  • Received:2018-09-19 Published:2019-03-10 Online:2020-05-09

摘要:

低品位磷矿脱镁会产生大量废液,主要含有镁离子、磷酸根、钙离子、二价铁离子、铝离子、硫酸根等。研究了以脱镁废液为原料,通过预处理脱除杂质离子后加入氟化铵溶液制备氟化镁的方法。脱镁废液除杂优化条件:pH为9.0~9.5,反应温度为60 ℃。在此条件下溶液中磷酸根、钙离子、二价铁离子、铝离子脱除率分别为96.89%、95.41%、100%、100%。复分解反应优化条件:反应温度为60 ℃,干燥温度为300 ℃。通过此方法制得的氟化镁符合YS/T 691—2009《氟化镁》中MF-2的要求,氟收率为92%以上。该制备工艺简单,原料利用率高,具有较高的经济效益。

关键词: 脱镁废液, 氟化镁, 氟化铵

Abstract:

:Waste liquid produces from the demagging of low grade phosphate ore, mainly containing magnesium,phosphate,calcium,ferric,aluminum,and sulfate plasma etc..The method of preparing magnesium fluoride by adding ammonium fluo-ride solution after removing impurity ion from magnesium removal waste solution by pretreatment was studied.The optimized purification conditions of demagging liquor were:pH 9.0~9.5,and the reaction temperature of 60 ℃.Under these conditions,the removal rates of phosphate,calcium,ferric and aluminum ions were 96.89%,95.41%,100% and 100%,respectively.Double decomposition reaction optimization conditions:reaction temperature was 60 ℃,and the drying temperature was 300 ℃.The magnesium fluoride obtained through this process conformed to the requirements of MF-2 specified in the Stan-dard,YS/T 691—2009,with a fluorine yield of over 92%.This method had high economic benefits as its process was simple and its utilization rate of raw material was high.

Key words: demagging liquor, magnesium fluoride, ammonium fluoride

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