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›› 2002, Vol. 2 ›› Issue (6): 0-0.

• 6 •    

微山稀土精矿经固氟后采用氯化铵法回收稀土

时文中，朱国才，张志庚，王竞研，池汝安   

  1. (1. 清华大学核能技术设计研究院，北京102201; 2. 驻马店师范高等专科学校化学系, 河南 驻马店 463000
  • 出版日期:2002-12-20 发布日期:2002-12-20

Recovery of RE from Weishan Rare Earth Concentrate with Chlorination Roasting after Fluorine-fixing Treatment

SHI Wen-zhong1,2, ZHU Guo-cai1，ZHANG Zhi-geng1, WANG Jing-yan1, CHI Ru-an1   

  1. 1. Institute of Nuclear Energy Technology, Tsinghua University, Beijing 102201, China; 2. Chemistry Department, Zhumadian Teacher’s College, Zhumadian, Henan 463000, China
  • Online:2002-12-20 Published:2002-12-20

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被引次数

18

摘要： 微山稀土精矿经固氟后，采用氯化铵法回收稀土. 通过单因素条件实验确定了矿物固氟和氯化焙烧的较宜条件：固氟温度为550℃，固氟剂用量与精矿质量比为1:20，固氟焙烧时间50 min; 氯化剂用量与精矿质量比为1.2:1，氯化焙烧温度480℃，氯化时间60 min. 在较宜条件下，稀土的浸出回收率在87.8%以上. 利用X射线衍射探讨了固氟过程中可能发生的反应.

关键词: 稀土, 精矿, 固氟, 氯化铵焙烧法

Abstract: A process for recovery of RE from the Weishan rare earth concentrate was developed by incorporation of fluorine-fixing and RE concentrate chlorinating with ammonium chloride. The suitable conditions were determined as follows: Fluorine-fixing time of 50 min, MgO dosage mMgO/more=1:20 at 550oC. Chlorinating the fluorine-fixed calcine by 60 min, with NH4Cl dosage mNH4Cl/more=1.2:1 at 480oC, the leaching recovery of RE reaches 87.8% under the above conditions. The possible reactions in the fluorine-fixing process were discussed with the X-ray diffraction spectrum.

Key words: rare earth, concentrate, fluorine fixing, NH4Cl roasting treatment

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