Industrial Techniques

Study on causticization and purification of salt lake lithium ore and recovery of fluorine-containing lithium carbonate

  • Xinfang Xu ,
  • Xiaoping Zhou ,
  • Zhengfeng Liu ,
  • Lei Li ,
  • Hu Chen ,
  • Changming Li
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  • Do-Fluoride Chemicals Co.,Ltd.,Jiaozuo 454150,China

Received date: 2020-01-28

  Online published: 2020-07-13

Abstract

A method of purifying salt lake lithium ore and recovering fluorine-containing lithium carbonate was mainly described.The process flow was as follows:the salt lake lithium ore(fluorine-containing lithium carbonate) was washed by water to remove most of the soluble impurities contained in it,and then it was put into the lime milk slurry for heating to 90~95 ℃ according to a certain proportion.Then it was filtered to obtain the lithium hydroxide solution after 4 h of reaction.The lithium hydroxide solution was pressurized and concentrated at 100~120 ℃ for 4 h to obtain lithium hydroxide solution with low content of calcium-and-magnesium ions and silicate.Food grade carbon dioxide was passed into the refined lithium hydroxide solution and the industrial-grade lithium carbonate was obtained,or preparing lithium hydroxide by concentration.The lithium hydroxide obtained by procedures above can be used to obtain high-purity lithium carbonate with silicon content less than 10×10-6 through secondary carbonization,cation exchange resin to remove calcium and magnesium ions and recrystallization.The lithium hydroxide can also be used to obtain lithium hydroxide monohydrate with calcium content less than 5×10-6and magnesium content less than 2×10-6 through concentration.

Cite this article

Xinfang Xu , Xiaoping Zhou , Zhengfeng Liu , Lei Li , Hu Chen , Changming Li . Study on causticization and purification of salt lake lithium ore and recovery of fluorine-containing lithium carbonate[J]. Inorganic Chemicals Industry, 2020 , 52(7) : 62 -65 . DOI: 10.11962/1006-4990.2019-0451

References

[1] 佚名. 从碳酸锂价格走势看新能源政策与需求[J]. 当代化工, 2016,45(4):879.
[2] 孟广寿. 矿石提锂与盐湖提锂卤水提锂将并存发展[J]. 世界有色金属, 2008(2):67-69.
[3] 贾旭宏, 李丽娟, 曾忠明, 等. 盐湖锂资源分离提取方法研究进展[J]. 广州化工, 2010(10):10-13.
[4] 周和平. 上市公司热衷扩能碳酸锂市场承压[J]. 中国石油和化工, 2019(2):7-9.
[5] 张江峰. 我国碳酸锂生产现状及展望[J]. 中国金属通报, 2009(8):28-34.
[6] 朱明道. 氢氧化锂的制备方法[J]. 陕西化工, 1995(3):45.
[7] 刘海霞. 氟化锂生产工艺研究进展[J]. 轻金属, 2011(3):11-13.
[8] 李慧, 梁淑芬, 徐浩, 等. 碳酸锂主含量检测方法对比研究[J].广东化工, 2019(9): 87, 125.
[9] 李翔, 易永, 刘洋. 在线基体消除离子色谱电导法测定碳酸锂中氯、硫酸根[J]. 福建分析测试, 2013(6):25-27.
[10] 张世镖, 高炳亮, 王兆文, 等. 单水氢氧化锂制备氧化锂的研究[J]. 稀有金属, 2015(9):807-811.
[11] 吴新旺. 改进单水氢氧化锂结晶状态的措施[J]. 新疆有色金属, 2009(2):43-44.
[12] 孙军涛, 张智超, 肖付刚, 等. 离子交换树脂对玉米芯低聚木糖脱色脱盐工艺研究[J]. 食品科技, 2017(12):185-190.
[13] 崔文甲, 李晓, 王月明, 等. 腌渍黄瓜脱盐工艺的研究[J]. 食品工业, 2018(3):76-80.
[14] 李兵兵. 离子交换树脂的结构特点及应用[J]. 黑龙江科技信息, 2015(11):127.
[15] 崔诚, 陈悦, 陈季旺, 等. 基于混合床离子交换树脂脱盐的草鱼肽及其理化性质[J]. 食品科学, 2013(18):23-27.
[16] 周小林, 况云所, 杨刚. 离子交换树脂运行中存在的问题及解决对策[J]. 云南化工, 2018,45(5):97-98.
[17] 金博书. 中国离子交换树脂供需分析及前景展望[J]. 中国石油和化工经济分析, 2017(9):62-64.
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