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): 29-33.

• 研究与开发 • 上一篇    下一篇

沉锂反应条件对碳酸锂纯度及杂质影响的研究

尹记帅,孙文亮(),郝如斯,王晓   

  1. 青海大学化工学院,青海西宁 810016
  • 收稿日期:2018-09-22 出版日期:2019-03-10 发布日期:2020-05-09
  • 作者简介:尹记帅(1992— ),男,硕士研究生,主要从事盐湖卤水锂资源综合利用研究。
  • 基金资助:
    青海省科技厅基础研究项目(2017-ZJ-946Q)

Study on the influence of lithium deposition reaction conditions on purity and impurities of lithium carbonate

Yin Jishuai,Sun Wenliang(),Hao Rusi,Wang Xiao   

  1. College of Chemical Engineering,Qinghai University,Xining 810016,China
  • Received:2018-09-22 Published:2019-03-10 Online:2020-05-09

摘要:

以青海盐湖佛照蓝科锂业股份有限公司的富锂卤水为原料,与碳酸钠溶液进行反应,对沉锂过程进行研究。沉锂过程容易产生包晶现象,即生产过程中的氯化钠和碳酸钠微晶包裹在碳酸锂晶体内。通过检测碳酸锂的纯度和钠、镁、氯、硼等杂质含量,以及对碳酸锂的形貌、粒径等进行表征,考察了沉锂过程中反应温度、碳酸钠浓度、加料方式、搅拌转速、碳酸钠加入量等条件对碳酸锂纯度、杂质含量及包晶现象的影响,探究了各反应条件与包晶现象的关系,为生产电池级碳酸锂提供理论基础。

关键词: 碳酸锂, 盐湖卤水, 沉锂, 包晶

Abstract:

Lithium rich brines from Qinghai Salt Lake Fozhao Lanke Lithium Co.,Ltd.were used as raw materials to react with sodium carbonate solution to study the lithium deposition process.The phenomenon of peritectic precipitation was likely to occur during the lithium precipitation process,meant that sodium chloride and sodium carbonate crystallites encapsulated in lithium carbonate crystals during the production process.The purity of lithium carbonate products,and the contents of impurities,such as sodium,magnesium,chlorine and boron,were detected.The morphology and particle size of products were characterized.The influences of reaction temperature,the concentration of sodium carbonate,the feeding method,the stirring rate,and the amount of sodium carbonate on the purity and impurities of lithium carbonate and on the peritectic phenomena were investigated.The relationship between the reaction conditions and the peritectic phenomenon was explored,providing a theoretical basis for the production of battery grade lithium carbonate.

Key words: lithium carbonate, salt-lake brine, lithium deposition, peritectic

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