摘要
在盐湖锂所含的众多杂质元素中,只有随原料伴生的Ca、Mg杂质是电池级碳酸锂制备工艺中较难控制的元素,这是由杂质的赋存形态和成键结构所引起的。针对盐湖锂资源中Ca、Mg大多与极性基团相键合,键能高,不易被物理作用解离的问题,综合考虑杂质的赋存形态特点,对碳化工艺进行研究和创新设计,对特定浓度下碳酸锂溶液高效碳化,缩短反应周期同时建立符合离子交换净化工艺的液相平衡体系,进而探索碳化条件对稳态流场中的液体反应速率的增益影响,优化得出一种具有普适性的锂盐提纯湿法冶金工艺技术路线。
Among the many impurity elements contained in salt lake lithium,only the Ca and Mg impurities associated with raw materials are difficult to control factors in the preparation process of battery grade lithium carbonate,which is caused by the occurrence form and bonding structure of impurities.In view of the problem that Ca and Mg in lithium resources in salt lakes are mostly bonded with polar groups with high bond energy and are not easily dissociated by physical action,the carbonization process is studied and innovatively designed with comprehensive consideration of the characteristics of the forms of impurities,so as to carbonize lithium carbonate solution efficiently at specific concentrations,shorten the reaction period,and establish a liquid phase equilibrium system in line with the ion exchange purification process.Then,the influence of carbonization conditions on the gain of liquid reaction rate in steady flow field was explored,and a general hydrometallurgical process route for lithium salt purification was optimized.
作者
黄良标
段海军
刘毅
袁扬
HUANG Liangbiao;DUAN Haijun;LIU Yi;YUAN Yang(Tibet Helium Lithium Industry Co.Ltd.,Golmud 816099,China;Lanzhou Jiaotong University,College of New Energy and Power Engineering,Lanzhou 730050,China;Lanzhou Jinchuan Science and Technology Park Co.Ltd.,Lanzhou 730070,China)
出处
《甘肃冶金》
2023年第4期104-106,111,共4页
Gansu Metallurgy
基金
盐湖锂生产电池级碳酸锂关键技术应用与示范(XZ202001YD0024C)
甘肃省重点研发计划(20YF8GA038)。
关键词
盐湖锂
碳酸锂
碳化反应
湿法冶金
salt lake lithium
lithium carbonate
carbonization reaction
hydrometallurgy
