摘要
粉末状离子筛吸附剂流动性和渗透性较差,循环吸附时损失率高,不能直接用于盐湖提锂,为了使其满足工业化连续提锂的要求,需对它进行成型加工。综述了现有成型工艺方法,包括造粒、成膜、发泡、成纳米纤维、磁化和复合载体法等。造粒成型工艺有直接黏结成型法和交联聚合成型法2种方法,聚氯乙烯是较为常用的黏结剂,具有一定的强度和机械稳定性,但还需添加亲水性物质以增加其对含锂溶液的吸附性能。成膜、发泡、成纳米纤维、磁化和复合载体法也都在离子筛成型工艺上有良好的发展前景。最后进行了各种成型方式优缺点的总结,并展望了成型工艺未来的发展趋势。
The fluidity and permeability of the powder ion sieve adsorbent are poor,and the loss rate is high during cyclic adsorption,so it cannot be directly used for lithium extraction from salt lakes.In order to meet the requirements of industrial continuous lithium extraction,it needs to be formed and processed.In this paper,the existing forming methods were reviewed,such as granulation,membrane forming,foaming,nanofiber forming,magnetization and composite carrier method.There are two methods of granulation molding process:Direct bonding forming method and crosslinking polymerization forming method.Polyvinyl chloride is a more commonly used binder,which has certain strength and mechanical stability,but it is also necessary to add hydrophilic substances to increase its adsorption performance of lithium containing solution.The methods of membrane forming,foaming,nanofiber forming,magnetization and composite carrier also have good development prospects in the ion sieve forming process.Finally,the advantages and disadvantages of various forming methods were summarized,and the future development trend of forming process was prospected.
作者
周冰冰
蔡修贤
李勇
樊瑞
刘肖
李凤华
ZHOU Bingbing;CAI Xiuxian;LI Yong;FAN Rui;LIU Xiao;LI Fenghua(School of Metallurgy,Northeastern University,Shengyang Liaoning 110819,China)
出处
《当代化工》
CAS
2024年第11期2698-2705,共8页
Contemporary Chemical Industry
基金
国家自然科学基金项目(项目编号:52074082)。
关键词
锂离子筛
成型
盐湖提锂
Lithium ion sieve
Forming
Lithium extraction from salt lake
