聚砜作粘结剂的锂离子筛粉体的高性能造粒研究  

Study on high-performance granulation of lithium-ion sieve powder with polysulfone as binder

作　　者：王珞聪 李天玉 彭文娟 陈亦力 莫恒亮 Wang Luocong;Li Tianyu;Peng Wenjuan;Chen Yili;Mo Hengliang(Beijing Hua Te Yuan Technology Co.,Ltd.,Beijing 100089;Beijing Origin Water Membrane Technology Co.,Ltd.,Beijing 101400)

机构地区：[1]北京华特源科技有限公司,北京100089 [2]北京碧水源膜科技有限公司,北京101400

出　　处：《化工新型材料》2025年第1期84-88,共5页New Chemical Materials

基　　金：国家重点研发计划(2022YFC3203000)。

摘　　要：用于盐湖提锂的钛系锂离子筛(β-H_(2)TiO_(3))粉体的尺寸属于微纳米级别,需要对其进行颗粒化成型才能填柱使用。针对β-H_(2)TiO_(3)的实际应用工况(碱性环境提锂,酸性环境脱锂),采用可耐酸碱的聚砜(PSF)作为粘结剂对β-H_(2)TiO_(3)粉体进行滴粒成型。通过探究PSF用量、N,N-二甲基乙酰胺(DMAC)用量、聚乙烯吡咯烷酮(PVP-K15)用量、凝胶浴温度及滴粒针孔直径对β-H_(2)TiO_(3)-PSF颗粒性能的影响,确定滴粒成型的配方及工艺。获得的β-H_(2)TiO_(3)-PSF颗粒对Li^(+)的体积吸附容量为4.70g/L,堆积密度为0.455kg/L,且该材料在循环100次后,体积吸附容量仍为原来的95%。The size of the titanium-based lithium-ion sieve(β-H_(2)TiO_(3))powder used for lithium extraction from salt lakes belongs to the micro-nano level,and it needs to be granulated and shaped in order to be used for column filling.In view of the actual application conditions ofβ-H_(2)TiO_(3)(lithium extraction in alkaline environment and lithium elution in acidic environment),this paper adopted acid-alkali resistant polysulfone(PSF)as the binder for droplet formation ofβ-H_(2)TiO_(3)powder.By investigating the effects of PSF dosage,N,N-dimethylacetamide(DMAC)dosage,polyvinylpyrrolidone(PVP-K15)dosage,gel bath temperature and drop pinhole diameter on the properties ofβ-H_(2)TiO_(3)-PSF particles,the formula and process of drop pellet molding were determined.The volume adsorption capacity of the obtainedβ-H_(2)TiO_(3)-PSF particles for Li+was 4.70g/L,the bulk density was 0.455kg/L,and the volume adsorption capacity of the material still remained at 95%of the original value after 100 cycles.

关 键 词：钛系锂离子筛 造粒 粘结剂 致孔剂 盐湖提锂 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]