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

王珞聪 ¹李天玉 ¹彭文娟 ¹陈亦力 ²莫恒亮¹

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作者信息

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
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摘要

用于盐湖提锂的钛系锂离子筛(β-H2TiO3)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-H2TiO3的实际应用工况(碱性环境提锂,酸性环境脱锂),采用可耐酸碱的聚砚(PSF)作为粘结剂对β-H2TiO3粉体进行滴粒成型.通过探究PSF用量、N,N-二甲基乙酰胺(DM AC)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-H2TiO3-PSF颗粒性能的影响,确定滴粒成型的配方及工艺.获得的β-H2TiO3-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％.

Abstract

The size of the titanium-based lithium-ion sieve(β-H2TiO3)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 of β-H2TiO3(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 of β-H2TiO3 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 of β-H2TiO3-PSF particles,the formula and process of drop pellet molding were determined.The volume adsorption capacity of the obtained β-H2TiO3-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

Key words

titanium-based lithium-ion sieve/granulation/binder/porogen/lithium extraction from salt lake

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出版年

2025

化工新型材料

中国化工信息中心

化工新型材料

北大核心

影响因子：0.357

ISSN：1006-3536

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