化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (1) : 84-88. DOI: 10.19817/j.cnki.issn1006-3536.2025.01.030

新材料与新技术

聚砜作粘结剂的锂离子筛粉体的高性能造粒研究

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

Wang Luocong¹, Li Tianyu¹, Peng Wenjuan¹, Chen Yili², Mo Hengliang¹

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文章历史 +

Received		Published
2023-11-13		2025-01-20
Issue Date	Revised Date
2025-01-17	2023-11-13

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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),采用可耐酸碱的聚砜(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(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-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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聚砜作粘结剂的锂离子筛粉体的高性能造粒研究[J]. 化工新型材料, 2025, 53(1): 84-88 DOI:10.19817/j.cnki.issn1006-3536.2025.01.030

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基金资助

国家重点研发计划(2022YFC3203000)

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