陶瓷超滤膜用于盐湖卤水提锂合格液的中试研究

doi:10.11962/1006-4990.2019-0295

Abstract

Abstract:

To solve the problem of flux depression,membrane fouling and separation efficiency decline of nanofiltration mem-brane after long term operation in the separation of Mg ²⁺/Li ⁺ from salt lake brine,the pilot-scale study using ceramic ultrafil-tration membrane as a nanofiltration pretreatment measure for qualified lithium extraction solution from salt lake brine was conducted.The pilot facility was set in the lithium extraction workshop and the qualified solution from lithium extraction pro-cess was used as influent.The results showed that,the ceramic ultrafiltration membrane continuously and stably ran under the flux of 300 L/（m ²·h） both under the normal water quality conditions of influent turbidity below 50 NTU at low temperature in winter and under the condition of extreme influent turbidity of qualified liquid rising to 50~170 NTU,the filtration time was in the range of 30~50 min/cycle.The permeate turbidity was stably below 0.1 NTU,which was better than the influent quality re-quirement of subsequent nanofiltration.

Key words: salt lake brine, qualified lithium extraction solution, ceramic ultrafiltration membrane, pilot

CLC Number:

TQ028.8

Li Xinwang,Gu Xiaojuan,Zuo Dahai,Yang Shuxiong,Peng Kangming. Pilot study of ceramic ultrafiltration membrane for qualified lithium-extraction solution from salt lake brine[J]. Inorganic Chemicals Industry, 2020, 52(4): 61-64.

Figures/Tables 8

References 9

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温度/ ℃	pH	悬浮物SS/（mg·L^-1）	COD（Cr）/ （mg·L^-1）	ρ（Li⁺）/ （mg·L^-1）	ρ（Mg²⁺）/ （mg·L^-1）
12~25	7.54	<100	<30	441	2480
ρ（Ca²⁺）/ （mg·L^-1）	ρ（Na⁺）/ （mg·L^-1）	ρ（HCO₃^-）/ （mg·L^-1）	ρ（Cl^-）/ （mg·L^-1）	ρ（B）/ （mg·L^-1）
28	160	44	7210	49

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Inorganic Acid-Base-Salt Committee of CIESC

Pilot study of ceramic ultrafiltration membrane for qualified lithium-extraction solution from salt lake brine

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