成果归属机构：

材料科学与工程学院

作者：

Luo, Shaojun ; Zheng, Xiaohong ; Liu, Haichao ; Zhang, Qing ; He, Mingming ; Wang, Yuehai ; He, Xuwen ; Sun, Zhi

单位：

China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China;Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Res, Beijing 100190, Peoples R China;China Univ Geosci Beijing, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmet Minerals & Sol, Natl Lab Mineral Mat, Beijing 100083, Peoples R China;Shanghai Polytech Univ, 2360 Jinhai Rd, Shanghai 201209, Peoples R China

关键词：

LAKE BRINE; KINETICS; BORON

摘要：

Lithium extraction from lithium-bearing clay mineral (LiBC) has received significant attention due to the increasing demand of lithium for the advanced renewable energy industry. However, the low contents of valuable elements and stable physiochemical properties of LiBC result in high energy consumption and low efficiency in extracting lithium from LiBC. This study demonstrates a low-temperature strategy using (NH4)2SO4 as an additive to effectively extract lithium from LiBC. In details, the thermodynamic analysis verifies that Li, Al, and Fe can be converted to sulfates at 250-450 degrees C during thermal treatment, indicating the possibility for extraction of Li under low-temperature conditions. Subsequently, the leaching behavior of lithium under different roasting temperatures and water leaching conditions was investigated. The results show that 83.43 % of Li can be extracted under optimized conditions. The mechanism study was carried out through a number of characterization techniques including 3D microscope, TG-DSC, XRD, FTIR, and SEM. It reveals that formation of liquidus phase of molten salt is the key to achieve low-temperature roasting and transfer and reactions at the interface of molten salt and LiBC can be significantly enhanced that can easily breakdown the interlayer structures. Consequently, it offers distinct advantages, since the roasting temperature can be significantly decreased with minor impurity ions being leached into the solutions. This research therefore provides an efficient and environmentally friendly method for lithium extraction from minerals.

基金：

Strategic Priority Research Program of Chinese Academy of Sciences [XDA0430105]; The 14th Five-year Informatization Plan of Chinese Academy of Sciences, Construction of Scientific Data Center System [WX145XQ07-12]

语种：

英文

DOI：

10.1016/j.seppur.2024.130204

来源：

SEPARATION AND PURIFICATION TECHNOLOGY,2025():.

出版日期：

2025-05-01

提交日期：

2024-11-13

引用参考：

Luo, Shaojun; Zheng, Xiaohong; Liu, Haichao; Zhang, Qing; He, Mingming; Wang, Yuehai; He, Xuwen; Sun, Zhi. A low-temperature process for lithium extraction from lithium-bearing mineral: Conversion behavior and mechanisms[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2025():.