文献类型：期刊文献

英文题名：Preparation of Battery-Grade Lithium Carbonate with Lithium-Containing Desorption Solution

作者：Xu, Zheng-Guo[1];Sun, Shu-Ying[1,2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Joint Int Lab Potassium & Lithium Strateg Resourc, Shanghai 200237, Peoples R China

年份：2021

卷号：11

期号：9

外文期刊名：METALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000700178600001)】；

基金：This research was funded by the National Key R&D Program of China (2017YFB0603104), and Sponsored by Shanghai Pujiang Program (2019PJD011).

语种：英文

外文关键词：lithium carbonate; carbonation; decomposition; battery-grade; air stream pulverization

摘要：In this study, a process for preparing battery-grade lithium carbonate with lithium-rich solution obtained from the low lithium leaching solution of fly ash by adsorption method was proposed. A carbonization-decomposition process was carried out to remove impurities such as iron and aluminum. First, primary Li2CO3 was treated by CO2 to get the more soluble bicarbonates. The decomposition of LiHCO3 produced insoluble Li2CO3 at 90 degrees C And Li2CO3 was smashed by air stream pulverization. The final precipitation yielded a high purity (99.6%) and homogeneous Li2CO3. Some factors affecting production efficiency were investigated. The results showed that a liquid-solid ratio of 25:1, a carbonization temperature of 25 degrees C, an air velocity of 2 L/min, and a stirring speed of 400 rpm; a decomposition temperature of 90 degrees C and a stirring speed of 400 rpm, a molar ratio of EDTA to Ca 2:1; an air pressure of 0.3 MPa and hot water washing precipitate (L/S mass ratio 2:1) promoted ions removal.