化工矿产地质2025，Vol.47Issue(3)：258-264,7.
贵州某粉煤灰酸性浸出液提锂试验研究
Experimental Study on Lithium Extraction from Acid Leached Fly Ash Leachate in Guizhou
马骏辉 1钟方军 2丁晓姜 1吴林 2刘浩然 1李熹 2姬云波 1王超 1权越胜1
作者信息
- 1. 中化地质矿山总局地质研究院,北京 100013
- 2. 贵州省煤田地质局实验室,贵州 贵阳 550081
- 折叠
摘要
Abstract
As a potential secondary lithium resource carrier,fly ash exhibits complex multiphase mineral structures—primarily containing aluminosilicate glass phase and mullite crystalline phase—that lead to critical challenges in acid leaching for lithium extraction,including low Li+concentration and complex coexisting ion systems in leachate,which in turn leads to difficulties in selective separation.This study systematically evaluates the impurity removal and lithium recovery efficiencies of the precipitation method,the adsorption method,and the membrane separation method based on the characteristics of fly ash leachate from Guizhou Province,and develops a membrane-precipitation coupled process.The experimental results show that the precipitation method has high reagent consumption and low lithium recovery rate;the adsorption method is not applicable due to the low adsorption capacity and poor selectivity of resins and aluminum-based materials in acidic media;the membrane method has low requirements for Li+concentration,and exhibits excellent ion sieving performance,and is more suitable for application;the combined impurity removal and lithium extraction process using the membrane-precipitation method can significantly improve the lithium recovery rate,and finally achieve a lithium carbonate grade of 99.89%with a recovery rate increased to 57.07%,providing a research basis for the industrialization of lithium extraction from fly ash.关键词
粉煤灰/酸性浸出/离子除杂/提锂Key words
Fly ash/Acid leaching/Ion impurity removal/Lithium extraction分类
矿业与冶金引用本文复制引用
马骏辉,钟方军,丁晓姜,吴林,刘浩然,李熹,姬云波,王超,权越胜..贵州某粉煤灰酸性浸出液提锂试验研究[J].化工矿产地质,2025,47(3):258-264,7.
