化工进展2019，Vol.38Issue(3)：1538-1544,7.DOI:10.16085/j.issn.1000-6613.2018-1020
烧结剂对新疆粉煤灰中锂浸出的作用特性
The effect of activator on lithium extraction from Xinjiang fly ash
摘要
Abstract
The extraction of lithium from a typical Xinjiang fly ash was studied in this paper. Five kinds of activators including carbonate, acetate, bicarbonate, chloride and sulfate were mixed with the fly ash for calcination and activation. The effects of calcination temperature, addition percent of activator and leaching agent on lithium extraction were investigated. Moreover, microwave heating was used on lithium extraction in this paper. The comparison between microwave and traditional water bath heating on Li extraction was discussed. The results show that potassium carbonate, sodium carbonate, sodium acetate, or sodium chloride as activator exhibited high abilities for lithium extraction. For most activators with good leaching effect, 800℃ is suitable as the calcination temperature. Hydrochloric acid was better than sulfuric acid as a leaching agent for lithium extraction from coal-ash. It was found that microwave increased lithium extraction by 55％ compared to water bath heating. The mixed activator of Na2 CO3 and K2 CO3 showed better activation performance than either as a single activator. The extraction ratio of Li in ash reached 93％ by using a 30％ Na2 CO3 and 70％ K2 CO3 mixture as the activator.关键词
粉煤灰/锂/烧结剂/微波/固废回收Key words
coal-fired ash/lithium/activator/microwave/solid waste recycling分类
资源环境引用本文复制引用
董卉,陈娟,李箫玉,邵莉..烧结剂对新疆粉煤灰中锂浸出的作用特性[J].化工进展,2019,38(3):1538-1544,7.基金项目
国家自然科学基金(51406062,51776112) （51406062,51776112）
国家国际科技合作专项(2015DFA60410) （2015DFA60410）
山东省重点研发计划(2018GGX104019) （2018GGX104019）
山东大学基本科研业务费专项(2016TB001) （2016TB001）
