中南大学学报（自然科学版）2025，Vol.56Issue(8)：3089-3103,15.DOI:10.11817/j.issn.1672-7207.2025.08.001
粉煤灰资源化:氧化铝回收研究进展
Resource utilization of coal fly ash:research progress on alumina recovery
摘要
Abstract
Coal fly ash is an industrial solid waste generated by coal-fired power plants.Most coal fly ash is directly subjected to simple stockpiling without proper treatment,leading to the ineffective utilization of valuable elements,especially aluminum.Coal fly ash has certain polluting properties and can cause severe impacts on the atmosphere,soil,groundwater environment,and so on.Coal fly ash from most producing areas in China is rich in aluminum resources(the mass fraction of alumina in some high-alumina fly ash exceeds 50％).Due to its chemical composition similar to that of bauxite,and particularly against the backdrop of the current intricate international situation,high-alumina fly ash is regarded as a substitute for bauxite,which holds significant strategic importance for the sustainable production of the alumina industry.In the paper,the research progress was reviewed in recovering alumina from coal fly ash by means of processes such as pyrometallurgical activation,hydrometallurgical treatment,sub-molten salt method,and carbon-chlorination method.The existing problems in the resource utilization of coal fly ash were analyzed.Finally,the future technologies for alumina recovery from coal fly ash,which can provide a reference for the resource utilization of coal fly ash were prospected.关键词
粉煤灰/资源化利用/氧化铝/烧结/酸浸Key words
coal fly ash/resource utilization/alumina/sintering/acid leaching分类
矿业与冶金引用本文复制引用
刘思遥,陈星宇,李江涛,刘旭恒,赵中伟..粉煤灰资源化:氧化铝回收研究进展[J].中南大学学报（自然科学版）,2025,56(8):3089-3103,15.基金项目
国家自然科学基金资助项目(52174339)(Project(52174339)supported by the National Natural Science Foundation of China) （52174339）
