云南化工2025，Vol.52Issue(7)：36-40,5.DOI:10.3969/j.issn.1004-275X.2025.07.08
粉煤灰碱溶SiO2的速率与机理研究
Study on the Rate and Mechanism of Alkali Dissolution of Fly Ash
摘要
Abstract
The rate and reaction mechanism of alkali leaching process of fly ash from a large thermal power plant in Liupanshui were deeply ex-plored.Through experiments,the effects of fly ash particle size,heating time,concentration of NaOH solution,liquid-solid ratio,and reaction temperature on silicon leaching rate were investigated.The results showed that the highest silicon leaching rate could reach 52%when the fly ash particle size was 160 mesh,heated for 4 hours,the alkali concentration was 240 g/L,the liquid-solid ratio was 6∶1,and the reaction temperature was 80℃.Through kinetic calculations of the alkali soluble silicon process in fly ash,the average apparent activation energy of the alkali soluble silicon leaching reaction was obtained to be 36.08 kJ/mol.The leaching rate of the silicon leaching process is controlled by a mixture of diffusion and interfacial chemical reactions.关键词
粉煤灰/二氧化硅/反应机理/溶出率Key words
Fly Ash/Silicon Dioxide/Reaction Mechanism/Dissolution Rate分类
化学化工引用本文复制引用
肖开旭,文珲,任成微,田蕊,田小松,罗镓杰,陈慧琳,宋说讲..粉煤灰碱溶SiO2的速率与机理研究[J].云南化工,2025,52(7):36-40,5.基金项目
大学生创新创业训练计划项目(S202310977046),大学生创新创业训练计划项目(S202310977114),六盘水师范学院重点学科建设项目:冶金工程(LPSSYZDXK202001),州省高等学校煤炭产业碳中和工程研究中心(黔教技[2023]044号). （S202310977046）
