(江西理工大学 材料与化学工程学院，赣州 341000)
摘 要: 对以KF为助剂焙烧活化粉煤灰的条件进行研究，并对KF活化粉煤灰及其在焙烧产物酸浸过程中的活化机理进行探讨。采用正交实验法，考察粉煤灰与KF的质量比、焙烧时间、焙烧温度对焙烧产物中铝、铁的酸浸性能的影响。结果表明：粉煤灰与KF的质量比、焙烧温度对铝、铁浸出率影响显著，而焙烧时间则影响不大。最佳焙烧活化条件为：焙烧时间1 h、粉煤灰与KF的质量比20׃4、焙烧温度800 ℃，此时焙烧产物中铝、铁浸出率达96.92%。表明以KF为助剂对粉煤灰进行焙烧可以达到很好的活化效果。
关键字: 粉煤灰；氟化钾；正交实验；活化机理
（Faculty of Materials and Chemical Engineering, Jiangxi University of Science and Technology,
Ganzhuo 341000, China）
Abstract:The roasting activation of coal fly ash using KF as assistant was studied, and the action mechanism of KF was discussed in the process of roasting and acid-leaching. The orthogonal experiment was made to investigate the influence of mass ratio of coal fly ash to KF, roasting time, roasting temperature on aluminum and iron acid-leaching performance of the roasted product. The results show that the influence of mass ratio of coal fly ash to KF, the roasting temperature on the aluminum and iron leaching rate is remarkable, but the influence of the roasting time is not remarkable. The best condition of roasting activation is: roasting time 1 h, mass ratio of coal fly ash to KF 20׃4 and roasting temperature 800 ℃. Under this condition, the leaching rate is 96.92%, which shows that KF has good activation effect on roasting of the coal fly ash.
Key words: coal fly ash; potassium fluoride; orthogonal experiment; activation mechanism
