【摘要】 以碳酸钠为活化剂，与粉煤灰混合焙烧以促进铝的提取。研究了碳酸钠用量、焙烧温度、焙烧时间对粉煤灰铝浸出率的影响，利用XRD、SEM-EDS分析了活化前后粉煤灰的物相组成和微观形貌变化，并对其活化机理进行了分析。结果表明，最佳活化焙烧条件为：碳酸钠与粉煤灰的质量比为0.6、焙烧温度800℃、焙烧时间2 h，此时粉煤灰中的铝硅酸盐矿物与碳酸钠发生反应，生成酸溶性矿物霞石，提高了铝的可提取性，铝浸出率达90.96%。更多还原

【Abstract】 Sodium carbonate was used as an activator and mixed with fly ash for roasting to promote aluminum extraction. The influence of different sodium carbonate dosages,roasting temperatures,and roasting times on the aluminum leaching rate of fly ash was investigated,the phase composition and microstructure changes of fly ash before and after activation were analyzed using XRD and SEM-EDS,and the activation mechanism was analyzed. The results show that the optimal activation roasting conditions were determined to be a sodium carbonate-to-fly ash mass ratio of 0.6,a roasting temperature of 800 ℃,and a roasting time of 2 hours.Under these conditions,aluminosilicate minerals in fly ash reacted with sodium carbonate to form the acid-soluble mineral nepheline,enhancing aluminum extractability. Aluminum leaching rate reaches 90.96%.更多还原