高铝粉煤灰烧结反应热力学分析与实验

Thermodynamic Analysis and Experiments on Sintering Reactions of High Alumina Flyash

分别以碳酸钙和碳酸钠为助剂,对高铝粉煤灰在烧结过程中可能发生的化学反应进行研究。基于热力学计算结果,对比了两种工艺的能耗、物耗、温室气体排放量等因素,结合粉煤灰-碳酸钠烧结反应实验,证明以碳酸钠为配料,高铝粉煤灰烧结过程具有一次性资源消耗量少,能耗最低,温室气体CO2排放量最小,且可生产高附加值产品,实现完全清洁生产等优点。因此,选择以碳酸钠为配料分解高铝粉煤灰中的莫来石和铝硅酸盐玻璃相技术路线,具有良好的工业化应用前景。

The possible reactions of high alumina flyash with sodium carbonate and calcium carbonate as flux agent were studied during the sintering processes. Aecording to the results of thermodynamic calculations and the flyash-sodium carbonate sintering experiments, contrasting the energy consumption, material resource consumption and the expellant of the greenhouse gas CO2 during the two sintering processes, it demonstrates that the procedure could be the least consumptions of the mineral resources and energy, the least expellant of the greenhouse gas CO2, and that the terminal products with high value could be manufactured when sodium carbonate is taken as the flux agent. It is therefore feasible that the procedure suggested in this paper is hopeful industrialized both in economic benefits and environmental kindness.