钾长石分解反应热力学与过程评价

综述了添加各种助剂分解钾长石的研究进展。对不同体系中钾长石分解反应的G ibbs自由能和能耗计算,综合考虑一次性资源、能源消耗量和烧结过程的环境相容性、产品方案等因素,结果表明:只有以石灰石、碳酸钠为配料的工艺路线具有实际工业应用价值;而唯有以碳酸钠为配料时,钾长石原料烧结过程才具有一次性资源消耗量最少、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钾长石的技术路线,具有良好的工业化应用前景。

Potassium Feldspar and Evaluation of the Processes

The advances of thermal decomposition of potassium feldspar with various additive agents are reviewed.Thermodynamic calculations of the thermal decomposition reactions of potassium feldspar are performed for both of the Gibbs free energy changes and energy consumptions during the sintering processes with various additives.Taking such factors into consideration as mineral resource consumption,energy consumption,environmental compatibility,and the terminal product schema for the sintering procedures of potassium feldspar powdery materials,it is deduced that both procedures with limestone and sodium carbonate as additives are of signi-ficance in industry;and further,it is only when sodium carbonate is taken as additive 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.It is therefore feasible that the procedure suggested in this paper is hopeful industrialized both in economic benefits and environmental kindness.