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研究了钾长石矿热分解过程的反应行为和动力学．对６种钾长石体系进行了热力学分析，计算了各反应在８００～１６００Ｋ的ΔＧ０Ｔ，并以此指导实验．研究了焙烧温度、停留时间和助剂配比对钾长石体系热分解为水溶性钾的影响，得出最佳操作条件．添加０．９％添加剂Ｉ能使适宜焙烧温度由１３２３Ｋ降至１２２３Ｋ，钾分解率可达８４％．不加与加入添加剂Ｉ的２种钾长石体系热分解过程皆符合克－金－布动力学方程，均受固膜扩散控制，表观活化能分别为１８４．８４ｋＪ／ｍｏｌ和１５８．９ｋＪ／ｍｏｌ，并给出相应的动力学方程．
The reaction behavior and kinetics of potassium feldspar thermal decomposition process were studied. Thermodynamic analysis of six kinds of K-feldspar systems was carried out. The ΔG0T of each reaction was calculated at 800 ~ 1600K, and the experiments were conducted. The effects of calcination temperature, residence time and auxiliary ratio on the thermal decomposition of potassium feldspar into water-soluble potassium were studied. The optimum operating conditions were obtained. Add 0.9% Additive I can make the appropriate roasting temperature from 1323K to 1223K, potassium decomposition rate of up to 84%. The thermal decomposition processes of two kinds of K-feldspar without addition of additive I all conform to the kinetic equation of g-gold-cloth and are controlled by solid-film diffusion with apparent activation energies of 184.84 kJ / mol and 158.9 kJ / mol, and give the corresponding kinetic equation.