【摘要】 实验研究了钾长石－石膏－碳酸钙体系加入硫酸钠时的热分解反应动力学，结果表明，改变反应温度、硫酸钠浓度和钾长石粒径，热分解过程均受克－金－布固膜扩散控制。反应过程对硫酸钠的反应级数为0．545，反应速率与钾长石初始粒径的平方成反比，表现活化能为164．5kJ·mol－1，并用扫描电镜和X－ray衍射分析对产物进行物相分析，结合热分析和热力学分析结果，初步分析了该体系热分解过程的反应机理，拟定了反应步骤。更多还原

【Abstract】 The effects of reaction temperatures, additive Na2SO4 concentrations and particle sizes of microcline on the thermal dissociation rate of the system of microcline: CaSO4·2H2O: CaCO3=1:1:3.36 (mass ratio) are investigated. The results show that the kinetic experimental data fit Crank-Ginstling- Braunshteln’s diffusion－through－product-layer－reaction-control model， the reaction rate is a 0.545 order with respect to additive Na2SO4 concentration, and that the apparent activation energy is 164.5KJ.mol-1. In addition，the dissociation process is analyzed by thermal analysis of TG and DSC，and the roasts are analyzed by X－ray diffraction and scanning electronlc microscopy (SEM). Compbined with thermodynamical analysis，the dissociation mechanism and steps of the microcline system are proposed.更多还原