基于介尺度结构思想,根据空位单元的扩散与聚合理论建立起CaCO3煅烧及CaO烧结过程中从分子尺度过渡到颗粒尺度之间的桥梁——介尺度孔隙结构的演化模型.与传统的经验模型相比,基于介尺度结构的速率方程理论将孔隙的演变过程与CO2气体分子释放、空位的扩散以及空位间相互碰撞聚合同时进行考虑,并建立非线性的速率方程对孔隙的演化的物理过程进行数学描述.模型的计算结果与CaCO3煅烧和烧结的实验数据进行对比,结果表明基于介尺度结构的速率方程理论可以准确地预测孔径的分布及其随时间的演变过程.“,”The rate equation is built to describe the pore size distribution development during the limestone calcination based on the mesoscale theory,which focus on the heterogeneous structure between the molecule/atom and the solid particle.This mesoscale rate equation model has combined the pore structure development process with the CO2 releasing force,the surface diffusion of the vacancy monomer and the coalescence of the vacancy aggregates.And this rate equation could be mathematically solved to obtain the pore size distribution with time evolution.The calculation result agrees well with the calcination experiment data,showing that the rate equation could give a good prediction for the pore structure development during limestone calcination.