本文导出了热分析实验时菱镁矿非等温分解的动力学模型,针对反应机理函数的形式,得出:在无约束条件的最优化方法—马夸特(Marquardt)法的基础上,用经验参数稍加改进,适用于有约束条件的TG实验数学模型的参数优化,避免了计算溢出,得出了令人满意的结果。 In this paper, the kinetic model of non-isothermal decomposition of magnesite in thermal analysis experiment is deduced. According to the form of reaction mechanism function, we get: Based on the Marquardt method, an optimization method without constraints, The parameter is slightly improved, which is suitable for the parameter optimization of the TG mathematical model with constraints, avoiding the calculation overflow and obtaining satisfactory results.