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针对单一计算几个活化能无法准确揭示还原过程全貌的问题,采用非等温热分析方法对粉煤直接熔融还原高磷铁矿的过程规律进行了研究,利用多重扫描法结合Starink方法对还原过程的动力学参数(表观活化能,频率因子)进行了改进计算,提出一种表观活化能的分布函数及频率因子的分布动力学模型及方法;该模型分别从活化分子和碰撞理论角度有效地揭示出高磷铁矿直接熔融还原过程的能量转化机理及阶段特征,为云南省高磷铁矿的进一步开发提供参考以及其他矿产资源的开发在理论研究上提供方法借鉴。
Aiming at the problem that several activation energies can not reveal the full picture of the reduction process accurately, the non-isothermal analysis method was used to study the process of direct reduction and reduction of high-phosphorus iron ore by pulverized coal. The multi-scanning method combined with Starink method was applied to the reduction process (Apparent activation energy, frequency factor) are calculated and improved, and a distribution dynamic function and frequency distribution dynamic model and method of apparent activation energy are proposed. The model is validated from the viewpoint of activation molecule and collision theory Reveals the energy conversion mechanism and stage characteristics of high-phosphorus iron ore in the process of direct smelting and reduction, provides references for the further development of high-phosphorus iron ore in Yunnan Province and provides references for the development of other mineral resources in theory.