基于多种动力学模型的焦炭溶损反应机理解析  

Analysis of the coke solution-loss reaction mechanism based on multiple kinetic models

作　　者：周璐 史含放 张诏民 于海静 李佳霖 黄浚宸 汪琦[1] 杨松陶 ZHOU Lu;SHI Hanfang;ZHANG Zhaomin;YU Haijing;LI Jialin;HUANG Junchen;WANG Qi;YANG Songtao(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《煤质技术》2023年第5期9-15,共7页Coal Quality Technology

基　　金：国家自然科学基金青年基金资助项目(52204315);国家自然科学基金面上资助项目(52174319)。

摘　　要：焦炭在高炉内与CO_(2)发生溶损反应而导致其劣化,对焦炭溶损反应机理的动力学解析可为焦炭热性质评价及高炉顺行提供理论依据。在1100~1300℃范围内对2种不同反应性焦炭(Coke 1、Coke 2)进行等温、等溶损率的溶损反应实验,利用3种不同动力学模型(VM模型、GM模型、RPM模型)对其溶损反应机理进行动力学解析,得到2种焦炭在各个温度下的反应速率常数及其发生溶损反应的活化能。根据失重率计算值与实验值的平均偏差对比可知,Coke 1、Coke 2在同一温度下采用3种动力学模型的反应速率常数由高到低的排序为VM模型、GM模型、RPM模型,确定RPM模型为可靠性最高的动力学模型,Coke 1、Coke 2的溶损反应活化能分别为85.91、90.04 kJ/mol,由此为焦炭在高炉内的溶损反应动力学机理研究提供理论基础和支撑。The degradation of coke is caused by the solution-loss reaction between coke and CO_(2)in the blast furnace.The kinetic analysis of the coke solution-loss reaction mechanism can provide a theoretical basis for the evaluation of coke thermal properties and the smooth operation of the blast furnace.The isothermal solution-loss reaction experiments with weight-loss(25%)on two types of coke(Coke 1,Coke 2)with different reactivities in the range of 1100℃to 1300℃were carried out.Three different kinetic models(VM model,GM model,RPM model)were used to analyze the solution-loss reaction mechanism,the reaction rate constants and activation energy for the solution-loss reaction of the two types of coke at various temperatures were obtained.According to the comparison of the weight-loss rate average deviation between the calculated values and the experimental values,it can be concluded that the reaction rate constants of Coke 1 and Coke 2 using three kinetic models at the same temperature are sorted from high to low as VM model,GM model and RPM model.The RPM model is the most reliable kinetic model,and the activation energy of the solution-loss reaction of Coke 1 and Coke 2 is 85.91 kJ/mol and 90.04 kJ/mol,respectively.Therefore,it provides a theoretical basis and support for the study of the coke solution-loss reaction kinetics mechanism in blast furnace.

关 键 词：焦炭 溶损反应 动力学模型 活化能 反应机理 反应速率常数 溶损率 失重率 

分 类 号：TQ520[化学工程—煤化学工程]