炼焦煤热解结焦过程的热扩散率特征  

Characteristics of effective thermal diffusivity for coking coal during carbonization

作　　者：孙维周 崔平[3] 郑明东[3,4] 严大炜 SUN Weizhou;CUI Ping;ZHENG Mingdong;YAN Dawei(School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China;Central Research Institute of BAOWU,Shanghai 200126,China;School of Chemical Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China;.Wanjiang University of Technology,Ma'anshan 243031,Anhui,China;School of Energy and Environment,Anhui University of Technology,Ma'anshan 243002,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002 [2]中国宝武集团中央研究院,上海200126 [3]安徽工业大学化学与化工学院,安徽马鞍山243002 [4]皖江工学院,安徽马鞍山243031 [5]安徽工业大学能源与环境学院,安徽马鞍山243002

出　　处：《钢铁研究学报》2023年第5期541-550,共10页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(22278001)。

摘　　要：煤的热解结焦过程包含了复杂的物理与化学变化过程,对该过程的研究是探索不同炼焦煤结焦机制以及煤质评价与表征方法的必要途径。通过测量炼焦煤结焦过程中固定区间的温度变化,计算了16种炼焦煤在结焦过程中的有效热扩散率曲线,并对不同结焦阶段的曲线特征进行分析。结果表明,不同种类炼焦煤有效热扩散率曲线的区别主要表现在热塑阶段的“V”特征,以及半焦阶段的热扩散率范围。有效热扩散率曲线热塑阶段的“V”特征与传统的煤热塑性指标具有良好的相关性;半焦阶段有效热扩散率均值(TDMS)主要受该阶段焦炭的多孔体结构致密性(SDI)以及光学组织指数(OTI)的综合影响,SDI越高,OTI越高,则TDMS越低。The carbonization process of coking coal contains a lot of complex physical and chemical transformations,so the study of this process is a fundamental way to explore the coking mechanism and evaluation method for coking coal.The effective thermal diffusivity curves of 16 coking coals during coking were calculated by measuring the temperature changes in a fixed range during coking,and the characteristics of the curves at different coking stages were analyzed.The results show that the difference of thermal diffusivity curves for different coal mainly exists in"V"feature for thermoplastic stage and the range of curve for semi-coke stage.The"V"feature of curve in the thermoplastic stage has a good corelation with the thermoplastic property of coal.The thermal diffusivity mean in the semi-coke stage(TDMS)is mainly affected by the structure density index(SDI)and the optical texture index(OTI)of the coke at this stage.The higher the SDI and OTI,the lower the TDMS.

关 键 词：炼焦煤 结焦过程 有效热扩散率 煤热塑性 焦炭显微结构 

分 类 号：TF053[冶金工程—冶金物理化学]