Relation Between Sintering Reactivity of Matrix and Thermal Shock Resistance of Ultra-low Cement Bonded Corundum-spinel Castables for Fired Purging Plugs

作     者：ZHANG Ju LONG Bin ZHOU Yunpeng Andreas BUHR WANG Feng CUI Qingyang XIE Guofeng DING Dafei JIA Quanli YE Guotian 

作者机构：Henan Key Laboratory of High Temperature Functional CeramicsSchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Qingdao Almatis Co.Ltd.Qingdao 266510China Almatis GmbHFrankfurt 60528Germany Luoyang LIRR Refractories Co.Ltd.Luoyang 471000China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2018年第27卷第4期

页      面：13-20页

学科分类：0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(51572244 and U1604252)for supporting this work 

主　　题：reactive alumina corundum-spinel castable sintering reactivity thermal shock resistance 

摘      要：Purging plugs installed in the bottom of steel ladles are widely used for the secondary refining of high quality steel *** dynamic service conditions and temperature gradients caused by the cold inert gas blown through the plug during stirring create a strong thermal shock impact on the *** can affect its service life and restrict the safety and efficiency of steel making if the plug fails during *** this work,the influence of the particle size distribution (PSD) and amount of reactive alumina on the sintering behavior of ultra-low cement bonded corundum-spinel based castables was investigated on lab *** relationship between sintering reactivity of matrix and thermal shock resistance of castables was evaluated in *** show that the sintering of castables can be intensified by using finer reactive ***,excessive sintering of the castable through finer reactive alumina is negative for thermal shock *** microstructure characterization reveals that castables with more intense sintering show denser matrix structure,which is less effective in hampering crack propagation and therefore results in decline of their thermal shock resistance.