Effect of CaO/SiO_(2) Slag Mass Ratio on Dissolution Rate of Alumina-based Refractory Ceramics  

作　　者：ZENG Fanbo HUANG Ao WANG Xinlian LI Shenghao ZHANG Shuzhe QU Pengcheng GU Huazhi 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

出　　处：《China's Refractories》2023年第1期30-34,共5页中国耐火材料（英文版）

基　　金：supported by the National Natural Science Foundation of China(52272022);the Special Project of Central Government for Local Science and Technology Development of Hubei Province(2019ZYYD076);the Innovation and Entrepreneurship Fund of Wuhan University of Science and Technology(D202202171045002669).

摘　　要：The dissolution of alumina-based refractory ceramics in CaO-Al2O3-SiO_(2)slag melts was performed based on the in-situ observation system of an ultra-high-temperature laser confocal microscope,and the effect of the CaO/SiO_(2)slag mass ratio(C/S ratio)on the dissolution rate of alumina-based refractory ceramics was investigated.The results indicate that the dissolution rate increases with an increase of the C/S ratio and is mainly controlled by diffusion.During the early stage of dissolution,for all C/S ratios,the dissolution process conforms to the classical invariant interface approximation model.During the later stage of dissolution,when the C/S ratio is≥6,the dissolution process is significantly different from the model above because of the formation of a thick interfacial layer,which can be explained by dissolution kinetics.

关 键 词：alumina-based refractory ceramics CaO/SiO2 mass ratio dissolution rate diffusion control in-situ observation 

分 类 号：TQ175.7[化学工程—硅酸盐工业]