Effect of Submicron SiO_(2) Powder Addition on Properties of Cement Free Iron Trough Castables  

作　　者：CHENG Shuiming CHEN Jinfeng WEI Jianxiu CAI Wei ZHAO Huizhong 

机构地区：[1]Wuhan Research Institute of Metallurgy Construction Co.,Ltd.of MCC Group,Wuhan 430081,China [2]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

出　　处：《China's Refractories》2022年第3期9-13,共5页中国耐火材料（英文版）

基　　金：support from the National Natural Science Foundation of China(NSFC,No.51804233)。

摘　　要：A new cement free iron trough castable was prepared with dense corundum and silicon carbide as the main raw materials and submicron SiO_(2) powder(d_(50)=0.242μm,SiO_(2)=99.9 mass%)as the binder.The effect of the submicron SiO_(2) powder addition(3%,4%,5%,6%,7%,8%,and 9%,by mass,respectively)on the properties of the prepared castables was studied.The working mechanism of submicron SiO_(2) powder was analyzed from the perspective of the particle size distribution and infrared absorption spectrum.The results show that:(1)cement free iron trough castables can be prepared using submicron SiO_(2) powder alone as the binder;(2)compared with traditional castables,the cement free castables have made a breakthrough in the water addition and hot modulus of rupture.The optimal submicron SiO_(2) powder addition is 4%-6%.

关 键 词：iron trough castable cement free submicron SiO_(2)powder microstructure 

分 类 号：TQ175.732[化学工程—硅酸盐工业]