亚微米SiO_(2)粉体对无水泥铁沟浇注料性能的影响  

Effect of submicron SiO_(2) powder on properties of cement free iron trough castables

作　　者：程水明[1,2] 赵惠忠[1] 魏建修[2] 陈金凤[2] 蔡玮 Cheng Shuiming;Zhao Huizhong;Wei Jianxiu;Chen Jinfeng;Cai Wei(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]中冶武汉冶金建筑研究院有限公司,湖北武汉430081

出　　处：《耐火材料》2022年第1期1-5,共5页Refractories

基　　金：国家自然科学基金资助项目(51804233)。

摘　　要：以致密刚玉、碳化硅等为主要原料,以w(SiO_(2))=99.9%的亚微米SiO_(2)粉体(d_(50)=0.242μm)为结合剂,制备了一种新型无水泥铁沟浇注料。研究了亚微米SiO_(2)粉体加入量(质量分数分别为3%、4%、5%、6%、7%、8%、9%)对其性能的影响,并从亚微米SiO_(2)粉体的粒度分布、红外光谱等角度,分析探讨了亚微米SiO_(2)粉体的作用机制。结果表明:1)亚微米SiO_(2)粉体可以单独作为铁沟浇注料的结合剂制备出无水泥铁沟浇注料;2)相比传统铁沟浇注料,无水泥铁沟浇注料在加水量、高温抗折强度等方面取得突破性进展,亚微米SiO_(2)粉体的最佳加入量为4%~6%(w)。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,99.9 mass%SiO_(2))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 perspectives 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 the hot modulus of rupture.The optimal submicron SiO_(2) powder addition is 4%-6%.

关 键 词：铁沟浇注料 无水泥 亚微米SiO_(2)粉体 显微结构 

分 类 号：TQ175[化学工程—硅酸盐工业]