氧化锡加入量对镁铝尖晶石浇注料性能的影响  

Effect of tin oxide on properties of magnesium aluminate spinel castables

作　　者：员文杰[1] 商恒 朱青友[1] 邓承继[1] 祝洪喜[1] 

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

出　　处：《耐火材料》2015年第5期335-338,共4页Refractories

摘　　要：为了提高镁铝尖晶石浇注料的性能,研究了氧化锡加入量(质量分数分别为5%、7.5%和10%)对基质中分别采用板状刚玉T60和活性氧化铝CL370的镁铝尖晶石浇注料性能和显微结构的影响。结果表明:在镁铝尖晶石浇注料中添加氧化锡,随着氧化锡添加量的增加,采用板状刚玉试样的显气孔率和烧后线变化率减小,常温抗折强度增大;而采用活性氧化铝试样则以氧化锡添加量为7.5%(w)时显气孔率和烧后线变化率最小,常温抗折强度最大。添加氧化锡的镁铝尖晶石浇注料在1 450℃煅烧5 h后均含有Mg2Sn O4、Ca Sn O3和Ca2Sn O4。可见,氧化锡在高温下与镁砂和铝酸钙水泥发生一系列原位反应提高组分之间的结合,并促进浇注料的烧结。Effects of tin oxide additions （5% ,7.5% and 10% by mass） on the properties and microstructure of magnesium aluminate spinel castables adopting tabular corundum T60 or reactive alumina CL370 as the matrix were researched in order to improve the properties of magnesium aluminate spinel castables. The results show that with the tin oxide addition increasing ,the apparent porosity and linear change on heating of castables made from tabular alumina decrease, and the cold modulus of rupture increases;the apparent porosity and linear change on heating of castables made from reactive alumina with 7.5% SnO2 addition is the lowest, and the cold modulus of rupture reaches the maximum value; the main reaction products include Mg2SnO4,CaSnO3 and Ca2SnO4 in castables after calcined at 1 450℃ for 5 h;tin oxide addition can strengthen the bonding between the components of castables by in-situ reactions, and promote the sintering.

关 键 词：氧化锡 镁铝尖晶石 浇注料 炼铜转炉 

分 类 号：TQ175.73[化学工程—硅酸盐工业]