ρ-Al2O3在莫来石隔热耐火砖中的应用研究  

Application of ρ-Al2O3 in insulating mullite refractory bricks

作　　者：殷波 李远兵[1] 廖佳 范昌龙 毛旭敏 宋晓春 Yin Bo;Li Yuanbing;Liao Jia;Fan Changlong;Mao Xumin;Song Xiaochun(Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学,湖北武汉430081 [2]宜兴摩根热陶瓷有限公司,江苏无锡214222

出　　处：《耐火材料》2020年第6期529-532,共4页Refractories

摘　　要：为了研究ρ-Al2O3对莫来石质隔热耐火砖的制备工艺及高温性能的影响,以煅烧莫来石细粉、黏土、煅烧氧化铝为主要原料,ρ-Al2O3为结合剂,十二烷基磺酸钠为发泡剂,制备了莫来石隔热耐火砖,研究了ρ-Al2O3添加量(加入质量分数分别为0、3%、5%、8%、10%、15%和20%)对泥浆的凝结时间、脱模时间以及烧后莫来石质隔热耐火砖性能的影响。结果表明,ρ-Al2O3可促进莫来石隔热耐火砖的凝结与脱模;但ρ-Al2O3添加量(w)超过10%时,莫来石隔热耐火砖的高温性能显著降低。综合来看,ρ-Al2O3的添加量为8%(w)较为合适。To study the effect ofρ-Al2O3 on their preparation process and hot properties,insulating mullite refractory bricks were prepared using calcined mullite fine powder,clay,calcined alumina as the main starting materials,ρ-Al2O3 as the binder,and sodium dodecyl sulfonate as the foaming agent.The effect of theρ-Al2O3 addition(0,3,5,8,10,15,and 20%,by mass)on the setting time of slurries and the demolding time as well as the properties of insulating mullite refractory bricks after burning was researched.The results show thatρ-Al2O3 can promote setting and demolding,but when theρ-Al2O3 addition exceeds 10%,the hot properties of the bricks are significantly reduced;generally,8%ofρ-Al2O3 is appropriate.

关 键 词：Ρ-AL2O3 莫来石隔热耐火砖 制备工艺 高温性能 

分 类 号：TQ175[化学工程—硅酸盐工业]