微膨胀莫来石结合氧化铝空心球砖的研制  

Development of micro-expanded mullite-bonded alumina hollow sphere brick

作　　者：李纯明 李永军 刘爱平 吴吉玉 Li Chunming;Li Yongjun;Liu Aiping;Wu Jiyu(Wangnai Branch of Shandong Refractory Co,Ltd.,Zibo 255311,China)

机构地区：[1]山东耐火材料集团有限公司王耐分公司,淄博255311

出　　处：《耐火与石灰》2020年第4期28-30,共3页Refractories & Lime

摘　　要：以0.2~3 mm的氧化铝空心球和≤0.044 mm电熔白刚玉细粉为主要原料,在细粉中引入不同硅源,经过隧道窑1 460℃烧成,在制品基质中形成莫来石,利用莫来石化反应产生的膨胀研制出微膨胀莫来石结合氧化铝空心球砖,解决制品长期在高温环境下的收缩问题,提高制品的高温使用性能。试验结果表明,通过引入15%硅源C,经1 460℃下烧成35 h后,制品的显气孔率为57. 7%;体积密度为1. 49 g/cm^3;0. 1 MPa荷重软化温度T0. 6>1 700℃;1 600℃烧成2 h后重烧线变化为+0. 14%。Micro-expanded mullite-bonded alumina hollow sphere bricks are prepared at 1460℃in tunnel kiln,with 0.2~3 mm alumina bubbles and≤0.044 mm fused white corundum powder as main raw materials and adding different silicon sources into the powders.Mullite forms in the substrate of the brick,and the reaction expansion solves the products shrinkage problem in hightemperature environment for a long time and improves the high-temperature performance of the products.The experimental results show that by adding 15%silicon source C and after being heated at 1460℃for 35 h,the apparent porosity of the products is 57.7%,the bulk density is1.49 g/cm3,the refractoriness under load at 0.1 MPa is T0.6>1700℃,and the permanent change in dimension on heating is+0.14%at 1600℃for 2 h.

关 键 词：氧化铝空心球砖 莫来石化 微膨胀 

分 类 号：TQ175.12[化学工程—硅酸盐工业]