水泥窑用低导热单晶相莫来石砖的研制  

Low thermal conductivity single crystal phase mullite brick for cement kiln

作　　者：马淑龙 苏玉柱 张康康 孟令汉 高长贺 Ma Shulong;Su Yuzhu;Zhang Kangkang;Meng Linghan;Gao Changhe(Beijing Jinyu Tongda Refractory Technologies Co.,Ltd.,Beijing 100085,China)

机构地区：[1]北京金隅通达耐火技术有限公司,北京100085

出　　处：《耐火与石灰》2023年第1期1-3,共3页Refractories & Lime

摘　　要：以单晶相莫来石为主要原料制备单晶相莫来石砖。通过对单晶相莫来石理化指标、物相组成及微观结构分析,发现单晶相莫来石结构致密,稳定性高。对单晶相莫来石砖的理化性能、抗碱侵蚀性能进行检测,其结果与抗剥落高铝砖和硅莫砖进行对比分析,发现单晶相莫来石砖具有气孔率低、体积密度低、荷重软化温度高、热震稳定性高、抗碱侵蚀性能优良等特点。单晶相莫来石砖1 000℃导热系数仅为抗剥落高铝砖的68%和硅莫砖的52%,可替代高铝砖和硅莫砖用于水泥窑预热带、安全带及三次风管等中低温区域。The single crystal phase mullite bricks were made by single crystal phase mullite as raw materials. By analyzing the physical and chemical indexes,phase composition and microstructure of single crystal mullite,it was found that single crystal mullite has dense structure and high stability.The physical and chemical properties and alkali corrosion resistance of single crystal mullite brick were tested,and the results were compared with those of anti-spalling high alumina brick and silicon mullite brick. It was found that single crystal mullite brick has the characteristics of low porosity,low bulk density,high refractoriness under load,high thermal shock resistance and excellent alkali corrosion resistance. The thermal conductivity of single crystal mullite brick at 1 000 ℃ is only 68% of that of anti-spalling high alumina brick and 52% of that of silicon mullite brick. It can replace high alumina brick and silicon mullite brick and be used in the medium and low temperature areas such as the preheating zone of cement kiln,safety zone and tertiary air duct.

关 键 词：水泥窑 单晶相莫来石 抗碱侵蚀性能 体积密度 热震稳定性 导热系数 

分 类 号：TQ175.712.1[化学工程—硅酸盐工业]