水泥窑过渡带用低导热多层复合砖研究(Ⅰ):多层复合结构的设计  

Research on low thermal conductivity multi-layer composite bricks for transition zone of cement kiln(Ⅰ) :Design of multi-layer composite structure

作　　者：袁林[1] 陈松林[1,2] 王俊涛 李泉侑[3] 李沅锦 Yuan Lin Chen Songlin Wang Juntao Li Quanyou Li Yuanjin(Ruitai Materials Technology Co., Ltd., China Building Materials Academy, Beijing 100024, China)

机构地区：[1]中国建筑材料科学研究总院瑞泰科技股份公司,北京100024 [2]宜兴市耐火材料有限公司,江苏宜兴214200 [3]郑州瑞泰耐火科技有限公司,河南郑州452374

出　　处：《耐火材料》2017年第5期366-369,共4页Refractories

基　　金：国家科技支撑计划(2013BAE03B01-10);宜兴市重点研发计划(No.YGB2016020)

摘　　要：为减少水泥窑的过度散热和安全运行隐患,采用工作层(硅莫砖,厚0.140 m)、保温层(轻质莫来石,厚0.035 m)、隔热层(含ZrO_2的陶瓷纤维板,厚0.025 m)的3层复合设计方法,研究了低导热多层复合砖的保温层的结合界面方式和受力分析,并计算了该复合砖的综合热导率。结果表明:多层复合砖的工作层和保温层的结合界面采用正弦曲面结合方式,保温层和隔热层的结合界面采用135°坡形结合方式的设计,可使复合砖中间层(保温层)的应力集中较少;多层复合砖的综合热导率由原来使用非复合砖(即硅莫砖)的2.74 W·m^(-1)·K^(-1)降低到1.50 W·m^(-1)·K^(-1)。将该多层复合砖实际应用于水泥窑过渡带时,使水泥窑筒体外壳温度比采用非复合砖的降低了50~70℃。In order to restrain thermal loss and potential safety hazards in cement kilns, a design of three lay- ers,namely a working layer （mullite-SiC brick,0. 140 m in thickness）,a thermal preservation layer （light weight mullite,0.035 m in thickness） ,and a thermal insulation layer （ceramic fiber board containing ZrO=, 0. 025 m in thickness）,was adopted to research the boundary combination method and strain distribution of the thermal preservation layer of low thermal multi-layer conductivity bricks, and the overall thermal con- ductivity was calculated. The results show that sinusoidal shaped boundary combination between the work- ing layer and the thermal preservation layer, slope-shape with angle of 135 degrees between the thermal preservation layer and the thermal insulation layer can relieve the strain concentration. The comprehensive thermal conductivity of the multi-layer composite brick decreases from the original mullite-SiC brick 2.74 W·m^1·K^-1 to 1.54 W·m^-1· K^-1. When applied this composite mullite in the transition zone of a cement kiln,the temperature of the kiln shell lowered by 50 -70℃ than using normal bricks.

关 键 词：低导热砖 多层复合结构 水泥窑过渡带 节能 

分 类 号：TQ175.7[化学工程—硅酸盐工业]