自焙碳砖-陶瓷砌体非稳态热传导特点的数学模型分析  

Mathematical Modeling of Heat Transfer in the Hearth Made up by Ceramic and Self Baking Carbon Bricks

作　　者：杜钢[1] 于青[1] 王文忠[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110006

出　　处：《东北大学学报（自然科学版）》1999年第4期411-413,共3页Journal of Northeastern University(Natural Science)

基　　金：国家"九五"科技攻关项目

摘　　要：测定了高炉用自焙碳砖在其自焙烧过程中，导热系数随时间变化规律及其它物理性质·结果表明，自焙碳砖自焙烧过程中导热系数λ与焙烧时间τ可表示为λ＝ ３８３４ ５ ＋ ０００１ ４３ τ·结合鞍钢７ ＃ 高炉生产数据，建立了自焙碳砖陶瓷砌体非稳态热传导的数学模型，并采用数值分析方法对该模型进行了分析求解·其结果表明该模型与实际生产情况比较吻合，除炉底中心部位之外，炉缸耐火材料内衬８００ ℃以上等温线随自焙碳砖石墨化程度的提高逐渐上移至陶瓷砌体层内，从温度场分布角度上看，新型炉缸结构将消除传统结构炉缸所存在弊端，有助于高炉长寿·The thermal conductivity and other characteristics of the self baking carbon brick were examined experimentally. The relationship of the thermal conductivity λ of the self baking carbon brick with sintering time τ was λ =3 834?5+ 0 001?43 τ . Mathematical modeling was carried out on the instability heat transfer process in a new type hearth made by ceramic and self baking carbon bricks. To meet the modeling requirements, the numerical solutions were analyzed and the results are consistent with the practical values. In stability heat transfer process, all the isotherms higher than 800?℃ are in the ceramic and that will be beneficial to lengthen BF life.

关 键 词：自焙碳砖 陶瓷砌体 高炉 热传导 数学模型 

分 类 号：TF065.1[冶金工程—冶金物理化学] TF576.4