基于传热的烧结料层温度分布模型  

Sintering bed temperature distribution model based on heat transfer

作　　者：龙红明[1] 范晓慧[2] 毛晓明[2] 姜涛[2] 陈许玲[2] 

机构地区：[1]安徽工业大学冶金与资源学院,安徽马鞍山243002 [2]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2008年第3期436-442,共7页Journal of Central South University:Science and Technology

基　　金：教育部新世纪人才支持计划项目(NCET-5-0690);中南大学研究生教育创新工程基金资助项目(042310011)

摘　　要：通过分析烧结过程传热机理，结合烧结过程的物理、化学变化特征，将烧结料层分烧结矿带、燃烧带、干燥预热带和湿料带分别建立传热控制方程。采用宝钢烧结厂现场生产参数进行求解，得到生产稳定条件下的料层温度分布，根据温度分布规律，绘制出料层各带分布图形。研究结果表明：在正常条件下，湿料带在烧结机纵向长度约70％处消失，干燥预热带在烧结机纵向长度80％-90％处消失；干燥预热带的厚度变化呈现薄-厚-薄的趋势，在纵向40％-50％处达到最大，占整个料层的18％；燃烧带的厚度总体上呈逐渐变厚的趋势，但在纵向中部略变薄，最厚时达到整个料层高度的9％；高配比褐铁矿烧结过程与以磁铁矿或赤铁矿为主的烧结过程相比，呈现出如下新特性：干燥预热带对烧结过程的影响减弱；烧结过程透气性主要决定于燃烧带和湿料带的厚度。Heat transfer control equations of sintering product zone, combustion zone, preheating and drying zone and wet mixture zone were respectively established based on profound analysis of heat transfer mechanics, physical and chemical change of sintering process. The equations were solved after using the practical parameters of Bao Steel sinter plant, and the temperature distribution of sinter bed under the condition of stable production was gained. According to the regularity of temperature distribution, the graph of sinter bed layers distribution was worked out. The results show that under normal condition, wet zone disappears on the spot of 70% of sintering longitudinal direction; preheating and drying zone is 80%-90%. The thickness tendency of preheating and drying zone is thin-thick-thin, and its maximal thickness is 18% of the whole bed at the point of 40%-50% of sintering longitudinal direction. The thickness of combustion zone increases gradually as a whole and its maximal thickness is 9% of the whole bed. New characteristic is shown by contrasting of limonite and magnetite or hematite sintering process： the influence of preheating and drying zone becomes weak; the determinant of sintering permeability is the thickness of combustion zone and wet mixture zone.

关 键 词：烧结 传热 温度分布 

分 类 号：TF046[冶金工程—冶金物理化学]