包钢某座高炉陶瓷杯侵蚀模型研究.pdf

第32卷第6期
矿冶工程
Vol 32 No6
2012年12月
MINING AND METALLURGICAL ENGINEERING
December 2012
包钢某座高炉陶瓷杯侵蚀模型研究
王瑞军,陈革,陈良玉,刘芳
(1.包钢(集团)公司技术中心,内蒙古包头014010:2.东北大学,辽宁沈阳110004)
摘要:以炉缸埋设的热电偶測暈数据为依据,采用有限元法建立炉缸侵蚀数学模型,构造带有移动内边界的有限元模型和侵蚀
计算流程。由于侵蚀边界的未知性,计算中必须先假定一个边界,再根据测温数据来移动边界,实现循环计算。建立了一种二维有
限元搜索内衬侵蚀的自动通近计算方法,解决了相关技术难点,开发了完整的计算程序,从而实现了高炉炉缸内衬侵蚀的计算由一
维技术向二维技术的突破。通过包钢某座高炉在线运行,侵蚀线和渣铁线的确定、真实地反映了炉内情况,为侵蚀模型指导高炉生
产奠定了基础。
关键词:高炉内衬;陶瓷杯侵蚀;数学模型;有限元法
中图分类号:TF748
文献标识码:A
文章编号:0253-6099(2012)06-0082-04
Study on Erosion Model for Ceramic Cups of a Blast Furnace in BISGC
WANG Rui-jun, CHEN Ge, CHEN Liang-yu, LIU Jing
( 1. Technical Center, Baotou Iron &Steel Group Co Ltd, Baotou 014010, Inner Mongolia, Chind; 2. Northeastern
University, Shenyang 110004, Liaoning, China
Abstract Based on the measured data by the thermocouple of a buried hearth, a finite element method was adopted to
establish a mathematical model for hearth erosion, a finite element model with mobile internal boundary and an erosion
calculating procedure. Since the erosion boundary was unknown, a boundary had to be assumed first in the calculation
then moved according to the measured temperature data to realize loop calculations. An automatic approximation calcula
tion method for two-dimensional finite element search of lining erosion was established to solve the relative technical
difficulties so that a complete computing program was developed, realizing a breakthrough from one dimensional to
two-dimensional technology in the calculation of lining erosion of blast furnace hearth. The conditions in a blast furnace
in BISGC were factually reflected through the on-line operations of the furnace and the determination of erosion line and
slag iron line. It has laid a foundation for the guidance of the erosion model in the blast furnace productions
Key words: blast furnace lining; ceramic cup erosion; mathematical model; finite element method
包钢某座容积为1800m3高炉的炉缸为陶瓷杯+之间的环向传热,高炉炉缸可视为轴对称体,可以取
炭砖结构。炉缸炉底布置8层热电偶。热电偶温度只个子衝来研究炉缸的热过程。
能反映内树温度分布,热电偶越多反映温度分布越充
图1为以外层热电偶为外边界的简化模型,边界
分,但不能精确反映内衬侵蚀的定量程度,这是热电偶上的温度可用测温数据拟合,用于渗铁凝固线法讦算
测温的局限。解决这种局限需要合理的数学模型。为内衬侵蚀边界。这个模型求解区域较小,计算规模较
避免炉缸炉底严重侵蚀甚至烧穿等重大事故,开发炉小,计算定解时间少。
缸炉底侵蚀数学模型是非常有必要的。
1.1.2侵蚀边界的确定
炉缸侵蚀模型的建立
设铁水凝固温度为7(一般T取1150℃),当炭
砖发生侵蚀时,等温线7在内衬中。初设一个T、边
1.1基于空间轴对称导热模型的二维侵蚀计算方法界,按照轴对称导热方程计算得到各个内层热电偶处的
1.1.1模型简化
温度值Tc,与对应位置热电偶的测试温度Tr作对比
若不考虑铁口的结构与其它部位的差异和子午面当满足判定条件式(1)或式(2)时,得到侵蚀边界。
①收稿日期:2012-06-07
作者简介:王開军(1972-),男,内蒙市卡镇市人,高级「程师.主要从小炼铁にど研究