高炉炉缸侧壁碳复合砖残余厚度和热面处保护层厚度传热模型分析
Heat transfer model analysis of residual thickness of carbon composite brick on the sidewall of blast furnace hearth and thickness of protective layer at hot surface
曹楗 1王翠 1张建良 2焦克新 2宋明波2
作者信息
- 1. 北京科技大学绿色低碳钢铁冶金全国重点实验室,北京 100083
- 2. 北京科技大学冶金与生态工程学院,北京 100083
- 折叠
摘要
山东泰山钢铁集团有限公司(简称泰钢)1号高炉自2019年10月开炉投产以来,炉缸热电偶温度基本保持较低的温度.通过建立一维稳态传热模型计算碳复合砖的残余厚度和热面处保护层的厚度.结果表明,炉缸底部侧壁的碳复合砖侵蚀量较少,炉缸铁口中心线附近碳复合砖侵蚀量较多,高炉炉缸区域未出现"象脚状"侵蚀.高炉炉缸内保护层的厚度随着高度的增加而增大,富铁保护层易在铁口中心线以下形成,富渣保护层易在铁口中心线以上形成.碳复合砖中的主要成分氧化铝几乎不与铁水发生反应,而二氧化硅会与铁水发生反应.铁水渗透进入碳复合砖的临界孔隙为2.030 μm,远大于其平均孔隙0.238 μm,因此,采用碳复合砖有利于抵抗铁水的侵蚀.
Abstract
Since the No.1 blast furnace of Shandong Taishan Iron and Steel Group Co.,Ltd.was put into operation in October 2019,the temperature of the cylinder thermocouple has remained consistently low.To calculate the residual thickness of the carbon composite brick and the thickness of the protective layer at the hot surface,a one-dimensional steady-state heat transfer model was established.The results show that the erosion of carbon composite bricks on the bottom sidewalls of the hearth is low,while the erosion of carbon composite bricks near the center line of the taphole of the hearth is high.Additionally,there is no evidence of"elephant foot"erosion in the hearth area of the blast furnace.The thickness of the protective layer in the blast furnace increases with height.An iron-rich protective layer is easily formed below the center line of the taphole,while a slag-rich protective layer is easily formed above it.The carbon composite brick's main component,alumina,hardly reacts with molten iron,while silica does react with it.The molten iron's critical radius that penetrates the carbon composite brick is 2.030 μm,while is much larger than its average pore size of 0.238 μm.This characteristic helps to resist the erosion of iron.
关键词
高炉/碳复合砖/保护层/侵蚀/渗透Key words
blast furnace/carbon composite brick/protective layer/erosion/penetration引用本文复制引用
出版年
2024
NETL
NSTL
万方数据