摘要
为定量评估周转过程中钢包的蓄热及各表面散热对钢液温度的影响,实现转炉出钢温度的精准控制,以210t钢包为研究对象,通过全隐式格式对偏微分方程进行离散化,建立了基于有限体积法的钢包二维非稳态传热数学模型。采用迭代法对方程进行求解,并利用C编程语言实现了数值算法,且使计算速度满足了在线工业应用的时效性要求。结果表明,钢包正常周转过程中,工作层温度变化最为显著,其内表面温度变化可达630K。包壳外表面温度分布从下至上呈逐渐上升趋势,其表面温差可达160K。钢包蓄热及各表面散热造成的钢水温降主要集中在21~28K,出钢、满包无盖及满包传搁过程中,钢包蓄热及各表面散热造成的钢液温降速率分别约为0.74、1.32、0.31K/min。该模型已部署在企业生产过程管理系统上,得到实际运用,其计算结果为合理制定钢包温度制度提供了一定的依据,也为继续深入探究钢包热状态对钢液温度的影响奠定了基础。
To quantitatively evaluate the impact of ladle heat accumulation and surface heat dissipation on molten steel temperature during turnover processes and achieve precise control of converter tapping temperature,a 210 t la-dle was selected as the research object.A two-dimensional unsteady-state heat transfer mathematical model of the la-dle was established based on the finite volume method,with partial differential equations discretized using a fully im-plicit scheme.The equations were solved iteratively,and the numerical algorithm was implemented using C pro-gramming language,meeting the real-time requirements for online industrial applications.Results indicate that during normal ladle turnover,the working lining exhibits the most significant temperature variation,with its inner surface temperature fluctuation reaching 630 K.The outer surface temperature distribution of the shell shows a gradual upward trend from bottom to top,with a surface temperature difference of up to 160 K.The temperature drop of molten steel caused by ladle heat accumulation and surface heat dissipation mainly ranges from 21 K to 28 K.During tapping,full ladle without cover,and full ladle transfer processes,the corresponding cooling rates of molten steel due to ladle heat accumulation and surface heat dissipation are approximately 0.74,1.32 and 0.31 K/min,re-spectively.This model has been deployed in the enterprise's production process management system for practical ap-plication.The calculation results provide a basis for reasonably formulating ladle temperature regimes and lay a foundation for further investigation into the influence of ladle thermal state on molten steel temperature.
作者
秦永坤
赵艳宇
程树森
QIN Yongkun;ZHAO Yanyu;CHENG Shusen(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Steelmaking Operation Department,Beijing Shougang Co.,Ltd.,Qian'an 064404,Hebei,China)
出处
《中国冶金》
北大核心
2025年第6期54-64,73,共12页
China Metallurgy
基金
国家自然科学基金资助项目(62071034)。
关键词
钢包
温度分布
热状态
数学模型
温降
ladle
temperature distribution
thermal state
mathematical model
temperature drop
作者简介
秦永坤(1997-),男,硕士生,E-mail:QinYKustb@163.com;通信作者:程树森(1964-),男,博士,教授,E-mail:chengsusen@metall.ustb.edu.cn。
