炉膛高度对步进式轧钢加热炉性能的影响

doi:10.12034/j.issn.1009-606X.217309

过程工程学报 ›› 2018, Vol. 18 ›› Issue (3): 551-556.DOI: 10.12034/j.issn.1009-606X.217309

炉膛高度对步进式轧钢加热炉性能的影响

李浩1，戴方钦1*，丁翠娇2，郭悦1

1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，湖北武汉 430081； 2. 宝武钢铁集团宝钢股份中央研究院武汉分院，湖北武汉 430080

收稿日期:2017-08-14 修回日期:2017-10-26 出版日期:2018-06-22 发布日期:2018-06-06
通讯作者: 戴方钦 daifangqin@wust.edu.cn

Effect of Furnace Height on Performance of Walking-beam Reheating Furnace

Hao LI1, Fangqin DAI1*, Cuijiao DING2, Yue GUO1

1. Key Lab for Ferrous Metallurgy and Resources, Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China; 2. Baowu Iron and Steel Group, Wuhan Branch of Baosteel Central Research Institute, Wuhan, Hubei 430080, China

Received:2017-08-14 Revised:2017-10-26 Online:2018-06-22 Published:2018-06-06
Contact: DAI Fang-qin daifangqin@wust.edu.cn

摘要/Abstract

摘要： 以能量平衡为基础，采用辐射段法模型建立了炉气段、炉围段和钢坯表面段的能量方程组，通过钢坯表面的热流与内部导热方程耦合求解，其中炉气和炉围的温度场采用主变量修正法求解，钢坯温度场采用隐式有限差分求解，与现场实测板坯温度对比验证模型的准确性，分析了上炉膛各段高度对钢坯温度场及排烟温度的影响. 结果表明，预热段高度在0.5~0.9 m，高度每增加0.2 m，钢坯出炉时上表面温度升高约2.8℃，排烟温度降低约10℃；加热一段高度在0.9~1.9 m，高度每增加0.2 m，钢坯出炉时上表面温度平均增加2.5℃，排烟温度平均降低8.5℃；加热二段和均热段高度变化对钢坯出炉时表面温度及排烟温度影响不大. 合理确定预热段和加热一段高度有利于钢坯加热并节省燃料消耗.

关键词: 炉膛高度, 步进式轧钢加热炉, 段法, 水冷梁, 钢坯温度, 排烟温度

Abstract: Based on energy balance, energy-balance equations for gas volume zones, furnace surface zones and slab surface zones were set up by radiation zonal method, by the slab surface heat flow and internal thermal equations coupling solution. And the temperature profiles of gas volume zones and furnace surface zones were obtained by using the main variable correction method, the slabs temperature profiles by finite difference method. The correctness of the model was verified by comparing the slab temperature with the actual situation. The influence of the height of the upper furnace on the temperature field and the exhaust gas temperature of the slab were analyzed. The results showed that for the preheating section height of 0.5~0.9 m, with the height of each increase of 0.2 m, the upper surface temperature before the slab released increased by about 2.8℃, the exhaust temperature decreased by about 10℃. For the first heating section of height of 0.9~1.9 m, with the height of each increase of 0.2 m, the upper surface temperature before the slab released increased by about 2.5℃, the average exhaust gas temperature decreased by 8.5℃. The influence of the height on the temperature of the second heating section and the soaking section were not significant. It can be seen that it was reasonable to determine the height of the preheating section and the heating section to facilitate the heating of the slab and fuel consumption saving.

Key words: furnace height, stepping rolling reheating furnace, zone method, water-cooled beam, slab temperature, exhaust temperature

李浩戴方钦丁翠娇郭悦. 炉膛高度对步进式轧钢加热炉性能的影响[J]. 过程工程学报, 2018, 18(3): 551-556.

Hao LI Fangqin DAI Cuijiao DING Yue GUO. Effect of Furnace Height on Performance of Walking-beam Reheating Furnace[J]. Chin. J. Process Eng., 2018, 18(3): 551-556.

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炉膛高度对步进式轧钢加热炉性能的影响

Effect of Furnace Height on Performance of Walking-beam Reheating Furnace

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