东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (1): 97-99+104.DOI: -

• 论著 • 上一篇    下一篇

加热炉内炉气的发射率和吸收率研究

崔苗;陈海耿;陈宇;吴彬;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-01-15 发布日期:2013-06-22
  • 通讯作者: Cui, M.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(2006CB601203)

Study on emissivities and absorptivities of gas in reheating furnace

Cui, Miao (1); Chen, Hai-Geng (1); Chen, Yu (1); Wu, Bin (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-01-15 Published:2013-06-22
  • Contact: Cui, M.
  • About author:-
  • Supported by:
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摘要： 区别了加热炉内炉气对炉壁及其对钢坯的平均射线行程,给出计算炉气对炉壁及其对钢坯的平均射线行程的简化表达式,并应用Gauss-Laguerre积分公式计算上述平均射线行程.考虑加热炉内炉气的非灰辐射特性,指出三元辐射体系(炉气-炉壁-钢坯)中炉气存在2种发射率和6种吸收率.以某轧钢厂的一座步进梁式加热炉为例,采用Leckner级数式模拟各炉段上炉膛炉气的发射率和吸收率.结果表明,对加热炉内炉气的发射率和吸收率进行上述的区别处理是必要的,为准确求解炉膛内的辐射热交换创造了条件.

关键词: 加热炉, 非灰辐射, 平均射线行程, 发射率, 吸收率

Abstract: The mean beam lengths of furnace gas to wall and to slab in reheating furnace are distinguished, then the simplified expressions to calculate them are given by the Gauss-Laguerre integration. It is supposed that there are two kinds of emissivities and six kinds of absorptivities of the furnace gas in a ternary model considering the non-gray radiation properties of the gas. The emissivities and absorptivities of furnace gas in upper hearth of a walking beam reheating furnace were simulated introducing the Leckner scries. The results showed that distinguishing the emissivities and absorptivities is necessary for correctly calculating the radiative heat exchange in reheating furnace.

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