冲天炉过热区热交换机理新探

本文通过模拟研究,得出了冲天炉过热区内对铁水的四种传热方式的传热系数。四种传热方式中,焦炭对铁水的接触传热与辐射传热共占85％左右,焦炭表面燃烧温度的高低对热交换有决定性的影响。焦炭表面温度与炉气温度有较大差别,它主要受焦炭性能影响,是衡量铸造用焦炭质量的一项不可替代的综合性指标。

A New Approach to Heat Transfer Mechanism in the Cupola Bed

Different heat transfer coefficients have been obtained from a series of experiments aimed to simulate the heat transfer to molten iron droplets in the coke bed of a cupola. The heat transfer from coke by contact and by radiation amounts to 85 percent of the total heat flow, and the surface combustion temperature of the coke is the key factor affecting the efficiency in heating the molten metal. The surface temperature of the coke is guite different from that of the gas and it is mainly affected by the properties of the coke. The coke surface temperature is regarded as a unique and overall quality index for foundry coke.