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在冲天炉烟囱部分安装一个以辐射传热为主的换热器,部分利用炉气燃烧的化学热和物理热,在具有合理的结构及掌握了操作技术以后,能使换热器出口的空气预热到400~450℃。将近三年的生产实践说明:由于有高于300℃的热风送入炉内,强化了底焦的燃烧过程,使铁水温度稳定于1420~1450℃范围内,给铸造生产带来了显著效果,铸件质量有所提高,废品率降低了,元素烧损较冷风熔炼时为低,从而降低了铸件成本。此外,热风熔炼也大大减轻了大炉工人的劳动强度。
In the cupola chimney part of the installation of a radiant heat transfer based heat exchanger, part of the use of furnace gas combustion of chemical heat and physical heat, with a reasonable structure and master the operation of the technology, the heat exchanger can make the air outlet Preheat to 400 ~ 450 ℃. Nearly three years of production practice shows that: due to the hot air above 300 ℃ into the furnace, and strengthen the bottom coke combustion process so that the molten iron temperature stabilized at 1420 ~ 1450 ℃ within the scope of the cast to bring a significant effect, Casting quality has improved, the rejection rate is reduced, the elemental burning is lower than the cold air melting, thus reducing the casting costs. In addition, hot air smelting also greatly reduced the labor intensity of the furnace worker.