灼热的铁水通过炉缸流入前炉时,由于此处缺乏氧气和二氧化碳,底焦不再燃烧,而铁水温度稍有降低。有的厂采用打开渣口操作,设想能借引进的空气,使底焦部分燃烧,以提高铁水温度。但是,我厂的实践表明:这么做,底焦燃烧过大,熔化带因此下降,实际铁水温度并未提高;此外,过桥 When hot hot metal flows into the forehearth through the hearth, the bottom charred no longer burns due to the lack of oxygen and carbon dioxide here, while the hot metal temperature slightly decreases. Some factories use open slag mouth operation, envisaged to be able to borrow the introduction of air, the bottom coke part of the combustion, in order to improve the hot metal temperature. However, the practice in our plant shows that in doing so, the bottom coke burns too much, the melting zone therefore drops, and the actual hot metal temperature does not increase. In addition,