预热带在炉子的上部,它的作用是进行炉料的预热,这时的炉料都是呈固体状态,化学变化进行得很有限。炉料逐渐下降,温度则逐渐上升。熔化带在预热带下,铁块的熔化就处于这个地区,由上面来的生铁就在这个区域的下部转变为液体状态,一滴一滴地向下滴落。熔化区的高度在一定程度上是由底焦的高度来决定的。底焦过高,熔化区域也升高,这样会更多地消耗焦炭;如果底焦过底,熔化区就会靠近风口附近,这样使下面的过热带缩短, Preheating in the upper part of the furnace, its role is to charge the preheating, when the charge is solid, the chemical changes have been limited. Burden gradually decreased, the temperature gradually increased. Melting zone In the preheat zone, the melting of the iron is in this area, from above the pig iron in the lower part of this region into a liquid state, dripping down dripping. The height of the melting zone is to some extent determined by the height of the bottom coke. End coke is too high, the melting area is also increased, it will consume more coke; if the end of the bottom coke, the melting zone will be near the tuyere, so that the following tropical over shortening,