重要的使命焦炭不仅是高炉的燃料,还是炼铁的原料。因为矿石中的铁,主要是铁的氧化物。焦炭首先与热风中的氧作用,氧化成二氧化碳,并放出大量的热来。高温的二氧化碳在炉内上升时,遇到焦炭,而生成强还原性的一氧化碳。一氧化碳遇到矿石,就和铁的氧化物发生反应,使铁还原出来。只有这样,才能把铁炼出来。也许你会说,焦炭是用煤炼出来的,煤的成分主要也是碳,为什么非得用焦炭,直接用 Important Mission Coke is not only the fuel for blast furnaces but also the raw material for ironmaking. Because iron in ore is mainly iron oxide. The coke first reacts with the oxygen in the hot air, oxidizes to carbon dioxide, and releases a large amount of heat. When high-temperature carbon dioxide rises in the furnace, it encounters coke and produces strong reducing carbon monoxide. When carbon monoxide meets the ore, it reacts with iron oxides to reduce the iron. Only in this way can iron be refined. Maybe you would say that the coke is made out of coal. The composition of the coal is mainly carbon. Why do you have to use coke directly?