CO燃烧成CO2放出的热量超过C燃烧成CO时放出的热量的4倍。因此，二次燃烧是提高生产率、降低电能消耗的简单的成本效益法。在镜面渣的电弧炉中，二次燃烧会增加炉膛上部和烟道的热负荷。在采用泡沫渣时，二次燃烧主要在接近炉渣或熔渣内部进行，主要靠手控氧枪或安装在主氧枪铁 Combustion of CO to CO2 releases more than four times the amount of heat that C emits when it burns into CO. Therefore, secondary combustion is a simple cost-effective method of increasing productivity and reducing electricity consumption. In the mirror slag arc furnace, secondary combustion will increase the heat load on the furnace top and flue. In the use of foam slag, secondary combustion mainly in the slag or slag near the internal, mainly by hand-controlled oxygen lances or installed in the main oxygen lance iron