近年来,高炉炼铁实现了低硅操作,加之,铁水预处理技术普遍应用,致使转炉内热量有所下降。为此,人们采取了添加焦粉和用广角多孔的二次燃烧枪提高炉内二次燃烧率等方法以补偿炉内热量。然而,加入焦粉可造成钢水中[S]上升;使用二次燃烧枪 In recent years, blast furnace ironmaking to achieve low-silicon operation, coupled with the widespread application of hot metal pretreatment technology, resulting in reduced heat within the converter. To this end, people have taken to add coke powder and the use of wide-angle porous secondary combustion furnace to improve secondary combustion rate and other methods to compensate for the furnace heat. However, adding coke can cause the molten steel to rise [S]; use a secondary burner