MATERIAL INJECTION INTO BLAST FURNACE AND EVOLUTIONAL TREND

Present state and action of several BF material injection processes are introduced.It is indicated that every material,which may be fed into BF through the furnace roof in the form of lump,can be injected into BF at tuyere as powder,which is taken for an adjustable means required to achieve high quality,high yield, low consumption and long life. Combined injection method mainly based on pulverized coal injection should be taken as the developing trend of BF injection in consideration of the environmental protection and the secondary resource utilization. It is suggested that the combined injection and combustible waste material injection into BF, such as waste plastics and tyre, should be researched further.