High efficiency and long campaignship blast furnace for the 21st century

Iron output and ironmaking technology have been increased quickly and devel oped rapidly in China since 1978. The main technologies are of pulverized c oal injection, and extending blast furnace life. In our consideration, the key points of blast furnace technologies in China for the 21st century are: (1) long campaign life blast furnace, i.e., blast furnace campaign life ca n be more than 15 years. The life of coolers determines blast furnace campa ign life, and the blast furnace coolers of new design, through heat transfe r calculating, can stand for more than 15 years. (2) High efficiency blast furnace; this implies (1) making conventional blast furnaces with high effi ciency, i.e., the cost of iron can be lowered by 10-15% in the near future, the average productivity reaching more than 2.0 t/m(3) d. The coal injecti on rate will reach 150-200 kg/t and blast furnace campaign life will be pro longed to 15 years or so; blast furnace modern control and maintenance tech nologies are adopted. (2) The technique of the full oxygen blast furnace wi ll be developed further and applied.