七十年代在精料水平不断提高的条件下,国外高炉向大型化、高效化、自动化发展,同时由于炉内控制技术、高风温、脱湿鼓风、综合喷吹、超高压操作、电子计算机等技术的广泛采用,促使高炉炼铁技术发展到一个较高的水平。许多高炉年平均利用系数达到2以上,焦比≤400公斤,燃料比≤480公斤。近年来,不仅4000～5000米~3的高炉能达到上述先进技术指标,一些1000米~3级的高炉同样也达到了上述指标,这一点,更引起了炼铁界的 In the seventies, under the condition of continuous improvement of fine materials, foreign blast furnaces are becoming larger, more efficient and more automated. At the same time, due to the control technology in the furnace, high air temperature, dehumidification and blower, integrated injection and ultra-high pressure operation, Computers and other technologies widely used to promote blast furnace ironmaking technology to a higher level. Many blast furnaces have an average annual utilization factor of 2 or more, a coke ratio of ≤400 kg and a fuel ratio of ≤480 kg. In recent years, not only 4000 ~ 5000 m ~ 3 blast furnace to achieve the above advanced technical indicators, some 1000 m ~ 3 blast furnace also reached the above indicators, which is even more caused by the iron industry