大气湿度随着季节的变化而变化,这样会直接影响高炉操作,从而导致炉子热状况和炉料下降不稳定。为了减少这种波动,从1954年起,人们开发了蒸汽鼓风技术,向鼓风内添加蒸汽,使鼓风湿度维持在一定水平,取得了提高高炉生产率和降低燃料比的效果。后来,高炉采用喷油技术之后,便停止使用蒸汽鼓风技术。1973年以来,遇到两次石油危机,各钢铁企业的高炉又不得不从以往的喷油操作改为全焦操作。在这种情况下,为了确保炉内铁矿石还原所需要的氢气量和调节风口前燃 Atmospheric humidity changes with the seasons, which will directly affect the operation of the blast furnace, resulting in unstable furnace temperature and load drop. In order to reduce this kind of fluctuation, steam blasting technology has been developed since 1954 to add steam to the blast air to maintain the blow air humidity to a certain level, and to achieve the effect of raising the blast furnace productivity and reducing the fuel ratio. Later, the blast furnace using fuel injection technology, they stop using steam blasting technology. Since 1973, when two oil crises were encountered, the blast furnaces of various iron and steel enterprises had to switch from the previous fuel injection operation to full-power operation. In this case, in order to ensure the amount of hydrogen required for the reduction of iron ore in the furnace and to adjust the tuyere front-burned