一高炉1999年4月24日夜班开始,炉温大跌,炉况失常,一直延续至4月29日白班.通过分析,找到了炉温大凉的原因,于是采取了逐步调轻反应负荷和综合负荷,减风降压操作,积极检查并掐断冷却系统漏水等措施,终于使炉温回升,炉况转入正常,避免了产生炉缸冻结危险事故. A blast furnace started on the night shift on April 24, 1999. The furnace temperature dropped greatly and the furnace was in a disorderly condition, continuing to the day shift on April 29. Through the analysis, it found the reason that the furnace temperature was too cold and the temperature was gradually reduced and the reaction load Comprehensive load, wind reduction operation, and actively check and cut off the cooling system leaks and other measures, and finally make the temperature rise, the furnace turned normal, to avoid the risk of freezing hearth.