首钢长钢八号高炉计划检修快速恢复实践

Rapid Recovery Practice of Planned M aintenance of Shougang Changgang No.8 Blast Furnace

首钢长钢八高炉有效容积1080m^(3),20个风口,2个铁口。2023年3月8日计划检修16h,实际用时14h 27min。本次检修主要内容更换溜槽、挖补南铁口、高炉炉体灌浆等。高炉检修后8日20:45开风,9日02:25风口全开,风量、负荷恢复正常水平,恢复时间5h 40min。本次计划检修快速恢复主要措施;休风前保证炉况长期稳顺、休风料位置合理、退负荷力度到位、休风后保温效果好、开风后上风喷煤富氧等节奏控制恰当。

The effective volume of Shougang Changgang No.8 blast furnace is 1080 m^(3),with 20 tuyeres and 2 iron nozzles.On March 8,2023,the planned maintenance period was 16 hours,with an actual time of 14 hours and 27 minutes.The main contents of this maintenance include replacing the chute,digging and repairing the south iron mouth,and grouting the blast furnace body.Afer the blast furnace maintenance,the air was opened at 20:45 on the 8 th,and the tuyere was fully opened at 02:25 on the 9 th.The air volume and load returmed to normal levels,with a recovery time of 5 hours and 40 minutes.The main measures for rapid recovery during this planned maintenance;Before the shutdown,ensure that the furnace condition is stable and smooth for a long time,the position of the shutdown materials is reasonable,the unloading force is in place,the insulation effect is good after the shutdown,and the rhythm control is appropriate,such as injecting coal and oxygen into the upwind after the shutdown.