新钢11号高炉焖炉及休复风操作实践

Operation Practice of Soaking Furnace and Closed Wind of Xingang 11 # Blast Furnace

重点对新钢11号高炉焖炉及休复风过程进行全面阐述。根据历届操作实践经验,焖炉前几天采取控煤比、减轻负荷、保证充足的物理热、提前1个周期适当降碱、下休风料时集中大幅降碱等措施,确保铁渣有良好的流动性,活跃炉缸,使渣铁排空。复风时采取控煤放轻负荷、“偏堵风口”及铁口埋氧枪作业加热炉缸等技术,实现了高炉焖炉120 h,复风2 d内达产、达标,为同行业的类似高炉操作提供经验。

In this paper,soaking furnace and recovery process of Xingang 11#blast furnace are fully expounded.Based on the practical experience of previous operations,measures such as controlling the coal ratio,reducing load,ensuring sufficient physical heat,appropriately reducing alkali one cycle in advance,and concentrating and significantly reducing alkali during the shutdown of air materials are taken a few days before the soaking furnace to ensure good fluidity of iron slag,activate the furnace hearth,and empty the slag and iron.In the air return,technologies such as coal control and light load,"partial air outlet"and iron mouth oxygen gun are adopted to achieve the blast furnace for 120 h and reach the standard within two days of air return,providing experience for similar blast furnace operation in the same industry.