太钢3号铜冷却壁高炉定检快速恢复实践

 太钢3号高炉在炉腰至炉身下部安装了4层铜冷却壁，由于铜冷却壁的高导热性，使3号高炉在定检恢复时，多次出现渣皮脱落，热负荷波动频繁，严重时出现炉凉、崩料和煤气流失常等事故。针对定检后炉况难恢复的特点，3号高炉通过制订详细的定检休、送风计划，在送风后按目标节点恢复风、氧量，并对喷煤、风温、燃料比、渣铁热量和渣铁排放等进行量化控制，实现了定检35 h以上，20～24 h的成功快速恢复。

Missile Detection Quickly Recover Practices of No.3 Blast Furnace With Copper Cooling Stave in TISCO

Four layers of copper cooling stave were stalled from bosh to stack of No.3 blast furnace TISCO．Due to the high thermal conductivity of copper cooling stave，during blowing recovery after overhaul，some occurrences and accidents had to face，such as slag skin peeling，frequent fluctuations of heat load，even collapse and loss of gas of furnace cooling．According to the problems above mentioned，through stipulating for plan of the missile detection recovery in detailed，blowing air and enriched oxygen according to the target value，and quantificationally controlling the PCI，blast temperature，fuel ratio，hot metal and slag tapping，fast recovery of furnace conditions in 20-24 h can be achieved after above 35 h missile detection．