武钢高炉炉缸耐火材料结构创新

Structural innovation of refractory materials for blast furnace hearth of WISCO

分析了目前不同炉缸结构的优缺点,介绍了武钢高炉在炉缸耐火材料结构设计上的创新。武钢自2006年起,新建高炉炉缸从冷却壁端至炉内热面,依次砌筑小块炭砖、炭捣料和大块炭砖。小块炭砖尺寸小,可直接顶砌冷却壁;大块炭砖砖缝少,抗铁水渗透性好;同时,炉缸从热端到冷端热导率依次增大,强化了炉缸的传热效果,有利于炉缸内侧自保护渣铁壳的形成。采用上述新型结构的炉缸监测温度正常,预计可以满足一代炉龄20年的服役要求。

The advantages and disadvantages of different hearth structures were analyzed,and the innovation of furnace refractory structure design in WISCO was introduced.Since 2006,the new blast furnace hearth has been built with small carbon bricks,carbon ramming mix and large carbon blocks from the cooling staves to the hot face of the furnace lining in WISCO.The small carbon bricks can directly touch the cooling staves due to the small size,and the large carbon blocks have fewer cracks thus good resistance to hot metal permeability,meanwhile,the thermal conductivity of the hearth increases from the hot end to the cold end,which improves the heat transfer and promotes the formation of the self-protecting slag iron skull inside the hearth.The temperature of the hearth with the new structure mentioned above is monitored and the result is normal,then it is forecast that it can meet the service requirement of a single campaign life of 20 years.