在役高炉炉缸状态的辨析、诊断与维护

Discrimination,diagnosis and maintenance for blast furnace hearth in service state

在役高炉炉缸砖衬,由于其不同于原始设计的物性和特殊的结构形态,致使一些传统侵蚀管理模式失效,极端情况引发炉缸烧穿事故。从传热学角度看,炉缸烧穿现象是炉缸侧壁传热体系热平衡被打破后反复累积的极端表现形态。基于传热学理论和用后炉缸砖衬结构调查结果,从炉缸砖衬综合热阻视角,提出对在役高炉炉缸砖衬侵蚀状态的辨析和诊断方法,由此可准确判定在役炉缸的砖衬结构状态,为后续采取适当的维护措施提供决策依据,为高炉安全使用和延长寿命奠定基础。

As the physical properties and configuration of the hearth-wall lining are different from original design,some conventional erosion management methods for blast furnace in service will lose their effectiveness,even more cause the hearth-wall penetration-cross accident.From the view of heat transfer,the penetration-cross is the extreme state after the thermal balance system is broken in the hearth-wall.On the basis of heat transfer theory and the investigation results of the used hearth-wall structure,a discrimination and diagnosis method has been put forward for the error damage state of hearth-wall in service from the view of multiple thermal resistance.By this,the hearth-wall state can be judged accurately,which can provide the decision basis for future management measures and lay the foundations for the safe use and extending the campaign of blast furnace.