Abstract：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.
2015, Vol. 25 
