8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

The blast furnace (BF) crucible breakout is not uncommon. More and more attentions have been paid on the penetration of molten iron and hearth lining erosion of BF. The iron skull, which is a layer of iron attached on the inner surface of the lining, provides a barrier between carbon brick and molten iron. Formation of a stable iron skull on the inner surface of the hearth lining could largely protect the carbon brick and extend BF campaign life. In this work, the molten iron in condition of high pressure was simulated to figure out the penetration between carbon brick and molten iron in the BF. The influence on combined form between iron skull and carbon brick during the campaign life of blast furnace was also discussed. The experimental samples were analyzed by X-ray diffraction, scanning electron microscopy to explore the distribution of microstructure between carbon and iron inside the carbon-iron composite material. This work is expected to have a guiding significance for prolonging the campaign life of blast furnace.