高炉炉缸炭砖脆化层的形成是危及高炉寿命的重要原因之一．调查表明，脆化层处于环裂缝外侧，环裂缝与热面间炭砖结构致密．脆化层中渗铁量低、孔隙度高、灰分未增加、碳结构的晶面距小．研究指出，脆化层是由于炭砖中的沥青粘结剂炭化后的炭框架氧化所致．为提高碳质耐火材料质量，除采用高温煅烧无烟煤，改进生产工艺外，应开发新型粘结剂 The formation of blast furnace hearth carbon brick embrittlement layer is one of the important reasons that endanger the life of the blast furnace. Investigation shows that the embrittlement layer is outside the ring crack, and the carbon brick between the ring crack and the hot surface is dense. Brittle layer of low permeability of iron, high porosity, ash did not increase, the crystal structure of the crystal plane from the small. The study indicates that the embrittled layer is due to oxidation of the charcoal frame after carbonization of the asphalt binder in the charcoal brick. To improve the quality of carbonaceous refractories, in addition to using high-temperature calcined anthracite, to improve the production process, the development of new binders