鞍钢7号高炉复合炉缸的结构特点与中修调查

Structure Characteristics and Partial Relining Investigation of a Compound Hearth

论述了鞍钢 7号高炉自焙炭块 -陶瓷砌体复合炉缸的结构特征 ;指出了结构设计中需改进的问题 ;分析了五年中修停炉后对复合炉缸结构状况的调查结果 ,认为风口下三层局部区域自焙炭块疏松脆化的主要原因是疏松层部位没有达到自焙温度、碱金属侵入蚀损所致·停炉打水浸泡后 。

Structure characteristics of compound hearth with self baking carbon block and ceramic brickwork were examined for the No.7 BF at Anshan Iron and Steel Company,and some weakness on the hearth design were discussed in detail .Analyses of the investigation results about the blowing out for partial relining after five year service reveal that chief causes of the looseness and brittleness of the carbon block at some local areas from first to third layers under the BF′s tuyers are respectively that temperature is not high enough to bring about the graphitization of the carbon block ,that alkalic metals entering the carbon block causes a chemical erosion and that the looseness and brittleness are intensified by water sprayed cooling after the blowing out.