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一、概况 我厂100米~3高炉1978年大修改为自立式。1982年大修时,炉底、炉缸、炉腹、炉腰和炉身下部改为自焙碳砖砌筑,使用约一年后,炉腹以上自焙碳砖内衬基本浸蚀殆尽,由渣皮保护炉壳,加之操作不当,冷却不良,该处炉壳多次出现红点,最后导致炉缸以上炉身下部炉腹上下环带炉壳严重变形达70％,凸凹不平度局部超过100毫米以上,炉体倾斜达2°,热风围管与风口严重错位,风口跑风严重,高炉安全生产受到威胁。经研究决定1985年大修。
First, the overview of our plant 100 m ~ 3 blast furnace 1978 major modifications to free-standing. Overhaul in 1982, the bottom of the hearth, hearth, belly, waist and the lower part of the body into a self-baking carbon brick masonry, about a year after the use of baked belly above the basic erosion of carbon-lined brick lined, By the skins to protect the furnace shell, combined with improper operation, poor cooling, where the shell repeatedly appear red dot, and finally lead to the hearth above the lower body of the furnace belly up and down the ring furnace shell serious distortion of up to 70%, irregularities locally exceeded 100 mm or more, the furnace tilted up to 2 °, hot air duct and tuyere serious dislocation, outlet winds serious, blast furnace safety is threatened. The study decided to overhaul in 1985.