一、基本情况攀钢提钒炼钢厂的两座1300t混铁炉,经过十多年的生产实践的检验证明,出铁口拱早期塌落的缺陷,是耐火内衬的砌体结构满足不了该炉的生产条件要求。改进前,1号混铁炉检修完后使用不到9个月,2号混铁炉使用不到7个月,都因为出铁口拱塌落导致混铁炉主拱的破坏而被迫停产进行检修。 First, the basic situation Panzhihua Iron and Steel Company to raise two 1300t mixed iron furnace, after more than 10 years of production practice proved that taphole arch collapse of the early defects, refractory lined masonry can not meet the structure The furnace production conditions. Before the improvement, the No. 1 mixer used less than 9 months after its overhaul, and the No. 2 mixer used less than 7 months, all of them were forced to stop production because the taphole of the taphole collapsed and caused the destruction of the main arch of the mixer. Overhaul