一、前言由于高炉大型化,高温送风,高压操作,引起铁水温度提高,渣铁量增大,出铁次数增加,出铁时间延长,铁水流速提高,使出铁沟在高温渣铁的机械冲刷和化学侵蚀等作用下,损害的更加严重,突出表现为磨蚀和龟裂,造成炉前工人劳动强 I. INTRODUCTION Due to the large size of blast furnace, high temperature air supply and high pressure operation, the temperature of molten iron is increased, the amount of slag iron is increased, the number of tapping is increased, the tapping time is prolonged, the molten iron flow rate is increased, Erosion and chemical erosion and other effects, the more serious damage, highlighting the erosion and cracking, resulting in labor-intensive workers in front of the stove