武钢炼铁厂自投产以来高炉砂口内衬一直是采用砂口泥,糊砂口要冒着高温浓烟的熏烤,劳动强度大,耗费时间长,以致往往不能正点出铁,影响高炉生产。有时因砂口未及烤干而出铁,曾造成砂口放炮和随之而来的烧穿渣罐,烧毁渣铁道等恶性事故。在正常情况下,砂口是四天一小修,七天一大修。大修一次砂口最多只能流经10000～15000吨铁水。 Since the steelmaking plant in WISCO has been producing blast furnace sand lining has been the use of sand mud mouth, paste mouth to take high-temperature smoke smoke roasted, labor-intensive, time-consuming and often can not punctuality, affecting blast furnace production . Sometimes due to the sand mouth and roasted and out of iron, had caused sand blasting and subsequent wear burn slag cans, burning slag railways and other serious accidents. Under normal circumstances, sand mouth is a minor repair four days, seven days a major repair. Overhaul a sand mouth can only flow through 10000 ~ 15000 tons of hot metal.