本钢五号高炉是1981年9月大修后投产的。在1983年4月5日进行休风检查,发现钟面上有多处凹坑,其中大的有4个,尺寸约为φ400～500毫米,深为10～25毫米,分布在钟梁两侧。这些凹坑尚未穿透,采取补焊填平。同年6月30日炉顶严重喷料,高炉休风检查处理(花费10小时),发现接触面以上 Bengang No. 5 blast furnace was put into operation in September 1981 overhaul. On April 5, 1983, the wind off examination was carried out and found to have many pits on the clock face, of which four were large, with a size of about φ400 to 500 mm and a depth of 10 to 25 mm, distributed on both sides of the bell beam . These pits have not yet penetrated and are repaired by welding. June 30 the same year, the roof of a serious blasting blast blast off treatment (spent 10 hours), found above the contact surface