Abstract：It was generally acknowledged that the area of lower shaft, belly and bosh of blast furnace was a weak link of the whole structure. With the application of copper stave, this problem has been solved. Meanwhile, the BF life has been prolonged significantly. However, because of the slag skull being removed from copper stave hot surface, phenomena of naked on copper stave hot surface happened occasionally which resulted in copper stave being damaged extensively and had serious influence on production. The damage condition was described. By means of metallography, SEM and EDS, chemical analysis, a sampling study has been made on damage copper cooling stave of blast furnace. The results show that, the damage of copper stave is caused by hydrogen embrittlement which is due to higher oxygen content of copper stave scoured by high temperature gas current. Also, several suggestions on preventing the damage of copper stave has proposed.
2014, Vol. 49 
