8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

The damage of copper cooling stave in several china’s blast furnace is investigated. Furthermore, the damage mechanism has also been analyzed. It’s shows that the breakage of copper cooling stave mainly due to unstable slag skull and frequent wearing by furnace burden and gas flow, as well as improper design. Based on which some measures were suggested for prolonging the service life of copper cooling stave. Such as controlling the oxygen content of the copper cooling stave body, ensuring reliability of BF cooling system and maintaining appropriate peripheral gas flow. Most of all, the author believes that long service life of BF copper cooling stave can be achieved by appropriately controlling of peripheral gas flow intensity, protecting the slag skull from frequent peel-off and reducing the thermal shock. Additionally, the operation practice of No.1 BF of Shougang corporation proves that timely spray-lining is effective for handing damage copper stave, Its copper cooling stave life has been more than 13 years. At last, it is pointed out that appropriate use of copper cooling stave can effectively extend the service life of blast furnace.