To the steel used in furnace mantle of blast furnace and complement hot-blast furnace,against the request of bearing thermal fatigue and pressure under the condition of service, with the compiling of Chinese Standard Technical Specification for Smelting Processing Blast of Iron and Steel Enterprise, the thermal fatigue and strain-aging property of steel Q345-(B,C,GJC) and Q390-(GJC,D)are studied.

Updated technology on fabrication of Baosteel 250t converter shell;

As soon as the thicknesss of the asbestos board increases to 30 min the temperature field and stress field distribution conditions will be greatly improved and the creep deformation rate of the converter shell reduced correspondi.

This paper carried on converter shell ( shaft section ) temperature field analysing to 50 t's converter in Chongqing Iron & Steel Co.

Welding the tuyere cooler holder to the furnace shell for the 2500 m~3 blast furnace at SISG;

Pointing to characteristics that the erect joint of the furnace shell should be welded vertically and the steel plate is thick, the process of electro slag welding with consumable nozzle is adopted to ensure welding quality.