Innovative Practice of Repair Technology for Movable Hood of Large-scale Converter
The"three hoods"of the converter are closest to the converter mouth,the production environment of the movable hood is harsh,and the outer wall of the tube is affected by the flue gas up to about 1 450 ℃.In addition,the tube is also affected by the erosion and wear of smoke,and the impact and covering of the splashing steel slag during the oxygen blowing of steel-making.The inner wall of the tube is subjected to the thermal stress of water vapor and the temperature difference stress of outer wall,coupled with the impact of the uneven heating of heating surface tube as well as the hydrodynamic force and deviation,thus leading to the shortening of the service life of the tube.By formulating the off-line repair standard for the movable section of vaporization flue,innovating the off-line repair technology of movable section and the heat treatment process technology of overall annealing,the cracking and deformation of the pipeline in the production process of large-scale converter vaporization flue are improved,the service life of the vaporization flue is effectively prolonged,and the operating cost of the equipment is reduced.
万方数据
维普
