| 摘要 |
PURPOSE:To anneal uniformly a converter body with a short time of treatment by penetrating a fuel supply piping into a trunnion shaft for tilting the converter, connecting the pipe to heating burners inserted into the furnace body and heating the body with the burners while rotating said body. CONSTITUTION:A piping 9 is penetrated through the center of a trunnion shaft 10 via a rotary joint 8 and is connected to plural nozzles 7 of heating burners provided in the furnace bottom so that gas or heavy oil can be supplied. A heat insulating cover 12 having a ventilation port 11 is attached in a furnace port 2 and the surface of a furnace body 1 is covered with a heat insulating material. While the body 1 is rotated in this state around the shaft 10, said body is heated and annealed by the burners. The residual stress accumulated in the body 1 is thus relieved. |
