| OCR Text |
Show reduces energy consumption but also improves the heating performance compared to the conventional burner. Temperature distribution inside the ladle W e placed a total of 12 thermocouples inside the ladle (four circumferential positions at depths of 50 m m , 1,000 mm, and 2,000 m m from the ladle bottom), and measured the atmospheric temperature at each point near the inner wall in order to compare the conventional burner heating system and the regenerative burner heating system. Temperature measurement points are shown in Fig. 5. (1) Circumferential temperature distribution Figure 6 shows an example of the atmospheric temperature distribution inside the ladle in the circumferential direction after the control temperature has reached the target temperature and the inside of the ladle has been heated uniformly. Because the conventional burner is placed off-center, the temperature is highest near the burner. This phenomenon becomes less marked the further the measurement points are from the burner, that is, the nearer they are to the bottom of the ladle. The temperature variation ranges from 20K to 50K. On the other hand, the variation in circumferential temperature with the regenerative burner ranges from 10K to 15K, which is less than half that with the conventional burner. It is therefore clear that the alternate combustion method is effective for homogenizing the temperature inside the ladle. (2) Vertical temperature distribution The vertical temperature distribution for two circumferential measurement points where the variation in temperature was particularly large is shown in Fig. 7. When the conventional burner is used, the temperature reaches a maximum at 1,000 m m from the ladle bottom. The temperature variation in the region up to 1,000 m m from the ladle bottom is about 60K. On the other hand, when the regenerative burner is used, the temperature increases as the distance from the measurement point to the ladle bottom decreases, and the variation in temperature from the middle section to the 6 |
