| 摘要 |
PURPOSE:To prevent the rise of unit consumption of refractory and the deterioration of yield by using two tundishes having pool for remaining molten steel and alternately reusing two tundishes at the time of casting different kinds of steel. CONSTITUTION:The bottom part of the tundish 2 is the highest at the center part 12 and forms the pool 10 for remaining molten steel, which can store 10 tons of the remained steel, at the upper part of fitting part of an immersion nozzle 4. At the time of changing over sequentially continuous casting into the different kind of steel, after stopping the casting under condition of remaining 0.5-10t molten steel, a first tundish 2A is ascended to take off the immersion nozzle 4 and the remaining steel and remaining slag are removed while executing the electrode heating and this tundish is shifted to a waiting position 34A. After shifting to the waiting position 34A, the remaining steel and remained slag is continuously removed by heating of a gas burner 36 and after completing this operation, new immersion nozzle 4 is fitted to stand by. On the other hand, a second tundish 2B during standing by at waiting position 34B is shifted to the casting position and the casting by the different steel kind is reopened.
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