| 摘要 |
PROBLEM TO BE SOLVED: To provide a long nozzle used for continuous casting and a continuous casting method using this nozzle with which this long nozzle can repeatedly be used by restraining the sticking of solidified steel and inclusions and the quality of a cast slab is improved without generating the contamination of molten steel caused by the simplification of work and washing with oxygen, and a refractory cost can be reduced. SOLUTION: In the long nozzle 10 used for pouring the molten steel 13, 23 into a tundish 12 from ladles 11, 22, in at least a part of the contacting surface 18 with the molten steel at the inside of the long nozzle main body 16, a refractory 20 containing≥10 mass% dolomite clinker, is lined. The continuous casting method using this long nozzle 10 is performed as the followings, with which the long nozzle 10 is fitted to the ladle 11, and after pouring the molten steel 13 into the tundish 12, the long nozzle 10 is taken out from the ladle 11 and fitted to the other ladle 22 without washing the long nozzle 10 and further, the molten steel 23 is poured. COPYRIGHT: (C)2005,JPO&NCIPI
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