| 摘要 |
PURPOSE:To prevent the deterioration in the quality of a continuous casting product in the first use of a tundish and to improve the yield thereof by pouring a limited amt. of a molten flux which consists of a limited compsn. and is overheated into the tundish just prior to first pouring of a molten steel into the tundish. CONSTITUTION:The molten flux of which the essential compsn. consists, by weight, of 20%<=CaO<=40%, 20%<=SiO2<=60%, 5%<=AlO3<=40%, 5%<=CaF2<=20% is perliminarily overheated to <=1700 deg.C. Such molten flux is poured into the tundish at >=2 kg and <=10 kg for each 1 ton of the molten steel stagnating in the stationary state in the tundish just prior to the first pouring of the molten metal into the tundish to be used in continuous casting by which the production of a clean ingot is made possible. |
