| 摘要 |
PURPOSE:To improve quality and yield of a cast slab by arranging plural traversing weirs alternately projecting from both side walls at interval between flow-in and discharging positions of the molten steel in a tundish. CONSTITUTION:At the interval between the fitting positions of a long nozzle 2 and submerged nozzle 3 in the tundish 1, the traversing weirs 6 projecting toward the facing side walls from both side walls 4 are arranged. Then, length X of the traversing weirs 6 is shorter than the width (b) of the tundish and set at about 0.25-0.9 times, and height thereof is higher than the ordinary molten surface level 7. By this method, in the tundish 1, detour flow 14 of the molten steel is developed, and float-up and removal of inclusion are promoted by preventing increase of retaining time and short pass based on reducing stagnant molten steel. Therefore, cleanliness of the molten steel is improved and the quality and yield of the cast slab are improved.
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