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METHOD FOR CONTROLLING SEPARATING POINT IN CAST BILLET IN TWIN DIRECTIONAL DRAWING TYPE HORIZONTAL CONTINUOUS CASTING
METHOD FOR CONTROLLING SEPARATING POINT IN CAST BILLET IN TWIN DIRECTIONAL DRAWING TYPE HORIZONTAL CONTINUOUS CASTING
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机译：双方向抽拉式水平连铸坯铸坯分离点的控制方法
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摘要
PURPOSE:To stabilize separating point of solidified shell in a cast billet and to maintain the above point at the fixed position near just below a feed nozzle by arranging spray cooling type nozzles at circumference of outer wall at center part of the mold, penetrating outer wall of the mold, slowly cooling mold copper plate at center part and forcedly cooling in accordance with apart from the center part. CONSTITUTION:In the inner part of the mold 6 at near just below the feed nozzle 8, the mold copper plate 6A is arranged and the inner part thereof is brought into contact with the molten steel 2 poured from the feed nozzle 8, and in the outside of the mold 6, the mold outer wall 6B consisting of iron shell is arranged. The plural atomizing nozzles 20 for cooling are fitted to upper and rear faces and both side faces of the outer wall 6B at center part of the mold. Each of the nozzle 20 for cooling provides a cooling water flow rate control valve 24 and a compressed air flow rate control valve 28, and the spraying flow rate can be independently controlled to each other. By this method, the separating point of the solidified shell in the cast billet is maintained to the fixed position and stable operation can be executed without any accident of breakout, etc., in the horizontal continuous casting.
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