CONTINUOUS CASTING PROCESS

• Main Authors: MIYAMOTO KENICHIRO, WATANABE EIJI, FUCHIGAMI KATSUHIRO, OHARA NAOYA
• Format: Patent
• Language: English; Japanese
• Published: 12.02.2021
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

To provide a continuous casting process that enables molten metal to be further highly cleaned.SOLUTION: A tundish 13 has a weir 18 which partitions the inside of the tundish 13 into a molten metal receiving chamber 15 and a molten metal tapping chamber 16 and which comprises at a lower portion, a runner 17 through which molten metal flows. When the shape of the cross section of the runner 17 is expressed in terms of a circle, the diameter of the circle is set to be 100-300 mm. The runner 17 is inclined downward from the molten metal receiving chamber 15 side to the molten metal tapping chamber 16 side, and the inclination of the runner 17 defined by {a difference in height between respective center positions C1 and C2 of an end face at the molten metal receiving chamber 15 side and an end face at the molten metal tapping chamber 16 side of the runner 17 (mm)}/{a horizontal length of the runner 17 (mm)} is set to be in the range of 0.5×10-2-9.5×10-2. A height Z from a bottom surface 19 of the molten metal tapping chamber 16 of a collision point C3 being a position at which a virtual line L of a center axis of the runner crosses a refractory wall surface of the molten metal tapping chamber 16 and an angle φ formed by a perpendicular line M of the refractory wall surface and the virtual line L of the center axis of the runner, at the collision point C3 satisfy an expressional relationship of 0.10≤0.5-φ/180-Z/1200≤0.30.SELECTED DRAWING: Figure 1 【課題】溶湯の更なる高清浄化が可能な連続鋳造方法を提供する。【解決手段】タンディッシュ１３は、その内部が受湯室１５と出湯室１６に区分され、溶湯が流れる湯道１７を下部に備えた堰１８を有し、湯道１７はその断面形状を円形に換算して直径を１００〜３００ｍｍに設定し、湯道１７を受湯室１５側から出湯室１６側へかけて下方に向けて傾斜させ、かつ、｛湯道１７の受湯室１５側端面と出湯室１６側端面の各中心位置Ｃ１、Ｃ２の高低差（ｍｍ）｝／｛湯道１７の水平方向の長さ（ｍｍ）｝で定義される湯道１７の傾きを０．５×１０−２〜９．５×１０−２の範囲にし、湯道中心軸仮想線Ｌが出湯室１６の耐火物壁面と交差する位置である衝突点Ｃ３の出湯室１６の底面１９からの高さＺと、衝突点Ｃ３における耐火物壁面の垂線Ｍと湯道中心軸仮想線Ｌがなす角φが、０．１０≦０．５−φ／１８０−Ｚ／１２００≦０．３０、を満たす。【選択図】図１