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 thereof, 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, a 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 an inclination of the runner 17 defined by a formula of {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. In a planar view of the tundish 13, shortest distances d1 and d2 between a center position P of a long nozzle 12 for injecting molten metal from a ladle 11 into the molten metal receiving chamber 15 and virtual lines L1 and L2 of center axes of the runner passing through the respective center positions C1 and C2 of the runner 17 are set to be twice or more of an outer diameter D of the long nozzle 12.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、タンディッシュ１３を平面視して、取鍋１１から受湯室１５に溶湯を注入するためのロングノズル１２の中心位置Ｐと、湯道１７の各中心位置Ｃ１、Ｃ２を通る湯道中心軸仮想線Ｌ１、Ｌ２との最短距離ｄ１、ｄ２を、ロングノズル１２の外径Ｄの２倍以上にする。【選択図】図１