公开(公告)号：US20220324017A1

公开(公告)日：2022-10-13

申请号：US17639848

申请日：2020-09-17

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Takuya OKADA ,  Toshio KAKU ,  Hiroki FURUKAWA

IPC: B22D41/58 ,  B22D41/16 ,  B22D11/11 ,  B22D1/00

Abstract: A tundish upper nozzle structure and a continuous casting method make it possible to cause inclusions to float within a tundish. A flange-shaped member having an outside dimension greater than that of an upper end of a tundish upper nozzle is provided along a part or the entirety of the circumference of the upper end of the tundish upper nozzle, and one or more gas discharge holes are provided in one or more of the following surfaces: a lower surface, an outer peripheral surface and a top surface of the flange-shaped member, and a region of an outer peripheral surface of the tundish upper nozzle below the flange-shaped member. A length in the tundish upper nozzle structure is adjusted to cause almost all gas to float upwardly, or to adjust the flow rate of gas flowing downwardly toward the inner bore of the tundish upper nozzle, and the flow rate of gas floating upwardly.

公开(公告)号：US20190030599A1

公开(公告)日：2019-01-31

申请号：US16070934

申请日：2016-11-09

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Takahiro KURODA ,  Takashi SADANO ,  Takuya OKADA ,  Arito MIZOBE

IPC: B22D41/50 ,  B22D11/10

Abstract: A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.

公开(公告)号：US20220062984A1

公开(公告)日：2022-03-03

申请号：US17417461

申请日：2019-12-18

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Toshio KAKU ,  Hiroki FURUKAWA ,  Takuya OKADA

IPC: B22D41/18 ,  B22D11/18

Abstract: The precision of grasping or controlling backpressure around a gas discharge portion in a stopper for continuous casting can be improved with a stopper for continuous casting which includes a cavity for conveying gas in a vertical direction center of the stopper, one or a plurality of gas discharge holes passing through from the cavity to the outside in a distal center or a side surface of a reduced-diameter region including a fitted portion to a lower nozzle, and a pressure control component in a part of an area above the gas discharge hole within the cavity.

公开(公告)号：US20170014897A1

公开(公告)日：2017-01-19

申请号：US15121180

申请日：2015-02-05

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Takuya OKADA ,  Takahiro KURODA

IPC: B22D11/103 ,  B22D41/56 ,  B22D41/50

CPC classification number: B22D11/103 ,  B22D11/10 ,  B22D41/50 ,  B22D41/502 ,  B22D41/56

Abstract: An immersion nozzle for use with an immersion nozzle replacement apparatus, capable of preventing crack formation due to the presence of a neck region. The immersion nozzle includes a nozzle body, a flange, and a metal casing. The nozzle body is formed such that a region of an outer peripheral surface thereof located above a point of power of an upward supporting force from a supporting device extends vertically up to an upper edge of the nozzle body without any dimensional change with respect to an central axis of an inner bore of the nozzle body. The outer peripheral surface region is not joined to the metal casing.

Abstract translation: 一种用于浸入式喷嘴更换装置的浸入式喷嘴，能够防止由于存在颈部区域而形成的裂缝。 浸入式喷嘴包括喷嘴体，凸缘和金属壳体。 喷嘴体形成为使得其外周面的位于来自支撑装置的向上支撑力的上方的区域的区域垂直向上延伸到喷嘴体的上边缘，而相对于中心部没有任何尺寸变化 喷嘴体的内孔的轴线。 外周面区域不与金属壳体接合。

公开(公告)号：US20190070661A1

公开(公告)日：2019-03-07

申请号：US16077587

申请日：2017-02-07

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Takahiro KURODA ,  Tatsuya OOUCHI ,  Takuya OKADA ,  Akira OOTSUKA

IPC: B22D41/56 ,  B22D41/50 ,  B22D11/10

Abstract: In the method for replacing an immersion nozzle while pushing out a used immersion nozzle by a new immersion nozzle, in order to minimize leakage of molten steel during the replacement, to enable the use of a shaped joint sealer in a joint interface, and to ensure high sealability, a concave portion is formed on the new immersion nozzle's upper plane so as to include a nozzle hole, and the shaped joint sealer is mounted in this concave portion. The immersion nozzle's upper plane is caused to slide while being pressed to the upper nozzle's lower plane.