公开(公告)号：US20210001398A1

公开(公告)日：2021-01-07

申请号：US16978270

申请日：2019-02-13

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Kouji KAWARADA ,  Kouichi TACHIKAWA

IPC: B22D41/56

Abstract: Provided is a sealing block installation structure capable of preventing the occurrence of a gap between a nozzle or plug installed in a bottom portion of a molten metal vessel and a plate or the like located on the lower side of the nozzle or plug, and a gap between the nozzle or plug and a sealing block located on the upper side of or on the outer peripheral side of the nozzle or plug. In the seating block installation structure, a seating block 2 disposed to surround a nozzle for discharging therethrough molten metal downwardly from the bottom portion of the molten metal vessel or a plug is fixed to a shell of the bottom portion of the molten metal vessel by a connecting member 3.

公开(公告)号：US20230035070A1

公开(公告)日：2023-02-02

申请号：US17791425

申请日：2021-01-05

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Kenichi OKI ,  Kouichi TACHIKAWA

IPC: B22D41/58

Abstract: A bubbling plate for a sliding nozzle includes a plate body defining an inner hole therein and a gas-permeable ring installed inside the plate body to define part of the inner hole. The ring has a lower end surface formed with a stepped part, a convex part or a concave part; and the plate body has an upper surface in contact with the lower end surface with the upper surface formed with a stepped part, a concave part or a convex part capable of being opposed to and fittingly engaged with a corresponding part of the ring. The area in which the part of the ring is fittingly engaged with the corresponding part of the plate body has a length of 2 mm or more along a direction of a central axis of the inner hole, and mortar is interveningly provided in at least a longitudinally-extending joint part in the fitting engagement area.

公开(公告)号：US20230032307A1

公开(公告)日：2023-02-02

申请号：US17965000

申请日：2022-10-13

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Kouji KAWARADA ,  Kouichi TACHIKAWA

IPC: B22D41/56

Abstract: Provided is a seating block installation structure capable of preventing the occurrence of a gap between a nozzle or plug installed in a bottom portion of a molten metal vessel and a plate or the like located on the lower side of the nozzle or plug, and a gap between the nozzle or plug and a seating block located on the upper side of or on the outer peripheral side of the nozzle or plug. In the seating block installation structure, a seating block disposed to surround a nozzle for discharging therethrough molten metal downwardly from the bottom portion of the molten metal vessel or a plug is fixed to a shell of the bottom portion of the molten metal vessel by a connecting member.

公开(公告)号：US20220111436A1

公开(公告)日：2022-04-14

申请号：US17431214

申请日：2020-03-04

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Kouichi TACHIKAWA ,  Toshio KAKU

IPC: B22D41/58 ,  B22D41/16

Abstract: Provided is a nozzle or a stopper having a gas blowing function, which is capable of preventing irregular breaking to be triggered by a gas outlet or a gas passage path communicated with the gas outlet, or, even in the event of breaking, preventing expansion of the breaking, and a combination of the nozzle and the stopper. The nozzle comprises: a fitting engagement region refractory material layer composed of a fitting engagement region refractory material; a nozzle body composed of a different refractory material from the fitting engagement region refractory material (main body refractory material); and a gas outlet provided in at least one boundary area between the fitting engagement region refractory material layer and the main body refractory material in a surface of the nozzle contactable with molten steel.