公开(公告)号：US20250128989A1

公开(公告)日：2025-04-24

申请号：US18681171

申请日：2022-06-24

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Atsushi TOKUTOMI ,  Masanori KOGA ,  Yusuke KAWABE

IPC: C04B35/111 ,  C04B35/19 ,  C04B35/565 ,  C04B35/63

Abstract: The present invention provides a dry spraying material for a firing furnace, which is free from a need for a drying process after spraying, and capable of withstanding physical shock from furnace contents. The dry spraying material according to the present invention is designed for a firing furnace having a furnace wall temperature of 1400° C. or less, wherein a SiO2 component derived from raw materials having a particle size of less than 75 μm and an Al2O3 component derived from raw materials having a particle size of less than 75 μm are contained in the dry spraying material, respectively, in the dry spraying material in an amount of 1% by mass to 10% by mass and in an amount of 5% by mass to 40% by mass. Further, a basic compound fine powder of one or more types selected from the group consisting of magnesium oxide, magnesium carbonate, magnesium sulfate, magnesium nitrate, calcium oxide, calcium carbonate, calcium sulfate, and calcium nitrate each having a particle size of less than 75 μm is contained in a raw material mixture in a total amount of 0.1% by mass to 5% by mass. One or more types selected from alkali silicate and alkali phosphate are used as a binder, and the amount of usage of cement is limited to 5% by mass or less.

公开(公告)号：US20240116103A1

公开(公告)日：2024-04-11

申请号：US18275831

申请日：2022-01-28

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Toshihiro IMAHASE ,  Mamoru YOSHIMURA ,  Yusuke YAMAGUCHI ,  Yudai ONOUE

IPC: B22D46/00 ,  B22D41/34 ,  B22D41/38

CPC classification number: B22D46/00 ,  B22D41/34 ,  B22D41/38 ,  F27D3/14

Abstract: A mounting device capable of smoothly mounting a drive unit being in a hanging state to a sliding nozzle device, using a manipulator. The mounting device is mounted to a distal end of a manipulator to mount a drive unit whose upper end is connected to a suspending device, to a holder of a sliding nozzle device. The mounting device includes: a holding part for holding an upper portion or central portion (to-be-held plate) of the drive unit; and a contact part which is contactable with a lower portion (to-be-contacted part) of the drive unit when mounting the drive unit to the holder.

公开(公告)号：US11938534B2

公开(公告)日：2024-03-26

申请号：US17295190

申请日：2020-03-19

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Mamoru Yoshimura ,  Junichi Funato ,  Yusuke Yamaguchi ,  Toshihiro Imahase

IPC: B22D11/10 ,  B22D41/34 ,  B25J13/08

CPC classification number: B22D11/10 ,  B22D41/34 ,  B25J13/08

Abstract: An opening-closing apparatus capable of, when using a robot arm to selectively open and close a component of a sliding nozzle device, reliably opening and closing the component to respective given positions. The apparatus comprises: a hand-like distal module engageable with an openable-closable component of a sliding nozzle device; a force sensor to detect a force received by the module; and a robot arm to which the module and the sensor are mounted. The robot arm is controllably operated to: move the module toward the component of the sliding nozzle device and engage the module with the component of the sliding nozzle device; then move the module to move the component, if the absolute value of the force detected by the sensor is equal to or less than a given threshold; and stop the movement of the module, when the absolute value of the force detected by the sensor reaches the threshold.

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：US20220288675A1

公开(公告)日：2022-09-15

申请号：US17635095

申请日：2020-08-17

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Takeshi FUJIMOTO ,  Akira OTSUKA ,  Toshihiro IMAHASE

IPC: B22D41/34 ,  B22D11/10

Abstract: A sliding nozzle apparatus, configured to allow a drive unit to be attached to and detached from a slide metal frame, efficiently transmits a driving force of the drive unit to the slide metal frame. The sliding nozzle apparatus comprises a connection component attached to a slide metal frame and configured for connection with a drive unit. The connection component is provided with an opening with respect to which the drive unit can be attached and detached. The connection component is configured to allow the opening to be switched between a first position where the opening faces in the same direction as an opening-closing direction of the slide metal frame, and a second position where the opening faces in the same direction as an attaching-detaching direction of the drive unit.

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.

公开(公告)号：US11293696B2

公开(公告)日：2022-04-05

申请号：US15500417

申请日：2015-06-30

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Kazuhiro Honda

IPC: F27D1/16 ,  C23C4/10 ,  C22C1/05 ,  C04B35/66

Abstract: Provided is a thermal spray material capable of, when used in a thermal spray operation for repairing a furnace wall of an industrial furnace or for other purposes, maintaining good post-repetition bondability with respect to a target surface to thereby prevent peel-off of a resulting thermally sprayed deposit, and improving initial ignitability while suppressing dust-generating property. The thermal spray material comprised a basic compound comprising at least one of a Ca component and an Mg component, a metal Si powder, and a silica-based or alumina-silica based powder. A content rate of a fraction constituting the basic compound and having a particle size of 0.15 mm or less is 30 mass % or more with respect to 100 mass % of the basic compound, and a content rate of a fraction constituting the metal Si powder and having a particle size of 20 μm or less is from 10 mass % to 25 mass % with respect to 100 mass % of the thermal spray material. Further, (the content rate (mass %) of the fraction constituting the metal Si powder and having a particle size of 20 μm or less, with respect to 100 mass % of the thermal spray material)/(a content rate (mass %) of the fraction constituting the basic compound and having a particle size of 0.15 mm or less, with respect to 100 mass % of the thermal spray material) is from 0.8 to 10, and a content rate of a fraction constituting the metal Si powder and having a particle size of 10 μm or less is 60 mass % or more with respect to 100 mass % of the metal Si powder.

公开(公告)号：US20220016695A1

公开(公告)日：2022-01-20

申请号：US17295190

申请日：2020-03-19

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Mamoru YOSHIMURA ,  Junichi FUNATO ,  Yusuke YAMAGUCHI ,  Toshihiro IMAHASE

IPC: B22D11/10 ,  B22D41/34 ,  B25J13/08

Abstract: An opening-closing apparatus capable of, when using a robot arm to selectively open and close a component of a sliding nozzle device, reliably opening and closing the component to respective given positions. The apparatus comprises: a hand-like distal module engageable with an openable-closable component of a sliding nozzle device; a force sensor to detect a force received by the module; and a robot arm to which the module and the sensor are mounted. The robot arm is controllably operated to: move the module toward the component of the sliding nozzle device and engage the module with the component of the sliding nozzle device; then move the module to move the component, if the absolute value of the force detected by the sensor is equal to or less than a given threshold; and stop the movement of the module, when the absolute value of the force detected by the sensor reaches the threshold.

公开(公告)号：US10799942B2

公开(公告)日：2020-10-13

申请号：US15774319

申请日：2016-09-13

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi Fukunaga ,  Arito Mizobe ,  Kenichi Oki ,  Hiroki Furukawa

IPC: B22D41/08 ,  B22D11/06 ,  B22D11/103 ,  B22D41/50

Abstract: A flat immersion nozzle stabilizes the discharging flow of molten steel thereby stabilizing the molten steel surface in a mold, namely, decreasing the fluctuation thereof. In the immersion nozzle having a flat shape in which a width Wn of an inner hole is greater than a thickness Tn of the inner hole, a central protrusion portion (1) is disposed in a center section of a wall surface in a width direction of a flat section. Wp/Wn, a ratio of a length Wp of the central protrusion portion in the width direction to Wn, is 0.2 or more and 0.7 or less. The central protrusion portion (1) is disposed symmetrically as a pair; and a total length Tp in the thickness direction of the pair of the central protrusion portions is 0.15 or more and 0.75 or less of Tn.

公开(公告)号：US10562094B2

公开(公告)日：2020-02-18

申请号：US15878685

申请日：2018-01-24

Applicant: NISSHIN STEEL CO., LTD. ,  KROSAKIHARIMA CORPORATION

Inventor： Yutaka Hiraga

IPC: B22D11/18 ,  B22D11/118

Abstract: An annular weir is fixed at a bottom of a tundish and just under a long nozzle of a ladle in a continuous casting apparatus. The annular weir includes a cavity which has a substantially circular shaped transverse section. The cavity includes: an upper side opening configured to receive a stream of molten metal from an upper side through the long nozzle; an inner protrusion which is annular in shape and which extends toward an inner side from an upper end of an inner wall of the cavity; a first space on an inner side of the inner protrusion; and a second space which communicates with the first space 13a and which is on a lower side of the first space.