Shinagawa Refractories Co., Ltd.

Shinagawa Shirorenga Kabushiki Kaisha

Tadao Taniguchi

Kenji Yamamoto

Mototsugu Osada

Yoshifumi Shigeta

Takashi Otsuka

Ryoichi Yoshino

Masahiko Nose

Shigeru Ando

Noritaka Hashimoto

Submerged nozzle replacing device

A submerged nozzle change device has a slide valve unit 3 which is provided in a molten-metal outlet formed in a lower portion of a molten-metal containing vessel 1 for controlling the outflow of a molten metal. A pair of guide rails 26 for slidably suspending and supporting a holding case 6 mounted on an upper end of a submerged nozzle 5 are swingably supported on the slide valve unit 3 so that one end of each of the guide rails can be pivotally moved upwards and downwards about a shaft 21 while being biased upwards. On the free ends of the guide rails 24, there is provided a pushing cylinder 30 for pushing a new submerged nozzle 51 set on the guide rails 26 to push an old submerged nozzle 52 to the opposite side. A pair of guide rollers 35, which are moved by a piston rod 30a of the pushing cylinder 30, are brought into contact with the upper surfaces of the guide rails 26 to hold the guide rails 26 horizontally until a nozzle hole 52b of the old submerged nozzle 52 is out of register with a nozzle hole 11a of the slide valve unit 3 to close the nozzle hole 11a of the slide valve unit 3. An inclined cam 27 is provided for moving the guide rails 26 downwards until the new submerged nozzle 51 reaches the lower surface of the slide valve unit 3 after the nozzle hole 11a is closed. Thus, it is possible to provide a submerged nozzle change device which can quickly change a submerged nozzle and which can prevent the contact surface of a submerged nozzle from being scratched when a new submerged nozzle is caused to slide to move to a predetermined position.

Submerged nozzle change device

A method of joining an immersion nozzle to a refractory member is disclosed, wherein a sealing-agent layer is formed on the upper joining surface of the immersion nozzle, and an exfoliating-agent layer is formed on the lower joining surface of the refractory member.

Method for joining immersion nozzle

Submerged nozzle changing apparatus

This invention relates to an inert gas injecting plate brick or nozzle brick for use in a sliding gate valve apparatus of molten metal, characterised in that said plate brick or insert nozzle brick is horizontally split into at least two parts, and a number of small diameter pipes are sealingly arranged and secured in said split surfaces. According to such a plate brick or nozzle brick, it is possible to prevent leakage of injection gas in such kind of apparatus, it is possible to carry out a stable casting working, and complicated, high cost, additional processes such as cutting working, boring working and connecting working of said bricks can be saved.

Inert gas injecting plate brick or insert nozzle brick for use in a

Discharge regulator of molten metal

This invention concerns an apparatus for enabling exchange of an immersion nozzle seated in a tundish and used for casting of a molten metal from a molten metal container to be carried out very easily and quickly, which apparatus comprises rails (4) laid so as to approximate closely to a molten metal casting outlet nozzle (2) of a molten metal container (1), a self-propelling truck (5) adapted to travel on the rails (4), retainer parts (7) mounted on the truck (5) and adapted to retain an immersion nozzle (3) at the leading terminal thereof, and a movable arm (6) provided with a cleaning device (18) for cleaning the lower terminal surface of the outlet nozzle (2) after removal of a used immersion nozzle.

Immersion nozzle exchanging apparatus

A clamping and fixing apparatus of a refractory-made plate 7 for a slide gate valve for controlling a molten steel flow comprising:

Growing community of inventors

Bizen, Japan

Tadao Taniguchi