Abstract: A submerged nozzle replacing device comprises a slide valve device 6 for controlling the amount of outflow of molten metal flowing out of a molten metal container, a holding cylinder 21 for a submerged nozzle 9 supported in a vertical posture below the slide valve device, and a guide bar 33 having a pair of parallely provided rail members 33a supported in a horizontal posture by a piston rod of the cylinder, and fitted onto a nozzle case 10 at the upper end of the submerged nozzle 9 to hold the nozzle case 10, wherein a guide 32 extending beyond the region of a mold 12 is provided on one side of the slide valve device 6, and a jig holding member 52 for detachably holding a submerged nozzle holding jig 57 is mounted movably on a rail 51 running in the longitudinal direction of the guide 32.

Abstract: 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.

Abstract: 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.

Abstract: A submerged nozzle changing apparatus comprises: a slide valve device (32) for controlling the rate of discharge of a molten metal from a molten metal container (30) a nozzle holding cylinder actuator (42) supported in a vertical position under the slide valve device; and a guide arm unit (44) supported on the piston rod (43) of the nozzle holding cylinder actuator in a horizontal position. The guide arm unit (44) has a pair of parallel guide rails (45) provided in their inner surfaces facing each other with guide grooves (46) having open opposite ends and a length long enough to hold at least three nozzle cases (48) fitted on the upper parts of submerged nozzles (47). A new submerged nozzle is supported on the guide arm unit with portions of a nozzle case fitted on the upper part thereof engaged in the guide grooves of the pair of guide rails and is moved to a nozzle setting position by a nozzle changing cylinder actuator (56).

Abstract: 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.

Abstract: The present invention relates to a discharge regulator of molten metal, which can be disposed approximately vertically at the bottom portion of a molten metal vessel, characterized in that the regulator consists of a rotary nozzle, a nozzle carrying brick and a sleeve or of a rotary nozzle and a nozzle carrying brick, two or more recessed notches or openings are provided in at least either one of said nozzle carrying brick and said sleeve, the surface of said nozzle opening of the rotary nozzle, which pierces through at least one nozzle hole, is supported slidably to and in close contact with the inner peripheral surface of said nozzle carrying brick or said sleeve, and said rotary nozzle is equipped with a rotary mechanism mounted in such a manner that the upper portion of said rotary nozzle is brought into contact with the molten metal.

Abstract: 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.

Abstract: A clamping and fixing apparatus of a refractory-made plate 7 for a slide gate valve for controlling a molten steel flow comprising:providing plate-clamping fixtures 12, 12 rotatably in its plane direction and in contact with the inner side of a casing 13 and a guide piece 11, at both the ends at the plate side, of the guide piece 11 being supported by at least one guide 16 provided within the longer edge sides of the casing 13 which houses the refractory-made plate 7;inserting idly a nut 10 into a dovetail groove recess 11a provided in the other area of said guide piece 11;mounting to said nut 10 a bolt 9 which is rotatable passing through said casing 13; andproviding said fixtures 12, 12 with respective surfaces of contacting the plate 7.