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: An opening element for an insert nozzle of a slide gate valve apparatus, wherein a dead weight having an outside diameter smaller than the inside diameter of the melt passage opening of the slide gate valve apparatus is connected to a refractory cap by means of a steel wire, or by a refractory or metallic coupling rod and a method of opening said slide gate valve apparatus wherein said opening element is set in said respective passage openings of the insert nozzle and of a bottom plate connected to the nozzle, and said opening element is opened by the impact load exerted when said dead weight falls down due to the opening of the slide gate valve apparatus.

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.