Abstract: A plate brick assembly cartridge for a slide gate valve, in which metallic or ceramic holders are mounted to the outer peripheries of the sides of respective plates for the slide gate valve, and which is provided with an assembling mechanism for mutually engaging said holders, characterized in that both the faces of the holder for a slide plate are set slightly back from the sliding surface of said slide plate. The invention has any of the following constitutions. Voids for sensors for cold and/or temperature are provided in the holders, said voids communicating with one another. The sliding surfaces of the holders are provided with a ceramic coating. The plate brick for the slide gate valve is split. The contact faces of the holders with the plate bricks are made at angles of inclination. The surface pressure loading mechanism is of sliding, and opening and closing type, and provided with cylinders for surface pressure loading. All the above mechanisms are remote controlled.

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.

Abstract: A sector sliding plate brick having a plurality of discharge ports for use in a sliding nozzle apparatus for casting molten metal, characterized in that the plane configuration of said sliding plate brick forms a sector shape or a shape similar to sector, each center of the discharge ports of more than two pierced on said sector plane exists at point corresponding to a definite distance from the common center of an arc passing through the center of each discharge port, and the sliding plate brick can revolve on said common center as fulcrum.