SHUTTER PLATE IN A VALVE BUTTERFLY, AND ALSO A VALVE BUTTERFLY IN A DRAIN HOLE OF A BUCKET FOR A MELTED METAL

摘要

1. A shutter plate for a slide gate on a drain hole of a molten metal ladle, in particular a converter with an elongated refractory plate (11) and a metal casing (12) surrounding it, and the refractory plate (11) with sliding surface (14, 15) is pulled off the same or with a different refractory shutter plate or with a sliding surface (21 ') of the refractory head part (21), characterized in that the refractory plate (11) at least along the side (16, 17, 18, 19) bounding sliding surface (14, 15), has a bevel (26, 28, 29), forming with NOSTA (14, 15) sliding angle (α) and relating to a portion of the refractory plate (11) extending from the metallic shell (12). ! 2. The shutter plate according to claim 1, characterized in that the angle (α) of this bevel (26, 28, 29) is 10-15 °. ! 3. The shutter plate according to claim 1 or 2, characterized in that the bevel (26) refers to the narrow side (16) of the refractory plate (11) directed across the longitudinal axis (L) of the plates. ! 4. The shutter plate according to claim 1, characterized in that the bevel (28, 29) refers to at least one, preferably both longitudinal sides (18, 19) extending parallel to the longitudinal axis (L) of the plates. ! 5. Gate valve on the drain hole of the ladle for molten metal, in particular a converter with a shutter plate (10) according to one of claims 1 to 4, characterized in that the shutter plate (10) as a stationary hearth plate is placed in the frame (30) a housing mounted on a fixed foundation plate (32) of the bucket, and in which the slide block (31) is provided with a possibility of movement, provided with a slide plate (20), and the longitudinal axis (L) of the plates extends in the direction of movement of the slide block (31), shutter plate (10) in the sliding block or its refractory