Patent ID: 9027802
Filing Date: 2015-05-12
Classification: B22D

Abstract:
1. A refractory unit for a sliding gate at a spout of a container receivable of metal melt, the container including a base plate in which the spout is defined, the refractory unit comprising: a refractory adapter block adapted to be placed on the container spout and having an opening, said adapter block having a lower surface, a first refractory bottom plate having an upper surface in contact with the lower surface of the adapter block, the first bottom plate having an opening aligning with the opening in the adapter block when the first bottom plate is in an operating position, the first bottom plate being movable relative to the adapter block while the upper surface of the first bottom plate is in contact with the lower surface of the adapter block, a slidable refractory sliding plate that is pressed against the first bottom plate when in the operating position, the sliding plate having an opening and being movable between a first position in which the opening of the sliding plate aligns with the openings in the first bottom plate when in the operating position and the adapter block to provide the sliding gate with an open condition and a second position in which the opening of the sliding plate does not align with the opening in the first bottom plate when in the operating position to provide the sliding gate with a closed condition, the sliding plate having an upper surface in contact with a lower surface of the first bottom plate when in the operating position, and a second refractory bottom plate adjoining the adapter block, the second bottom plate being movable from a non-operating position alongside the first bottom plate to the operating position under the adapter block to replace the first bottom plate, the adapter block having a length in the direction of the second bottom plate such that an upper surface of the second bottom plate is in contact with the lower surface of the adapter block while the second bottom plate is in the non-operating position and at the same time that the upper surface of the first bottom plate is in contact with the lower surface of the adapter block while the first bottom plate is in the operating position.