Patent ID: 7703644

Claim:
A process for manufacturing a sliding plate for a sliding valve of a metallurgical melting vessel comprising: a) forming the sliding plate by integrating in a pressing procedure with a press, a pre-pressed annular insert made of a refractory ceramic material in a base body made of a refractory ceramic material, such that the insert surrounds at least one passage opening of the base body at least in an area of one main surface of the base body completely and is aligned with this main surface, wherein the at least one passage opening extends between main surfaces of the base body, and removing the sliding plate from the press, now providing an annular gap between a circumferential surface of the insert and a corresponding surface of the base body, b) subsequent to (a), impregnating a transition area including the said annular gap between the insert and the base body with an impregnation agent, and c) subsequent to (b), tempering the plate at temperatures between 200° C. and 700° C. to cause the impregnation agent to create a non-positive direct connection between the base body and the insert.