Uss Engineers and Consultants, Inc.

Romano Cappelli

Procedure for rebuilding a movable plate in the pouring valve of a ladle, involving the complete reconstruction of the original nozzle, which has been removed, and of a flat portion, also removed, around the pouring hole, in a circular or rectangular area whose width is equal to at least the external diameter of the nozzle. The nozzle is reconstructed with a prefabricated piece of refractory material, or with fresh refractory material packed 'in situ', and may be of the same shape as the original nozzle, or of a different shape; the flat portion is reconstructed using a prefabricated refractory piece, or with fresh refractory material packed 'in situ'.

Procedure for rebuilding the movable plate in the pouring valve of a

Techniques are disclosed for renovating sliding gate valve plates or for adapting conventional plates for use with problem-beset metals. Stationary plates (1) have their orifices (2) bored out to downwardly-tapering form and correspondingly tapered prefabricated refractory insert rings (3) are then cemented in place, the rings having axial depths equal to the plate thicknesses. An orificed plate (7) furnished with an integral depending nozzle (12) has its flow passage (13) bored out such that an upper bore portion extending through the plate (7) and part way along the nozzle (12) is transversely larger than the following downstream bore portion. A prefabricated refractory insert ring (9) is cemented into the upper bore portion, ring (9) being substantially as deep axially as the said bore portion. The downstream bore portion is lined with cementitious, metal-reinforced material (14). Materials for the insert rings (3, 9) and cementitious lining (14) are chosen to suit the pouring conditions and metals to be poured.

Growing community of inventors

Milan, Italy

Romano Cappelli