Abstract: A rigid carbon steel band may be used in a stationary top plate for a sliding gate valve and in the manufacture thereof. The refractory material in a stationary top plate may be compressibly held by a steel band having sufficient rigidity and size to prevent cracking of the refractory material during handling and use, and having sufficient length to allow the band's distal ends to be welded end-to-end. The welded band may be heat processed to set the size of the band and maintain the desired amount of refractory compression. The thickness of the plate of refractory material may be the same adjacent the aperture for the teeming metal and at the periphery of the plate.

Abstract: A collector nozzle assembly for pouring molten metal is assembled from upper and lower nozzle portions to form a continuous nozzle. The abutting end surface of one nozzle portion is provided with a projection and the abutting end surface of the other nozzle portion is provided with a complementary groove with said projection received snugly by said groove and cemented thereinto. A metal housing is cemented around the exterior of said nozzle assembly with mortar which is heat set at a temperature no higher than 800.degree. F.