FOERFARANDE FOER FRAMSTAELLNING AV EN TILLSLUTNINGSSKIVENHET FOER FOERSKJUTNINGSTILLSLUTNING.

摘要

A refractory plate assembly for use in a sliding closure unit includes a plate-shaped refractory member having therethrough at least one discharge opening and a metal jacket surrounding the peripheral edge of the refractory member. Such assembly is constructed by providing the refractory member with at least one indentation extending inwardly from the peripheral edge of the refractory member. A metal ring is positioned to surround the peripheral edge of the refractory member such that a portion of the metal ring extends across the indentation. This portion of the metal ring is pressed into the indentation until an innermost external surface of such portion is spaced a predetermined distance from the external surface of the metal ring at a position at the peripheral edge of the refractory member opposite the indentation. This pressing involves permanently increasing the length of the metal ring by stressing the metal ring beyond the elastic limit thereof and thereby permanently deforming the metal ring into tight contact with the peripheral edge of the refractory member.