Development of production of chamotte block components for glass making furnaces

Abstract

In the OAO Borovich Refractory Combine there is a working structure for developing output of chamotte block components of the lower structure of glass melting furnaces. Features are considered for the production technology of components and engineering lines, modernization of equipment, and the provision of product quality. Physicochemical properties are given for component grades ShSU-33 and MLS-62, and their advantages over similar products of other producers are indicated.Block components are used traditionally for lining the bottom of the melting bath of glass-making furnaces [1]. Before the start of using melting and casting baddeleyitecorundum components, large aluminosilicate components due to their considerable size and minimum number of joints have provided the required engineering life of a furnace bath, and subsequently structural stability of the lower structure of a furnace and the required heat insulation. Recent attempts to replace fired chamotte components by concrete, are not promising. Unfired low-cement concrete components require "a smooth heating-up campaign to the operating temperature" [2], as a result of which on heating they experience a continuous series of chemical and phase transformations: cement dehydration, formation of calcium aluminates, their reaction with aluminosilicate components of the matrix, in the course of which article stresses accumulate with a capacity to lead to breakdown. All of the concrete objects (fired and unfired) contain calcium aluminate, less chemically resistant to silicate glass, particularly at high temperature.

Development of effective refractories for metallurgy and the glass industry

“…Over the past five years bowl-shaped checkerwork for regenerators and articles made of low-cement concretes and modular articles for the brickwork of the bottom of tank furnaces have been developed [8,9].…”