Chromic oxide blocks for use in the container glass industry

Abstract

Large parts of the tank superstructure of soda - lime - silica glass melters for the production of Hat and container glass are mostly lined with fused-cast AZS blocks today These linings are standind about 8 to 10 years. However, from pracdcal experience it is well-known that certain furnace areas such as doghouse corners, weirs, throat assemblies etc. are prone to progressive corrosion. In order to eliminate these shortcomings by providing cost-effective Solutions, isostatically pressed and sintered chromic oxide blocks were tested successfully for use in soda - lime - silica glass furnaces. Questions concerning the corrosion behaviour, the colouradon of the glass and the formation of Chromate are discussed.