1,210,961. Glass melting furnaces. CORNING GLASS WORKS. 9 May, 1968 [9 March, 1967], No. 22008/68. Heading C1M. [Also in Division F4] A glass melting and refining furnace comprises a melting end 10, a refining end 12, a continuous throat 14 connecting the refining end with the melting end, glass batch feeders 18 in the melting end at a location remote from the throat and means 20, 24 for heating the melting end to melt the batch, the refining end 12 being circular in horizontal cross-section, having a domed roof and being separated from the melting end by the throat, the outside walls of which throat are at least partially in contact with the ambient atmosphere. The refining end is provided with pairs of burners 28, 30, 32 which can be used either to heat or to cool the glass in that end. It is preferred that only the burners 28, 30 be used for cooling. A control system 52-60 maintains the pressures within the melting and refining ends in constant relationship. The furnace has particular application in melting glasses which emit fumes highly corrosive to the refractories in that the separation of the melting and refining ends provides for better cooling of the furnace superstructure. The circular refining end reduces stagnation of glass.
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