PROCEDE DE CHAUFFAGE DE LA CHARGE D'UN FOUR DE VERRE

摘要

Heating a glass furnace batch involves: (a) positioning one or more assemblies of first and second burners, supplied with fuel gas and an oxidiser gas containing at least one 50 vol.% oxygen, spaced apart by not more than 3 m in one of the furnace walls; (b) positioning an oxygen lance between the first and second burners to form a combustion assembly; and (c) supplying 30-80 (preferably 30-70) vol.% of the oxidiser gas to the lance and 20-70 vol.% (preferably the remainder) of the oxidiser gas in similar amounts to the first and second burners, to retard combustion and to increase the flame length compared with that obtained without injection of oxidiser gas in the lance.