Method and system for heat recovery in an oxy-fuel fired glass furnace

A method for producing glass comprising:

• feeding fuel and oxidant to burners of a furnace to combust the fuel to heat glass making material for making glass such that:
• (i) at least one burner in at least one upstream zone of the furnace operates in a mode of operation in which an inner flow of fuel and an inner flow of oxidant are output into the furnace between an upper oxidant conduit and a lower oxidant conduit such that a flame is formed to project into a combustion chamber of the furnace without upper oxidant staging via the upper oxidant conduit and without lower oxidant staging via the lower oxidant conduit while the oxidant is below a pre-selected hot oxidant temperature threshold;
• and
• (ii) at least one burner in at least one downstream zone of the furnace that is downstream of the at least one upstream zone of the furnace is operated in a foam control mode of operation in which an upper oxidant flow is passed out of an upper oxidant conduit of the burner along with an inner flow of fuel and an inner flow of oxidant that are output into the furnace so that combustion of the fuel from the at least one burner in the at least one downstream zone of the furnace forms a flame that extends upwardly to provide a reducing atmosphere adjacent the glass making material in the at least one downstream zone of furnace to dissolve foam back into the glass making material while the oxidant is below the pre-selected hot oxidant temperature threshold.