Abstract: The invention relates to a method for combusting a fuel gas with an oxidant by using a burner assembly (10) comprising a burner (12) and a lance (14), the method comprising providing via the burner (12) a main gas flow to a combustion, wherein the main gas flow comprises a main part of the fuel gas and a first part of the oxidant. Further, the method comprises providing via the lance (14) a staging gas flow to the combustion, wherein the staging gas flow comprises a second part of the oxidant and an auxiliary part of the fuel gas. The main part of the fuel gas is larger than the auxiliary part of the fuel gas. Furthermore, the invention relates to a burner assembly (10) and a furnace comprising such.

Abstract: A method and a device are provided for melting meltable stock, such as glass, wherein a melting furnace is heated via a burner flame generated by means of a burner port, to which fuel and oxidizer are supplied, a fuel-rich fuel-oxygen mixture being introduced into the furnace downstream from the burner port via at least one substoichiometrically operated burner and/or a fuel or fuel mixture being introduced into the furnace downstream from the burner arrangement via at least one fuel nozzle, and a gas stream containing oxygen being introduced into the furnace downstream from the at least one substoichiometrically operated burner and/or the at least one fuel nozzle.

Abstract: A method for melting meltable stock, such as glass includes a melting furnace (10) heated via a burner flame (25,29) generated by a burner port, through which fuel and oxidizer are supplied, a fuel-rich gas stream introduced into the furnace downstream from the burner port via at least one substoichiometrically operated burner (20,22) and/or a fuel or fuel mixture being introduced into the furnace downstream from the burner arrangement via at least one fuel nozzle, and a oxygen containing gas stream being introduced into the furnace downstream from the at least one substoichiometrically operated burner and/or the at least one fuel nozzle. A furnace device is also provided.

Abstract: A method and apparatus are provided to flame polish a thin glass sheet which includes cooling the thin glass sheet followed by heating the thin glass sheet with an intense flame to substantially reduce if not eliminate surface roughness of the glass sheet.