Foam layer thickness of oxy-fuel burning glass kiln

does the subject want to ask "thickness of foam layer in oxy-fuel burning glass furnace"? Thick. Because of the high oxygen content, fuel combustion will produce a lot of carbon dioxide and water vapor, which will produce a lot of tiny foam on the surface of glass liquid. The foam layer almost covers the non-batch covered area in the float glass furnace, and the thickness of the foam layer is 5mm-1mm, or even thicker, so the foam layer of the all-oxygen combustion glass furnace is thick. Glass kiln is a melting device that glass manufacturing industry must have.