Internal combustion burner, particularly for drawing mineral fibers

An internal combustion burner, comprising:

• a combustion chamber, into which at least one duet for feeding fuel and oxidizer opens, and provided with an expansion orifice,
• wherein the combustion chamber is provided with a plurality of flame stabilizing elements each having two solid walls substantially facing each other and joined together at one end by a solid end wall to constitute a semi-open opening zone opposite the solid end wall, a confinement zone being created between the two solid walls and near the opening zone, in which confinement zone at least part of combustion between the oxidizer and fuel takes place;
• wherein the at least one duct is connected to feed ducts fed with a gas containing one or more fuels and the feed ducts open via a plurality of outlet orifices for outputting said one or more fuels into said confinement zone at a first velocity, said plurality of outlet orifices being located such that each outlet orifice of said plurality is located between two adjacent flame stabilizing elements and downstream from the adjacent flame stabilizing elements so as to be offset with respect to an axis of symmetry of each flame stabilizing element,
• wherein the at least one duct includes a feed duct fed with gas containing the oxidizer and that opens into the combustion chamber so as to spray the oxidizer at a second velocity on a side of the walls of the flame stabilizing elements that is opposite a side in direct contact with the confinement zone of the flame stabilizing elements, and
• wherein the first velocity is higher than the second velocity, such that said fuels flow from said plurality of outlet orifices to said confinement zone and the combustion occurs within the confinement zone.