Device for producing a hot propellant jet

In a device for producing a hot propellant jet intended to atomize, and subsequently vitrify, liquid inorganic melts such as, for instance, slags or glass, of the type including a burner chamber containing a burner having a burner axis and constructed to produce a flame within said burner chamber and a burner chamber wall defining said burner chamber, the improvement comprising a further wall surrounding said burner axis and forming an annular chamber with said burner chamber wall, a plurality of water and/or vapor inlet openings arranged in said further wall in a manner distributed in the direction of said burner axis and about the periphery of said flame, and a lance including a lance nozzle and connected to said burner chamber.