between the center body 2 and the tubular member 22 when the burner of fig1 is put into use fuel which may be solid liquid or gaseous is fed through the conduit 7 and distributed in the branch 19 to the conduit 18 and is thence conveyed to and through the nozzles 17 spreading out on departing from the nozzles 17 into an annular jet in the case of slid fuel this fuel is conveyed by means of a gas the oxygen supplied through the inlet 8 to the oxygen chamber 3 ids divided into two flows the one part flow enters into the rear region of the center body 2 the tubular body 12 and flows past the branch 19 entering the nozzle 15 by the intermediary of the throttle the oxygen departs from the nozzle 15 as a jet which is concentrically surrounded by the annular fuel jet from the nozzles 17 the second part flow of oxygen flows into the annular space which is defined by the center body 2 and the casing 4 departs from the oxygen chamber 3 through the nozzles 20 in the wall 5 and then forms an annular jet parallel with the longitudinal axis of the burner by adapting the size of the throttle 16 and the size of the peripheral oxygen nozzles 20 it is possible to regulate the size between the two oxygen part flows the rate of passage through the nozzles depends essentially upon the design of the nozzles since the pressure on the upstream side of the.