FIELD: plasma-arc burners. SUBSTANCE: burner has means for passing plasma-forming gas through chamber from inlet to outlet hole and ribs on butt-end wall of nozzle for conveying plasma-forming gas flow from inlet to outlet hole; ribs are arranged over circumference about outlet hole; electrode and nozzle are mounted for relative displacement. EFFECT: improved performance and efficiency, reduced cost. 45 cl, 6 dwg
