TORCH Russian patent published in 1995 - IPC

FIELD: thermal power engineering. SUBSTANCE: torch has case with air admission pipes, tunnel, and nozzle. Intermediate pipe union with annular channel is axially attached to case on tunnel end; converging nozzle whose edge is inserted in intermediate pipe union channel to form annular gap between converging nozzle wall and internal surface of intermediate pipe union channel is axially arranged at outlet of gas supply tube. Diameter of converging nozzle exit section makes up 0.2 to 0.3 of intermediate pipe union channel diameter. EFFECT: improved temperature in flame, improved capacity in heating lining of various buckets and mixers, improved quality of ingots, reduced metal loss due to better heating of lining and lower reduction of liquid metal temperature. 1 dwg