Patent ID: 11865651
Assignee: KJELLBERG-STIFTUNG
Field: Chemical engineering (Chemistry)
Classification: CPC B  H | IPC B  H

Claim 16:
17. A method for conducting gas in a gas-cooled plasma torch, wherein the plasma torch has a plasma torch body which holds an electrode with an open end and a closed end, wherein a cavity extends from the open end in the direction of the closed end, and which, with a spacing in an axial direction, holds a nozzle by means of a nozzle holder, wherein the nozzle has a central opening with an upstream inlet end, into which the electrode projects, and with an outlet end with a nozzle bore and is surrounded by a nozzle cap and/or a nozzle protection cap, wherein the plasma torch body has an opening for the gas feeder, wherein the method comprises:
conducting a total gas stream through the opening for the gas feeder;
branching off either i) a second partial gas stream or ii) a first and a second partial gas stream or iii) a second and a third partial gas stream from the total gas stream upstream of the electrode via a channel in the plasma torch body;
conducting the remaining gas stream through the open end of the electrode into the cavity in the direction of the closed end of the electrode;
conducting the remaining gas stream out of the electrode via at least one opening in the wall of the electrode; and
conducting the first partial gas stream of the total gas stream through the first space formed between the electrode and the nozzle and through the nozzle bore, conducting the second partial gas stream of the total gas stream through a second space formed by the nozzle and the nozzle cap and/or through a second space formed by the nozzle and the nozzle protection cap and possibly also outward through one or more openings in the nozzle protection cap, and conducting the third partial gas stream of the total gas stream through a third space formed between the electrode and a gas-conducting unit and through one or more openings in the gas-conducting unit to the outer side of the plasma torch.