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Abstract

A method for powder scarfing of metal resides in that combustible gas and oxygen are fed to a zone (9) of treating a metal (10) in order to form a heating flame. Then, flux is delivered by means of a flux-carrier gas, whereupon the former is separated from the latter, and the separated gas is discharged. The flux is directed to the zone (9) of treating the metal (10) in-between the jets of combustible gas and oxygen, whereupon the flux is melted in a heating flame to form a molten bath in the metal treating zone (9). An apparatus for carrying into effect the above method comprises a body (1) formed with ducts (2), (7), (13) and (16) for supplying combustible gas, oxygen and flux therethrough, which open into an outlet cavity (8) presented to the metal treating zone (9). Mounted on the body (1) is a separating chamber (18) having a gas outlet (23) and a pipeline (21) for supplying flux into the separating chamber (18) by means of a flux-carrier gas. The separating chamber (18) has its bottom part, adjoining the body (1), formed with a flux outlet opening (25), and the wall of the body (1) adjoining the separating chamber (18), has a tapered projection (26) spaced opposite the flux outlet opening (25). Formed by the tapered projection (26) and the walls of the body (1) is an annular cavity (27) which is brought in communication with the outlet cavity (8) through ducts (32), intended for supplying flux to the zone (9) of treating the metal (10).

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First Claim