INJECTION DEVICE FOR BLOWING OR INJECTING OXYGEN-ENRICHED GASES INTO METALLURGICAL UNIT OR MELTING VESSEL AND AN ELECTRIC FURNACE Russian patent published in 2017 - IPC C21C5/46 C21B7/16 F27D3/18 

FIELD: metallurgy.

SUBSTANCE: device comprises an injector device for creating a high velocity jet from oxygen gas jet and ignited jet of mixture of combustible gas and air in which the injector device comprises a Laval nozzle located in the nozzle head to create a gas stream of oxygen and in which a mixture of combustible gas and air is created by means of mixing element for mixing flammable gas and air. The Laval nozzle element and the mixing element are located together one after the other, configured to disengage along the medial longitudinal axis of the injector device and forming an annular gap between the nozzle head and the Laval nozzle element, wherein the annular gap includes a flammable gas channel and an air channel of the mixing element. The size of the annular gap is adjustable depending on the axial distance between the element in the form of the Laval nozzle and the mixing element. The Laval nozzle element and the mixing element are arranged concentrically inside and/or on the nozzle head part.

EFFECT: invention allows to simplify the design of the injector device which will simplify its manufacture and maintenance.

29 cl, 11 dwg