REFINING DEVICE FOR MOLTEN METALS OR ALLOYS Russian patent published in 2010 - IPC C22B9/05 C21C5/48 

FIELD: metallurgy.

SUBSTANCE: refining device includes independently located paths and nozzles for supply of inert and active gases. Inert gas nozzles are equally spaced in circumferential direction. Number of nozzles is 2 to 6. Outlet holes of inert gas nozzles have diametre of 0.3 to 1.5 mm. Active gas nozzle has diametre of 2 to 8 mm. Active gas path is arranged concentrically inside inert gas path. To external surface of inert gas path there applied is heat-insulating layer 5-15 mm thick, and metal relaxation oscillator of thermal stresses is taken out in a movable manner.

EFFECT: increasing wear resistance of the device at maintaining high efficiency of the refining process, simple design and low production cost.

2 cl, 1 dwg