Abstract A device for accelerating the physical and chemical processes in metallurgical metallic melts or similar dense media of elevated temperatures includes a rotatable stirrer which is adapted to dip into the melt. In accordance with the invention, the stirrer includes a central suction pipe and a plurality of radially outwardly extending ejection ducts connected into the suction pipe at the upper end thereof. A feature of the construction is that the ejection ducts are defined in a disclike member which, at least on the side carrying the suction pipe, is formed as a smooth solid body of a refractory material and the suction pipe, is formed as a smooth solid body of a refractory material and the suction pipe is connected axially symmetrical thereto. In one embodiment, the underside of the solid body has a polygonal base in order to facilitate the stirring action on the melt. Ejection ducts advantageously terminate at the corners of the polygonal solid body. In some instances, it is also desirable to form the top side with projections or flat edges for entraining the melt and the slag and for aiding in its intermixing.
A device, according to claim 1, wherein said disc portion has a polygonal base.
Claim 2
Dependent Claim
44 words
A device, according to claim 1, wherein said ejection passages terminate in radially outwardly extending discharges, said disc portion defining at least on its side adjacent said suction pipe, a polygonal solid body portion terminating in corners adjacent the discharges of said ejection ducts.
Claim 3
Dependent Claim
26 words
A device, according to claim 1, wherein said disc portion has entrainment means defined adjacent the upper edge thereof for entraining the melt and slag material.
Claim 4
Dependent Claim
12 words
A device, according to claim 4, wherein said means comprises projecting surfaces.
Claim 5
Dependent Claim
58 words
A device, according to claim 1, wherein said disc portion includes a top frustoconical central portion and a rotatable shaft portion at the upper end of said frustoconical portion, and a flat substantially horizontal intermediate portion extending radially outwardly from said frustoconical portion and adapted to be located adjacent the surface of the slag layer of the melt.
Claim 6
Dependent Claim
48 words
A device, according to claim 6, wherein there are at least four separate ejection ducts defined in said disc portion extending substantially radially outwardly from said suction pipe and each being at right angles to each other, said ejection ducts extending upwardly and outwardly to a radial discharge.