High capacity device for the preparation of a mixture comprising a solid phase and a liquid phase of a metal alloy

A device for the preparation of a mixture comprising a solid phase and a liquid phase of a metal alloy in which the concentration of the solid phase has a predetermined value, characterized by the fact that it comprises a plurality of superimposable elements in the form of plates each of which is provided with a first series of through holes disposed in a predetermined configuration, the corresponding holes of said superimposable elements defining, when the elements are superimposed, a plurality of ducts lying in side-by-side relation, each of the ducts so formed being in communication with a supply reservoir for the alloy, whereby the ducts can be traversed by a flow of the alloy, there being disposed along each of the said ducts a plurality of helical vanes the longitudinal axes of which coincide with the longitudinal axis of the duct itself, each of which vanes acts to divide the associated flow of material into at least two streams and to impart to each such stream a substantially helical path, the diameter of each of the said ducts being between 2 and 10 mm.