Patent Number: 6,251,158

Title: Production of granules of reactive metals, for example magnesium and magnesium alloy

Abstract: A process of producing granules of a reactive metal. The process comprises providing a source of molten reactive metal (41), forming discrete droplets (53) of the molten metal, contacting the droplets while still substantially molten with a fluidized bed of particles (12) maintained at a temperature substantially below the solidus temperature of the metal and freezing the droplets as discrete granules of the reactive metal in the fluidized bed. The invention also provides apparatus for carrying out the method and product produces by the method, including a magnesium-containing additive for aluminum alloying. The use of a fluidized bed for cooling and freezing the droplets avoids problems encountered in prior methods and also makes it possible to provide coatings of various kinds on the surfaces of the granules, if desired.

Inventors: Dube; Ghyslain (Chicoutimi, CA), Dupuis; Claude (Jonquiere, CA), Langlais; Joseph (Chicoutimi, CA), Lavoie; Serge (Jonquiere, CA), Rompre; Stephane (Sillery, CA), Trottier; Sylvain (Jonquiere, CA), Turcotte; Gilles (Ottawa, CA)

Assignee: Alcan International Limited

International Classification: B22F 9/08 (20060101); B22F 009/08 ()

Expiration Date: 06/26/2018