Method of production of metallic granules, products obtained and a device for the application of the said method
AssigneeExtramet
InventorGerard Bienvenu
Life of this patent
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Abstract
Metal in the form of granules is solidified from the molten state by forming a jet of molten metal which is caused to pass through a vibrating orifice in order to divide the jet into individual drops and causing solidification of the drops by cooling so as to form the granules. The drops of the jet are caused to fall from the vibrating orifice under the action of gravity through an inert gas atmosphere which is maintained at a temperature below the solidification temperature of the molten metal. In the case of reactive metals, the jet is formed by withdrawal from a mass of molten metal maintained in contact with a bath which is not miscible with the molten mass and selectively dissolves the derivatives produced in the event of oxidation.
Claims12
A method of production of metallic granules in which the granules are formed by solidification from molten metal, comprising passing the molten metal in a divided state through a purification bath, collecting said molten metal into a mass, separating, said molten metal from said bath by settling, forming a jet of molten metal by withdrawal from said mass, passing said molten metal through a vibrating orifice in order to divide the jet into individual drops and solidfying said drops by cooling so as to form granules.
A device for producing metallic granules comprising a heating means for melting metal, a vessel for receiving molten metal from said heating means, a purification bath disposed in said vessel, means for causing the molten metal to pass in the divided state through the purification bath, means for separating said mass from said bath by settling within said vessel, means for forming a jet of metal withdrawn from said mass through a vibrating orifice, means for causing vibration of said orifice and thus dividing the jet into individual drops, and a chamber for cooling and solidifying the metal discharge from said orifice over at least the distance of travel of the drops during the solidification of said drops.
Dependencies are inferred from the claim text.