Accession Number : ADD018313

Title :   Continuous Fluid Atomization of Materials in a Rapidly Spinning Cup.

Descriptive Note : Patent Application, Filed 14 Jun 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ayers, Jack D ; Cooper, Khershed

PDF Url : ADD018313

Report Date : 14 Jun 1996

Pagination or Media Count : 30

Abstract : Fine powders are made from molten metals and alloys on a continuous basis. A rapidly spinning shallow cup has an atomizing fluid such as water, oil or any other hydrocarbon supplied to the cup to form a thin sheet or layer which is distributed on the inner surface of the cup. Within the cup a stream or spray of molten metal is propelled into this thin sheet of atomizing fluid. The metal interacts with the atomizing fluid film and is fragmented or broken down into many small droplets which are quenched by the atomizing fluid and solidified into fine powder. These powders in the form of a slurry with the atomizing fluid can be continuously removed as the slurry discharges up over the lip of the cup by centrifugal force and the powders can be recovered. In a preferred embodiment a preatomizer is positioned is between the incoming stream of molten metal and the spinning cup. This breaks up the molten stream into a series of droplets that will be directed to the atomizing liquid film on the inner wall of the spinning cup so that even finer particles will be produced.

Descriptors :   *FLUIDS, *FINE GRAINED MATERIALS, *ATOMIZATION, PATENT APPLICATIONS, INTERACTIONS, LAYERS, WATER, POWDERS, MELTS, SOLIDIFICATION, ALLOYS, QUENCHING, SURFACES, SLURRIES, PARTICLES, CHEMICAL REACTIONS, HYDROCARBONS, SHEETS, DROPS, WALLS, THINNESS, OILS, SPRAYS, CONTINUOUS PROCESSING, MATERIALS RECOVERY, STREAMS, LIQUID METALS, CENTRIFUGAL FORCE

Subject Categories : Inorganic Chemistry
      Properties of Metals and Alloys
      Physical Chemistry
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE