Aluminum Company of America

A David Booz

Daniel R Barch

Walter S Cebulak

Ray A Kuchera

David D White, Jr

Kalman E Buchovecky

Robert A Ramser

Adam J Sartschev

Pamela L Claassen

John B Kapustay, Jr

An improved system for the production of particulate metal is disclosed. The system comprises a containment vessel having a sidewall extending to an endwall, a source of metal external to said vessel and nozzle means carried by said endwall, said nozzle means including a central bore and providing communication between said vessel and said external source of metal, the sidewall and endwall cooperating with the nozzle means to seal off the interior of said vessel and the metal particles therein from the area adjacent said source of molten metal. Further, the system comprises a source of atomizing gas flowing through said nozzle means into said vessel and means for redirecting said atomizing gas flowing into said vessel into said central bore to remove deposition in said bore.

Method for controlling the production of atomized powder

An improved apparatus is disclosed for the production of particulate metal comprising a containment vessel having a sidewall extending to an endwall, a source of metal external to the vessel, nozzle means carried by the endwall, the nozzle means including a central bore and providing communication between the vessel and the external source of metal, the sidewall and endwall cooperating with the nozzle means to seal off the interior of the vessel and the metal particles therein from the area adjacent the source of molten metal, a source of atomizing gas flowing through the nozzle means into the vessel, and means for removing depositions in the bore including a source of purging gas directable into the bore.

Method for controlling powder production

Apparatus is provided for the production of atomized metal comprising a containment vessel having a sidewall terminating in a bottom plate through which atomizing gas and molten metal from a molten metal source external to said vessel enter said vessel through nozzle means sealed thereto. An air ingress port is provided in the vessel spaced from said bottom plate; the sidewall and bottom plate cooperating with said nozzle means to seal off the interior of the vessel and the metal particles therein from the area adjacent the source of molten metal; thereby providing an essentially closed vessel, particularly with respect to the area in which the nozzle means are mounted.

Method for the production of atomized metal particles

In a composition of matter including a leafing, metallic pigment and a means for inhibiting reaction of the pigment to form hydrogen gas, the improvement including a liquid fatty acid in an amount effective for at least reducing loss of optical properties which would occur in the absence of such fatty acid. A water-borne coating containing an effective amount of liquid fatty acid for improved optical properties.

Metal pigment of improved storage resistance

A method of forming metal flake from metal particles comprises charging metal particles, liquid and milling material to a mill and operating the mill to form the metal flake. A portion of the metal flake, liquid and milling material is removed from the mill at a rate substantially commensurate with the charging thereto and milling material is separated from the liquid and metal flake.

Metal flake production

An improved apparatus is disclosed for the production of particulate metal comprising a containment vessel having a sidewall extending to a bottom plate, a source of metal external to the vessel, nozzle means carried by the bottom plate, the nozzle means including a central bore and providing communication between the vesel and the external source of metal, the sidewall and bottom plate cooperating with the nozzle means to seal off the interior of the vessel and the metal particles therein from the area adjacent the source of molten metal, a source of atomizing gas flowing through the nozzle means into the vessel, and means for removing depositions in the bore including a source of purging gas directable into the bore.

Apparatus for control of powder production

An improved apparatus for the production of particulate metal is disclosed. The apparatus comprises a containment vessel having a sidewall extending to a bottom plate, a source of metal external to said vessel and nozzle means carried by said bottom plate, said nozzle means including a central bore and providing communication between said vessel and said external source of metal, the sidewall and bottom plate cooperating with the nozzle means to seal off the interior of said vessel and the metal particles therein from the area adjacent said source of molten metal. Further, the apparatus comprises a source of atomizing gas flowing through said nozzle means into said vessel and means for redirecting said atomizing gas flowing into said vessel into said central bore to remove deposition in said bore.

Apparatus for production of atomized powder

An improved method for the production of particulate metal utilizes a containment vessel having a cylindrical shell and an bottomplate, a source of metal external to the vessel, nozzle means carried by the bottomplate and providing communication between the vessel and the external source of metal, gas ingress port spaced from the bottomplate and an exit port, means provided downstream of the vessel for collecting the metal particles swept from the vessel, and aspirating means for drawing collecting gases into the vessel through the ingress port and for carrying the particulate metal from the vessel to the collecting means.

Method for collection of atomized metal particles

Metal flake is formed by charging metal particles, liquid and milling material to a ball mill. Metal flake formed, liquid and milling material are removed from the mill at a rate commensurate with the charging rate. The flake is then separated from the milling material.

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New Kensington, PA, United States of America

A David Booz