Process for producing metal powders having low oxygen content

Details Process for producing metal powders having low oxygen content Process for producing metal powders having low oxygen content

1977-12-05

1982-07-13

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging plural liquid masses

264 12, 264 13, 264 14, B01J 206

Patent

active

043394019

ABSTRACT:
Apparatus and method for water atomizing molten metal to provide a low oxygen metal powder. A molten metal stream is introduced to an atomization vessel containing a pressurized inert gas. The metal stream is atomized by impingement of high pressure water within the atomization vessel. The atomization vessel has an exit aperture located so that the slurry of water and metal powder can exit from the atomization vessel only after deflection within the atomization vessel. Inert gas contained within the atomization vessel and entrapped within the slurry during atomization begins to leave the slurry during deflection, the inert gas returning to the atomization vessel atmosphere. The inert gas removal process continues after passage through the exit aperture and entrance into a closed degassing vessel. In this vessel, substantially all of the inert gas is removed from the slurry by gravity separation for return to the atmosphere of the atomization vessel, and the turbulent conditions initially present in the slurry are substantially dissipated prior to passage of the slurry from the closed degassing vessel.

REFERENCES:
patent: 305758 (1884-09-01), Randolph
patent: 2460992 (1949-02-01), Brasse et al.
patent: 2956304 (1960-10-01), Batten et al.
patent: 3533136 (1967-06-01), Holtz, Jr.
patent: 3963812 (1976-06-01), Schlienger

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