Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By impinging plural liquid masses
Patent
1978-11-20
1982-03-09
Hall, James R.
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By impinging plural liquid masses
B01J 206
Patent
active
RE0308790
ABSTRACT:
A method is disclosed for producing high purity metal powders having an irregular and angular shape and a very low oxygen content (less than 0.25% oxygen in iron and steel powders). The invention utilizes a high pressure liquid atomization procedure for converting the molten metal to angular particulate form, and provides for the very rapid subsequent cooling of the hot particles under conditions of high pressure sprays and violent turbulence of the powder particles in the liquid that minimize the formation of oxide impurities on the particle surface. High pressure atomization to produce angular and irregular particles tends to create an oxidizing environment because of the mixture of hot particles and liquid. By rapidly quenching the particles immediately after formation, in a quenching environment that creates a violently turbulent condition at the surface of the metal, the formation of vapor or steam films is minimized and more rapid heat transfer from the particles to the cooling medium is realized.
REFERENCES:
patent: 1886285 (1932-11-01), Martin
patent: 2159433 (1939-05-01), Ervin
patent: 2636219 (1953-04-01), Beamer et al.
patent: 3334408 (1967-08-01), Ayers
patent: 3428718 (1969-02-01), Helin et al.
patent: 3551532 (1970-12-01), Laird
Chemical Engineers Handbook, 4th Ed. McGraw-Hill Book Co., New York, 1963, pp. 6-29 to 6-32.
Hall James R.
Metal Innovations, Inc.
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