Process for atomizing liquid metals to produce finely granular powder
US4640806A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Oct 1, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2009/088
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Very finely granular metal powders are produced by atomizing a liquid jet of metal by means of a gas jet which, in addition to a continuous band of sound frequencies, contains at least one discrete sound frequency which is at least 5 decibel above the average intensity of this band, and which is generated in a rotationally symmetrical device by means of a nozzle (4) which has the shape of a hollow cone and by means of an annular resonance space (7) with an annular edge (6) and is projected concentrically against the liquid jet of metal at a total opening angle of an average 35.degree. to 55.degree.. The atomization zone of the gas jet should preferably contain at least three discrete sound frequencies which are each at least 10 decibel above the sound intensity of the continuous band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.