Invention Grant
- Patent Title: Method and apparatus for the production of high purity spherical metallic powders from a molten feedstock
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Application No.: US16981692Application Date: 2019-03-18
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Publication No.: US11772159B2Publication Date: 2023-10-03
- Inventor: Bernard Allard , Pierre Carabin , Christopher Alex Dorval Dion , Milad Mardan , François Proulx
- Applicant: PYROGENESIS CANADA INC.
- Applicant Address: CA Montreal
- Assignee: PYROGENESIS CANADA INC.
- Current Assignee: PYROGENESIS CANADA INC.
- Current Assignee Address: CA Montreal
- Agency: Benoit & Côté Inc.
- Agent Michel Sofia
- International Application: PCT/CA2019/000034 2019.03.18
- International Announcement: WO2019/178668A 2019.09.26
- Date entered country: 2020-09-16
- Main IPC: B22F9/14
- IPC: B22F9/14 ; B22F9/08 ; H05H1/42 ; B22F1/065

Abstract:
An apparatus for producing metallic powders from molten feedstock includes a heating source for melting a solid feedstock into a molten feed, and a crucible for containing the molten feed. A liquid feed tube is also provided to feed the molten feed as a molten stream. A plasma source delivers a plasma stream, with the plasma stream being adapted to be accelerated to a supersonic N velocity and being adapted : to then impact the molten stream for producing metallic powders. The feed tube extends from the crucible to a location where a supersonic plasma plume atomizes the molten stream. The plasma source includes at least two plasma torches provided with at least one supersonic nozzle aimed towards the molten stream. The multiple plasma torches are disposed symmetrically about the location where the supersonic plasma plumes atomize the molten stream, such as in a ring-shaped configuration.
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