公开(公告)号：US11839918B2

公开(公告)日：2023-12-12

申请号：US16972949

申请日：2019-06-06

Applicant: PYROGENESIS CANADA INC.

Inventor： François Proulx ,  Christopher Alex Dorval Dion ,  Pierre Carabin

IPC: B22F9/14 ,  B22F9/08 ,  H05H1/26 ,  B22F1/065

CPC classification number: B22F9/14 ,  B22F1/065 ,  B22F9/082 ,  H05H1/26 ,  B22F2009/0824 ,  B22F2009/0848 ,  B22F2202/13 ,  B22F2999/00

Abstract: The present application relates to a plasma atomization process and apparatus for producing metallic powders from at least one wire/rod feedstock. In the process, an electric arc is applied to the at least one wire/rod feedstock to melt the same. A plasma torch is employed to generate a supersonic plasma stream at an apex at which the electric arc is transferred to the at least one wire/rod feedstock to atomize the molten wire/rod feedstock into particles. A downstream cooling chamber solidifies the particles into the metallic powders. An anti-satellite diffuser is employed to prevent recirculation of the powders in order to avoid satellite formation. In an apparatus where two wires are fed, one wire serves as an anode, and the other as a cathode.

公开(公告)号：US11772159B2

公开(公告)日：2023-10-03

申请号：US16981692

申请日：2019-03-18

Applicant: PYROGENESIS CANADA INC.

Inventor： Bernard Allard ,  Pierre Carabin ,  Christopher Alex Dorval Dion ,  Milad Mardan ,  François Proulx

IPC: B22F9/14 ,  B22F9/08 ,  H05H1/42 ,  B22F1/065

CPC classification number: B22F9/082 ,  B22F1/065 ,  B22F9/14 ,  H05H1/42 ,  B22F2009/088 ,  B22F2009/0824 ,  B22F2009/0832 ,  B22F2202/13

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.