US 12,343,800 B2
Device and method for producing metal powder using an induction coil and an intermediate coil
Henrik Franz, Freigericht Horbach (DE); Christian Lehnert, Hanau (DE); Markus Winton, Karben (DE); and Sergejs Spitans, Frankfurt am Main (DE)
Assigned to ALD VACUUM TECHNOLOGIES GMBH, Hanau (DE)
Appl. No. 18/559,358
Filed by ALD VACUUM TECHNOLOGIES GMBH, Hanau (DE)
PCT Filed May 9, 2022, PCT No. PCT/EP2022/062464
§ 371(c)(1), (2) Date Nov. 7, 2023,
PCT Pub. No. WO2022/238317, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 102021112151.5 (DE), filed on May 10, 2021.
Prior Publication US 2024/0261857 A1, Aug. 8, 2024
Int. Cl. B22F 9/08 (2006.01); C22B 9/00 (2006.01)
CPC B22F 9/082 (2013.01) [C22B 9/003 (2013.01); B22F 2009/0824 (2013.01); B22F 2009/0836 (2013.01); B22F 2009/0848 (2013.01); B22F 2009/088 (2013.01); B22F 2009/0888 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device for producing metal powder, wherein the device comprises:
a melting chamber;
an atomization tower disposed downstream of the melting chamber;
a nozzle assembly for atomizing a melt jet, via which the melting chamber is connected to the atomization tower;
an induction coil arranged within the melting chamber and operable at a melting frequency fmelt, which is configured to locally melt a material rod received at least section-wise therein in order to produce the melt jet to be atomized,
a separate intermediate coil arranged within the melting chamber and operable at a base frequency fbase and arranged downstream of the induction coil and aligned coaxially with the induction coil, wherein the intermediate coil is configured to superheat the melt jet in a region between the induction coil and the nozzle assembly,
wherein the intermediate coil comprises an interference section formed at an end portion of the intermediate coil facing the induction coil, wherein the intermediate coil has a reduced inner diameter in the interference section,
wherein the intermediate coil is configured such that a modulation frequency fmod is modulated onto the base frequency fbase at which the intermediate coil is operable,
wherein a frequency ratio FBS of the base frequency fbase and the melting frequency fmelt is settable to:

OG Complex Work Unit Math