US 11,986,836 B2
Device and method for the addition of liquid additives in the form of a spray during a jet milling step in a process for the manufacture of sintered NdFeB alloy magnets
Yulong Zhai, Yantai (CN); Sijing Lyu, Yantai (CN); Dajun Zhao, Yantai (CN); Xiaochen Zhai, Yantai (CN); and Kaihong Ding, Yantai (CN)
Assigned to Yantai Dongxing Magnetic Materials Inc., Yantai (CN)
Filed by Yantai Dongxing Magnetic Materials Inc., Yantai (CN)
Filed on Sep. 2, 2021, as Appl. No. 17/464,722.
Claims priority of application No. 202010917549.2 (CN), filed on Sep. 3, 2020.
Prior Publication US 2022/0105522 A1, Apr. 7, 2022
Int. Cl. B02C 23/18 (2006.01); B22F 9/04 (2006.01)
CPC B02C 23/18 (2013.01) [B22F 2009/044 (2013.01)] 12 Claims
OG exemplary drawing
 
1. Device for the addition of liquid additives in the form of a spray during a jet milling step in a process for the manufacture of sintered NdFeB alloy magnets, wherein the device comprises:
a storage barrel (1) for the liquid additive;
a weighing bucket (2) which is in fluid communication with the storage barrel (1) and is adapted for weighing a predetermined amount of the liquid additive;
a powder container (6) to accommodate NdFeB alloy material prior to or after jet milling, wherein the powder container (6) includes an opening (20) that is plugged with a blind flange (5);
a connecting pipe (4), which is in fluid communication with the weighing bucket (2) and passes through an opening (5-2) of the blind flange (5) into the interior of the powder container (6); and
a fluid atomization nozzle (19) located at the end of the connecting pipe (4).