Title:
STIRRING PROCESS AND STIRRING SYSTEM FOR NEODYMIUM-IRON-BORON POWDER AND PROCESS FOR MANUFACTURING NEODYMIUM-IRON-BORON MAGNETIC STEEL
Document Type and Number:
WIPO Patent Application WO/2021/103064
Kind Code:
A1
Abstract:
Disclosed are a stirring process and a stirring system for a neodymium-iron-boron powder and a process for manufacturing a neodymium-iron-boron magnetic steel. The stirring process for the neodymium-iron-boron powder mainly comprises the following aeration, feeding and stirring. Specifically, the aeration refers to filling a mixer with nitrogen and/or an inert gas, with the internal space of the mixer closed; the feeding refers to placing a neodymium-iron-boron powder to be stirred into the mixer and keeping the internal space of the mixer closed; and the stirring refers to introducing the mixer with a pulsed air stream, which is an intermittently jetted air stream formed by nitrogen and/or an inert gas, and by which the neodymium-iron-boron powder can be repeatedly blown up and down to mix and stir the neodymium-iron-boron powder. The invention involves mixing and stirring the neodymium-iron-boron powder with the pulsed air stream, which not only can make the powder mix fully and uniformly, but also has a shorter stirring time and a higher working efficiency.
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Inventors:
MAO HUAYUN (CN)
ZHOU TIEFU (CN)
MAO CONGYAO (CN)
JIN XIAOPING (CN)
LIU JIAN (CN)
ZHOU TIEFU (CN)
MAO CONGYAO (CN)
JIN XIAOPING (CN)
LIU JIAN (CN)
Application Number:
PCT/CN2019/122865
Publication Date:
June 03, 2021
Filing Date:
December 04, 2019
Export Citation:
Assignee:
JL MAG RARE EARTH CO LTD (CN)
International Classes:
B01F33/40; H01F41/02
Foreign References:
| CN207913677U | 2018-09-28 | |||
| CN105879763A | 2016-08-24 | |||
| CN109273241A | 2019-01-25 | |||
| CN106216666A | 2016-12-14 | |||
| SU421350A1 | 1974-03-30 |
Other References:
SHEN JUNLAN, WANG CHUN-FANG, CHEN AN-SHI, ZHOU QING-LING: "Design and Application of Impulse Type Air Flow Mixer", ZHEJIANG CHEMICAL INDUSTRY, ZHEJIANG SHENG HUAGONG YANJIUYUAN, CN, vol. 42, no. 1, 1 January 2011 (2011-01-01), CN, pages 21 - 22, XP055815159, ISSN: 1006-4184
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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