Title:
希土類元素の分離回収方法
Document Type and Number:
Japanese Patent JP6425018
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for recovering a rare earth element from scraps of a motor using a rare earth magnet and the like in which a rare earth element is favorably separated from iron and the rare earth element is efficiently separated and recovered.SOLUTION: The method for separating and recovering a rare earth element is a method for separating and recovering a rare earth element from a raw material including a rare earth magnet and an iron material, which comprises melting the raw material in the coexistence of a metal silicon source and an alkali silicate in an inert atmosphere to suppress oxidation of iron, forming an Fe-Si molten alloy while on the other hand selectively oxidizing a rare earth element to form a molten slag, and separating and recovering the molten slag from the Fe-Si molten alloy.SELECTED DRAWING: Figure 1
Inventors:
Willa Serany Chompuneut
Millevariev Linato
Satoru Okada
Millevariev Linato
Satoru Okada
Application Number:
JP2014249212A
Publication Date:
November 21, 2018
Filing Date:
December 09, 2014
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C22B59/00; C01F17/00; C22B7/00
Domestic Patent References:
| JP2006077264A | ||||
| JP2014181370A |
Other References:
Yang.Yほか,Recovery of rare earth elements from EOL permanent magnets with slag extraction,Proceedings of the third international slag valorisation symposium,2013年,p.249-252,URL: http://www.slag-valorisation-symposium.eu/2013/images/papers/ps3_1_Yang.pdf
Attorney, Agent or Firm:
Hiroshi Chiba