| 发明名称 |
METHOD FOR RECOVERING RARE EARTH ELEMENT |
| 摘要 |
An object of the present invention is to provide a method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element, which can be put into practical use as a low-cost, simple recycling system. The method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element of the present invention as a means for resolution is characterized by including at least a step of separating a rare earth element in the form of an oxide from an iron group element by subjecting a workpiece to an oxidation treatment, then turning the treatment environment into an environment where carbon black is present, and subjecting the oxidation-treated workpiece to a heat treatment at a temperature of 1000° C. or more in an inert gas atmosphere or in vacuum. |
| 申请公布号 |
US2015344991(A1) |
申请公布日期 |
2015.12.03 |
| 申请号 |
US201314654906 |
申请日期 |
2013.12.26 |
| 申请人 |
Hitachi Metals, Ltd. |
发明人 |
MIYAMOTO Yu;HOSHI Hiroyuki;KIKUGAWA Atsushi |
| 分类号 |
C22B59/00;C22B7/00 |
主分类号 |
C22B59/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element, characterized by including at least a step of separating a rare earth element in the form of an oxide from an iron group element by subjecting a workpiece to an oxidation treatment, then turning the treatment environment into an environment where carbon black is present, and subjecting the oxidation-treated workpiece to a heat treatment at a temperature of 1000° C. or more in an inert gas atmosphere or in vacuum. |
| 地址 |
Tokyo JP |
