Title:
水素吸蔵合金の酸素低減方法
Document Type and Number:
Japanese Patent JP3614987
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To remove oxides as slag and to easily and inexpensively recover effective components in an alloy into reclaimable state by adding misch metal, etc., to a recovered hydrogen storage alloy powder and melting them in an inert gas or in vacuum. SOLUTION: A hydrogen storage alloy powder, recovered from the cathode of a nickel - hydrogen storage alloy secondary battery, is preferably formed into briquettes previously by means of a pressing machine or a briquetting machine. Then, misch metal, La, Ce, Pr, Nd, etc., are added by >=25wt.% to the hydrogen storage alloy powder, which is heated in an inert gas or in vacuum to about 900-1500 deg.C and melted. The oxides in the resultant molten alloy are separated as slag. By this method, the recovered hydrogen storage alloy is deoxidized without using a wet process and highly purified and is recovered as a raw material for an alloy for secondary battery, after being cast in a water cooled mold or in this state.
Inventors:
Hiroshi Sumita
Sadayuki Komatsu
Toshitaka Masao
Sadayuki Komatsu
Toshitaka Masao
Application Number:
JP19035396A
Publication Date:
January 26, 2005
Filing Date:
July 19, 1996
Export Citation:
Assignee:
Mitsui Mining & Smelting Co., Ltd.
International Classes:
C22B7/00; C22B9/10; C22B59/00; H01M4/38; H01M10/54; (IPC1-7): C22B7/00; C22B9/10; C22B59/00; H01M4/38; H01M10/54
Domestic Patent References:
| JP8115752A | ||||
| JP3215634A | ||||
| JP3170627A | ||||
| JP619533A | ||||
| JP28332A |
Attorney, Agent or Firm:
Toshiro Mitsuishi
Tadahiro Mitsuishi
Tadahiro Mitsuishi