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Process of extracting RE-Ni-Co alloy from waste hydrogen-storing RE alloy

A technology of hydrogen storage alloy and rare earth nickel, which is applied in the field of metallurgy, can solve the problems of unresearched recycling, low slag and production efficiency, and inability to continuously feed materials, so as to save precious metal element resources, low cost, and protect the environment Effect

Inactive Publication Date: 2007-03-21
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0002] As for how to effectively recycle waste rare earth hydrogen storage alloy (powder), only Germany and Japan have done research on it abroad, but most of them use complex chemical processes such as acid-base treatment, extraction and stripping, which are complicated and difficult to recycle. costly
In China, only a few units such as Nankai University have done some research on the recycling of rare earth hydrogen storage alloy powder in waste nickel-hydrogen batteries. They are smelted in a vacuum induction furnace. Disadvantages such as low production efficiency
And no research has been done on how to recycle the waste with high impurity content generated during the preparation of hydrogen storage alloy powder

Method used

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Embodiment Construction

[0007] The present invention uses waste rare earth hydrogen storage alloy (powder) as raw material, adopts 500kg intermediate frequency induction furnace for melting, melting temperature is 1600-2000°C, melting time: 1-2.5 hours, during the melting process, waste rare earth hydrogen storage alloy (powder) is melted Finally, remove the slag, and then continue to feed, and remove the oxides and other impurities in the waste rare earth hydrogen storage alloy (powder) by forming a slag. forming. The extracted alloy will be directly used as raw material for smelting rare earth hydrogen storage alloy or other purposes. The main components of the alloy are: Ni 65-70%, Co 10-12%, Al 3-5%, Mn 2-4%, RE 10-15%, Ti 1-2%.

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Abstract

The present invention relates to technological process of extracting RE-Ni-Co alloy from waste hydrogen storing RE alloy, is especially technological process of recovering and utilizing alloy from waste produced in preparing Ni / MH cell negative pole material, and belongs to the field of metallurgy technology. The technological process includes smelting waste hydrogen storing alloy powder in a medium frequency induction furnace at 1600-2000 deg.c and casting to form. The technological process is simple, and has no environmental pollution, high alloy element recovering rate and low cost.

Description

1. Technical field [0001] The invention relates to a process for extracting rare-earth nickel-cobalt alloys from waste rare-earth hydrogen storage alloys, in particular to a process for recovering and utilizing waste produced during the preparation of negative electrode materials for Ni / MH nickel-hydrogen batteries, and belongs to the field of metallurgy. 2. Background technology [0002] As for how to effectively recycle waste rare earth hydrogen storage alloy (powder), only Germany and Japan have done research on it abroad, but most of them use complex chemical processes such as acid-base treatment, extraction and stripping, which are complicated and difficult to recycle. costly. In China, only a few units such as Nankai University have done some research on the recycling of rare earth hydrogen storage alloy powder in waste nickel-hydrogen batteries. They are smelted in a vacuum induction furnace. Low production efficiency and other shortcomings. And no research has been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C19/03
Inventor 郭长庆程军
Owner INNER MONGOLIA UNIV OF SCI & TECH