Alloy powder and method for producing same

Patent metadata

Field	Value
Publication number	US-2021126300-A1
Application number	US-201917258763-A
Country	US
Kind code	A1
Filing date	Jul 11, 2019
Priority date	Jul 12, 2018
Publication date	Apr 29, 2021
Grant date	—

Abstract

Provided are: an alloy powder that can be obtained from a waste lithium ion battery, wherein the alloy powder can be dissolved in an acid solution and enables recovery of metals contained in the alloy powder; and a method for producing the alloy powder. This alloy powder contains Cu and at least one of Ni and Co as constituent components, wherein a portion having a higher concentration of the at least one of Ni and Co than the average concentration in the entire alloy powder is distributed on at least the surface, and the phosphorus grade is less than 0.1% by mass. The method for producing the alloy powder includes a powdering step for powdering a molten alloy using a gas atomization method, the molten alloy containing Cu and at least one of Ni and Co as constituent components and having a phosphorus grade of less than 0.1% by mass.

First claim

1 - 5 . (canceled)

6 . A method for producing an alloy powder, the method comprising:
a melting step of melting a waste lithium ion battery so as to obtain a molten material; a slag separation step of separating slag including phosphorus from the molten material so as to recover an alloy material which contains Cu and at least one of Ni and Co; and a powdering step of powdering, with a gas atomization method, a molten alloy which is formed of the alloy material and in which a phosphorus grade is less than 0.1% by mass.

7 . The method for producing an alloy powder according to claim 6 , the method further comprising: a pre-heating step of roasting, before the melting step, the waste lithium ion battery at such a temperature that the waste lithium ion battery is not melted.

8 . The method for producing an alloy powder according to claim 6 , wherein a molten material of a copper-nickel-cobalt alloy is used as the molten alloy.

9 . The method for producing an alloy powder according to claim 7 , wherein a molten material of a copper-nickel-cobalt alloy is used as the molten alloy.

Assignees

• Sumitomo Metal Mining Co

Inventors

• Togashi Ryo
• Yamashita Yu

Classifications

• B22F1/00

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F1/05

  Metallic powder characterised by the size or surface area of the particles · CPC title

• Y02P10/20

  Recycling · CPC title

• B09B3/70

  Chemical treatment, e.g. pH adjustment or oxidation (involving an extraction step B09B3/80) · CPC title

• B09B3/35

  Shredding, crushing or cutting · CPC title