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Alloy powder and method for producing same

A manufacturing method and alloy powder technology, applied in chemical instruments and methods, transportation and packaging, metal processing equipment, etc., can solve problems such as the decline in recovery rate, and achieve the effect of effective recovery

Active Publication Date: 2021-02-26
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the degree of reduction is excessively adjusted, valuable metals will also be oxidized and the recovery rate will decrease.

Method used

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  • Alloy powder and method for producing same
  • Alloy powder and method for producing same
  • Alloy powder and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] As the alloy material, a copper-nickel-cobalt alloy consisting of 73.4% by mass Cu-12.1% by mass Ni-12.6% by mass Co-1.6% by mass Fe-0.1% by mass Mn with a sulfur grade and a phosphorus grade of less than 0.1% by mass was used. The gas atomization method pulverizes the alloy material and forms a concentrated portion with high Ni and Co concentrations. The copper-nickel-cobalt alloy is obtained by removing the electrolyte solution from the spent lithium-ion battery and pulverizing the obtained pulverized product so that the pulverized product is oxidized so that the pulverized product is contacted with air with a sufficient surface area and oxidized and roasted at 700 ° C (preheated ), followed by mixing graphite powder as a reducing agent, and separating the slag from the melt obtained by melting at 1500°C.

[0117] The copper-nickel-cobalt alloy was heated to an alloy melting temperature of 1500° C., and an alloy solution obtained as a molten alloy was sprayed with arg...

Embodiment 2

[0126] The alloy powder obtained in Example 1 was classified so that the maximum particle size was 45 μm or less.

[0127] For the classified alloy powder, the average concentration of Ni and Co in the whole particle of one alloy powder was measured using an energy dispersive X-ray spectrometer (manufactured by JEOL Ltd., model JSM-7100F). As a result, Ni The average concentration of Co is 12%, and the average concentration of Co is 13%. In addition, using this energy dispersive X-ray spectrometer, the distribution of the concentration of Ni and Co on the surface of the alloy powder was investigated. As a result, it was found that the concentration of Ni and Co distributed on the surface of the alloy powder was higher than the average concentration of the entire particle. the enrichment department.

[0128] In addition, for the classified alloy powder, the particle size was measured by laser diffraction / scattering method using a particle size distribution measuring device (ma...

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Abstract

Provided are an alloy powder that can be obtained from a waste lithium ion battery, wherein the alloy powder can be dissolved easily in an acid solution and enables efficient recovery of valuable metals contained in the alloy powder; and a method for producing the alloy powder. The 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. Themethod for producing the alloy powder includes a powdering step for powdering a molten alloy by 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.

Description

technical field [0001] The invention relates to an alloy powder and a method for producing the alloy powder. Background technique [0002] In recent years, lithium-ion batteries have become popular as light-weight and high-power secondary batteries. As a lithium-ion battery, there is known a lithium-ion battery in which a negative electrode material in which a negative electrode active material such as graphite is fixed on a negative electrode current collector made of copper foil is sealed in an outer can made of metal such as aluminum or iron, A positive electrode material in which a positive electrode active material such as lithium nickelate or lithium cobaltate is immobilized on a positive electrode collector composed of aluminum foil, a separator composed of a polypropylene porous resin film, and a lithium hexafluorophosphate (LiPF 6 ) and other electrolyte electrolytes, etc. [0003] Hybrid vehicles and electric vehicles are one of the main uses of lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B09B5/00B22F9/08C22B7/00C22B9/10C22B15/00C22B23/02B22F1/05
CPCB09B5/00Y02P10/20C22B7/001C22B5/10C22B1/02C22B3/08C22B3/44C22B3/26C22B15/0028C22B23/0461C22B23/0476C25C1/12Y02W30/84C25C1/08C22C1/0425C22C1/0433B22F9/082H01M10/54H01M4/386H01M4/40H01M4/38H01M4/134Y02E60/10B22F1/05B09B3/40B22F1/00B22F9/08C22B7/00C22B9/10C22B15/00C22B23/02B22F2009/0848C22B7/04C22B15/0054C22B15/0093C22C9/06
Inventor 富樫亮山下雄
Owner SUMITOMO METAL MINING CO LTD