Method for separating copper from nickel and cobalt
A separation method and alloy technology, applied in the direction of copper sulfide, nickel sulfate, cobalt sulfate, etc., can solve the problems of recovery loss, difficulty in dissolution, and difficulty in separation
Pending Publication Date: 2020-04-24
SUMITOMO METAL MINING CO LTD
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Problems solved by technology
[0025] However, after dry treatment as described above, there is still the problem of recovery loss due to the cobalt contained in the spent LIB being distributed to the slag
[0026] Although it has also been considered to implement such a reducing melting method by adjusting the environment, temperature and reduction degree in the dry treatment so that the cobalt is distributed as metal and reduces the distribution to the slag, the problem that exists in this way is: use this method The obtained metal forms an insoluble corrosion-resistant alloy based on copper and contains nickel / cobalt, and it is difficult to dissolve even with acid to separate and recover valuable components
However, it is not easy to separate large amounts of copper from nickel or cobalt in an easy and low-cost way
Method used
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Embodiment 1～18
[0087] The waste lithium-ion battery (waste LIB) is subjected to dry treatment of heating, melting and reduction to obtain a molten soup containing alloys of copper, nickel and cobalt, which is poured into a small crucible with a hole in the bottom, and the liquid that flows out of the hole The molten soup is sprayed with high-pressure gas and high-pressure water to make the molten soup scatter, solidify and sieve, thereby obtaining powdered alloy powder with a particle size of 300 μm or less (this alloy powder is referred to as "atomized powder" for convenience below). Table 1 shows the results of analyzing the obtained alloy powder using an ICP analyzer.
[0088] Next, 1.0 g of the above-mentioned alloy powder was taken in each example. Then, in each example, 0.35 g of elemental sulfur (solid sulfur) required to form copper sulfide represented by the above formula (1) relative to the copper grade in the alloy powder was prepared.
[0089] In addition, in each example, 1.2 equ...
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Abstract
Provided is a method for separating copper from nickel and cobalt with which it is possible to selectively and efficiently separate copper, as well as nickel and cobalt, from an alloy including copper, nickel, and cobalt such as an alloy having high corrosion resistance that includes copper, nickel, and cobalt obtained by dry treatment of waste lithium ion cells. An alloy including copper, nickel,and cobalt is brought into contact with sulfuric acid in the joint presence of a sulfurizing agent, and a solid containing copper and a leachate containing nickel and cobalt are obtained.
Description
technical field [0001] The present invention relates to a method for separating copper from nickel and cobalt from an alloy containing copper, nickel and cobalt. Background technique [0002] Lithium-ion batteries (hereinafter also referred to as "LIB"), which are characterized by light weight and high output, are installed in vehicles such as electric cars and hybrid cars, and electronic devices such as mobile phones, smartphones, and personal computers. [0003] LIB has a structure in which a spacer made of a polypropylene porous resin film or the like is placed inside an outer packaging can made of metal such as aluminum or iron or plastic such as vinyl chloride, and a copper foil is used for Negative electrode current collector and the negative electrode material with graphite and other negative electrode active materials fixed on the surface, and the positive electrode material with positive electrode active materials such as lithium nickelate and lithium cobaltate fixe...
Claims
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IPC IPC(8): C22B23/00C22B3/08C22B3/44C22B7/00
CPCC22B23/043C22B15/0071C22B23/0461Y02E60/10C01G3/12C01G53/10C01G51/10H01M10/54H01M10/0525H01M4/525Y02P10/20Y02W30/84C22B3/08C22B23/005C22B7/007C22B3/44
Inventor 桧垣达也竹之内宏小林宙浅野聪
Owner SUMITOMO METAL MINING CO LTD