Method for recycling value metal from lithium cell slag containing Co, Ni, Mn

A valuable metal, lithium battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problem of high recycling costs

Active Publication Date: 2009-08-19
JX NIPPON MINING & METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Compared with the positive electrode material, C, Al, Si, etc. contained together with Li in the negative electrode material are not valuable metals, and the recycling cost is also higher than the raw material cost

Method used

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  • Method for recycling value metal from lithium cell slag containing Co, Ni, Mn
  • Method for recycling value metal from lithium cell slag containing Co, Ni, Mn
  • Method for recycling value metal from lithium cell slag containing Co, Ni, Mn

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Embodiment Construction

[0077] Leaching and solvent extraction were performed on 100 g of a paste (Co 11%, Ni 11%, Mn 11%, and Li 4.3% hereinafter simply referred to as "paste") containing a ternary metal Li salt. In the test described below, the extraction time was 10 minutes of stirring, the back extraction time was 10 minutes of stirring, and the cleaning was 10 minutes of stirring.

[0078] (1) Leaching

[0079] The paste was poured into 1000 L of a 300 g / l sulfuric acid aqueous solution, stirred while heating at 70 to 80° C. for 4 hours, and then filtered to leave 10 g of residue in a dried state. The metal concentration in the filtrate of 1000L is as follows, which can be leached 100%.

[0080] 【table 3】

[0081] filtrate co Ni mn LI Concentration (g / l) 11 11 11 4.3 Distribution rate (%) 100 100 100 100

[0082] (2) Mn extraction

[0083] After the filtrate was neutralized with 25% NaOH solution, solvent extraction of Mn was performed. The neutralize...

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Abstract

The invention relates to a method for recycling valuable metals from lithium battery residues containing Co, Ni and Mn. Valuable metals such as Mn, Co, Ni and Li are recycled from ternary system Li metal salt of lithium battery residues. The lithium battery residues containing generally equivalent lithium acid metal salt of Co, Ni and Mn are stirred and dipped with hydrochloric acid solution in the concentration of more than 250g / l, or stirred and dipped with sulfuric acid solution in the concentration of more than 200g / l while heating till the temperature of 65 to 80 DEG C, or stirred and dipped for processing with the solution mixed with sulfuric acid solution in the concentration of more than 200g / l and hydrogen peroxide solution in the concentration of more than 20g / l. More than 98% of the three metals of Mn, Co and Ni are extracted with acidic extractant solvent from leach liquor so that the solution containing each metal is produced; therefore, the valuable metals such as Mn, Co, Ni and Li are recycled from these solutions and remaining liquid containing Li after extraction.

Description

technical field [0001] The invention relates to a method for recovering valuable metals from lithium battery slag containing Co, Ni and Mn. The so-called lithium battery slag containing Co, Ni, and Mn is a slurry composed of ternary Li metal salt and carbon, N-methyl (methyl)-2-pyrrolidone (pyrrolidone), polyvinyl alcohol (polyvinyl alcohol) and other solvents. The solid substance is a dross generated due to reasons such as inability to charge when various substances are charged to predetermined parts of the battery in the lithium secondary battery manufacturing process. The treatment of lithium metal oxides which are present in these battery slags and contain valuable metals is important from the viewpoint of recovery of valuable metals. Background technique [0002] Patent Document 1: Japanese Unexamined Patent Publication No. 6-251805. Lithium batteries had not yet been developed in 2015 at the time of the application, but preparations were made for the cycle of lithium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C22B3/08C25C1/06
CPCY02E60/12Y02P10/20Y02W30/84C22B3/10C22B3/44C22B7/006C22B23/0407C22B26/12C22B47/00H01M10/54
Inventor 山口阳介日野顺三
Owner JX NIPPON MINING & METALS CO LTD
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