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A method for comprehensive recovery of valuable metals from waste lithium-ion battery materials

A technology for lithium-ion batteries and valuable metals, which is applied in the field of recycling and electronic waste recycling, can solve the problems of difficult lithium recovery, complex purification and separation procedures, etc., and achieve the effects of low reagent cost, reduced energy consumption, and high-efficiency recovery

Active Publication Date: 2018-12-07
GUANGDONG GUANGHUA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the invention is to solve the problems of complex purification and separation procedures and difficult recovery of lithium in the traditional process

Method used

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  • A method for comprehensive recovery of valuable metals from waste lithium-ion battery materials

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Experimental program
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Effect test

Embodiment 1

[0024] 10g of nickel-cobalt-manganese ternary lithium ion battery waste was crushed and ground, and then mixed with 6g of brown coal with a carbon content of 45%, and placed in a muffle furnace for reduction roasting. The reduction roasting temperature was controlled to 500°C and the roasting time was 5 hours. The roasted product is placed in water at a solid-liquid ratio of 1:20 for immersion while passing CO 2 , Access to CO 2 The molar amount is 0.65 times the molar amount of lithium in the solution, the immersion temperature is 5° C., the time is 0.5 hours, and the pH is controlled to 8.13. After the immersion, the lithium-containing aqueous solution is filtered, which can be used to prepare lithium carbonate products. The filter residue was added to a 1.5mol / L sulfuric acid solution at a solid-liquid ratio of 1:20, while air was blown into it, and stirred at a constant temperature of 50°C for 5 hours, and filtered to obtain a sulfate solution containing cobalt, nickel, and m...

Embodiment 2

[0026] Simply crush and finely grind the discarded lithium cobalt oxide battery soft pack. The carbon content is measured to be 1.8%. Then 10g battery waste powder is mixed with 1g anthracite with 91% carbon content and placed in a muffle furnace for reduction. For roasting, control the reduction roasting temperature to 500°C, and the roasting time for 3 hours. Weigh the product after reduction and roasting and place it in water according to the solid-liquid ratio of 1:15 for water immersion while introducing CO 2 , Access to CO 2 The molar amount is 4.6 times the molar amount of lithium in the solution, the water immersion temperature is 25° C., the time is 2 hours, and the pH is controlled to 8.56. After the water immersion, a lithium-containing aqueous solution is obtained by filtration, which can be used to prepare lithium carbonate products. The filter residue was added to a 3mol / L sulfuric acid solution at a solid-liquid ratio of 1:10, while oxygen was bubbled in, stirred ...

Embodiment 3

[0028] 10g of lithium manganate battery waste was crushed and ground, and then mixed with 5g of bituminous coal with 75% carbon content, and placed in a muffle furnace for reduction roasting. The reduction roasting temperature was controlled to 750°C and the roasting time was 1 hour. Weigh the product after reduction and roasting, and place it in water at a solid-liquid ratio of 1:10 for water immersion while introducing CO 2 , Access to CO 2 The molar amount is 3.8 times the molar amount of lithium in the solution, the immersion temperature is 30° C., the time is 3 hours, and the pH is controlled to 9.00. After the immersion, the lithium-containing aqueous solution is filtered, which can be used to prepare lithium carbonate products. The filter residue was added to a 4mol / L nitric acid solution according to a solid-liquid ratio of 1:3, and hydrogen peroxide was added at the same time, and stirred at a constant temperature of 20°C for 10 hours, and filtered to obtain a nickel-con...

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Abstract

The invention discloses a method for comprehensively recovering valuable metals from a waste lithium-ion battery material. The method is characterized by comprising the steps of mixing a waste lithium-ion battery positive electrode material with a reducing agent, or mixing simply crushed whole battery with a carbon reducing agent; carrying out reducing roasting treatment at the temperature of 500-750 DEG C; firstly carbonizing and leaching a roasted product through CO2 to obtain a lithium bicarbonate water solution for preparing an Li2CO3 product; and leaching valuable elements of cobalt, nickel, manganese and the like from liquid leached residues through oxidation acid leaching or oxidation ammonia leaching, carrying out extracting and purifying and then preparing the corresponding compound product. The method is simple in technology and short in flow; the reagent cost is low; and valuable metal elements of lithium, the cobalt, the nickel, the manganese and the like in the waste lithium-ion battery material can be efficiently recovered.

Description

Technical field [0001] The invention relates to a method for processing waste lithium ion batteries, in particular to a smelting method for comprehensively recovering valuable elements such as lithium, nickel and cobalt from waste lithium ion battery materials. It belongs to the field of electronic waste recycling and treatment and resource utilization. Background technique [0002] In recent years, under the background of the era of environmental protection, my country's new energy vehicles have seen rapid growth. With the continuous improvement of production capacity, the number of used lithium-ion batteries is increasing, and the resource shortage and environmental problems caused by this are becoming increasingly severe. Therefore, it is of great practical significance to develop a clean and efficient method for disposing of used lithium-ion batteries so that the valuable metals can be fully recycled. [0003] At present, most of the domestic waste lithium-ion batteries adopt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B7/00C22B23/00C22B47/00
CPCC22B7/001C22B7/006C22B23/02C22B23/0407C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 张家靓胡军涛
Owner GUANGDONG GUANGHUA SCI TECH
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