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Method for comprehensively recovering valuable metals from waste lithium-ion battery material

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 complex purification and separation procedures and difficulties in lithium recovery, and achieve the effects of low reagent cost, high recovery rate, and high-efficiency recovery

Active Publication Date: 2016-11-16
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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  • Method for comprehensively recovering valuable metals from waste lithium-ion battery material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 10g of nickel-cobalt-manganese ternary lithium-ion battery waste was crushed and ground, then mixed evenly with 6g of lignite with a carbon content of 45%, and placed in a muffle furnace for reduction roasting. The reduction roasting temperature was controlled at 500°C and the roasting time was 5 hours. The roasted product is placed in water at a solid-to-liquid ratio of 1:20 for water immersion while passing CO 2 , the incoming CO 2 The molar amount is 0.65 times of the lithium molar amount in the solution, the water immersion temperature is 5°C, the time is 0.5 hour, the pH is controlled to 8.13, and the lithium-containing aqueous solution is obtained by filtration after water immersion, 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-to-liquid ratio of 1:20, while air was blown in, stirred at a constant temperature of 50°C for 5 hours, and filtered to obtain a sulfate solution conta...

Embodiment 2

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

Embodiment 3

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

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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 treatment method for 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 recycling. Background technique [0002] In recent years, under the background of the era of green and environmental protection, my country's new energy vehicles have experienced rapid growth. With the continuous improvement of production capacity, the number of waste lithium-ion batteries is increasing, and the resulting shortage of resources and environmental problems are becoming more and more serious. Therefore, it is of great practical significance to develop a clean and efficient method for disposing of waste lithium-ion batteries so that the valuable metals can be fully recycled. [0003] At present, most domestic waste lithium-ion batteries are recycle...

Claims

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Application Information

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Patent Type & Authority Applications(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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