Method for reclaiming valuable metals from waste lithium batteries

A technology for waste lithium batteries and valuable metals, which is applied in the field of recycling valuable metals from waste lithium batteries, can solve problems such as waste of resources, potential safety hazards, and environmental pollution, and achieve high recycling efficiency, simple methods, and low recycling costs Effect

Active Publication Date: 2010-12-22
深圳前海吉祥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these tons of lithium-ion batteries are scrapped, if they are not handled properly, they will cause serious safety hazards and environmental pollution, and will also cause a great waste of resources. With the positive development of society and people's increasing emphasis on environmental protection, The recycling of waste lithium-ion batteries will become a very urgent problem
[0003] Lithium-ion batteries contain a variety of precious metals with recycling value, such as cobalt, copper, lithium, aluminum, etc. Therefore, recycling lithium-ion batteries has great economic value, but there is no simple and efficient recycling method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The discharged waste lithium battery is mechanically pulverized, and calcined at a high temperature of 350°C-400°C to obtain a material containing cobalt, copper and aluminum, adding a 10% sodium hydroxide solution, reacting for 2 hours, filtering the lye, washing, Dried to obtain the material containing cobalt, copper, adding concentration to the material containing cobalt, copper is the sulfuric acid of 3.5 mol / L and 0.4 mol / L Na 2 the s 2 o 3， Stir to dissolve, adjust the pH value to 1.0, extract copper with an extractant containing 10% Acorga M5640, adjust the pH value of the solution after extracting copper to 5.0-5.5, and extract cobalt with an organic extractant containing 15% Cyanex272. Among them, dilute sulfuric acid is added to the filtered lye to adjust the pH to 8.5-9.0, aged and precipitated at 90-100° C. for 30-40 minutes, and filtered to obtain aluminum hydroxide crystals.

Embodiment 2

[0020] The discharged waste lithium battery is mechanically pulverized, and calcined at a high temperature of 350°C-400°C to obtain a material containing cobalt, copper and aluminum, adding a 10% sodium hydroxide solution, reacting for 2 hours, filtering the lye, washing, Dried to obtain the material containing cobalt and copper, adding concentration to the material containing cobalt and copper is 4.0mol / L sulfuric acid and 0.35mol / L Na 2 the s 2 o 3， Stir to dissolve, adjust the pH value to 1.0, extract copper with an extractant containing 15% Acorga M5640, adjust the pH value of the solution after extracting copper to 5.0-5.5, and extract cobalt with an organic extractant containing 120% Cyanex272. Among them, dilute sulfuric acid is added to the filtered lye to adjust the pH to 8.5-9.0, aged and precipitated at 90-100° C. for 30-40 minutes, and filtered to obtain aluminum hydroxide crystals.

Embodiment 3

[0022] The discharged waste lithium battery is mechanically crushed, and calcined at a high temperature of 350°C-400°C to obtain a material containing cobalt, copper and aluminum, adding a 15% sodium hydroxide solution, reacting for 2 hours, filtering the lye, washing, Dry to obtain the material containing cobalt and copper, and add the sulfuric acid and 0.4mol / L Na with a concentration of 4.0mol / L to the material containing cobalt and copper 2 the s 2 o 3， Stir to dissolve, adjust the pH value to 1.0, extract copper with an extractant containing 12% Acorga M5640, adjust the pH value of the solution after extracting copper to 5.0-5.5, and extract cobalt with an organic extractant containing 16% Cyanex272. Among them, dilute sulfuric acid is added to the filtered lye to adjust the pH to 8.5-9.0, aged and precipitated at 90-100° C. for 30-40 minutes, and filtered to obtain aluminum hydroxide crystals.

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PUM

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Abstract

The invention discloses a method for reclaiming valuable metals from waste lithium batteries, which comprises the following steps of: crushing discharged waste lithium batteries, calcining at the high temperature of 350-400 DEG C to obtain a material containing cobalt, copper and aluminum, adding 5-10% sodium hydroxide solution to the material, making the sodium hydroxide solution react with the material for 2-3 hours, filtering alkaline liquor, washing and drying to obtain a material containing cobalt and copper; adding sulfuric acid with a certain concentration and Na2S2O3 to the material containing cobalt and copper, mixing, dissolving, adding an extractant to extract copper, and adding an extractant to the copper-extracted solution to extract cobalt. The method is simple and effective and has low reclamation cost.

Description

technical field [0001] The invention relates to the recovery and treatment of waste lithium batteries, in particular to a method for recovering valuable metals from waste lithium batteries. Background technique [0002] Lithium-ion batteries have been widely used in portable electronics since their commercialization in the 1990s. However, after a period of use of lithium-ion batteries, the electrode materials will expand and shrink, and even the properties of the active materials will change, resulting in a decrease in battery capacity and even battery scrapping. In recent years, as lithium-ion batteries have become more and more widely used, battery usage has increased rapidly, and the number of scrapped lithium-ion batteries will also increase significantly year by year. When these tons of lithium-ion batteries are scrapped, if they are not handled properly, they will cause serious safety hazards and environmental pollution, and will also cause a great waste of resources....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B23/00C22B21/00
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 张永祥
Owner 深圳前海吉祥环保科技有限公司
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