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A common treatment method for low-cobalt and high-manganese waste materials and waste lithium battery cathode materials

A technology for waste lithium batteries and cathode materials, which is applied in the field of regeneration of cathode materials of nickel-cobalt-manganese ternary lithium batteries, can solve the problems of high cost and complicated process.

Active Publication Date: 2020-10-30
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These existing methods are complex and costly

Method used

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  • A common treatment method for low-cobalt and high-manganese waste materials and waste lithium battery cathode materials
  • A common treatment method for low-cobalt and high-manganese waste materials and waste lithium battery cathode materials

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Embodiment 1

[0025] refer to figure 1 , figure 1 It shows a process flow chart of co-processing low-cobalt high-manganese waste materials and waste lithium battery cathode materials according to an embodiment of the present invention.

[0026] Mix the low-cobalt and high-manganese waste with the positive electrode material of the waste lithium battery, ball mill it for 0.5h, and then use acid and reducing agent to leach to obtain the first mixed solution, wherein the acid used is sulfuric acid, the reducing agent is hydrogen peroxide, and the leaching temperature is 45°C. The leaching time is 0.5 h, the acid concentration is 0.5 mol / L; the first mixed solution is heated in a water bath and suction filtered to obtain the second mixed solution, and sodium hydroxide solution is added to the second mixed solution to adjust the pH to 4 to obtain crude hydrogen Iron oxide precipitation and the third mixed solution, wherein the temperature of the water bath heating is 50°C, and the heating time ...

Embodiment 2

[0029] Mix the low-cobalt and high-manganese waste material with the positive electrode material of the waste lithium battery, ball mill it for 1 hour, and then use acid and reducing agent to leaching to obtain the first mixed solution, wherein the acid used is nitric acid, the reducing agent is ascorbic acid, the leaching temperature is 65°C, and the leaching The time is 2.5 hours, the acid concentration is 2mol / L; the first mixed solution is heated in a water bath and suction filtered to obtain the second mixed solution, and sodium hydroxide solution is added to the second mixed solution to adjust the pH to 4.5 to obtain crude ferric hydroxide Precipitation and the third mixed solution, wherein the temperature of the water bath heating is 70°C, and the heating time is 3h; add manganese, nickel, cobalt nitrate solution to the third mixed solution to adjust the ion ratio, so that the nickel, cobalt, and manganese ion moles The concentration ratio is 1:1:1, adding ammonia water ...

Embodiment 3

[0031] Mix the low-cobalt and high-manganese waste with the positive electrode material of the waste lithium battery, ball mill for 2 hours, and then use acid and reducing agent to leaching to obtain the first mixed solution, wherein the acid used is hydrochloric acid, the reducing agent is glucose, the leaching temperature is 95°C, and the leaching The time is 5 hours, the acid concentration is 4mol / L; the first mixed solution is heated in a water bath and suction filtered to obtain the second mixed solution, and sodium hydroxide solution is added to the second mixed solution to adjust the pH to 5 to obtain crude ferric hydroxide precipitate And the third mixed solution, wherein the temperature of the water bath heating is 90 ℃, and the heating time is 3h; Add the chloride salt solution of manganese, nickel, cobalt to the third mixed solution to adjust the ion ratio, so that the nickel, cobalt, manganese ion moles The concentration ratio is 1:1:1, add ammonia water and continu...

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Abstract

The invention discloses a joint treatment method of low-cobalt and high-manganese waste materials and waste lithium battery cathode materials. After mixing the low-cobalt and high-manganese waste materials and waste lithium battery cathode materials, the particle size is reduced by ball milling, and acid and reducing agent are used Leaching to obtain a first mixed solution; heating the first mixed solution in a water bath and suction filtering to obtain a second mixed solution; adding an alkali solution to the second mixed solution to adjust the pH to obtain a crude ferric hydroxide precipitate and a third mixed solution; Add manganese, nickel and cobalt solutions to the third mixed solution to adjust the ion ratio, add ammonia water and continue to add alkali solution to adjust the pH, and obtain mixed hydroxide precipitates of manganese, nickel and cobalt. The present invention adopts the wet method to recover the valuable metals in low-cobalt and high-manganese waste materials and waste lithium battery positive electrode materials, and jointly processes the two wastes, avoiding the complicated separation and recovery of nickel, cobalt, manganese, lithium, iron and other elements process, the present invention has simple process, low cost and high recovery rate of valuable metals.

Description

technical field [0001] The invention relates to the field of regeneration of positive electrode materials of nickel-cobalt-manganese ternary lithium batteries, in particular to a joint treatment method of low-cobalt and high-manganese waste materials and waste lithium battery positive electrode materials. Background technique [0002] Cobalt, manganese, nickel, lithium and other metal elements are widely used in alloys, battery materials, catalysts and many other fields. In particular, cobalt is an important strategic metal, but my country's cobalt mineral resources are seriously lacking, and the consumption of cobalt is increasing year by year. Most of the cobalt raw materials depend on imports. The waste cobalt-manganese catalyst in the PTA production process contains a large amount of cobalt and manganese elements, wherein the cobalt content is about 10%, and the manganese content is about 20%. The content of cobalt, nickel, manganese and lithium in the positive electrod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/54Y02E60/10Y02W30/84
Inventor 刘维桥邹超刘欢刘玉潘君丽周全法
Owner JIANGSU UNIV OF TECH
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