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A method and system for comprehensively recovering valuable metals from waste ternary lithium batteries

A ternary lithium battery and valuable metal technology, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve problems such as bacterial culture, harsh use conditions, complex operation of ion exchange method, and restrictions on the application and promotion of technology , to achieve the effect of eliminating the use of organic extractants, high product purity, and improving product purity

Active Publication Date: 2020-04-14
青海中科德方能源科技研究有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Other methods such as ion exchange method, sulfide bacteria leaching, etc. have successfully recovered valuable metal elements, but these methods have certain limitations, such as ion exchange method is more complicated to operate, the steps are more cumbersome, and it is only suitable for the separation and purification of a small amount of ions ; Bacteria culture, harsh conditions of use, and difficulty in industrialization of sulfide bacteria leaching technology have restricted the application and promotion of the technology

Method used

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  • A method and system for comprehensively recovering valuable metals from waste ternary lithium batteries
  • A method and system for comprehensively recovering valuable metals from waste ternary lithium batteries
  • A method and system for comprehensively recovering valuable metals from waste ternary lithium batteries

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Embodiment 1

[0086] A certain type of waste ternary lithium battery is used as raw material. First, the waste batteries are discharged, disassembled and screened to obtain waste ternary cathode materials. Weigh 1 kg of waste ternary cathode material and treat it in a muffle furnace at 500 °C for 1 h, remove the binder, quench with water and treat in ultrasonic vibration for 30 min to peel off the cathode material and the aluminum foil. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 4 mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 80 g / L, the temperature was controlled at 80 °C and continuously stirred for 4 hours, and then the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-insoluble substances such as carbon powder...

Embodiment 2

[0094] The ternary lithium cathode scrap of a certain enterprise is used as the raw material. Weigh 500 g of waste ternary positive electrode scraps and treat them in a muffle furnace at 450°C for 2 h, remove the binder, quench with water and treat in ultrasonic vibration for 60 min to peel off the positive electrode material and the aluminum foil. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 2 mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 95 g / L, the temperature was controlled at 85 °C and continuously stirred for 3 hours, and then the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-insoluble substances such as carbon powder. After testing the chemical composition in the leachate, the results are sh...

Embodiment 3

[0102] A certain type of waste ternary lithium battery is used as raw material. First, the waste batteries are discharged, disassembled and screened to obtain waste ternary cathode materials. Weigh 1.2 kg of waste ternary positive electrode material and treat it in a muffle furnace at 550°C for 2 hours, remove the binder, quench with water and treat in ultrasonic vibration for 45 minutes to peel off the positive electrode material and the aluminum foil. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black finely crushed slag was treated with 3 mol / L hydrochloric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 75 g / L, the temperature was controlled at 85 °C and continuously stirred for 6 h, and then the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-i...

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Abstract

The invention discloses a method and system for comprehensively recycling valuable metal from a waste ternary lithium battery. The method comprises the following steps: dismounting a positive electrode sheet from the waste ternary lithium battery; removing an adhesive in the positive electrode sheet and then leaching a valuable metal element in the positive electrode sheet through acid to obtain an acidified leaching solution; carrying out ultrafiltration treatment on the acidified leaching solution by utilizing the acidified leaching solution; separating lithium ions in the acidified leachingsolution and other cations which are different from the lithium ions, so as to obtain a lithium-containing solution and a solution containing other cations; concentrating and enriching by adopting areverse osmosis technology; concentrating and enriching respectively by adopting the reverse osmosis technology; precipitating and separating the lithium ions in the lithium-containing solution by adopting a lithium precipitating agent; and precipitating and separating out nickel ions, cobalt ions and manganese ions in the solution containing the other cations by adopting an alkaline substance, soas to recycle the valuable metal. The method adopts an ultrafiltration-nanofiltration-reverse osmosis combined technology is adopted and has the characteristics of simple and environment-friendly technology, small acid and alkali dosage, good membrane separation effect, stability and the like.

Description

technical field [0001] The invention relates to a method and a corresponding system for comprehensively recovering valuable metals from waste ternary lithium batteries, belonging to the technical field of lithium battery recovery. Background technique [0002] Lithium and its compounds are strategic materials of great significance in the national economy and national defense construction, as well as new green energy materials closely related to people's lives. As a new type of chemical power source, lithium-ion batteries have become the main energy source for 3C electronic products, occupying more than 80% of the consumer electronics market. In recent years, the continuous progress of lithium battery technology and the improvement of energy density have greatly increased the demand in the field of new energy vehicles and energy storage power sources, which has led to a significant year-on-year increase in the production and sales of lithium-ion batteries. In 2016, the outpu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/00C22B26/12C22B47/00H01M10/54
CPCC22B23/0407C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 彭正军王敏祝增虎王怀有赵有璟贾国凤李积升
Owner 青海中科德方能源科技研究有限公司
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