A method for recovering valuable metals from waste ternary lithium ion cathode materials

A cathode material and valuable metal technology, applied in the field of metallurgy, can solve the problems of high metal recovery rate, low product purity, large processing capacity by precipitation method, etc., achieve high metal leaching rate, good extraction effect, and promote valuable metal leaching. Effect

Active Publication Date: 2020-11-24
重庆棱镜能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precipitation method has a large processing capacity and a high recovery rate of main metals. Controlling the pH value can realize the separation of metals, which is easy to realize industrialization, but the precipitation method is easily interfered by impurity ions, resulting in low product purity.

Method used

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  • A method for recovering valuable metals from waste ternary lithium ion cathode materials

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Experimental program
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Effect test

Embodiment 1

[0021] Waste ternary lithium ion battery cathode material, its main components are (%): Li 5.31, Ni 28.35, Co10.35, Mn 13.17, Fe 0.26, Al 0.71, Cu 0.05, C 2.11; industrial grade oxygen, of which O 2 Content ≥99.5%; technical grade ammonium chloride, of which NH 4 Cl content ≥ 99.5%; industrial grade ammonia water, of which NH 3 ·H 2 O content is 25-28%; industrial grade hydrazine hydrate, of which N 2 h 4 ·H 2 O content is 80%, industrial grade sodium hydroxide, of which NaOH≥96%; industrial grade hydrochloric acid, of which HCl content is 36-38%; industrial grade Versatic 911, of which Versatic 911 content is ≥99%.

[0022] Weigh 10.00 g of the waste ternary lithium-ion battery powder of the above components, add it to a quartz crucible, place the quartz crucible in a roasting furnace, seal the roasting furnace and start to feed oxygen, control the flow rate of oxygen fed to 500mL / min, normal temperature After passing oxygen for 15 minutes, the roasting furnace began to ...

Embodiment 2

[0026] Waste ternary lithium ion battery powder, its main components are (%): Li 5.13, Ni 28.80, Co 11.40, Mn14.78, Fe 0.21, Al 0.60, Cu 0.03, C 1.81; industrial grade oxygen, of which O 2 Content ≥99.5%; technical grade ammonium chloride, of which NH 4 Cl content ≥ 99.5%; industrial grade ammonia water, of which NH 3 ·H 2 O content is 25-28%; industrial grade hydrazine hydrate, of which N 2 h 4 ·H 2 O content is 80%, industrial grade sodium hydroxide, of which NaOH≥96%; industrial grade hydrochloric acid, of which HCl content is 36-38%; industrial grade Versatic 911, of which Versatic 911 content is ≥99%.

[0027] Weigh 100.00 g of the waste ternary lithium-ion battery powder of the above ingredients, add it to a quartz crucible, place the quartz crucible in a roasting furnace, seal the roasting furnace and start to feed oxygen, control the flow rate of oxygen fed to 500mL / min, normal temperature After passing oxygen for 20 minutes, the roasting furnace began to heat up ...

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Abstract

The invention discloses a method for recovering valuable metals in waste ternary lithium-ion battery powder. Firstly, put the waste ternary lithium-ion battery powder into a well-type furnace fed with oxygen for oxidative roasting to obtain a roasted product. The roasted product The content of medium carbon is reduced by more than 99%, and then the roasted product is dissolved in the ammonia-ammonium chloride solution system, put into the reactor, and hydrazine hydrate with a volume fraction of 1.6% is added as a reducing agent, and the pH value of the obtained leachate is adjusted to 8.00 According to the O / A ratio of 2, it was added to the extractant, wherein the volume fraction of Versatic 911 was 20%, the volume fraction of sulfonated kerosene was 80%, the reaction temperature was controlled at 30°C, and the raffinate was obtained by separation after 5 minutes of reaction And the organic phase, through three-stage countercurrent extraction, the extraction rate of cobalt is more than 98%. The invention uses simple equipment, low investment and operation costs, significantly reduced process energy consumption, and high recovery rate of valuable metals.

Description

technical field [0001] The invention relates to pyrometallurgy and hydrometallurgy processes in the field of metallurgy, in particular to a method for effectively recovering valuable metals in waste ternary lithium ion cathode materials. [0002] technical background [0003] In recent years, with the widespread application of lithium-ion batteries, the number of waste batteries has increased. The main components of lithium-ion batteries include casing, electrolyte, positive electrode material, cathode material, adhesive, copper foil and aluminum foil, etc. The cathode material usually contains valuable metal elements such as Li, Co, Ni, and Mn, among which Co, as a strategic metal, is the most economically beneficial metal element in waste lithium-ion batteries. Therefore, it is of great significance to recover valuable metals from waste ternary lithium-ion battery cathode materials. [0004] At present, the recycling technology of waste ternary lithium-ion battery cathode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B3/32C22B23/00C22B47/00C22B26/12H01M10/54
CPCC22B1/02C22B7/008C22B23/0446C22B26/12C22B47/00C22B3/32H01M10/54Y02W30/84Y02P10/20
Inventor 张杜超杨天足刘伟锋陈霖王豪任冠行
Owner 重庆棱镜能源科技有限公司
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