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Method for recovering valuable metals in waste ternary lithium ion battery cathode material

A lithium-ion battery and positive electrode material technology, applied in the field of metallurgy, can solve the problems of long leaching time and low leaching rate, and achieve the effects of low corrosion, increased leaching rate, and simple process flow

Active Publication Date: 2019-07-19
浙江微通催化新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the leaching rate of valuable metals in the ammonia system is low, and the leaching rate of cobalt is 80.7%.
And the leaching time is longer

Method used

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  • Method for recovering valuable metals in waste ternary lithium ion battery cathode material
  • Method for recovering valuable metals in waste ternary lithium ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Waste ternary lithium ion battery cathode material, its main components are (%): Li 5.20, Ni 28.83, Co11.40, Mn 14.67, Fe 0.13, Al 0.51, Cu 0.03, C 1.09; industrial grade oxygen, of which O 2 Content ≥ 99.5%; technical grade ammonium sulfate, of which (NH 4 ) 2 SO 4 Content ≥99%; industrial grade ammonia, of which NH 3 ·H 2 O content is 25-28%; industrial grade hydrazine hydrate, of which N 2 h 4 ·H 2 The O content is 80%.

[0019] Weigh 10.00 g of the waste ternary lithium-ion battery positive electrode material of the above-mentioned composition, add it to a quartz crucible, place the quartz crucible in a tube furnace, seal the tube furnace and start to feed oxygen, and control the flow rate of oxygen to be 300mL / min, after passing oxygen at room temperature for 10 minutes, the tube furnace began to heat up to 700°C, and after reacting for 60 minutes, it was cooled and lowered. The main components are recorded as (%) by weight percentage: Li 5.31, Ni 29.47, C...

Embodiment 2

[0022] Waste ternary lithium ion battery cathode material, its main components are (%): Li 5.31, Ni 28.84, Co11.35, Mn 14.68, Fe 0.13, Al 0.51, Cu 0.04, C 1.21; industrial grade oxygen, of which O 2 Content ≥ 99.5%; technical grade ammonium sulfate, of which (NH 4 ) 2 SO 4 Content ≥99%; industrial grade ammonia, of which NH 3 ·H 2 O content is 25-28%; industrial grade hydrazine hydrate, of which N 2 h 4 ·H 2 The O content is 80%.

[0023] Weigh 100.00 g of the waste ternary lithium-ion battery positive electrode material of the above-mentioned composition, add it to a quartz crucible, place the quartz crucible in a tube furnace, seal the tube furnace and start to feed oxygen, and control the flow rate of oxygen to be 200mL / min, after passing oxygen at room temperature for 25 minutes, the temperature of the tube furnace was raised to 750°C, and after 50 minutes of reaction, the temperature was cooled down. The main components are recorded as (%) by weight percentage: L...

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Abstract

The invention provides a method for recovering valuable metals in waste ternary lithium ion battery cathode material. The method comprises the following steps of putting the raw materials into a tubular furnace fed with oxygen for medium-temperature oxidation roasting, the roasting temperature controlled during medium-temperature oxidation roasting is 700 degrees celsius, and the roasting time is60 min, then a roasted product is obtained, and the content of carbon in the roasted product is reduced by more than 98%; Then, dissolving the roasted product in an ammonia-ammonium salt system with an ammonia concentration of 5mol / L, then putting into a high-pressure kettle, hydrazine hydrate is added to serve as a reducing agent, and reacting for 120min in the high-pressure kettle. According tothe method for recovering valuable metals in waste ternary lithium ion battery cathode material, the equipment used is simple, the investment operation cost is low, the popularization is easy, the process energy consumption is remarkably reduced, the valuable metal recovery rate is high, and the leaching rates of Li, Ni, Co and Mn in the battery powder reach 99.79%, 91.86%, 90.54% and 92.96% respectively.

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 and old ternary lithium ion battery cathode materials. [0002] technical background [0003] Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, separators, electrolytes and outer packaging. The main component of the cathode material of ternary lithium-ion batteries currently on the market is usually LiNi x co y mn 1-x-y o 2 etc. These batteries often need to be crushed and screened after reaching the end of their service life. During this process, battery powder containing nickel, cobalt, manganese, lithium, and a small amount of valuable elements such as aluminum, copper, and iron will be obtained. Due to the rich metal resources contained in it, it is of great significance to recycle the resources of waste lithium-ion batteries. [0004]...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B3/14
CPCC22B1/005C22B1/02C22B7/008Y02P10/20
Inventor 谢智平潘剑明马银标杨立强魏青王豪
Owner 浙江微通催化新材料有限公司
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