Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method of improving flotation separation effect of waste lithium batteries by gamma-ray irradiation

A waste lithium battery, gamma ray technology, applied in the field of solid waste recycling, can solve the problems of high viscosity of organic solvents, increase the difficulty of solid-liquid separation, secondary pollution, etc., achieve simple operation, large-scale application, easy The effect of large-scale application

Active Publication Date: 2018-10-23
杭州微净科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the degradation of the passive film by Fenton's reagent is limited to the part exposed on the particle surface
The passivation film can be dissolved by organic solvents, but the viscosity of organic solvents is relatively high, which increases the difficulty of subsequent solid-liquid separation
Secondary pollutants will be produced during heat treatment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Under the condition of normal temperature and pressure, put the waste lithium battery electrode material in the atmosphere of 60Coγ radiation source, and then irradiate it for 15h under the condition of radiation dose rate of 0.5kGy / h. After irradiation, the lithium cobalt oxide and The graphite contact angle difference increases by 40°, and the recovery rate of cobalt through flotation reaches 95%.

Embodiment 2

[0013] Under the condition of normal temperature and pressure, put the waste lithium battery electrode material in the atmosphere of 60Coγ radiation source, and then irradiate it for 5h under the condition of radiation dose rate of 50kGy / h, the lithium cobaltate and graphite in the electrode material after irradiation The contact angle difference increased by 30°, and the recovery rate of cobalt by flotation reached 85%.

Embodiment 3

[0015] Under the condition of normal temperature and pressure, put the waste lithium battery electrode material in the atmosphere of 60Coγ radiation source, and then irradiate it for 13h under the condition of radiation dose rate of 10kGy / h. The contact angle difference increased by 32°, and the recovery rate of cobalt by flotation reached 88%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method of improving flotation separation effect of waste lithium batteries by gamma-ray irradiation. The method can solve the problems that during a mechanical and physical recovery process of waste lithium batteries, natural floatability is passivated since the surfaces of electrode materials are coated with organic passivating film and lithium cobalt oxide and graphiteare difficult to separate through flotation. The method mainly includes steps of: under normal temperature and pressure, placing a waste lithium battery electrode material in Co[60] gamma radioactivesource atmosphere, and irradiating the electrode material under the irradiation dose rate of 0.5-50 kGy / h for 1.5-15 h. After irradiation, the difference value between contact values of the lithium cobalt oxide and graphite in the electrode material is increased by 30-40 degrees, so that through the flotation, recovery rate of cobalt can reach 85-95%. The method has simple operation, is high in processing efficiency, is free of secondary pollution and is suitable for large-scale application.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, in particular to a method for improving the flotation and separation effect of waste lithium batteries by gamma ray irradiation. Background technique [0002] The rapid development of new energy vehicles has brought unprecedented development opportunities to the lithium battery industry. In 2015, the output of lithium batteries in my country was 5.60 billion. In 2017 and 2021, the output of lithium batteries will reach 7.35 billion and 9.70 billion respectively. At the same time, due to the limited life cycle of products and the accelerated replacement, the number of scrapped lithium batteries is also increasing day by day. In 2015, the cumulative amount of power lithium batteries scrapped in my country was 20,000 to 40,000 tons, and in 2020, the cumulative amount of scrapped power lithium batteries for pure electric and hybrid passenger vehicles will reach 120,000 to 170,000 tons....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M10/54C22B3/00C22B7/00
CPCC22B7/006C22B23/04H01M10/54Y02P10/20Y02W30/84
Inventor 姚志通苏卫平唐俊红吴卫红
Owner 杭州微净科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com