Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Leaching method of nickel-cadmium waste battery positive electrode material

A technology for positive electrode materials and waste batteries, which is applied in the field of leaching of nickel-cadmium waste battery positive electrode materials, can solve the problems of industrial pure oxygen storage, transportation and use troubles, industrial pure oxygen is uneconomical for personal use, and the amount of industrial pure oxygen is not large, etc. Achieve obvious economic and environmental benefits, reduce pollution treatment costs, and increase metal leaching rate

Inactive Publication Date: 2014-04-30
SICHUAN NORMAL UNIVERSITY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consumption of nitric acid in the nitric acid leaching method is large, and a large amount of nitrogen oxides will be produced, polluting the environment
All wet processes have the problem of how to economically increase the leaching speed, increase the metal leaching rate, and reduce the consumption of acid and other auxiliary materials.
Although the pure oxygen leaching method in the nitric acid processing industry and the pure oxygen leaching method in the mixed acid processing industry have solved the above problems, the leaching equipment is more complicated, and the amount of industrial pure oxygen required for the leaching of waste batteries is not large, and waste battery treatment enterprises produce on-site Industrial pure oxygen is not economical for personal use, and the storage, transportation and use of industrial pure oxygen are troublesome

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

[0020] Example 1: Add 100 g of the positive electrode material (containing 55.2% nickel, 3.8% cobalt) and 35.5 g reed powder ≤ 1.5 mm into a titanium-lined pressure reactor with a volume of 2 L through roasting pretreatment, and add sulfuric acid concentration 800ml of mixed acid solution with a concentration of 1.5mol / L and a concentration of nitric acid of 5g / L was stirred at 50°C to 60°C (stirring speed 80r / min) for 4 hours, and liquid-solid separation was performed after the leaching was completed to obtain 770ml of leaching solution (without leaching slag washing water). The leaching rates of nickel and cobalt are 99.1% and 99.0% respectively (calculated based on nickel and cobalt entering the leaching solution and leaching slag washing solution).

Embodiment 2

[0021] Example 2: Add 220 g of reed powder ≤ 1.5 mm into a titanium-lined pressure reactor with a volume of 5 L, and add sulfuric acid at a concentration of 3.0 mol / L, nitric acid concentration of 10g / L mixed acid solution 2500 ml, stirred at 70 ℃ ~ 80 ℃ (stirring speed 70r / min) leaching for 2 hours, after leaching, liquid-solid separation was carried out to obtain 2300 ml leaching solution (without leaching slag washing water). The leaching rates of nickel and cobalt are 99.4% and 99.1% respectively (calculated based on nickel and cobalt entering the leaching solution and leaching slag washing solution).

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 provides a leaching method of a nickel-cadmium waste battery positive electrode material, which comprises the following steps: adding a positive electrode material subjected to roasting pretreatment separated from nickel-cadmium waste batteries and reed powder into a pressure-resistant sulfuric-acid / nitric-acid-corrosion-resistant reaction kettle, adding a sulfuric acid-nitric acid mixed solution, and carrying out agitation leaching under sealed conditions.

Description

technical field [0001] The invention relates to a method for leaching the positive electrode material of nickel-cadmium waste batteries. Background technique [0002] Nickel-cadmium batteries are a type of widely used batteries, and a large amount of waste batteries will be produced after the batteries are scrapped. Because this type of battery contains a large amount of heavy metals, if it is discarded into the environment, it will cause great direct and potential harm to the environment. The positive electrode material of nickel-cadmium waste batteries mainly contains nickel and cobalt, and the total content of the two is as high as about 60%, which is very valuable for recycling. At present, the processes for recovering nickel and cobalt from the positive electrode materials of nickel-cadmium batteries mainly include fire process and wet process. The products obtained by the fire process are alloy materials, and it is difficult to obtain relatively pure nickel and cobal...

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): C22B7/00C22B23/00
CPCY02P10/20
Inventor 龙炳清万旭陈俊
Owner SICHUAN NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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