Method for leaching positive-negative pole material mixture of waste nickel-metal hydride battery
A technology for nickel-metal hydride waste batteries and mixed materials, which is applied in the direction of improving process efficiency, can solve the problems of uneconomical self-use of industrial pure oxygen, complicated leaching equipment, and small amount of industrial pure oxygen, etc., and achieve obvious economic and environmental benefits. , the effect of reducing pollution control costs and improving metal leaching rate
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0022] Example 1: Add 100g of the positive and negative mixed materials of nickel-metal hydride waste batteries (containing 55.3% nickel, 6.2% cobalt, and 12.5% rare earth) and 37g wheatgrass powder ≤ 1.5mm into a titanium-lined pressure reaction with a volume of 2L. Add 870ml of mixed acid solution with a concentration of sulfuric acid of 1.5mol / L and a concentration of nitric acid of 5g / L into the kettle, leaching at 50°C to 60°C with closed stirring (stirring speed 80r / min) for 4 hours, and liquid-solid separation after leaching. Obtain 840ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt and rare earths are 99.1%, 98.4% and 8.7% respectively (calculated based on nickel, cobalt and rare earths entering the leaching solution and leaching slag washing solution).
Embodiment 2
[0023] Example 2: 500g of mixed positive and negative electrode materials of waste nickel-metal hydride batteries (containing 55.3% nickel, 6.2% cobalt, and 12.5% rare earth) and 230g ≤ 1.5mm wheat straw powder were added to a titanium-lined pressure reaction with a volume of 5L after roasting pretreatment Add 2700ml of mixed acid solution with a concentration of sulfuric acid of 3.0mol / L and a concentration of nitric acid of 10g / L in the kettle, and leaching at 70°C to 80°C (stirring speed 70r / min) for 2.0h, and liquid-solid separation after leaching , to obtain 2400ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt and rare earths are 99.2%, 99.2% and 7.8% respectively (calculated based on nickel, cobalt and rare earths entering the leaching solution and leaching slag washing solution).
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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