Method for recovering cadmium from waste nickel-cadmium battery
A waste battery and nickel-cadmium technology, which is applied in the field of waste battery recycling, can solve the problems of complex leaching equipment, long recycling process route, and large equipment investment, and achieve simple recycling methods, low equipment investment, and high economic benefits Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0035] 1) Put 1,000 kg of powder into a dissolution kettle, add 5,000 L of water, 10,000 mol of sulfuric acid, and 6,000 mol of oxidant sodium chlorate, heat up to 50°C, stir and soak for 3 hours, and take the leachate;
[0036] 2) Add waste nickel hydroxide, adjust the pH of the leaching solution to 3.5, remove iron, and separate solid and liquid;
[0037] 3) After the leachate after solid-liquid separation is passed into H 2 S gas to precipitate cadmium element.
[0038] After testing, the recovery rate of cadmium was 99.8%.
Embodiment 2
[0040] 1) Put 1,000 kg of powder into a dissolution kettle, add 3,000 L of water, 10,000 mol of hydrochloric acid, and 10,000 mol of oxidant H 2 o 2 , heated up to 80°C, stirred and soaked for 1 hour, and took the leachate;
[0041] 2) adding sodium hydroxide solution, adjusting the pH of the leaching solution to 5, removing iron, and separating solid and liquid;
[0042] 3) Sodium sulfide is added to the leaching solution after solid-liquid separation to precipitate cadmium element.
[0043] After testing, the recovery rate of cadmium was 99.5%.
Embodiment 3
[0045] 1) Put 1,000 kg of powder into a dissolution kettle, add 4,500 L of water, 7,500 mol of sulfuric acid, and 8,000 mol of oxidant sodium persulfate, heat up to 60°C, stir and soak for 2 hours, and take the leachate;
[0046] 2) adding sodium carbonate, adjusting the pH of the leachate to 3, iron removal, solid-liquid separation;
[0047] 3) After the leachate after solid-liquid separation is passed into H 2 S gas to precipitate cadmium element.
[0048] After testing, the recovery rate of cadmium was 99.9%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| boiling point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More