Selective Oxidation Depression of Copper-Activated Sphalerite by H<sub>2</sub>O<sub>2</sub> During Chalcopyrite Flotation
Using hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), a simple and easily accessible reagent, as a selective depressant, flotation separation experiments of chalcopyrite and copper-activated sphalerite were conducted. The micro-flotation tests of single minerals indicated tha...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/15/7/813 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Using hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), a simple and easily accessible reagent, as a selective depressant, flotation separation experiments of chalcopyrite and copper-activated sphalerite were conducted. The micro-flotation tests of single minerals indicated that H<sub>2</sub>O<sub>2</sub> selectively depresses copper-activated sphalerite and exerted almost no depressant effect on chalcopyrite. In the flotation tests of artificially mixed minerals, a copper concentrate with a grade of 29.95% and a recovery of 87.30% was obtained, while the zinc content was only 5.76%, demonstrating a significant separation effect. The results of contact angle measurement, Zeta potential measurement, surface adsorption analysis, and XPS analysis suggested that H<sub>2</sub>O<sub>2</sub> had a stronger oxidation capacity on the surface of copper-activated sphalerite than chalcopyrite, generating hydrophilic hydroxyl groups on the surface of sphalerite and preventing further adsorption of the collector Z-200 on the surface of sphalerite. |
|---|---|
| ISSN: | 2075-4701 |