is then stripped of copper via a solvent extraction and electrowinning process, which is more economical compared to froth flotation. All copper mines have different mineral assemblages.

More information: B. Ben Said et al, Nanoparticle depressants in froth flotation – The effect of colloidal silica with ...

The slurry, which continues to pour into the valley today, is a result of "froth flotation," a process used by Rosia Poieni and most other copper mines around the world. Rock rich in copper is ...