Process for recovery of metal values from lead-zinc ores, even those having a high carbonate content
US4272341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1980 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | Jan 9, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A chemical, electro-chemical process for recovering meta values from a zinc- or lead-containing material comprises: PA0 in a solubilization stage, oxidizing the zinc- or lead-containing material by treating said material with a ferric chloride leach solution; PA0 when solubilized lead is present, separating it from the pregnant liquor forming an essentially lead free solution; PA0 dividing this essentially lead free solution into two portions; PA0 passing one portion of the essentially lead free solution into the anolyte compartment of a Zn.degree. producing electrolysis stage for use as the ferrous ion-containing anolyte thereof; PA0 separating iron from the second portion of the essentially lead free solution, forming an essentially iron free solution; PA0 passing the essentially iron free solution into the catholyte compartment of said Zn.degree. producing electrolysis stage for use as the catholyte thereof; PA0 conducting electrolysis in said Zn.degree. producing electrolysis stage, thereby regenerating ferric chloride leach solution in the anolyte by oxidizing ferrous ions to ferric ions, and reducing zinc ions in the catholyte to Zn.degree.; and PA0 recovering the Zn.degree. …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.