Ore flotation process and use of mixed hydrocarbyl dithiophosphoric acids and salts thereof
US4879022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D2203/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for beneficiating an ore containing sulfide materials with selective rejection of pyrite, pyrrhotite and other metals and gangue. In particular, the process is useful for beneficiating ores and recovering copper from said ores. In one embodiment the process comprises the steps of PA0 (A) grinding the ore to an appropriate size range; PA0 (B) preparing a slurry comprising PA1 (B-1) said ground ore; PA1 (B-2) at least one collector which is a water-dispersible or soluble dihydrocarbyldithiodiphosphoric acid or salt having the formula ##STR1## wherein R.sup.1 and R.sup.2 are different hydrocarbyl groups containing up to about 12 carbon atoms, n is an integer equal to the valence of X and X.sup.n+ is a dissociating cation; and PA1 (B-3) water; PA0 (C) conditioning the slurry with SO.sub.2 under aeration at a pH of about 5.5 to about 7.5; PA0 (D) subjecting the conditioned slurry to froth flotation to produce a froth containing a metal rougher concentrate; PA0 (E) collecting said froth; and p0 (F) recovering the metal rougher concentrate containing the desired metal values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.