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US 2014/0369906 A1Published application
Enrichment of metal sulfide ores by oxidant assisted froth flotation
AssigneeEvonik Degussa GmbH
InventorsGerhard Arnold, Terry Brown, Ingo Hamann, Alan Hitchiner
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Abstract
The present invention is directed to methods that can be used in the enrichment of metal sulfide ores in desired minerals in cases where the ores have sulfide-containing gangues. The method involves adding an oxidant to slurries prepared from the ores during, or immediately prior to froth flotation.
Claims27
1-34. (canceled)
A process for treating a metal sulfide ore to separate a desired mineral from a sulfide-containing gangue, comprising:
- a) forming a pulp by suspending the ore in water and milling said ore;
- and
- b) enriching the pulp in said desired mineral by froth flotation, wherein oxidant is added to said pulp immediately prior to, or during, the bubbling of oxygen or air into said pulp.
In a process for treating a metal sulfide ore to separate a desired mineral from a sulfide-containing gangue by:
- a) forming a pulp by suspending the ore in water and milling the ore;
- and
- b) adding hydrogen peroxide to said pulp and enriching the pulp in said desired mineral by froth flotation;
- the improvement comprising adding an aqueous hydrogen peroxide solution comprising 0.5-20% hydrogen peroxide by weight to said pulp during or immediately before froth flotation.
1 more element
Dependencies are inferred from the claim text.