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US 2012/0266723 A1Published application
Processing copper sulfide ores
AssigneeUniversity of Education
InventorsIffat Tahira Siddique, Izhar Ul Haq Khan
Life of this patent
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Abstract
Copper is chemically extracted from crude ores by first roasting it at temperature up to 500° C. for 90 minutes, then treating it with ammonium salt followed by leaching with sulfuric acid to obtain a soluble copper mass for further purification.
Claims5
A method for extracting copper from crude copper ore comprising:
- Reducing said crude copper to a size ranging from 50-200 microns Adding to above said crude copper aluminum chloride equal in quantity to about 1/20 to ⅕ of the quantity of said crude ore;
- Roasting above mixture at 450-600° C. for 80-100 minutes;
- Cooling down above mixture to room temperature;
- Adding above mixture to a 0.25 to 3% sulfuric acid solution in a ratio of one part above mixture to five parts of said sulfuric acid solution;
- Allowing above slurry to stand to leach for a period of 0.1-3 hours;
- Decanting the solution above slurry;
- Filtering said decanted solution;
- Drying said filtered decanted solution to crystallize copper.
5 more elements
Dependencies are inferred from the claim text.