Recovering copper from chalcopyrite concentrate
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United States of America Patent
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Mar 17, 1981
Grant Date -
N/A
app pub date -
Jan 23, 1980
filing date -
Jan 23, 1980
priority date (Note) -
Expired
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Abstract
A process and system are provided for recovering copper from chalcopyrite concentrate. The chalcopyrite is ground to a mean particle size of about 1.5-5 microns. The ground chalcopyrite is then divided into a first stream and a second stream. The first stream is leached in a leach solution containing at least about 100 gpl sulfuric acid and about 10-30 gpl ferric iron to produce a copper sulfate solution containing about 40-75 gpl dissolved copper and less than about 5 gpl ferric iron. The second stream of ground chalcopyrite is combined with the copper sulfate solution and with sulfur dioxide such that the combination reacts to precipitate dissolved copper from the copper sulfate solution as simple copper sulfides and to produce a liquor containing dissolved ferrous iron. The simple copper sulfides are then separated from the ferrous iron liquor. Sulfuric acid is added to the ferrous iron liquor to precipitate the ferrous iron as ferrous sulfate and the produce a recycle solution containing about 400-600 gpl sulfuric acid. The recycle solution is added to the leach solution. Copper is recovered from the simple copper sulfides.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- BAKER HUGHES INCORPORATED
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Baczek, Frank A | Sandy, UT | 5 | 48 |
Jueschke, Alexander A | Salt Lake City, UT | 3 | 31 |
Lewis, Daniel M | Salt Lake City, UT | 7 | 49 |
Otto, Jack C | Magma, UT | 3 | 31 |
Tuttle, Lawrence L | Sandy, UT | 4 | 33 |
Wojcik, Bruce C | Kearns, UT | 4 | 41 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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