CA2043654A1 - Process for leaching of precious metals - Google Patents
Process for leaching of precious metalsInfo
- Publication number
- CA2043654A1 CA2043654A1 CA002043654A CA2043654A CA2043654A1 CA 2043654 A1 CA2043654 A1 CA 2043654A1 CA 002043654 A CA002043654 A CA 002043654A CA 2043654 A CA2043654 A CA 2043654A CA 2043654 A1 CA2043654 A1 CA 2043654A1
- Authority
- CA
- Canada
- Prior art keywords
- leaching
- peroxoborate
- ore
- gold
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002386 leaching Methods 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 5
- 239000010970 precious metal Substances 0.000 title abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- 239000012141 concentrate Substances 0.000 abstract 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052737 gold Inorganic materials 0.000 abstract 2
- 239000010931 gold Substances 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000004343 Calcium peroxide Substances 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 abstract 1
- 235000019402 calcium peroxide Nutrition 0.000 abstract 1
- 125000004093 cyano group Chemical group *C#N 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A process is disclosed for the leaching of gold and silver from ores and ore concentrates through intimate contact of the ore or ore concentrate with an aqueous leach solution containing cyanide. The leach solution has a pH of 8 to 13. The leaching process takes place in the presence of an oxygen-releasing peroxo compound. The separation of the formed cyano complexes of gold and silver takes place in a known manner. During leaching, at least one peroxoborate compound is present, in an effective quantity, as the peroxo compound. The peroxoborate is preferably a sodium or calcium peroxoborate. Compared to previously known leaching techniques in the presence of hydrogen peroxide or calcium peroxide, the leaching process according to the present invention provides a higher and/or faster precious metal yield and/or minimizes the consumption of cyanide and/or oxidizing agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4017899.4 | 1990-06-02 | ||
| DE4017899A DE4017899C1 (en) | 1990-06-02 | 1990-06-02 | Extn. of silver and gold from ores - by contacting ore with aq. leaching soln. contg. cyanide in presence of peroxo:borate, and sepg. cyano complexes formed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2043654A1 true CA2043654A1 (en) | 1991-12-03 |
| CA2043654C CA2043654C (en) | 2003-01-14 |
Family
ID=6407765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002043654A Expired - Fee Related CA2043654C (en) | 1990-06-02 | 1991-05-31 | Process for leaching of precious metals |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU633203B2 (en) |
| BR (1) | BR9101609A (en) |
| CA (1) | CA2043654C (en) |
| DE (1) | DE4017899C1 (en) |
| ZA (1) | ZA912798B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5336474A (en) * | 1990-06-02 | 1994-08-09 | Degussa Aktiengesellschaft | Process for leaching of precious metals |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4114514A1 (en) * | 1991-05-03 | 1992-11-05 | Degussa | METHOD FOR THE LOWING OF GOLD AND SILVER |
| DE19829274C2 (en) * | 1998-07-01 | 2002-06-20 | Otb Oberflaechentechnik Berlin | Process for the recovery of precious metals |
| CN106350670A (en) * | 2016-08-24 | 2017-01-25 | 铜仁市万山区盛和矿业有限责任公司 | Treatment process of pyrrhotite |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827687A (en) * | 1971-04-21 | 1974-08-06 | Minolta Camera Kk | Device for supporting sensitive paper cassette for electrophotography copier |
| DE3637082C1 (en) * | 1986-10-31 | 1988-05-19 | Degussa | Process for leaching precious metals from ores or ore concentrates using cyanide solutions with the addition of hydrogen peroxide |
| DE3801741C1 (en) * | 1988-01-22 | 1989-06-15 | Degussa Ag, 6000 Frankfurt, De | |
| DE3830703C1 (en) * | 1988-09-09 | 1990-03-22 | Degussa Ag, 6000 Frankfurt, De |
-
1990
- 1990-06-02 DE DE4017899A patent/DE4017899C1/en not_active Expired - Lifetime
-
1991
- 1991-04-15 ZA ZA912798A patent/ZA912798B/en unknown
- 1991-04-22 BR BR919101609A patent/BR9101609A/en not_active IP Right Cessation
- 1991-04-22 AU AU75257/91A patent/AU633203B2/en not_active Ceased
- 1991-05-31 CA CA002043654A patent/CA2043654C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5336474A (en) * | 1990-06-02 | 1994-08-09 | Degussa Aktiengesellschaft | Process for leaching of precious metals |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4017899C1 (en) | 1991-11-14 |
| BR9101609A (en) | 1992-04-07 |
| AU633203B2 (en) | 1993-01-21 |
| CA2043654C (en) | 2003-01-14 |
| ZA912798B (en) | 1992-01-29 |
| AU7525791A (en) | 1991-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |