DE59205427D1 - Gold and silver leaching processes - Google Patents
Gold and silver leaching processesInfo
- Publication number
- DE59205427D1 DE59205427D1 DE59205427T DE59205427T DE59205427D1 DE 59205427 D1 DE59205427 D1 DE 59205427D1 DE 59205427 T DE59205427 T DE 59205427T DE 59205427 T DE59205427 T DE 59205427T DE 59205427 D1 DE59205427 D1 DE 59205427D1
- Authority
- DE
- Germany
- Prior art keywords
- gold
- peroxoborate
- leached
- mill
- cyanidation
- 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.)
- Expired - Fee Related
Links
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
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)
- Chemically Coating (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Switches (AREA)
Abstract
In the so-called cyanidation-in-mill technique, the ores, ore concentrates and gangue material, which are to be leached, from previous incomplete leachings are treated with a cyanide-containing leaching solution already in the mill, gold and silver being leached out at least partially. As compared with the previously known cyanidation-in-mill technique in the presence of hydrogen peroxide, the gold yield can be substantially increased if the leaching is carried out in the presence of a peroxoborate compound. The peroxoborate can be present in a solid and/or dissolved form. Preferably 10 to 60 equivalents of peroxoborate are used per tonne of the material to be leached.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59205427T DE59205427D1 (en) | 1991-05-03 | 1992-04-01 | Gold and silver leaching processes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4114514A DE4114514A1 (en) | 1991-05-03 | 1991-05-03 | METHOD FOR THE LOWING OF GOLD AND SILVER |
DE59205427T DE59205427D1 (en) | 1991-05-03 | 1992-04-01 | Gold and silver leaching processes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE59205427D1 true DE59205427D1 (en) | 1996-04-04 |
Family
ID=6430935
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4114514A Withdrawn DE4114514A1 (en) | 1990-06-02 | 1991-05-03 | METHOD FOR THE LOWING OF GOLD AND SILVER |
DE59205427T Expired - Fee Related DE59205427D1 (en) | 1991-05-03 | 1992-04-01 | Gold and silver leaching processes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4114514A Withdrawn DE4114514A1 (en) | 1990-06-02 | 1991-05-03 | METHOD FOR THE LOWING OF GOLD AND SILVER |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0512247B1 (en) |
AT (1) | ATE134712T1 (en) |
AU (1) | AU642087B2 (en) |
BR (1) | BR9201586A (en) |
CA (1) | CA2067841A1 (en) |
DE (2) | DE4114514A1 (en) |
ES (1) | ES2084203T3 (en) |
ZA (1) | ZA923190B (en) |
ZW (1) | ZW4892A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19829274C2 (en) * | 1998-07-01 | 2002-06-20 | Otb Oberflaechentechnik Berlin | Process for the recovery of precious metals |
DE102020209885A1 (en) | 2020-08-05 | 2022-02-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Ball mill and process for extracting gold and/or silver and/or at least one platinum group metal |
DE102020209884A1 (en) | 2020-08-05 | 2022-02-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method of extracting gold |
DE102020209880A1 (en) | 2020-08-05 | 2022-02-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process for the extraction of at least one precious metal |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU587850B2 (en) * | 1985-08-26 | 1989-08-31 | Bendigo Gold Associates Pty. Ltd. | A method of pre-treating an ore with hot alkali to improve the recovery of metal valves |
DE4017899C1 (en) * | 1990-06-02 | 1991-11-14 | Degussa Ag, 6000 Frankfurt, De | 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 |
-
1991
- 1991-05-03 DE DE4114514A patent/DE4114514A1/en not_active Withdrawn
-
1992
- 1992-03-27 ZW ZW48/92A patent/ZW4892A1/en unknown
- 1992-04-01 AT AT92105566T patent/ATE134712T1/en not_active IP Right Cessation
- 1992-04-01 EP EP92105566A patent/EP0512247B1/en not_active Expired - Lifetime
- 1992-04-01 ES ES92105566T patent/ES2084203T3/en not_active Expired - Lifetime
- 1992-04-01 DE DE59205427T patent/DE59205427D1/en not_active Expired - Fee Related
- 1992-04-29 BR BR929201586A patent/BR9201586A/en not_active Application Discontinuation
- 1992-04-30 ZA ZA923190A patent/ZA923190B/en unknown
- 1992-05-01 CA CA002067841A patent/CA2067841A1/en not_active Abandoned
- 1992-05-01 AU AU15960/92A patent/AU642087B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
ES2084203T3 (en) | 1996-05-01 |
ZA923190B (en) | 1993-01-27 |
CA2067841A1 (en) | 1992-11-04 |
EP0512247B1 (en) | 1996-02-28 |
ZW4892A1 (en) | 1993-02-17 |
EP0512247A2 (en) | 1992-11-11 |
AU1596092A (en) | 1992-11-05 |
DE4114514A1 (en) | 1992-11-05 |
ATE134712T1 (en) | 1996-03-15 |
BR9201586A (en) | 1992-12-15 |
AU642087B2 (en) | 1993-10-07 |
EP0512247A3 (en) | 1993-05-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |