EP0512247A3 - Method for leaching gold and silver - Google Patents

Method for leaching gold and silver Download PDF

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Publication number
EP0512247A3
EP0512247A3 EP19920105566 EP92105566A EP0512247A3 EP 0512247 A3 EP0512247 A3 EP 0512247A3 EP 19920105566 EP19920105566 EP 19920105566 EP 92105566 A EP92105566 A EP 92105566A EP 0512247 A3 EP0512247 A3 EP 0512247A3
Authority
EP
European Patent Office
Prior art keywords
peroxoborate
leached
silver
mill
gold
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
Application number
EP19920105566
Other languages
German (de)
Other versions
EP0512247B1 (en
EP0512247A2 (en
Inventor
Juergen Dr. Loroesch
Annette Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6430935&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0512247(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Degussa GmbH filed Critical Degussa GmbH
Publication of EP0512247A2 publication Critical patent/EP0512247A2/en
Publication of EP0512247A3 publication Critical patent/EP0512247A3/en
Application granted granted Critical
Publication of EP0512247B1 publication Critical patent/EP0512247B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
EP92105566A 1991-05-03 1992-04-01 Method for leaching gold and silver Expired - Lifetime EP0512247B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114514 1991-05-03
DE4114514A DE4114514A1 (en) 1991-05-03 1991-05-03 METHOD FOR THE LOWING OF GOLD AND SILVER

Publications (3)

Publication Number Publication Date
EP0512247A2 EP0512247A2 (en) 1992-11-11
EP0512247A3 true EP0512247A3 (en) 1993-05-05
EP0512247B1 EP0512247B1 (en) 1996-02-28

Family

ID=6430935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105566A Expired - Lifetime EP0512247B1 (en) 1991-05-03 1992-04-01 Method for leaching 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)

* Cited by examiner, † Cited by third party
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

Citations (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

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
DE59205427D1 (en) 1996-04-04
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

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