UST104001I4 - Method for recovering gold from refractory ores - Google Patents

Method for recovering gold from refractory ores Download PDF

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Publication number
UST104001I4
UST104001I4 US06/536,222 US53622283A UST104001I4 US T104001 I4 UST104001 I4 US T104001I4 US 53622283 A US53622283 A US 53622283A US T104001 I4 UST104001 I4 US T104001I4
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US
United States
Prior art keywords
ore
gold
ores
refractory ores
maintaining
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.)
Pending
Application number
US06/536,222
Inventor
Richard S. Kunter
John R. Turney
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.)
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Publication date
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Priority to US06/536,222 priority Critical patent/UST104001I4/en
Application granted granted Critical
Publication of UST104001I4 publication Critical patent/UST104001I4/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G7/00—Compounds of gold
    • 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
    • C22B11/04—Obtaining noble metals by wet processes
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A process for pretreating refractory ores improves the recovery of gold from such ores upon subsequent cyanidation. After comminuting the ore and forming an aqueous slurry, the ore is subjected to pressurized oxidation at an elevated temperature. By adjusting the pH to below about 1.85 and maintaining the pressure and temperature above 300 psig and 160° C., respectively, very high recovery of gold can be achieved. Additionally, by maintaining a preselected soluble iron concentration in the slurry, the oxidation of the ore is promoted and proceeds at a more rapid rate.
US06/536,222 1982-02-16 1983-09-26 Method for recovering gold from refractory ores Pending UST104001I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/536,222 UST104001I4 (en) 1982-02-16 1983-09-26 Method for recovering gold from refractory ores

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34914982A 1982-02-16 1982-02-16
US06/536,222 UST104001I4 (en) 1982-02-16 1983-09-26 Method for recovering gold from refractory ores

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US34914982A Continuation 1982-02-16 1982-02-16

Publications (1)

Publication Number Publication Date
UST104001I4 true UST104001I4 (en) 1984-03-06

Family

ID=26996051

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/536,222 Pending UST104001I4 (en) 1982-02-16 1983-09-26 Method for recovering gold from refractory ores

Country Status (1)

Country Link
US (1) UST104001I4 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979987A (en) * 1988-07-19 1990-12-25 First Miss Gold, Inc. Precious metals recovery from refractory carbonate ores
US5256189A (en) * 1992-05-20 1993-10-26 Prime Resources Group Inc. Aqueous oxidation of sulfidic silver ore
US5320720A (en) * 1993-01-05 1994-06-14 Prime Resources Group Inc. Extraction of precious metals from ores thereof
US5489326A (en) * 1994-10-04 1996-02-06 Barrick Gold Corporation Gold recovery using controlled oxygen distribution pressure oxidation
US20070217285A1 (en) * 2006-03-17 2007-09-20 Barrick Gold Corporation Autoclave with underflow dividers
US20070292326A1 (en) * 2006-06-15 2007-12-20 Barrick Gold Corporation Process for reduced alkali consumption in the recovery of silver
US7604783B2 (en) 2004-12-22 2009-10-20 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractor gold ores or concentrates

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979987A (en) * 1988-07-19 1990-12-25 First Miss Gold, Inc. Precious metals recovery from refractory carbonate ores
US5256189A (en) * 1992-05-20 1993-10-26 Prime Resources Group Inc. Aqueous oxidation of sulfidic silver ore
US5320720A (en) * 1993-01-05 1994-06-14 Prime Resources Group Inc. Extraction of precious metals from ores thereof
US5489326A (en) * 1994-10-04 1996-02-06 Barrick Gold Corporation Gold recovery using controlled oxygen distribution pressure oxidation
US7604783B2 (en) 2004-12-22 2009-10-20 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractor gold ores or concentrates
US20100024603A1 (en) * 2004-12-22 2010-02-04 Placer Dome Technical Services Ltd. Reduction of lime consumption when treating refractory gold ores or concentrates
US8029751B2 (en) 2004-12-22 2011-10-04 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractory gold ores or concentrates
US20070217285A1 (en) * 2006-03-17 2007-09-20 Barrick Gold Corporation Autoclave with underflow dividers
US8061888B2 (en) 2006-03-17 2011-11-22 Barrick Gold Corporation Autoclave with underflow dividers
US20070292326A1 (en) * 2006-06-15 2007-12-20 Barrick Gold Corporation Process for reduced alkali consumption in the recovery of silver
US8252254B2 (en) 2006-06-15 2012-08-28 Barrick Gold Corporation Process for reduced alkali consumption in the recovery of silver

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