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WO1997021842A1 - Procede de traitement thermique de minerais d'or refractaires - Google Patents

Procede de traitement thermique de minerais d'or refractaires Download PDF

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Publication number
WO1997021842A1
WO1997021842A1 PCT/EP1996/005453 EP9605453W WO9721842A1 WO 1997021842 A1 WO1997021842 A1 WO 1997021842A1 EP 9605453 W EP9605453 W EP 9605453W WO 9721842 A1 WO9721842 A1 WO 9721842A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermal treatment
water
refractory gold
gold ores
pyrite
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.)
Ceased
Application number
PCT/EP1996/005453
Other languages
German (de)
English (en)
Inventor
Bodo Peinemann
Gurudas Samant
Peter Sturm
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to EA199800550A priority Critical patent/EA000477B1/ru
Priority to BR9611943A priority patent/BR9611943A/pt
Publication of WO1997021842A1 publication Critical patent/WO1997021842A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/06—Sulfating roasting
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/10—Roasting processes in fluidised form
    • 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

Definitions

  • the invention relates to a method for the thermal treatment of refractory gold ores, with contents of ar ⁇ enopyrite, pyrite and organic carbon which are insufficient for the generation of the required heat of reaction in an oxidizing atmosphere with the addition of fuel.
  • the arsenopyrite, pyrite or organic carbon content is not sufficient to produce the required heat of reaction by roasting with oxygen-containing gases, so that fuel must therefore be added.
  • Sulfur and / or pyrite are added as fuel and the roasting is carried out at temperatures of 400 to 650 ° C. with the supply of oxygen-containing gases in a classic or circulating fluidized bed.
  • Hydrocarbons, hydrocarbon mixtures or refinery waste products are used as additional fuels (DE-C-4329417).
  • This object is achieved in such a way that the thermal treatment of the refractory gold ores is carried out with the addition of water or steam.
  • water or water vapor is expediently such that the water vapor content of the exhaust gas is 10 to 30%.
  • water or water vapor is partially, preferably up to 15%, replaced by one or more hydrocarbons, in particular kerosene and gasoline, which serve to form water or water vapor.
  • the process according to the invention is based on refractory gold ores with contents of 0.01 to 1.0% by weight arsenopyrite, 1 to 3.3% by weight pyrite, 0.02 to 0.1% by weight carbon and 0.1 up to 5.0 wt .-% CaC0 3 • MgC0 3 or CaC0 3 applied.
  • 1st embodiment 1st embodiment:
  • a refractory gold ore with a grain size d so 30 ⁇ m and 100% ⁇ 200 ⁇ m with a gold content of 8 g / t and 0.5% by weight sulfur, which was present as pyrite, and 0.08% by weight Carbon used.
  • the plant was a circulating fluidized bed plant for thermal treatment, mainly consisting of the fluidized bed reactor, a recycle cyclone, which was connected directly to the gas outlet at the top of the reactor, and a recycle line. The solid separated in the cyclone was returned to the reactor via the return line.
  • a mixture of 48 g pyrite per kg ore was produced. Then 40 kg / h of the mixture produced were fed into the fluidized bed reactor via a downpipe.
  • Air with a temperature of 400 ° C. was introduced into the wind box of the fluidized bed reactor.
  • the carrier gas flowed through the openings of the inflow floor.
  • the temperature of the reactor was 600 ° C.
  • the roasting gas had a content of 1790 vppm S0 2 , 0.2 vol% CO 2 , 20 vppm CO, 950 vppm NO x and 16.3 vol% 0 2 .
  • the levels of H 2 and hydrocarbons were below the detection limit of 1 vppm.
  • the process was carried out as in the first exemplary embodiment, with the difference that water was added to the fluidized bed reactor.
  • the roasting gas had a content of 645 vppm S0 2 , 0.1 vol .-% C0 2 , 5 vppm CO 167 vppm NO x and 16.8 vol .-% 0 ..
  • the contents of H 2 and hydrocarbons were below the detection limit from 1 vppm.
  • the roast had one Sulfur content of ⁇ 0.04% by weight and a carbon content of ⁇ 0.01% by weight. A gold yield of 96% was achieved during further processing.
  • the circulating fluidized bed consists of the fluidized bed reactor (1), the return cyclone (2) and the return line (3).
  • the fluidized bed reactor (1) had a diameter of 0.16 m and a height of 4 m.
  • Via line (4) 10 kg / h of a mixture of refractory gold ore and additives were charged into the reactor (1) by means of a metering screw. Air was passed via line (5) into the gas heater (6), heated there to 400 ° C. and introduced into the reactor (1) as a fluidizing gas via line (7). The temperature in the reactor was 600 ° C. Water was introduced into the reactor (1) via line (8) and secondary gas via line (9). These consisted of preheated air or oxygen.
  • the roasted material was withdrawn via line (10).
  • a gas-solid suspension was fed into the recycle cyclone (2) from the reactor (1) via line (11).
  • the exhaust gas was removed via line (12).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Catalysts (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

L'invention concerne un traitement thermique de minerais d'or réfractaires effectué dans une atmosphère oxydante avec apport de combustible. Pour réduire les émissions d'oxyde d'azote et de dioxyde de soufre dans l'atmosphère, on ajoute de l'eau ou de la vapeur d'eau.
PCT/EP1996/005453 1995-12-13 1996-12-05 Procede de traitement thermique de minerais d'or refractaires Ceased WO1997021842A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EA199800550A EA000477B1 (ru) 1995-12-13 1996-12-05 Способ термической обработки тугоплавких золотоносных руд
BR9611943A BR9611943A (pt) 1995-12-13 1996-12-05 Processo para tratamento térmico de minérios de ouro refratários

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995146538 DE19546538A1 (de) 1995-12-13 1995-12-13 Verfahren zur thermischen Behandlung refraktärer Golderze
DE19546538.5 1995-12-13

Publications (1)

Publication Number Publication Date
WO1997021842A1 true WO1997021842A1 (fr) 1997-06-19

Family

ID=7780011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/005453 Ceased WO1997021842A1 (fr) 1995-12-13 1996-12-05 Procede de traitement thermique de minerais d'or refractaires

Country Status (6)

Country Link
BR (1) BR9611943A (fr)
DE (1) DE19546538A1 (fr)
EA (1) EA000477B1 (fr)
MX (1) MX9603252A (fr)
PE (1) PE85798A1 (fr)
WO (1) WO1997021842A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ078399A0 (en) * 1999-06-04 1999-06-24 Tox Free Systems Limited Recovery of gold from gold sulphides
CN102051491B (zh) * 2010-11-19 2012-10-24 中南大学 一种黄铁矿包裹型金矿富集金的方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475254A (en) * 1937-04-23 1937-11-16 Mij Voor Zwavelzuurbereiding V A process for extracting metals from oxidic ores and the like
GB677050A (en) * 1949-11-23 1952-08-06 Dorr Co Roasting of arsenopyrite gold-bearing ores
GB682718A (en) * 1950-03-21 1952-11-12 Dorr Co Process for the heat treatment of ores
US4289529A (en) * 1978-10-10 1981-09-15 Hazen Research, Inc. Process for beneficiating sulfide ores
FR2670503A1 (fr) * 1990-12-17 1992-06-19 Ahlstroem Oy Procede de grillage de minerais sulfures.
EP0508542A2 (fr) * 1991-04-12 1992-10-14 METALLGESELLSCHAFT Aktiengesellschaft Procédé pour le traitement d'un minerai ayant des métaux recouvrables comprenant des composants contenant de l'arsenic
DE4329417C1 (de) * 1993-09-01 1994-08-18 Metallgesellschaft Ag Verfahren zum Rösten refraktärer Golderze
EP0622467A1 (fr) * 1993-04-30 1994-11-02 Metallgesellschaft Ag Procédé de grillage de minerais réfractaires contenant de l'or

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475254A (en) * 1937-04-23 1937-11-16 Mij Voor Zwavelzuurbereiding V A process for extracting metals from oxidic ores and the like
GB677050A (en) * 1949-11-23 1952-08-06 Dorr Co Roasting of arsenopyrite gold-bearing ores
GB682718A (en) * 1950-03-21 1952-11-12 Dorr Co Process for the heat treatment of ores
US4289529A (en) * 1978-10-10 1981-09-15 Hazen Research, Inc. Process for beneficiating sulfide ores
FR2670503A1 (fr) * 1990-12-17 1992-06-19 Ahlstroem Oy Procede de grillage de minerais sulfures.
EP0508542A2 (fr) * 1991-04-12 1992-10-14 METALLGESELLSCHAFT Aktiengesellschaft Procédé pour le traitement d'un minerai ayant des métaux recouvrables comprenant des composants contenant de l'arsenic
EP0622467A1 (fr) * 1993-04-30 1994-11-02 Metallgesellschaft Ag Procédé de grillage de minerais réfractaires contenant de l'or
DE4329417C1 (de) * 1993-09-01 1994-08-18 Metallgesellschaft Ag Verfahren zum Rösten refraktärer Golderze

Also Published As

Publication number Publication date
DE19546538A1 (de) 1997-06-19
EA000477B1 (ru) 1999-08-26
BR9611943A (pt) 1999-04-06
MX9603252A (es) 1997-06-28
PE85798A1 (es) 1999-01-23
EA199800550A1 (ru) 1998-12-24

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