WO2006133777A1 - Separation des valeurs metalliques dans les residus d'extraction du zinc - Google Patents

Separation des valeurs metalliques dans les residus d'extraction du zinc Download PDF

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Publication number
WO2006133777A1
WO2006133777A1 PCT/EP2006/004412 EP2006004412W WO2006133777A1 WO 2006133777 A1 WO2006133777 A1 WO 2006133777A1 EP 2006004412 W EP2006004412 W EP 2006004412W WO 2006133777 A1 WO2006133777 A1 WO 2006133777A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
agglomerates
process according
fuming
residues
Prior art date
Application number
PCT/EP2006/004412
Other languages
English (en)
Inventor
Maurits Van Camp
Charles Geenen
Jonathan Aerts
Original Assignee
Umicore
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 Umicore filed Critical Umicore
Priority to EA200800030A priority Critical patent/EA013690B1/ru
Priority to JP2008515071A priority patent/JP2008545888A/ja
Priority to AU2006257458A priority patent/AU2006257458A1/en
Priority to CA002611925A priority patent/CA2611925A1/fr
Priority to US11/917,278 priority patent/US20080196551A1/en
Priority to EP06753557A priority patent/EP1893779A1/fr
Priority to BRPI0612150A priority patent/BRPI0612150A2/pt
Priority to MX2007015812A priority patent/MX2007015812A/es
Publication of WO2006133777A1 publication Critical patent/WO2006133777A1/fr
Priority to NO20080042A priority patent/NO20080042L/no

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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/04—Obtaining zinc by distilling
    • 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
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/002—Dry processes by treating with halogens, sulfur or compounds thereof; by carburising, by treating with hydrogen (hydriding)
    • 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

Definitions

  • This invention relates to the separation of metals in Fe-bearing zinc leaching residues, in particular neutral and weak acid leach residues.
  • Blende which is an impure ZnS ore, is the main starting material for the production of Zn.
  • the typical industrial practice encompasses an oxidative roasting step, producing ZnO together with sulphates or oxides of the impurities.
  • the ZnO in roasted blende is brought into solution by leaching in neutral conditions or in weak acidic conditions, thereby producing Zn-depleted residues, respectively referred to as neutral leach residue and as weak acid leach residue in this description.
  • These residues typically contain from 2 to 10 wt . % S, up to 30 wt% Zn, 35 wt% Fe, 7 wt% Pb and 7 wt% SiO 2 .
  • the leach residues therefore contain, besides lead sulphate, calcium sulphate and other impurities, a sizeable fraction of Zn in the form of ferrite.
  • the recovery of the Zn from ferrite requires a specific hydro-metallurgical residue treatment using high acid concentrations of 50 to 200 g/1 H 2 SO 4 .
  • a disadvantage of this acidic treatment is that besides Zn, almost all the Fe and also other impurities such as As, Cu, Cd, Ni, Co, Tl, Sb are dissolved.
  • Waelz kilns which produce a slag and a Zn and Pb containing fume.
  • Waelz kilns Such a process is described in 'Steelworks residues and the Waelz kiln treatment of electric arc furnace dust', G. Strohmeier and J. Bonestell, Iron and Steel Engineer vol. 73, N°4, pp. 87-90.
  • zinc enters in the form of ferrites and sulphate, and is vaporized after being reduced by CO generated by burning cokes.
  • the reaction zone of the kiln where iron is reduced to metal, the problem of overheating occurs frequently.
  • the charge in the kiln melts and accretions are formed, mainly due to the formation of the eutectic 2FeCSiO 2 - FeO, which has a melting point of approximately 1180 °C.
  • the dissolution of FeO further lowers the melting point and through combination with zinc sulphide, reduced from zinc sulphate in the earlier stages, solid crusts are formed.
  • the furnace rotation is further hampered by the formation of large balls consisting of carbonized iron, which are formed as a molten metallic phase at approx. 1150 0 C. This again leads to a decreased reduction of ZnO and iron oxide, which are formed in the earlier stages of the furnace from reduced zinc ferrites.
  • Overheating accelerates the wear of the brick lining of the kiln.
  • the CaO/SiO 2 ratio in the feed has to be monitored closely by setting it to a value of 0.8 to 1.8.
  • WO2005-005674 a process for the separation and recovery of non- ferrous metals from zinc-bearing residues was disclosed.
  • the process comprises the steps of subjecting the residue to a direct reduction step, extracting Zn- and Pb-bearing fumes, and subjecting the resulting metallic Fe-bearing phase to an oxidising smelting step.
  • the direct reduction is performed in a multiple hearth furnace operating at 1100 °C in the reduction zone.
  • One disadvantage of the use of such a reduction furnace is that the reduction kinetics are limited by the temperature. Temperatures above 1100 0 C can however not be reached in a multiple hearth furnace.
  • JP2004-107748 describes a process for the treatment of zinc leaching residues in a rotary hearth furnace, at a reduction temperature up to 1250 0 C.
  • the burner air ratio is set within a limited range.
  • the aim of the present invention is to provide a process for the separation of the metals contained in Fe-bearing zinc leaching residues, which does not have the disadvantages described above. This process comprises the steps of:
  • the Zn leaching residue should preferably be dried to a moisture content of less than 12 wt . % H 2 O, or even to less than 5 wt . % H 2 O, before preparing the agglomerates.
  • a carbon content in the agglomerates of at least 15 wt . % is preferred, as is a CaO equivalent of at least 10 wt.%, or even at least 15 wt . % .
  • the strength of the pellets should preferably be at least 5 kg, or even 10 kg. This way dust carry over is avoided and the fusion of the charge is better prevented at the high process temperatures.
  • the fuming should advantageously be performed at a temperature of at least 1300 °C, in a carbon monoxide containing atmosphere
  • the process is ideally suited for processing neutral or weak acid Zn leach residues.
  • the invented process can be performed in a in a rotary hearth furnace; it can optionally be followed by a process whereby the reduced Fe- bearing phase is melted and oxidised.
  • the high S content of the feed allows for a relatively high operating temperature without producing molten phases. There is thus no danger for the formation of accretions at the discharge port of the furnace.
  • High temperatures guarantee fast reduction and fuming kinetics, which permit the use of a compact technology such as a static bed furnace. This type of furnace furthermore preserves the integrity of the agglomerates, avoiding to a large extent the production of dust and limiting the ensuing pollution of the fumes.
  • the following example illustrates the separation of different non- ferrous metals contained in a roasted and subsequently leached blende.
  • WAL Weak Acid Leaching
  • ZnO-Fe 2 O 3 zinc ferrite
  • PbSO 4 lead sulphate
  • CaSO 4 calcium sulphate
  • ZnSO 4 zinc sulphate
  • impurities like CaO, SiO 2 , MgO, Al 2 O 3 , Cu 2 O, SnO
  • This mixture was compacted in briquettes by pressing it between 2 hydraulic rolls at a pressure of 20 kN/cm 2 resulting in hard, shiny briquettes, having a Mass Pellet Strength of 20 kg.
  • the fuming step was carried out in an induction furnace to simulate the process occurring in a rotating hearth furnace.
  • An Indutherm MU-3000 furnace with a maximum power of 15 kW and a frequency of 2000 Hz was used.
  • the internal furnace diameter was 180 mm, and the graphite crucible carrying the briquettes had an internal diameter of 140 mm.
  • Approximately 40O g briquettes was placed on the bottom of the clean graphite crucible, in such a way that the crucible surface is covered with a single layer of material.
  • the crucible was then placed in the induction furnace, and a monitoring thermocouple was mounted between the briquettes without touching the crucible bottom.
  • the crucible was covered by a refractory plate.
  • the fumed metals were post combusted above the crucible and captured in a filter under the form of flue dust.
  • the reactor and the material were heated at to 1300 0 C, as measured with a Pt/PtRhl0 thermocouple mounted between the briquettes. Up to 600 0 C, heating was performed under a protective N 2 gas atmosphere at a gas flow rate of 200 1/h. From 600 °C to 1300 0 C, CO was injected into the crucible at a flow rate of 200 1/h.
  • Example 2 This example illustrates the crucial role of S the briquettes, as it avoids the softening and melting of the material during the roasting process without loss in the selectivity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne la séparation des métaux dans des résidus d'extraction du zinc porteurs de Fe, en particulier dans des résidus d'extraction faiblement acides et neutres. Le procédé de l'invention consiste à : préparer des agglomérats contenant, à part le résidu d'extraction du Zn, au moins 5% en poids de carbone et entre 2 et 10% en poids de S; à faire réduire lesdits agglomérats dans un lit statique à une température supérieure à 1250 °C, produisant de la sorte une phase porteuse de Fe réduite et des fumées porteuses de Zn; et à extraire lesdites fumées porteuses de Zn. La haute teneur en S du la charge d'alimentation permet d'atteindre une température de fonctionnement relativement élevée sans production de phases fondues, garantissant de la sorte une cinétique de réduction et d'émanation de fumées rapide et autorisant l'utilisation d'une technologie peu encombrante telle qu'un four à lit statique.
PCT/EP2006/004412 2005-06-13 2006-05-11 Separation des valeurs metalliques dans les residus d'extraction du zinc WO2006133777A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EA200800030A EA013690B1 (ru) 2005-06-13 2006-05-11 Извлечение ценных металлов из отходов выщелачивания цинка
JP2008515071A JP2008545888A (ja) 2005-06-13 2006-05-11 亜鉛浸出残渣中の金属有価物の分離
AU2006257458A AU2006257458A1 (en) 2005-06-13 2006-05-11 Separation of metal values in zinc leaching residues
CA002611925A CA2611925A1 (fr) 2005-06-13 2006-05-11 Separation des valeurs metalliques dans les residus d'extraction du zinc
US11/917,278 US20080196551A1 (en) 2005-06-13 2006-05-11 Separation of Metal Values in Zinc Leaching Residues
EP06753557A EP1893779A1 (fr) 2005-06-13 2006-05-11 Separation des valeurs metalliques dans les residus d'extraction du zinc
BRPI0612150A BRPI0612150A2 (pt) 2005-06-13 2006-05-11 processo para a separação de valores metálicos em um resíduo de zn contendo fe
MX2007015812A MX2007015812A (es) 2005-06-13 2006-05-11 Separacion de valores de metal en residuos de lixiviacion de zinc.
NO20080042A NO20080042L (no) 2005-06-13 2008-01-03 Separering av metallverdier i sinkutluftingsrester

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP05076375 2005-06-13
EP05076375 2005-06-13
US75007705P 2005-12-14 2005-12-14
US60/750,077 2005-12-14

Publications (1)

Publication Number Publication Date
WO2006133777A1 true WO2006133777A1 (fr) 2006-12-21

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ID=35240857

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004412 WO2006133777A1 (fr) 2005-06-13 2006-05-11 Separation des valeurs metalliques dans les residus d'extraction du zinc

Country Status (14)

Country Link
US (1) US20080196551A1 (fr)
EP (1) EP1893779A1 (fr)
JP (1) JP2008545888A (fr)
KR (1) KR20080022545A (fr)
CN (1) CN101341265A (fr)
AU (1) AU2006257458A1 (fr)
BR (1) BRPI0612150A2 (fr)
CA (1) CA2611925A1 (fr)
EA (1) EA013690B1 (fr)
MX (1) MX2007015812A (fr)
NO (1) NO20080042L (fr)
PE (1) PE20070088A1 (fr)
WO (1) WO2006133777A1 (fr)
ZA (1) ZA200710377B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979684A (zh) * 2010-12-01 2011-02-23 中南大学 一种从热镀锌灰中回收锌的工艺

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CN103103344A (zh) * 2013-03-01 2013-05-15 中南大学 一种含硫酸盐铅锌冶炼渣选冶联合处理方法
CN106148682A (zh) * 2016-08-01 2016-11-23 江苏省冶金设计院有限公司 处理锌浸出渣的方法和***
CN106119535A (zh) * 2016-08-01 2016-11-16 江苏省冶金设计院有限公司 处理锌浸出渣的方法和***
RU2626371C1 (ru) * 2016-09-05 2017-07-26 Общество с ограниченной ответственностью "Урал - рециклинг" Способ переработки отходов металлургического производства
CN106399702A (zh) * 2016-09-27 2017-02-15 江苏省冶金设计院有限公司 一种转底炉处理铅锌渣回收有色金属的工艺
CN106929667A (zh) * 2017-03-13 2017-07-07 江苏省冶金设计院有限公司 一种处理锌浸渣的方法
CN107254586B (zh) * 2017-06-20 2019-05-14 西部矿业股份有限公司 一种氧压浸出尾矿渣的处理方法
CN114540628B (zh) * 2022-01-20 2023-11-14 云南云铜锌业股份有限公司 一种处理浸锌渣、锌冶炼石膏渣和高炉瓦斯灰的方法

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Publication number Priority date Publication date Assignee Title
US4605435A (en) * 1985-01-31 1986-08-12 Amax Inc. Recycling of steel plant dusts to steel furnaces
WO1988001654A1 (fr) * 1986-08-27 1988-03-10 Commonwealth Scientific And Industrial Research Or Procede de traitement de minerais, de concentres ou de residus de plomb-zinc
US5667553A (en) * 1995-03-02 1997-09-16 Complete Recovery Process, Llc Methods for recycling electric arc furnace dust
US5906671A (en) * 1996-10-25 1999-05-25 Agglo Inc. Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials
EP1199373A1 (fr) * 2000-10-17 2002-04-24 Universite Catholique De Louvain Eléments agglomérés et procédé de traítement de poussières métallurgiques
JP2004107748A (ja) * 2002-09-19 2004-04-08 Daido Steel Co Ltd 亜鉛浸出残渣の処理方法

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WO1998021372A1 (fr) * 1996-11-11 1998-05-22 Sumitomo Metal Industries, Ltd. Procede et dispositif de fabrication de fer reduit
CN1246485C (zh) * 2000-10-30 2006-03-22 新日本制铁株式会社 用于还原炉的含氧化金属的未加工颗粒的制造方法及其还原方法
BRPI0412304B1 (pt) * 2003-07-04 2013-11-26 PROCESSO PARA A VALORIZAÇÃO DE VALORES DE METAL EM UM RESÍDUO PORTANDO Zn, Fe E Pb

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US4605435A (en) * 1985-01-31 1986-08-12 Amax Inc. Recycling of steel plant dusts to steel furnaces
WO1988001654A1 (fr) * 1986-08-27 1988-03-10 Commonwealth Scientific And Industrial Research Or Procede de traitement de minerais, de concentres ou de residus de plomb-zinc
US5667553A (en) * 1995-03-02 1997-09-16 Complete Recovery Process, Llc Methods for recycling electric arc furnace dust
US5906671A (en) * 1996-10-25 1999-05-25 Agglo Inc. Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials
EP1199373A1 (fr) * 2000-10-17 2002-04-24 Universite Catholique De Louvain Eléments agglomérés et procédé de traítement de poussières métallurgiques
JP2004107748A (ja) * 2002-09-19 2004-04-08 Daido Steel Co Ltd 亜鉛浸出残渣の処理方法

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Title
"Zinc leach residues - A mine on the doorstep", METAL BULLETIN MONTHLY, April 1971 (1971-04-01), pages 6 - 10, XP009056015 *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *
STROHMEIER G ET AL: "STEELWORKS RESIDUES AND THE WAELZ KILN TREATMENT OF ELECTRIC ARC FURNACE DUST", IRON AND STEEL ENGINEER, ASSOCIATION OF IRON AND STEEL ENGINEERS. PITTSBURGH, US, vol. 73, no. 4, 1 April 1996 (1996-04-01), pages 87 - 90, XP000595696, ISSN: 0021-1559 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979684A (zh) * 2010-12-01 2011-02-23 中南大学 一种从热镀锌灰中回收锌的工艺

Also Published As

Publication number Publication date
KR20080022545A (ko) 2008-03-11
CA2611925A1 (fr) 2006-12-21
EP1893779A1 (fr) 2008-03-05
MX2007015812A (es) 2008-04-29
CN101341265A (zh) 2009-01-07
JP2008545888A (ja) 2008-12-18
AU2006257458A1 (en) 2006-12-21
ZA200710377B (en) 2009-03-25
EA200800030A1 (ru) 2008-12-30
EA013690B1 (ru) 2010-06-30
US20080196551A1 (en) 2008-08-21
NO20080042L (no) 2008-01-03
BRPI0612150A2 (pt) 2016-09-06
PE20070088A1 (es) 2007-02-02

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