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WO2007066350A1 - Processus de récupération de fer à partir de laitier de cuivre - Google Patents

Processus de récupération de fer à partir de laitier de cuivre Download PDF

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Publication number
WO2007066350A1
WO2007066350A1 PCT/IN2005/000452 IN2005000452W WO2007066350A1 WO 2007066350 A1 WO2007066350 A1 WO 2007066350A1 IN 2005000452 W IN2005000452 W IN 2005000452W WO 2007066350 A1 WO2007066350 A1 WO 2007066350A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
slag
iron
reductant
recovery
Prior art date
Application number
PCT/IN2005/000452
Other languages
English (en)
Inventor
Archana Agrawal
Kanai Lal Sahoo
Sukomal Ghosh
Banshi Dhar Pandey
Original Assignee
Council Of Scientific And Industrial Research
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 Council Of Scientific And Industrial Research filed Critical Council Of Scientific And Industrial Research
Priority to AU2005338902A priority Critical patent/AU2005338902B2/en
Priority to CA 2632530 priority patent/CA2632530A1/fr
Publication of WO2007066350A1 publication Critical patent/WO2007066350A1/fr

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
    • C22B7/04—Working-up slag
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0054—Slag, slime, speiss, or dross treating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • 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
    • C22B15/00—Obtaining copper
    • 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
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C2300/00—Process aspects
    • C21C2300/04—Avoiding foam formation
    • 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
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the present invention relates to a process for recovery of iron from copper slag.
  • This invention particularly relates to a process for recovery of iron from a waste like granulated copper slag generated during the production of copper from its ores by a pyrometallurgicai method.
  • the present invention will be useful for solving the ecological and environmental issues with an added economic advantage of utilising the dump slag generated in the copper plants.
  • Refrence may also be made to Topkaya [ATB Metall, 1990] wherein ancient copper slag of Kure in Turkey was subjected to carbothermic reduction to produce an Fe-Co- Cu alloy. It was found that with 4% coke powder addition an alloy containing 1.72% Co and 4.41 % Cu could be obtained at 1400 0 C in 1 h with Co and Cu recoveries of 97.7% and 86.7% respectively. Yucel et.al [Scand . J. Metal, 1999] reported the treatment of ancient Kure copper slag containing 2.38% cobalt and 3.51 % copper by carbothermal reduction process in a DC arc furnace (open top) by adding coke with maximum metal recovery in one hour reduction time at a temperature between 1703-1753 K.
  • Refrence may be made to Jones et.al [Int. Symp. challenges of process intensification Montreal, Canada, Mintek paper No.8360, Aug 1996] wherein they reported the recovery of valuable metals, such as nickel, cobalt, and copper in an alloy from copper slags by carbonaceous reduction in a DC arc furnace. Pilot plant test work at Mintek (South Africa) has demonstrated recoveries of 98% nickel and 80% cobalt at the power levels of up to 60OkW and maximum possible quantity of iron oxide in the slag. Reference may be made to Acma et.al [Conf.
  • Hartenstein patent discloses a process for utilizing the waste products of blast furnaces wherein slag is subjected to treatment with a carbonaceous material and electric current.
  • the Betts patent discloses a metallurgical process wherein silicon is used in recovering iron and copper from a slag.
  • the Stout patent discloses a method of treatment of copper metallurgical slag wherein the slag is treated with iron to extract additional copper.
  • the Fowler et al patent discloses a process for recovering copper from slag wherein carbonaceous material is added to reduce the slag and obtain the copper therefrom.
  • the Lichty patent discloses a process for recovery of metals from metallurgical slag wherein silicon is used as a reducing agent to obtain iron and copper from the slag.
  • the Kuzell patent discloses a process of treating copper matte wherein iron and copper are recovered by air blowing a molten charge of the matte.
  • the Wiberg patent discloses a method for refining metals.
  • the Zimmerley et al patent discloses recovery of molybdenum from slag by means of a reduction smelting operation.
  • the Ammann et al patent discloses a process for recovering copper from molten converter-type slags wherein the magnetite in the slag is reduced with carbonaceous materials and/or other solid reductants and stirring of the slag is utilized.
  • the main object of the present invention is to provide a process for recovery of iron from copper slag.
  • Another objective of the present invention is to provide a process for the production of metal from the granulated slag generated during the processing of copper concentrates.
  • Still another object of the present invention is to provide a process for the production of metal from the granulated slag generated during the processing of copper concentrates from an Indian copper producing company.
  • the present invention provides a process for the recovery of iron from copper slag which comprises:
  • step (ii) inducting the mixture obtained in step (ii) in the molten metal pool at a slow rate so that vigorous reaction can be avoided
  • the copper slag used in the process may have the following composition range:
  • the reductant material may be selected from, graphite, petroleum coke and like materials and may have size in the range between 0.2 to 10mm.
  • the addition of reductant material may be made through the following three stages: stage-1 : 15 to 20 weight % of the reductant is added initially after completely melting of metal pool, stage-2: 50 to 60 weight % of reductant is mixed with granulated slag and flux, stage-3: 30 to 35 weight % of the reductant is added during the melting process to avoid foaming.
  • stage-1 15 to 20 weight % of the reductant is added initially after completely melting of metal pool
  • stage-2 50 to 60 weight % of reductant is mixed with granulated slag and flux
  • stage-3 30 to 35 weight % of the reductant is added during the melting process to avoid foaming.
  • the created amount of molten pool may be of 10 to 20 volume % of furnace capacity.
  • the flux used may be selected from oxide and carbonate of calcium and magnesium.
  • the obtained products may be grinding grade cast iron and like and the recovery rate of iron may be in the range of 75 to 85 weight % of iron values.
  • the copper slag from any copper industry is analyses for its chemical composition.
  • the chunks of copper slag was broken into small lumps and ground into small granulated particles in the size range of 2 to 15 mm.
  • iron oxide i.e. FeO, Fe 2 O 3 , Fe 3 O 4 and chemical composition of iron and silica in the copper slag
  • the amount of reductant and fluxing material is calculated.
  • Granulated slag, reductant and the fluxes are mixed in a mixing muller for a time period of 2 to 5 min in order to get a homogenous mixture.
  • a molten metal pool bath was created and a calculated amount of reductant was added.
  • Novelty of the present invention is process for the preparation of value added products viz grinding grade cast iron using copper slag generated during the processing of copper concentrate which otherwise is considered as a waste.
  • Other novel features of the inventions are creating a homogeneous mixture of slag, reductant and flux so that reaction kinetics is more than conventional process.
  • the reductant is used in such a way so that maximum recovery of iron can take place.
  • the granulated copper slag containing Cu(weight %): 0.523, Silica(weight %): 30.1 , Lime(weight %) : 3.8, Fe(weight %): 42.8, Cd(ppm): 0.003, Co(ppm) :5.6, Ni(ppm): 0.58, Pb(ppm): 10.9 was selected from the copper slag generated during the processing of copper containing concentrate from a copper producing industry.10 kg of granulated copper slag of size range 5 to 10 mm, lime of amount 2.5kg and graphite powder of amount 0.6kg was mixed in a muller for two minutes. 5 kg of pig iron was melted in direct arc furnace. In the molten pool, 0.2kg of graphite was added.
  • the copper slag mixture was added slowly into the molten pool.
  • the melt temperature was maintained at 1370 to 1390 0 C and the reduction time was around 1 h.
  • the slag was skimmed off from the furnace and the melt was tapped to a ladle and finally poured in moulds as well as in standard test blocks. Recovery of iron from the slag was about 85 weight %.
  • the granulated copper slag containing Cu(weight %): 0.523, Silica(weight %): 30.1 , Lime(weight %) : 3.8, Fe(weight %): 42.8, Cd(ppm): 0.003, Co(ppm) :5.6, Ni(ppm): 0.58, Pb(ppm): 10.9 was selected from the copper slag generated during the processing of copper containing concentrate from a copper producing industry.15 kg of granulated copper slag of size range 10 to 15 mm, lime of amount 3.0kg and petroleum coke of amount 1.0kg was mixed in a muller for three min. 4kg of cast iron having carbon content 3.2 weight % was melted in direct arc furnace.
  • the copper slag containing Cu(weight %): 0.227, Silica(weight %): 30.9, Lime(weight %) : 0.41 , Fe(weight %): 36.89, Cd(ppm): 0.003, Co(ppm) : 2.72, Ni(ppm): 0.37, Pb(ppm): 5.17 was selected from the copper slag generated during the processing of copper containing concentrate from a copper producing industry. 10 kg of copper slag of size range 5 to 10 mm, lime of amount 3.0kg and graphite powder of amount 0.5kg was mixed in a muller for two min. 4 kg of pig iron was melted in direct arc furnace. In the molten pool 0.3kg of graphite was added.
  • the produced alloy has the potential to be used as grinding media applications.
  • Copper slag acts as a alternative raw material for the production of alloyed cast iron compared to conventional one.
  • Melting can be carried out in the open top or closed top arc furnace.
  • any grade of copper slag can be used as a raw material for the recovery of iron.

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

Abstract

La présente invention concerne un processus de récupération de fer à partir de laitier de cuivre. La présente concerne en particulier un processus de récupération de fer à partir de laitier de cuivre granulé de type déchet et généré pendant la production de cuivre à partir de ses minerais selon un procédé pyrométallurgique. La présente invention permettra de résoudre les problèmes écologiques et environnementaux avec un avantage économique supplémentaire consistant à utiliser le laitier de mauvaise qualité généré dans les usines de cuivre. La nouveauté de la présente invention réside dans l’élaboration de produits à valeur ajoutée par rapport à la fonte de qualité de meulage à l’aide de laitier de cuivre généré pendant le traitement de concentré de cuivre que l’on considère d’ordinaire comme déchet. D’autres caractéristiques novatrices de l’invention portent sur la création d’un mélange homogène de laitier, d’un réductant et d’un flux pour que les cinétiques de réaction soient supérieures au processus conventionnel. On utilise le réductant pour obtenir la récupération maximale de fer.
PCT/IN2005/000452 2005-12-09 2005-12-29 Processus de récupération de fer à partir de laitier de cuivre WO2007066350A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2005338902A AU2005338902B2 (en) 2005-12-09 2005-12-29 A process for recovery of iron from copper slag
CA 2632530 CA2632530A1 (fr) 2005-12-09 2005-12-29 Processus de recuperation de fer a partir de laitier de cuivre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN3331DEL2005 2005-12-09
IN3331DE2005 2005-12-09

Publications (1)

Publication Number Publication Date
WO2007066350A1 true WO2007066350A1 (fr) 2007-06-14

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US (1) US20070283785A1 (fr)
KR (1) KR20080081258A (fr)
AU (1) AU2005338902B2 (fr)
CA (1) CA2632530A1 (fr)
MY (1) MY144628A (fr)
WO (1) WO2007066350A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104185687A (zh) * 2012-09-07 2014-12-03 韩国地质资源研究院 通过物理和化学分离技术从包括铜、锌和铅的有色金属的冶炼过程中排放的有色金属废渣中分离和回收铁的方法
EP2839045A1 (fr) * 2012-04-16 2015-02-25 Outotec (Finland) Oy Procédé pour le traitement de laitier de métallurgie de métaux non ferreux
WO2016004913A1 (fr) * 2014-07-11 2016-01-14 Aurubis Ag Procédé et dispositif de traitement d'une roche de silicate de fer
CN105838870A (zh) * 2016-05-24 2016-08-10 江苏省冶金设计院有限公司 制备还原铁的系统及其应用
CN107699698A (zh) * 2017-09-30 2018-02-16 江苏省冶金设计院有限公司 处理铜渣的方法
CN108728660A (zh) * 2018-06-20 2018-11-02 中国恩菲工程技术有限公司 铜渣贫化方法
CN110578028A (zh) * 2019-10-10 2019-12-17 尚明东 一种基于炼铜废渣提炼铁的方法
WO2021072562A1 (fr) * 2019-10-16 2021-04-22 Universidad De Concepcion Procédé zéro déchet qui utilise les scories finales de la fonte du cuivre pour produire des produits du commerce

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CN101886154B (zh) * 2010-07-02 2012-06-20 昆明理工大学 一种铜渣与铁矿石混合熔融还原制得低铜铁水的方法
CN101921919B (zh) * 2010-09-09 2011-12-21 山东天力干燥股份有限公司 一种熔融铜渣综合利用工艺及其系统
CN103060502B (zh) * 2013-01-14 2014-03-26 白银龙家丰金属渣综合利用有限公司 利用铜废渣一次性还原炼硅酸铁工艺
KR101295157B1 (ko) * 2013-04-30 2013-08-09 한국지질자원연구원 코발트 정광의 처리방법
CN103614607B (zh) * 2013-09-12 2016-01-13 昆明理工大学 一种含镍物料作用下热态铜渣熔融还原制不锈钢原料的方法
KR20160066804A (ko) * 2014-12-03 2016-06-13 주식회사 대창 칼슘 와이어를 사용한 구리합금 스크랩으로부터 납 제거 방법
JP6542560B2 (ja) * 2015-03-31 2019-07-10 Ｊｘ金属株式会社 非鉄製錬スラグの処理方法
CN112680600B (zh) * 2020-12-17 2022-06-10 有研资源环境技术研究院(北京)有限公司 一种从海绵铜渣中生物氧化回收铜和富集贵金属的工艺
WO2022164878A1 (fr) 2021-01-26 2022-08-04 Nucor Corporation Procédé et système de réduction de la teneur en métal non ferreux de ferrailles d'acier

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US1822588A (en) * 1929-01-14 1931-09-08 United Verde Copper Company Recovering copper from slags
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US1822588A (en) * 1929-01-14 1931-09-08 United Verde Copper Company Recovering copper from slags
US3157490A (en) * 1961-10-23 1964-11-17 Pullman Inc Method for refining of metals
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US4737186A (en) * 1985-05-31 1988-04-12 Outokumpu Oy Method for continuous reduction of molten metallurical slag in an electric furnace

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AGRAWAL A ET AL: "Solid waste management in non-ferrous industries in India", RESOUR. CONSERV. RECYCL.; RESOURCES, CONSERVATION AND RECYCLING SEPTEMBER 2004, vol. 42, no. 2, September 2004 (2004-09-01), pages 99 - 120, XP004518398 *
GONZALEZ C ET AL: "Reduction of Chilean copper slags: A case of waste management project", SCAND J METALL; SCANDINAVIAN JOURNAL OF METALLURGY APRIL 2005, vol. 34, no. 2, April 2005 (2005-04-01), pages 143 - 149, XP002383971 *
GORAI BIPRA ET AL: "Characteristics and utilisation of copper slag - A review", RESOUR. CONSERV. RECYCL.; RESOURCES, CONSERVATION AND RECYCLING NOV 1 2003, vol. 39, no. 4, 1 November 2003 (2003-11-01), pages 299 - 313, XP004464534 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2839045A1 (fr) * 2012-04-16 2015-02-25 Outotec (Finland) Oy Procédé pour le traitement de laitier de métallurgie de métaux non ferreux
EP2839045A4 (fr) * 2012-04-16 2016-01-13 Outotec Finland Oy Procédé pour le traitement de laitier de métallurgie de métaux non ferreux
EP2839045B1 (fr) 2012-04-16 2017-09-27 Outotec (Finland) Oy Procédé pour le traitement de laitier de métallurgie de métaux non ferreux
CN104185687A (zh) * 2012-09-07 2014-12-03 韩国地质资源研究院 通过物理和化学分离技术从包括铜、锌和铅的有色金属的冶炼过程中排放的有色金属废渣中分离和回收铁的方法
CN104185687B (zh) * 2012-09-07 2016-08-24 韩国地质资源研究院 从包括铜、锌和铅的有色金属的冶炼过程中排放的有色金属废渣中分离和回收铁的方法
WO2016004913A1 (fr) * 2014-07-11 2016-01-14 Aurubis Ag Procédé et dispositif de traitement d'une roche de silicate de fer
CN105838870A (zh) * 2016-05-24 2016-08-10 江苏省冶金设计院有限公司 制备还原铁的系统及其应用
CN107699698A (zh) * 2017-09-30 2018-02-16 江苏省冶金设计院有限公司 处理铜渣的方法
CN108728660A (zh) * 2018-06-20 2018-11-02 中国恩菲工程技术有限公司 铜渣贫化方法
CN108728660B (zh) * 2018-06-20 2020-07-17 中国恩菲工程技术有限公司 铜渣贫化方法
CN110578028A (zh) * 2019-10-10 2019-12-17 尚明东 一种基于炼铜废渣提炼铁的方法
WO2021072562A1 (fr) * 2019-10-16 2021-04-22 Universidad De Concepcion Procédé zéro déchet qui utilise les scories finales de la fonte du cuivre pour produire des produits du commerce

Also Published As

Publication number Publication date
AU2005338902A1 (en) 2007-06-14
MY144628A (en) 2011-10-14
US20070283785A1 (en) 2007-12-13
AU2005338902B2 (en) 2011-09-01
CA2632530A1 (fr) 2007-06-14
KR20080081258A (ko) 2008-09-09

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