US20100024601A1 - Method for obtaining copper and precious metals from copper-iron sulphide ores or ore concentrates - Google Patents

Method for obtaining copper and precious metals from copper-iron sulphide ores or ore concentrates Download PDF

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Publication number
US20100024601A1
US20100024601A1 US12/519,888 US51988807A US2010024601A1 US 20100024601 A1 US20100024601 A1 US 20100024601A1 US 51988807 A US51988807 A US 51988807A US 2010024601 A1 US2010024601 A1 US 2010024601A1
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Prior art keywords
copper
sulfides
iron
conversion
processes
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US12/519,888
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Alexander Beckmann
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    • 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
    • C22B15/0002—Preliminary treatment
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0002—Preliminary treatment
    • C22B15/001—Preliminary treatment with modification of the copper constituent
    • C22B15/0013—Preliminary treatment with modification of the copper constituent by roasting
    • C22B15/0017—Sulfating or sulfiding roasting

Definitions

  • the present invention relates to a process for extracting copper from copper/iron-sulfidic ores.
  • copper sulfide minerals By far the biggest part of the world's copper production (about 90%) is extracted from copper sulfide minerals.
  • copper sulfide minerals there may be mentioned, above all, chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ), cubanite (CuFeS 4 ), chalcosine (Cu 2 S), digenite (CugS 5 ), covelline (CuS), enargite (Cu 3 AsS 4 ), tennantite (Cu 12 AS 4 S 13 ) and tetrahedrite (Cu 12 Sb 4 S 13 ).
  • chalcopyrite CuFeS 2
  • bornite Cu 5 FeS 4
  • cubanite CuFeS 4
  • chalcosine Cu 2 S
  • digenite CugS 5
  • covelline CuS
  • enargite Cu 3 AsS 4
  • tennantite Cu 12 AS 4 S 13
  • tetrahedrite Cu 12 Sb
  • chalcopyrite is the most widespread mineral; therefore, it is of the greatest scientific and economic importance in the development of new extraction methods.
  • chalcopyrite and the above mentioned minerals are characterized by always containing deposited gold, silver, platinum metals and other rare metals as well as rare earths.
  • the copper-sulfidic and copper/iron-sulfidic minerals are extracted from ores, which are usually milled and concentrated by a flotation process to yield an ore concentrate, whereby a substantial part of the silicates contained in the ground stock, in particular, is separated off.
  • WO 01/44524 describes a process for extracting copper from chalcopyrite-containing ores in which the chalcopyrite-containing ores are converted to covelline, pyrite and accompanying substances by the addition of sulfur and then copper is extracted by leaching steps of the microbiological or chemical type.
  • the plants are designed for a narrow range of the copper to iron ratio.
  • Process for extracting copper and precious metals from copper and iron bearing ores, ore concentrates or minerals comprising the following steps:
  • the copper and iron bearing ore, ore concentrate or mineral is converted to copper sulfides, e.g., covelline, and iron sulfides, e.g., pyrite, using sulfur and optionally additives.
  • copper sulfides e.g., covelline
  • iron sulfides e.g., pyrite
  • iron sulfides and copper sulfides are physically separated at least partially at first.
  • At least 70 or 90%, more preferably at least 95 %, by weight of the iron sulfides are separated.
  • copper can be extracted from the thus purified copper sulfide using pyrometallurgical and hydrometallurgical processes known to the skilled person, avoiding the problems normally arising from the presence of admixed iron sulfides.
  • the separation of the copper sulfides and iron sulfides is effected by grinding at first.
  • the copper sulfides are thereby separated from the iron sulfide core.
  • the grinding process is effected in a rotary kiln or in a fluidized bed reactor in situ by adding grinding balls. In a preferred embodiment, this is followed by said at least partial separation by electrostatic processes, gravimetric processes, magnetic processes, air classification, grain size selection, a hydrocyclone, flotation processes or combinations thereof.
  • At least two separation methods are combined.
  • Another possibility is the selective heating of minerals with microwaves of different frequencies in order to alter the physical properties of individual minerals to enable their being separated off selectively, for example, by magnetic methods.
  • the ores employed according to the invention typically contain other metal components, especially rare earths, gold, silver, platinum, cobalt, nickel, zinc. Depending on the process control, these can migrate with either the copper sulfide phase or the iron sulfide phase, or be separated off in separate phases.
  • the precious metals for example, gold and silver
  • the copper-containing phase are preferably enriched almost completely by a diffusion process and thus can also be recovered almost completely among the other copper-sulfidic minerals particularly easily.
  • the copper sulfides obtained can be used in pyrometallurgical or hydrometallurgical copper extraction.
  • the pyrometallurgical processing includes a step referred to as “smelting”.
  • oxygen is blown into the molten material so that the following reactions proceed:
  • the thus obtained Cu is then typically freed from excess oxygen by adding reducing agents. Subsequently, electrorefining may also be used.
  • the iron sulfides obtained may be used for preparing iron; it is also possible to use them for adjusting the desired content of iron sulfides in copper extraction by adding iron sulfides, especially in the pyrometallurgical, but also in the hydrometallurgical extraction of copper.
  • the reaction is performed in an inert atmosphere, preferably in a nitrogen atmosphere, but also in argon or in a mixture of the inert gases. Flue gas may also be used, preferably SO 2 .
  • the conversion is performed in a continuous process, preferably in a three-chamber system.
  • Typical reaction times are around 5 min to 24 h, preferably 5 min to 12 h, or 15 min to 24 h, or 0ö.5 h to 24 h, especially from 5 to 90 or from 5 to 60 min.
  • the temperature is preferably ⁇ 500° C., more preferably ⁇ 475° C., most preferably ⁇ 450° C.
  • a temperature of from 400 to 450° C. is particularly preferred.
  • the starting materials can be selected from copper-containing ores, ore concentrates or minerals, such as chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ), cubanite (CuFeS 4 ), chalcosine (Cu 2 S), digenite (Cu 9 S 5 ), covelline (CuS) and mixtures thereof.
  • chalcopyrite CuFeS 2
  • bornite Cu 5 FeS 4
  • cubanite CuFeS 4
  • chalcosine Cu 2 S
  • digenite Cu 9 S 5
  • covelline CuS
  • the amount of sulfur employed can be stoichiometric, half-stoichiometric or catalytic.
  • the copper-containing sulfides covelline, chalcosine, digenite, bornite or the iron sulfides pyrite or pyrrhotite can be obtained.
  • FIGS. 1 a and b show the conversion of an ore by the converting step employed according to the invention.
  • FIG. 1 a shows a chalcopyrite-containing ore.
  • FIG. 1 b shows the converted ore: a pyrite core with a coat of covelline.
  • FIGS. 2 a and b also show the conversion of an ore by the converting step employed according to the invention.
  • FIG. 2 a The precious metals silver and gold are uniformly distributed before the treatment with sulfur.
  • FIG. 2 b Enrichment of the precious metals silver and gold in the copper sulfide after the conversion with sulfur.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Catalysts (AREA)
US12/519,888 2006-12-18 2007-12-18 Method for obtaining copper and precious metals from copper-iron sulphide ores or ore concentrates Abandoned US20100024601A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP06126410.7 2006-12-18
EP06126410 2006-12-18
EP07112232.9 2007-07-11
EP07112232 2007-07-11
PCT/EP2007/064147 WO2008074805A1 (de) 2006-12-18 2007-12-18 Verfahren zur gewinnung von kupfer und edelmetallen aus kupfereisensulfidischen erzen oder erzkonzentraten

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US20100024601A1 true US20100024601A1 (en) 2010-02-04

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US12/519,888 Abandoned US20100024601A1 (en) 2006-12-18 2007-12-18 Method for obtaining copper and precious metals from copper-iron sulphide ores or ore concentrates

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US (1) US20100024601A1 (de)
CL (1) CL2007003683A1 (de)
PE (1) PE20081242A1 (de)
WO (1) WO2008074805A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012201921A (ja) * 2011-03-24 2012-10-22 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2013087358A (ja) * 2011-10-21 2013-05-13 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2013209718A (ja) * 2012-03-30 2013-10-10 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2014156624A (ja) * 2013-02-15 2014-08-28 Jx Nippon Mining & Metals Corp 銅精鉱を得る方法
CN105223338A (zh) * 2015-10-29 2016-01-06 陕西省地质矿产实验研究所 一种伴生钴的铜镍矿中镍和钴的化学物相分析方法
US20180044226A1 (en) * 2016-08-11 2018-02-15 Boe Technology Group Co., Ltd. Method for strengthening edge of article, glass, and display apparatus
CN109214415A (zh) * 2018-07-19 2019-01-15 西安建筑科技大学 一种矿石破碎研磨效果评判方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5385235B2 (ja) * 2010-09-07 2014-01-08 Ｊｘ日鉱日石金属株式会社 銅精鉱の処理方法
CN105327771B (zh) * 2015-12-04 2017-06-23 云南锡业股份有限公司卡房分公司 一种含铜硫精矿的细磨及综合回收利用选矿工艺方法
CN111921693B (zh) * 2020-08-10 2021-04-27 清华大学 一种综合回收金属尾矿中铜、铁矿物的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580541A (en) * 1947-12-29 1952-01-01 Newton L Hall Rotary grinding or drying mill
US3554510A (en) * 1967-09-18 1971-01-12 Carlos Arrizaga Rotary multitubular kiln for roasting molybdenite and similar sulfides
US3780860A (en) * 1971-05-17 1973-12-25 Stephan Chem Co Flotation of copper sulfide ores
US6592644B2 (en) * 1999-12-14 2003-07-15 Alexander Beckmann Sulfidization of sulfide ores for hydrometallurgical extraction of copper and other metals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1050767A (en) * 1975-03-17 1979-03-20 Stephen P. Beaton Treatment of chalcopyrite
RU2149709C1 (ru) * 1998-12-01 2000-05-27 Баков Антон Алексеевич Способ переработки окисленных медных руд

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580541A (en) * 1947-12-29 1952-01-01 Newton L Hall Rotary grinding or drying mill
US3554510A (en) * 1967-09-18 1971-01-12 Carlos Arrizaga Rotary multitubular kiln for roasting molybdenite and similar sulfides
US3780860A (en) * 1971-05-17 1973-12-25 Stephan Chem Co Flotation of copper sulfide ores
US6592644B2 (en) * 1999-12-14 2003-07-15 Alexander Beckmann Sulfidization of sulfide ores for hydrometallurgical extraction of copper and other metals

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012201921A (ja) * 2011-03-24 2012-10-22 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2013087358A (ja) * 2011-10-21 2013-05-13 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2013209718A (ja) * 2012-03-30 2013-10-10 Jx Nippon Mining & Metals Corp 銅精鉱の処理方法
JP2014156624A (ja) * 2013-02-15 2014-08-28 Jx Nippon Mining & Metals Corp 銅精鉱を得る方法
CN105223338A (zh) * 2015-10-29 2016-01-06 陕西省地质矿产实验研究所 一种伴生钴的铜镍矿中镍和钴的化学物相分析方法
US20180044226A1 (en) * 2016-08-11 2018-02-15 Boe Technology Group Co., Ltd. Method for strengthening edge of article, glass, and display apparatus
CN109214415A (zh) * 2018-07-19 2019-01-15 西安建筑科技大学 一种矿石破碎研磨效果评判方法

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WO2008074805A1 (de) 2008-06-26
CL2007003683A1 (es) 2008-07-04
PE20081242A1 (es) 2008-11-01

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