US20050199095A1 - Method for producing blister copper - Google Patents

Method for producing blister copper Download PDF

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Publication number
US20050199095A1
US20050199095A1 US10/517,506 US51750604A US2005199095A1 US 20050199095 A1 US20050199095 A1 US 20050199095A1 US 51750604 A US51750604 A US 51750604A US 2005199095 A1 US2005199095 A1 US 2005199095A1
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United States
Prior art keywords
smelting furnace
slag
copper
reactor
white metal
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Abandoned
Application number
US10/517,506
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English (en)
Inventor
Pekka Hanniala
Ilkka Kojo
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Metso Outotec Oyj
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Outokumpu Oyj
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Publication date
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Assigned to OYJ, OUTOKUMPU reassignment OYJ, OUTOKUMPU ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANNIALA, PEKKA, KOJO, ILKKA
Publication of US20050199095A1 publication Critical patent/US20050199095A1/en
Assigned to OUTOKUMPU TECHNOLOGY OY reassignment OUTOKUMPU TECHNOLOGY OY CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: OUTOKUMPU OYJ
Abandoned legal-status Critical Current

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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
    • 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
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0045—Bath smelting or converting in muffles, crucibles, or closed vessels
    • 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
    • C22B15/0028—Smelting or converting
    • C22B15/0047—Smelting or converting flash smelting or converting

Definitions

  • the invention relates to a method defined in claim 1 for producing blister copper.
  • the primary function of slag is to collect in a fluid form that can be tapped all iron oxides and silicatic and oxidic ingredients of the gangue created in the smelting process.
  • slag is cooled, crushed and flotated in order to recover the copper, or it is treated in reducing electric furnace processes.
  • the matte phase which generally is further treated in converting, there is obtained 50-70 percentages of copper.
  • the iron contained by the matte phase is oxidized when blasting oxygen in the melt and forms, together with the added silica sand, fajalite slag that in the initial step of the converting process floats in the reactor on the surface of the white metal that is rich in copper.
  • the white metal contains 70-80 percentages of copper.
  • blister copper the copper content whereof is of the order 99 percentages.
  • the slag still contains 5-10 percentages of copper, which is recovered by flotation and by feeding the slag concentrate that is rich in copper back into the flash smelting furnace or by treating the slag in reducing conditions for example in an electric furnace.
  • blister copper i.e. blister copper from sulfidic concentrate in one process step in a suspension reactor
  • the biggest problem here is that in said process, there is created a lot of slag, and also a large amount of copper is collected in this slag.
  • the treatment of slag in order to recover the copper contained therein causes extra expenses for the process.
  • the copper content in the concentrate is sufficiently high, typically at least 37 percentages by weight, it is economically profitable to produce blister copper in one process step. If the concentrate contains only slight amounts of iron or other slag-forming components, in which case the amount of created slag is not so high, also the processing of a concentrate with a lower copper content is profitable.
  • blister copper there is generally needed a two-step slag cleaning for the created slag in order to obtain a sufficiently high yield for the recovered copper.
  • FIG. 1 (INSKO 261608 VII, page 9), there is illustrated a sulfur-oxygen potential diagram for a Cu—Fe—S—O—SiO 2 system at the temperature 1300° C.
  • contents of various phases occurring in the copper smelting process in different conditions. From the figure it can be seen that when white metal is present, the copper content of the respective slag is lower than with a slag where the blister copper is in balance.
  • the object of the present invention is to eliminate some of the drawbacks of the prior art. Another object of the invention is to prevent the creation of a slag with a high copper content in the production of blister copper.
  • the invention is characterized by what is set forth in the preamble of claim 1 .
  • Other embodiments of the invention are characterized by what is set forth in the other claims.
  • the method according to the invention for producing blister copper has several advantages.
  • concentrate, flux and oxygen-enriched air are together fed into a suspension smelting furnace, such as a flash smelting furnace, so that there are created at least two molten phases, a white metal phase and a slag phase, and the white metal is oxidized after the suspension smelting furnace at least in one oxidizing reactor.
  • the operations in the suspension smelting furnace are advantageously carried out in conditions that provide for the creation of white metal, which means that the oxygen potential in the furnace is within the range 10 ⁇ 7 -10 ⁇ 6 and the sulfur dioxide partial pressure is within the range 0.2-1.
  • White metal is essentially composed of copper (70-80%) and sulfur.
  • the white metal created in the smelting does not substantially contain any slagging components.
  • the white metal is tapped out of the furnace either in continuous operation or in batches, in order to be oxidized in an oxidizing reactor, where the sulfur contained in the white metal is oxidized by using oxygen-enriched air, so that there are created sulfur dioxide and blister copper, but hardly any slag.
  • the oxidizing reactor is arranged in a stationary fashion in connection with the suspension smelting furnace.
  • the oxidizing reactor is connected to the suspension smelting furnace by a closed melt launder that provides for the transferring of the melt.
  • the oxidizing reactor is preferably a surface blasting reactor.
  • the oxidizing reactor is an injection reactor, by which also white metal in a solid state can advantageously be melted by injecting it into the melt together with oxidizing gas.
  • the employed oxidizing reactor is advantageously for example of the type Ausmelt, Isasmelt or Mitsubishi.
  • Slag is tapped separately from the suspension smelting furnace and treated, according to a preferred embodiment of the invention, in an electric furnace in order to recover the copper content thereof.
  • slag is after the suspension smelting furnace treated in flotation in order to recover the copper content.
  • FIG. 1 A sulfur-oxygen potential diagram for a Cu—Fe—S—O—SiO 2 system at the temperature of 1300° C.
  • FIG. 2 a A process diagram of the process according to the invention.
  • FIG. 2 b A process diagram of a process according to another preferred embodiment of the invention.
  • FIG. 2 a illustrates the method according to the invention.
  • Now concentrate 5 , flux 6 and oxygen-enriched air 7 are together fed into a flash smelting furnace 1 , so that at the lower part 4 thereof there are created two molten phases, a white metal phase 11 and a slag phase 10 .
  • White metal 11 is oxidized after the flash smelting furnace in one oxidizing reactor 12 , and there is created blister copper 15 .
  • blister copper 15 In addition to white metal and slag, in the flash smelting furnace there is created a small amount of blister copper, which also is conducted into the oxidizing reactor in 12 .
  • the process gases created in the flash smelting furnace 1 are conducted via the furnace uptake shaft 2 to a waste heat boiler 8 , where the created dusts 9 are recirculated back into the flash smelting furnace, and the gases 17 are conducted to further treatment.
  • the white metal 11 is tapped out of the furnace 1 either in continuous operation or in batches into the oxidizing reactor 12 , where the sulfur contained in the white metal is oxidized by oxygen-enriched air 16 , so that there are created sulfur dioxide and blister copper 15 , but not slag.
  • the oxidizing reactor 12 is arranged to be installed in connection with the flash smelting furnace in a stationary fashion. In another embodiment of the invention, illustrated in FIG.
  • the oxidizing reactor 12 is connected by means of a melt launder 13 directly to the flash smelting furnace.
  • the slag 10 created in the flash smelting furnace 1 is conducted into slag treatment 14 , alternatively either into an electric furnace or into flotation in order to recover the copper content of the slag.
  • the oxidizing reactor is preferably a surface blasting or injection reactor, in which case also solid white metal can advantageously be melted by injecting it into the melt together with the oxidizing gas.
  • the oxidizing reactor is preferably for example of the type Ausmelt, Isasmelt or Mitsubishi.
  • the slag is treated in a slag enrichment plant, so that the rate of created slag is 8,844 kg/h (content 46% Cu, 25% Fe), and said slag is then fed back into the flash smelting furnace together with the concentrate.
  • the created white metal is treated in an oxidizing reactor, into which there is fed technical oxygen at 4,328 Nm 3 /h and air at 18,979 Nm 3 /h. Now there is created blister copper at 49,274 kg/h (content 98% Cu, 0.04% Fe) and a small amount of slag (1 ton/h, content 50% Cu, 27% Fe). The slag is granulated and fed back into the flash smelting furnace.
  • the total quantity of copper recirculated back into the flash smelting furnace in slag concentrate and in the slag from the oxidizing reactor is 4,575 kg Cu, which corresponds to about 9% of the whole copper quantity contained in the concentrate. If the concentrate were smelted directly into blister, the slag quantity would be about 130 t/h, and it would contain even more than 50% of the total copper quantity contained in the concentrate.
US10/517,506 2002-06-11 2003-06-02 Method for producing blister copper Abandoned US20050199095A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20021114 2002-06-11
FI20021114A FI116069B (fi) 2002-06-11 2002-06-11 Menetelmä raakakuparin valmistamiseksi
PCT/FI2003/000432 WO2003104504A1 (en) 2002-06-11 2003-06-02 Method for producing blister copper

Publications (1)

Publication Number Publication Date
US20050199095A1 true US20050199095A1 (en) 2005-09-15

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ID=8564117

Family Applications (1)

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US10/517,506 Abandoned US20050199095A1 (en) 2002-06-11 2003-06-02 Method for producing blister copper

Country Status (16)

Country Link
US (1) US20050199095A1 (fi)
EP (1) EP1511868A1 (fi)
JP (1) JP2005536629A (fi)
KR (1) KR20050007600A (fi)
CN (1) CN100385024C (fi)
AR (1) AR040256A1 (fi)
AU (1) AU2003232264A1 (fi)
BR (1) BR0311758A (fi)
CA (1) CA2488398A1 (fi)
EA (1) EA007445B1 (fi)
FI (1) FI116069B (fi)
MX (1) MXPA04012084A (fi)
PE (1) PE20040137A1 (fi)
PL (1) PL372533A1 (fi)
RS (1) RS107704A (fi)
WO (1) WO2003104504A1 (fi)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090226284A1 (en) * 2004-01-15 2009-09-10 Ilkka Kojo Supply system for suspension smelting furnace
US20090293678A1 (en) * 2008-06-02 2009-12-03 Tatsuya Motomura Copper smelting method
CN102605191A (zh) * 2012-04-16 2012-07-25 阳谷祥光铜业有限公司 一种铜精矿直接生产粗铜的方法
US9725784B2 (en) 2012-06-21 2017-08-08 Lawrence F. McHugh Production of copper via looping oxidation process

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007526826A (ja) 2004-03-05 2007-09-20 メルク　パテント　ゲゼルシャフト　ミット　ベシュレンクテル　ハフトング 液晶ディスプレイの使用およびそれらのリサイクル方法
CA2565643C (en) * 2006-06-28 2011-08-02 Nippon Mining & Metals Co., Ltd. Operation method of copper smelting
FI120157B (fi) * 2007-12-17 2009-07-15 Outotec Oyj Menetelmä kuparirikasteen jalostamiseksi
CN102876902A (zh) * 2012-10-18 2013-01-16 铜陵有色金属集团股份有限公司金冠铜业分公司 一种铜精矿闪速-熔池复合熔炼方法及奥托昆普闪速炉
FI125793B (fi) 2014-05-14 2016-02-15 Outotec Finland Oy Menetelmä kuparia sisältävän materiaalin konvertoimiseksi
JP6466869B2 (ja) * 2016-02-29 2019-02-06 パンパシフィック・カッパー株式会社 銅製錬炉の操業方法
BE1025772B1 (nl) * 2017-12-14 2019-07-08 Metallo Belgium Verbetering in koper-/tin-/loodproductie

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980470A (en) * 1974-03-30 1976-09-14 National Research Institute For Metals Method of spray smelting copper
US4030915A (en) * 1974-11-11 1977-06-21 Outokumpu Oy Process for producing raw copper continuously in one stage from unrefined sulfidic copper concentrate or ore
US4349383A (en) * 1979-10-11 1982-09-14 Klockner-Humboldt-Deutz Ag Method for the pyrometallurgical production of copper
US4416690A (en) * 1981-06-01 1983-11-22 Kennecott Corporation Solid matte-oxygen converting process
US4470845A (en) * 1983-01-05 1984-09-11 Newmont Mining Corporation Continuous process for copper smelting and converting in a single furnace by oxygen injection
US4528033A (en) * 1983-06-15 1985-07-09 Outokumpu Oy Method for producing blister copper
US5007959A (en) * 1988-04-29 1991-04-16 Noranda Inc. Process for converting of solid high-grade copper matte
US5194213A (en) * 1991-07-29 1993-03-16 Inco Limited Copper smelting system
US6761749B1 (en) * 2000-01-04 2004-07-13 Outokumpu Oyj Method for the production of blister copper in suspension reactor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1067113C (zh) * 1998-08-08 2001-06-13 徐有生 铜、镍硫化矿无污染火冶法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980470A (en) * 1974-03-30 1976-09-14 National Research Institute For Metals Method of spray smelting copper
US4030915A (en) * 1974-11-11 1977-06-21 Outokumpu Oy Process for producing raw copper continuously in one stage from unrefined sulfidic copper concentrate or ore
US4349383A (en) * 1979-10-11 1982-09-14 Klockner-Humboldt-Deutz Ag Method for the pyrometallurgical production of copper
US4416690A (en) * 1981-06-01 1983-11-22 Kennecott Corporation Solid matte-oxygen converting process
US4470845A (en) * 1983-01-05 1984-09-11 Newmont Mining Corporation Continuous process for copper smelting and converting in a single furnace by oxygen injection
US4528033A (en) * 1983-06-15 1985-07-09 Outokumpu Oy Method for producing blister copper
US5007959A (en) * 1988-04-29 1991-04-16 Noranda Inc. Process for converting of solid high-grade copper matte
US5194213A (en) * 1991-07-29 1993-03-16 Inco Limited Copper smelting system
US6761749B1 (en) * 2000-01-04 2004-07-13 Outokumpu Oyj Method for the production of blister copper in suspension reactor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090226284A1 (en) * 2004-01-15 2009-09-10 Ilkka Kojo Supply system for suspension smelting furnace
US8956564B2 (en) * 2004-01-15 2015-02-17 Outotec Oyj Supply system for suspension smelting furnace
US20090293678A1 (en) * 2008-06-02 2009-12-03 Tatsuya Motomura Copper smelting method
US8382879B2 (en) 2008-06-02 2013-02-26 Pan Pacific Copper Co., Ltd. Copper smelting method
CN102605191A (zh) * 2012-04-16 2012-07-25 阳谷祥光铜业有限公司 一种铜精矿直接生产粗铜的方法
US8771396B2 (en) 2012-04-16 2014-07-08 Xiangguang Copper Co., Ltd. Method for producing blister copper directly from copper concentrate
US9725784B2 (en) 2012-06-21 2017-08-08 Lawrence F. McHugh Production of copper via looping oxidation process

Also Published As

Publication number Publication date
CA2488398A1 (en) 2003-12-18
JP2005536629A (ja) 2005-12-02
CN100385024C (zh) 2008-04-30
FI20021114A (fi) 2003-12-12
AU2003232264A1 (en) 2003-12-22
RS107704A (en) 2007-04-10
EP1511868A1 (en) 2005-03-09
EA200401402A1 (ru) 2005-06-30
PE20040137A1 (es) 2004-05-05
BR0311758A (pt) 2005-03-08
MXPA04012084A (es) 2005-03-07
WO2003104504A1 (en) 2003-12-18
FI116069B (fi) 2005-09-15
CN1659293A (zh) 2005-08-24
KR20050007600A (ko) 2005-01-19
PL372533A1 (en) 2005-07-25
FI20021114A0 (fi) 2002-06-11
AR040256A1 (es) 2005-03-23
EA007445B1 (ru) 2006-10-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: OYJ, OUTOKUMPU, FINLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HANNIALA, PEKKA;KOJO, ILKKA;REEL/FRAME:016629/0959

Effective date: 20041029

AS Assignment

Owner name: OUTOKUMPU TECHNOLOGY OY, FINLAND

Free format text: CHANGE OF NAME;ASSIGNOR:OUTOKUMPU OYJ;REEL/FRAME:016775/0102

Effective date: 20051031

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION