EP0199441A1 - Fusion réductrice de sulfures et brûleur à cet usage - Google Patents

Fusion réductrice de sulfures et brûleur à cet usage Download PDF

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Publication number
EP0199441A1
EP0199441A1 EP86301519A EP86301519A EP0199441A1 EP 0199441 A1 EP0199441 A1 EP 0199441A1 EP 86301519 A EP86301519 A EP 86301519A EP 86301519 A EP86301519 A EP 86301519A EP 0199441 A1 EP0199441 A1 EP 0199441A1
Authority
EP
European Patent Office
Prior art keywords
concentrate
fuel
burner
conduit
bore
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.)
Withdrawn
Application number
EP86301519A
Other languages
German (de)
English (en)
Inventor
Malcolm Charles Evert Bell
Carlos Manuel Diaz
Hayden Davies
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.)
Vale Canada Ltd
Original Assignee
Vale Canada Ltd
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 Vale Canada Ltd filed Critical Vale Canada Ltd
Publication of EP0199441A1 publication Critical patent/EP0199441A1/fr
Withdrawn legal-status Critical Current

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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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • 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
    • C22B15/0036—Bath smelting or converting in reverberatory furnaces
    • 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
    • C22B15/0052—Reduction smelting or converting
    • 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
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/02—Obtaining nickel or cobalt by dry processes
    • C22B23/025—Obtaining nickel or cobalt by dry processes with formation of a matte or by matte refining or converting into nickel or cobalt, e.g. by the Oxford process

Definitions

  • the instant invention relates to the pyrometallurgical processing of metal sulfide ores or concentrates in general and, more particularly, to a more efficient method and burner apparatus that minimize the generation of sulfur dioxide (S0 2 ) in a reverberatory smelting vessel.
  • the first pyrometallurgical step is the oxidation of iron which ultimately leads to its extraction via slag removal. This process results in a matte rich in nickel, copper and other desired metallic values.
  • One such smelting method that accomplishes this end. utilizes a reverberatory furnance.
  • a fossil fuel coal, oil or gas
  • the furnace is a long rectangular structure with burners arranged at one end. Flames from the burners are played over the bottom of the furnace (hearth) wherein a large portion of the heat in the combustion gas radiates directly to the charge lying on the hearth below. Simultaneously, a remainder of the heat from the burners is radiated from and reflected off the roof and walls - hence it "reverberates" in the furnance.
  • reverberatory smelting requires large quantities of fuel and results in the formation of nitrous oxides ( NOx ) .
  • the charge fed into the furnace is the sulfide containing calcine feed eminating from a roaster.
  • the charge is fed through a series of vertical fettling pipes that pass through the roof and dropped along the sides of the furnace. As it melts, the charge flows into the hearth and forms the characteristic slag and matte.
  • a silicious flux to bind up the iron oxide (formed in the roaster) is added as necessary.
  • the slag (rich in undesirable iron containing compounds) floats above the matte (rich in desirable nickel, copper and other metallic compounds).
  • the slag and matte are separated by appropriate tapping procedures for further treatment in convertors.
  • An improved variation on this theme is the oxy-fuel reverb furnace.
  • a plurality of burners essentially parallel to inner walls are mounted in the roof. Pure oxygen is mixed with-the fuel to cause combustion. The resultant flame impinges directly on the charge below. This configuration increases furnace throughput and decreases fuel consumption. The feed is independent of the burners.
  • a process and a burner adapted therefor wherein a nickel and/or copper sulfide concentrate is passed through the central bore of a burner extending into a oxy-fuel reverberatory furnace and is contacted with a gaseous fuel rather than oxygen prior to combustion.
  • the sulfide concentrate may be a mixture of nickel or copper sulfide concentrate and roasted nickel or copper concentrate (calcines) or it may be partially roasted nickel or copper concentrate.
  • This flame smelting technique minimizes the oxidation of sulfidic sulfur to S0 2 in the smelting vessel and improves fuel efficiencies and throughput without being deleterious to the refractories lining the vessel walls. In addition, NO x formation is reduced.
  • FIG. 1 and 2 there is shown a burner 10 adapted for installation into a reverberatory furnace (not shown).
  • the burner 10 includes feed inlet 12.
  • the inlet 12 intersects central bore 14 which extends through the burner 10 to combustion zone 16.
  • Fuel conduit 18 circumscribes the bore 14 and includes inlet 20.
  • Oxygen conduit 22 circumscribes the fuel conduit 18 and includes inlet 24.
  • Cooling jacket 26 circumscribes the oxygen conduit 22. Cooling fluid (usually water) is introduced through inlet 28 wherein it courses through the jacket 26 before exiting from outlet 30.
  • Mounting plate 32 serves as a mounting surface to affix the burner 10 to the furnace. Inspection port 34 permits visual observation of the burner and flame.
  • the burner 10 is ignited in a usual fashion.
  • flame smelting that is, feeding the sulfide containing calcine material through the burner 10 into the flame increases the smelting efficiency of a reverberatory vessel. In this fashion, the individual particles are more fully exposed to the high temperature of the flame. The much impraved heat transfer conditions permit increased throughput without any detriment to refractory life. Moreover, the fuel itself partially acts as a temperature depressant by decreasing the flame temperature and thus reducing the formation of NO . x
  • the burner 10 initially reduces the exposure of the feed to the oxygen by channeling the fuel between the oxygen and the feed.
  • the fuel shields and insulates the feed from the oxygen thus minimizing the oxidation of sulfudic sulfur to S0 2 in the furnace.
  • the velocity of the feed and gas are on the order of 20-25 meters/second. This results in somewhat of a three ring concentric laminar flow as the various components emerge from the burner 10 into the combustion zone 16.
  • the oxygen, shielded from the feed by the fuel sees the fuel and is consumed during the resulting combustion reaction before it has the opportunity to oxidize the feed.
  • the close proximity of the feed to the heat generated by the combustion reaction greatly increases the efficiency of the process while reducing the need for fuel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP86301519A 1985-03-04 1986-03-04 Fusion réductrice de sulfures et brûleur à cet usage Withdrawn EP0199441A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA475663 1985-03-04
CA475663 1985-03-04

Publications (1)

Publication Number Publication Date
EP0199441A1 true EP0199441A1 (fr) 1986-10-29

Family

ID=4129951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86301519A Withdrawn EP0199441A1 (fr) 1985-03-04 1986-03-04 Fusion réductrice de sulfures et brûleur à cet usage

Country Status (2)

Country Link
EP (1) EP0199441A1 (fr)
JP (1) JPS62124236A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478322A1 (fr) * 1990-09-26 1992-04-01 Johannesburg Consolidated Investment Company Limited Procédé de traitement pyrométallurgique d'un matière de charge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025600A1 (fr) * 1968-12-07 1970-09-11 Mitsubishi Metal Mining Co Ltd
DE2203227A1 (de) * 1972-01-24 1973-10-11 Inst De Proiectari Si Cercetar Verfahren und vorrichtung zur trennung von blei, kupfer und zink aus zink- und bleisulfidkonzentraten mit hohem gehalt an kupfer und aus kupfersulfidkonzentraten mit hohen blei- und zinkgehalten
US3796568A (en) * 1971-12-27 1974-03-12 Union Carbide Corp Flame smelting and refining of copper
US3932170A (en) * 1974-08-19 1976-01-13 The United States Of America As Represented By The Secretary Of The Interior Use of scavenger in recovery of metal values
US4260364A (en) * 1978-04-17 1981-04-07 The International Nickel Company Inc. Burner for flash smelting furnace
EP0028968A1 (fr) * 1979-10-31 1981-05-20 Canadian Liquid Air Ltd Air Liquide Canada Ltee Procédé de traitement d'un métal en bain fondu

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4920444A (fr) * 1972-06-19 1974-02-22

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025600A1 (fr) * 1968-12-07 1970-09-11 Mitsubishi Metal Mining Co Ltd
US3796568A (en) * 1971-12-27 1974-03-12 Union Carbide Corp Flame smelting and refining of copper
DE2203227A1 (de) * 1972-01-24 1973-10-11 Inst De Proiectari Si Cercetar Verfahren und vorrichtung zur trennung von blei, kupfer und zink aus zink- und bleisulfidkonzentraten mit hohem gehalt an kupfer und aus kupfersulfidkonzentraten mit hohen blei- und zinkgehalten
US3932170A (en) * 1974-08-19 1976-01-13 The United States Of America As Represented By The Secretary Of The Interior Use of scavenger in recovery of metal values
US4260364A (en) * 1978-04-17 1981-04-07 The International Nickel Company Inc. Burner for flash smelting furnace
EP0028968A1 (fr) * 1979-10-31 1981-05-20 Canadian Liquid Air Ltd Air Liquide Canada Ltee Procédé de traitement d'un métal en bain fondu

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478322A1 (fr) * 1990-09-26 1992-04-01 Johannesburg Consolidated Investment Company Limited Procédé de traitement pyrométallurgique d'un matière de charge
US5374299A (en) * 1990-09-26 1994-12-20 Johannesburg Consolidated Investment Company Limited Pyrometallurgical process for treating a feed material

Also Published As

Publication number Publication date
JPS62124236A (ja) 1987-06-05

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Inventor name: BELL, MALCOLM CHARLES EVERT

Inventor name: DIAZ, CARLOS MANUEL

Inventor name: DAVIES, HAYDEN