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WO2007092219A1 - Procede de raffinage de metal non ferreux - Google Patents

Procede de raffinage de metal non ferreux Download PDF

Info

Publication number
WO2007092219A1
WO2007092219A1 PCT/US2007/002600 US2007002600W WO2007092219A1 WO 2007092219 A1 WO2007092219 A1 WO 2007092219A1 US 2007002600 W US2007002600 W US 2007002600W WO 2007092219 A1 WO2007092219 A1 WO 2007092219A1
Authority
WO
WIPO (PCT)
Prior art keywords
bath
ferrous metal
containing gas
oxygen
lance
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.)
Ceased
Application number
PCT/US2007/002600
Other languages
English (en)
Inventor
Adrian Deneys
Eric Mackenzie
William John Mahoney
Jin Liu
Anthony Edward Moline Warner
David Eric Hall
David Victor Mallette
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.)
Praxair Technology Inc
Original Assignee
Praxair Technology Inc
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 Praxair Technology Inc filed Critical Praxair Technology Inc
Priority to CA002641087A priority Critical patent/CA2641087A1/fr
Publication of WO2007092219A1 publication Critical patent/WO2007092219A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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
    • C22B15/0041—Bath smelting or converting in converters
    • 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
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
    • 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
    • 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
    • C22B23/06—Refining

Definitions

  • This invention relates to refining non- ferrous metal using oxygen to oxidize impurities in the molten metal .
  • a problem which arises in the refining of non-ferrous metal using oxygen to oxidize impurities in the molten metal is the formation of accretions on the surface of the lance from which the oxygen is injected into the refining vessel .
  • These accretions comprise solidified material from the headspace of the refining vessel which solidify on the face of the lance due to the relatively cold temperature of the lance which results from water-cooling and the oxygen passing through the lance.
  • These accretions disturb the flow of oxygen from the lance causing some of the oxygen to be deflected away from the bath. This has three very detrimental effects. First a significant portion of the oxygen is not delivered to the target area of the molten metal bath resulting in inefficient oxygen usage.
  • a method for refining non-ferrous metal comprising:
  • oxygen containing gas means a gaseous fluid having an oxygen concentration of at least 25 mole percent.
  • flame envelope means a combusting flow around and along one or more gas streams .
  • coherent jet means a gas stream which has little or no increase in diameter in its flow direction.
  • oxygen containing gas is passed from a lance into the headspace of the refining vessel at a velocity which may be- subsonic, sonic or supersonic but is not more than 3 Mach, preferably not more than 1.5 Mach and is most preferably within the range of from 0.835 Mach to 1.13 Mach.
  • a flame envelope around the gas stream proximate the lance face.
  • the flame envelope serves to melt solidified material and/or to keep material from solidifying on the lance face and thus aids in the attainment of the beneficial results of this invention, i.e. avoidance of detrimental effects of solidified material buildup on the oxygen lance in oxygen refining practice.
  • the flame envelope is formed preferably by providing fuel, such as natural gas or other hydrogen containing fuel , and oxidant, such as oxygen containing gas, from the lance into the vessel headspace.
  • the fuel and oxidant are provided respectively from two concentric rings of ports on the lance face around the central nozzle from which the refining oxygen containing gas is provided into the headspace, wherein the fuel is provided from the inner ring with respect to the nozzle and the oxidant is provided from the outer ring.
  • a single ring design may also be used.
  • the flame envelope provides for a second beneficial effect .
  • the flame envelope forms a barrier around and along the oxygen containing gas stream for a portion of the oxygen containing gas stream from the lance to the bath. This barrier keeps refining vessel gases in the headspace from passing into the oxygen containing gas stream.
  • the oxygen containing gas stream forms a coherent jet for at least a portion of the distance from the lance to the top surface of the molten metal bath. This enables the oxygen containing gas to impact the bath with greater force and purity than would otherwise be the case and this results in improved contact of the oxygen containing gas with the bath which in turn enables more efficient oxygen reaction with the bath constituents and better overall refining results.
  • the application of the flame envelope or flame shroud can allow the oxygen lance to be operated at greater lance to bath distances than would otherwise be the case.
  • the method of this invention may be employed to refine many non-ferrous or base metals among which are copper, nickel, lead, zinc and tin. It is understood that there may be small amounts of ferrous metal in the bath of non-ferrous metal refined in the method of this invention.
  • the invention is particularly useful for the refining of copper wherein oxygen is employed to react with sulfur in the molten copper to produce sulfur dioxide which is then removed from the copper. It is in conjunction with this particularly preferred application and also with reference to the Drawing that the invention will be further described in detail. [0013] Referring now to the Figure there is shown refining vessel 1 which has a refractory lining 4 and which contains a bath 2 of copper and has a headspace 3 above the bath.
  • At least one oxygen lance 10 is employed to provide oxygen containing gas into the headspace .
  • Oxygen containing gas within the requisite velocity range is passed out of the lance into headspace 3 to form oxygen containing gas stream 12.
  • the oxygen from the oxygen containing gas stream reacts with material in the bath to oxidize that material .
  • the oxygen reacts with sulfur in the molten copper bath to form sulfur dioxide which then bubbles out from the bath and is removed from the refining vessel .
  • the molten bath is agitated through the injection of a gas 15 from below the surface of the bath through one or more injection devices 14.
  • gases which may be employed as mixing gas 15 one can name oxygen, nitrogen, argon, steam and mixtures thereof.
  • the injection device 14 may be any suitable injection device such as a tuyere or a porous plug.
  • the inert gas flows upward from the injection device in a bubble plume 16 and serves to mix the molten metal bath to counteract stratification and to enhance the efficiency of the refining operation.
  • the mixing gas which rises through, the molten metal bath may form a continuous eye of freshly exposed bath material composed of solidified or semi-solidified material 17 on the surface of the bath above the injection device from which the mixing gas was provided into the bath.
  • one or more oxygen containing gas lances are positioned such that the oxygen containing gas stream from that lance is directed toward and impacts the agitated area of the bath such as at the eye .
  • the coherent jet of oxygen containing gas is not required to penetrate deeply into the bath for improved contact and reaction with the bath and therefore can operate efficiently at low Mach number supply conditions .

Landscapes

  • 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)

Abstract

La présente invention concerne un procédé de raffinage d'un métal non ferreux dans lequel un flux de gaz contenant de l'oxygène est fourni à partir d'une lance (10) dans l'espace de tête (3) d'un récipient de raffinage (1) pour un passage dans le bain de métal à l'état fondu (2) dans le récipient de raffinage, et un panache de flamme (13) est fourni autour et le long du flux de gaz contenant de l'oxygène (12) sur une partie de sa longueur, le panache de flamme servant simultanément à empêcher la formation d'accrétions sur le côté de la lance et à maintenir cohérent le flux de gaz contenant de l'oxygène.
PCT/US2007/002600 2006-02-02 2007-01-30 Procede de raffinage de metal non ferreux Ceased WO2007092219A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002641087A CA2641087A1 (fr) 2006-02-02 2007-01-30 Procede de raffinage de metal non ferreux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/345,281 US20070175298A1 (en) 2006-02-02 2006-02-02 Method for refining non-ferrous metal
US11/345,281 2006-02-02

Publications (1)

Publication Number Publication Date
WO2007092219A1 true WO2007092219A1 (fr) 2007-08-16

Family

ID=38169387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/002600 Ceased WO2007092219A1 (fr) 2006-02-02 2007-01-30 Procede de raffinage de metal non ferreux

Country Status (3)

Country Link
US (1) US20070175298A1 (fr)
CA (1) CA2641087A1 (fr)
WO (1) WO2007092219A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011103132A1 (fr) * 2010-02-16 2011-08-25 Praxair Technology, Inc. Système et procédé de raffinage d'anode en cuivre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1414769A (en) * 1973-02-07 1975-11-19 Centre Rech Metallurgique Converting copper materials
US4127408A (en) * 1975-05-22 1978-11-28 Klockner Humboldt Deutz Aktiengesellschaft Method for the continuous refinement of contaminated copper in the molten phase
US4519588A (en) * 1983-07-01 1985-05-28 Southwire Company Molten copper oxygenation apparatus
JPS6141729A (ja) * 1984-08-06 1986-02-28 Sumitomo Metal Mining Co Ltd 銅転炉または円筒型銅精製炉の操業方法
US5435833A (en) * 1993-09-30 1995-07-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment
EP1041341A1 (fr) * 1999-04-02 2000-10-04 Praxair Technology, Inc. Lance à jets cohérents multiples

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1424029A (fr) * 1964-01-06 1966-01-07 Union Carbide Corp Procédé et appareil pour introduire un courant de gaz de traitement dans un bain de métal en fusion
MY110307A (en) * 1990-11-20 1998-04-30 Mitsubishi Materials Corp Apparatus for continuous copper smelting
FI101813B1 (fi) * 1990-11-20 1998-08-31 Mitsubishi Materials Corp Menetelmä kuparin sulattamiseksi
US5449395A (en) * 1994-07-18 1995-09-12 Kennecott Corporation Apparatus and process for the production of fire-refined blister copper
US5658368A (en) * 1995-03-08 1997-08-19 Inco Limited Reduced dusting bath method for metallurgical treatment of sulfide materials
US5814125A (en) * 1997-03-18 1998-09-29 Praxair Technology, Inc. Method for introducing gas into a liquid
US7452401B2 (en) * 2006-06-28 2008-11-18 Praxair Technology, Inc. Oxygen injection method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1414769A (en) * 1973-02-07 1975-11-19 Centre Rech Metallurgique Converting copper materials
US4127408A (en) * 1975-05-22 1978-11-28 Klockner Humboldt Deutz Aktiengesellschaft Method for the continuous refinement of contaminated copper in the molten phase
US4519588A (en) * 1983-07-01 1985-05-28 Southwire Company Molten copper oxygenation apparatus
JPS6141729A (ja) * 1984-08-06 1986-02-28 Sumitomo Metal Mining Co Ltd 銅転炉または円筒型銅精製炉の操業方法
US5435833A (en) * 1993-09-30 1995-07-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment
EP1041341A1 (fr) * 1999-04-02 2000-10-04 Praxair Technology, Inc. Lance à jets cohérents multiples

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BUSTOS A.A., BRIMACOMBE J.K. AND RICHARDS G.G.: "Accretion growth at the tuyeres of a Peirce-Smith copper converter", CANADIAN METALLURGICAL QUARTERLY, vol. 27, no. 1, 1988, pages 7 - 21, XP009085742 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011103132A1 (fr) * 2010-02-16 2011-08-25 Praxair Technology, Inc. Système et procédé de raffinage d'anode en cuivre
JP2013519796A (ja) * 2010-02-16 2013-05-30 プラクスエア・テクノロジー・インコーポレイテッド 銅陽極精錬システム及び方法
US8623114B2 (en) 2010-02-16 2014-01-07 Praxair Technology, Inc. Copper anode refining system and method
RU2573846C2 (ru) * 2010-02-16 2016-01-27 Праксайр Текнолоджи, Инк. Система и способ анодного рафинирования меди

Also Published As

Publication number Publication date
US20070175298A1 (en) 2007-08-02
CA2641087A1 (fr) 2007-08-16

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