EP1521851A2 - Production directe de metaux et d'alliages affines - Google Patents

Production directe de metaux et d'alliages affines

Info

Publication number
EP1521851A2
EP1521851A2 EP03764006A EP03764006A EP1521851A2 EP 1521851 A2 EP1521851 A2 EP 1521851A2 EP 03764006 A EP03764006 A EP 03764006A EP 03764006 A EP03764006 A EP 03764006A EP 1521851 A2 EP1521851 A2 EP 1521851A2
Authority
EP
European Patent Office
Prior art keywords
hearth
carrier material
loop
zone
metal
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Withdrawn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
EP03764006A
Other languages
German (de)
English (en)
Inventor
Noel Alfred Warner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1521851A2 publication Critical patent/EP1521851A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/567—Manufacture of steel by other methods operating in a continuous way
    • 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
    • C22B23/021—Obtaining nickel or cobalt by dry processes by reduction in solid state, e.g. by segregation processes
    • 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
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • 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
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/66—Heat exchange
    • 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
    • Y02P10/25—Process efficiency

Definitions

  • This invention relates to thermal reduction of metal oxide materials, for example iron oxide ores such as haematite, metal oxide ores, e.g. nickel -laterite and chromite ores, and deepsea manganese nodules, for the purpose of recovering metallic values therefrom in a refined condition on a continuous basis.
  • metal oxide materials for example iron oxide ores such as haematite, metal oxide ores, e.g. nickel -laterite and chromite ores, and deepsea manganese nodules.
  • the present invention is also concerned with the treatment of steel plant fines, in-plant fines and other secondary materials generated during metallurgical and waste incineration operations.
  • Conduction within agglomerated materials is the principal heat transfer means even at very high temperatures and in the present case this is enhanced by metal not originally in the charge materials infiltrating into the charge layer as production progresses to enhance that produced by reduction. Also sintering phenomena which result ultimately in the formation of a metallised raft emerging from the far end of the arm cause a progressive increase in thermal conductivity the longer the material stays floating down the metallisation arm of the reduction loop. Direct contact with liquid metal eliminates the need for radiative heat transfer in the metallisation arm so there is no special requirement to provide geometric arrangements that ensure access to direct thermal radiation as this is no longer an issue as it is with current technology.
  • the mixed charge to the charge arm of the reducing loop is comprised principally of carbonaceous material, metal oxide material and usually a suitable flux, e.g. lime, limestone or dolomite with particle size requirements determined by preliminary laboratory testing.
  • a suitable flux e.g. lime, limestone or dolomite with particle size requirements determined by preliminary laboratory testing.
  • simple mechanical mixing of the constituents will be all that is required.
  • the metal oxide material incorporated within the composite mixed charge, which forms the layer floating on the molten carrier material, is subjected to reduction to produce the metal, and carbon monoxide is evolved above the surface of the molten carrier material and is preferably passed to the other treatment stages which may optionally include liquid metal based hot gas clean-up or other means of desulphurisation; boosting in pressure; staged partial combustion with oxygen to facilitate melting of the metallised raft and combustion of excess carbon therein; liquid slag formation; and decarburisation of the molten carrier material in at least one (preferably two) downstream melt circulation loops by top blowing and direct flame impingement mechanisms, before being passed to the heating zone of the reduction loop where combustion to carbon dioxide is finally completed.
  • the other treatment stages which may optionally include liquid metal based hot gas clean-up or other means of desulphurisation; boosting in pressure; staged partial combustion with oxygen to facilitate melting of the metallised raft and combustion of excess carbon therein; liquid slag formation; and decarburisation of the molten carrier material
  • R-H type snorkels 9 connected to vertical bodies 10 linked to each other by horizontal members 11 to form vacuum-tight refractory-lined vessels, which can function either as gas-lift pumps or siphons depending on whether or not an inert gas is injected into the upleg snorkels.
  • melt is drawn up into both snorkels 9 and the lower regions of the vertical bodies 10 and the horizontal members 11 in each unit to form a channel through which the melt traverses as it flows from one hearth to another along the horizontal member 11.
  • These vessels can be either lowered so that the snorkels 9 are immersed in the molten carrier materials or raised for stand-by or replacement with preheated units on a scheduled maintenance basis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture Of Iron (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

L'invention concerne un procédé de réduction de matériau d'oxyde métallique en métal consistant à réaliser une circulation forcée de matériau support fondu dans une boucle fermée comprenant à la suite une zone de réduction de charge sur un bras de la boucle, une combinaison de zone de désulfuration à l'état fondu et d'une zone de postcombustion ou de chauffage sur l'autre bras, à réduire l'oxyde métallique en métal solide grâce au matériau carboné contenu dans une charge composite mélangée d'oxyde métallique, de réducteur carboné et de fondant dans la zone de réduction, l'oxyde métallique et le réducteur carboné étant utilisés en proportions telles que le carbone du réducteur carboné est transformé en monoxyde de carbone, à faire réagir le monoxyde de carbone avec de l'oxygène en aval de la boucle d'affinage avant sa combustion complète dans la zone de chauffage à la surface du matériau support fondu de façon que la chaleur produite par la réaction soit transférée au matériau support fondu circulant vers la zone de réduction, à séparer un flottant métallisé du matériau support fondu par projection de ce fondant dans la première boucle d'affinage en vertu de la force de traînée exercée sur le fondant par le matériau support fondu avant que ce matériau ne circule vers la zone de chauffage de façon que la surface du matériau support fondu, dirigée vers la zone de chauffage, ne contienne sensiblement plus de matériau solide.
EP03764006A 2002-07-15 2003-07-15 Production directe de metaux et d'alliages affines Withdrawn EP1521851A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0216484.6A GB0216484D0 (en) 2002-07-15 2002-07-15 Direct production of refined metals and alloys
GB0216484 2002-07-15
PCT/GB2003/003065 WO2004007775A2 (fr) 2002-07-15 2003-07-15 Production directe de metaux et d'alliages affines

Publications (1)

Publication Number Publication Date
EP1521851A2 true EP1521851A2 (fr) 2005-04-13

Family

ID=9940543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03764006A Withdrawn EP1521851A2 (fr) 2002-07-15 2003-07-15 Production directe de metaux et d'alliages affines

Country Status (5)

Country Link
US (1) US20060162498A1 (fr)
EP (1) EP1521851A2 (fr)
AU (1) AU2003254456A1 (fr)
GB (1) GB0216484D0 (fr)
WO (1) WO2004007775A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0412105D0 (en) * 2004-05-29 2004-06-30 Warner Noel A Recovery of steel from contaminated scrap
EP1808472B1 (fr) * 2004-10-04 2012-09-12 JNC Corporation Composition à base de cristaux liquides et élément d' affichage à base de cristaux liquides
GB0615952D0 (en) * 2006-08-11 2006-09-20 Warner Noel A Radiative post combustion
US10099868B1 (en) * 2017-04-20 2018-10-16 Otto Kierulff Da Costa Set of water pipes with capsules for heavy cargo and irrigation transportation system
CN113528821B (zh) * 2019-07-29 2023-05-02 孙旭阳 利用单原子碳还原制备单质材料的方法
CN112850645B (zh) * 2021-02-08 2022-09-06 赛鼎工程有限公司 焦炉煤气深度净化制合成氨的系统及方法
CN114574651B (zh) * 2022-01-24 2023-05-05 山东大学 一种旋流铁壁熔融冶炼装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1046675A (en) * 1964-10-16 1966-10-26 Air Liquide Improvements in or relating to the production of steel
US4741770A (en) * 1985-04-03 1988-05-03 Cra Services Limited Zinc smelting process using oxidation zone and reduction zone
US4701217A (en) * 1986-11-06 1987-10-20 University Of Birmingham Smelting reduction
US5060913A (en) * 1989-08-30 1991-10-29 Regents Of The University Of Minnesota Integrated metallurgical reactor
GB9211052D0 (en) * 1992-05-23 1992-07-08 Univ Birmingham Synthetic rutile production
GB9305560D0 (en) * 1993-03-18 1993-05-05 Univ Birmingham Method of recovering zine
LU90273B1 (de) * 1998-08-11 2000-02-14 Wurth Paul Sa Verfahren zur thermischen Behandlung schwermetall-und eisenoxidhaltiger Reststoffe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004007775A2 *

Also Published As

Publication number Publication date
WO2004007775A3 (fr) 2004-04-29
AU2003254456A8 (en) 2004-02-02
US20060162498A1 (en) 2006-07-27
GB0216484D0 (en) 2002-08-21
WO2004007775A2 (fr) 2004-01-22
AU2003254456A1 (en) 2004-02-02

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