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AR060691A1 - Instalacion transportadora, combinacion de instalaciones y procedimiento para el acople de procedimientos metalurgicos - Google Patents

Instalacion transportadora, combinacion de instalaciones y procedimiento para el acople de procedimientos metalurgicos

Info

Publication number
AR060691A1
AR060691A1 ARP060105401A ARP060105401A AR060691A1 AR 060691 A1 AR060691 A1 AR 060691A1 AR P060105401 A ARP060105401 A AR P060105401A AR P060105401 A ARP060105401 A AR P060105401A AR 060691 A1 AR060691 A1 AR 060691A1
Authority
AR
Argentina
Prior art keywords
reduction
procedure
facilities
coupling
combination
Prior art date
Application number
ARP060105401A
Other languages
English (en)
Inventor
Hanspeter Ofner
Wilhem Schiffer
Harald Fischer
Ernst Oberndorfer
Original Assignee
Voest Alpine Ind Anlagen
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 Voest Alpine Ind Anlagen filed Critical Voest Alpine Ind Anlagen
Publication of AR060691A1 publication Critical patent/AR060691A1/es

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • C21B13/0093—Protecting against oxidation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/12—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or 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
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/527—Charging of the electric furnace
    • 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
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • 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
    • Y02P10/20—Recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Powder Metallurgy (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Chain Conveyers (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Manufacture Of Iron (AREA)

Abstract

La presente se refiere a una instalacion transportadora con elementos transportadores 1 para el transporte de materiales en terrones, en particular de materiales calientes, con una cubierta 2 para el resguardo del material transportado. Se presentan medidas pare la inertizacion. Además, la presente se refiere a una combinacion de instalaciones con una instalacion de reduccion 17 para la reduccion de oxidos en un proceso continuo, y un agregado de procesamiento 18 para la elaboracion de metal líquido en un proceso discontinuo, donde el producto de reduccion se conduce desde la instalacion de reduccion hacia el agregado de procesamiento. Asimismo, la presente se refiere a un procedimiento para el acople de un procedimiento de reduccion, para la reduccion de oxidos en un proceso continuo, procedimiento para la elaboracion de metal líquido en un proceso discontinuo, donde el producto de reduccion es conducido desde el procedimiento de reduccion al procedimiento de procesamiento para la elaboracion de metal líquido.
ARP060105401A 2005-12-07 2006-12-07 Instalacion transportadora, combinacion de instalaciones y procedimiento para el acople de procedimientos metalurgicos AR060691A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0195805A AT502904B1 (de) 2005-12-07 2005-12-07 Förderanlage, anlagenverbund und verfahren zur kopplung von metallurgischen verfahren

Publications (1)

Publication Number Publication Date
AR060691A1 true AR060691A1 (es) 2008-07-10

Family

ID=38016550

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP060105401A AR060691A1 (es) 2005-12-07 2006-12-07 Instalacion transportadora, combinacion de instalaciones y procedimiento para el acople de procedimientos metalurgicos

Country Status (19)

Country Link
US (2) US7858021B2 (es)
EP (1) EP1957679B1 (es)
JP (1) JP2009518254A (es)
KR (1) KR101430566B1 (es)
CN (1) CN101336302B (es)
AR (1) AR060691A1 (es)
AT (1) AT502904B1 (es)
AU (1) AU2006322336B2 (es)
BR (2) BRPI0619571B1 (es)
CA (1) CA2632075C (es)
EG (1) EG26374A (es)
MX (1) MX344301B (es)
MY (1) MY153274A (es)
PL (1) PL1957679T3 (es)
RU (1) RU2424324C2 (es)
TW (1) TWI394840B (es)
UA (1) UA92769C2 (es)
WO (1) WO2007065582A2 (es)
ZA (1) ZA200805048B (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT502904B1 (de) 2005-12-07 2008-02-15 Voest Alpine Ind Anlagen Förderanlage, anlagenverbund und verfahren zur kopplung von metallurgischen verfahren
DE102007058448A1 (de) * 2007-12-05 2009-07-02 Siemens Ag Vorrichtung zur Beschickung eines Ofens
CN102556596A (zh) * 2010-12-27 2012-07-11 贵阳铝镁设计研究院有限公司 一种糊料保温带式输送机
DE202011051470U1 (de) * 2011-09-28 2011-11-04 Aumund Fördererbau Gmbh Förderanlage mit Abdichtung gegen die Umgebungsatmosphäre
EP3401628B1 (de) 2017-05-12 2022-07-13 Primetals Technologies Austria GmbH Fördern eines förderguts
CN108482945B (zh) * 2018-03-21 2019-12-24 中交机电工程局有限公司 下层带料的带式输送机
US10934099B2 (en) * 2018-05-02 2021-03-02 Caromation, Inc. Electric pallet conveyor
RU2688103C1 (ru) * 2018-12-14 2019-05-17 Общество с ограниченной ответственностью "Элкат" (ООО "Элкат") Способ получения непрерывнолитой медной заготовки для электротехнических целей и технологический комплекс для его осуществления
EP3766809A1 (de) * 2019-07-15 2021-01-20 Primetals Technologies Austria GmbH Fördern eines förderguts
CN112110137B (zh) * 2020-09-21 2024-12-27 青岛达能环保设备股份有限公司 气流床式钢渣冷却输送机
WO2025172805A1 (en) * 2024-02-14 2025-08-21 Magaldi Power S.P.A. Sealed transport system for high temperature bulk material

Family Cites Families (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR670910A (fr) 1928-03-22 1929-12-06 Electrodes De La Savoie Soc D Dispositif de chargement de fours métallurgiques
US2894831A (en) 1956-11-28 1959-07-14 Old Bruce Scott Process of fluidized bed reduction of iron ore followed by electric furnace melting
FR1481142A (fr) 1966-04-01 1967-05-19 Siderurgie Fse Inst Rech Procédé de fusion de produits métalliques
US3728431A (en) * 1970-03-28 1973-04-17 Bayer Ag Production of titanyl sulfate solutions
DE2517180C3 (de) * 1975-04-18 1979-04-19 Fa. Hermann C. Starck Berlin, 1000 Berlin Verfahren zur kontinuierlichen Herstellung von feinem hochkapazitiven Erdsäuremetallpulver für Elektrolytkondensatoren
DE2556714A1 (de) 1975-12-17 1977-06-30 Egon Evertz Elektroofen und chargierverfahren
JPS52145318A (en) * 1976-05-31 1977-12-03 Babcock Hitachi Kk Reduced gas heating apparatus
JPS52145319A (en) * 1976-05-31 1977-12-03 Sumitomo Heavy Ind Ltd Hot charging of reduced iron from reducing furnace to melting refining furnace
JPS6044594B2 (ja) 1977-04-27 1985-10-04 石川島播磨重工業株式会社 高温粉粒体の搬送装置
US4248839A (en) * 1979-07-30 1981-02-03 Nl Industries, Inc. Chlorination of impure magnesium chloride melt
US4517448A (en) * 1981-03-23 1985-05-14 Radiant Technology Corporation Infrared furnace with atmosphere control capability
GB2115011B (en) 1982-02-17 1985-12-04 British Steel Corp Improvements in or relating to a process for melting and/or refining steel
NZ212446A (en) 1982-06-02 1986-10-08 New Zealand Steel Ltd Method and apparatus for producing liquid iron from highly reduced sponge iron
DE3326505C2 (de) 1983-07-21 1986-06-19 Mannesmann AG, 4000 Düsseldorf Beschickungsvorrichtung für metallurgische Öfen
US4514218A (en) 1984-06-06 1985-04-30 Daidotokushuko Kabushikikaisha Reduced iron melting method using electric arc furnace
SE452990B (sv) 1985-06-28 1988-01-04 Asea Ab Sett for framstellning av stal i en ljusbagsugn forsedd med elektrod med genomgaende kanal
CN1019784B (zh) * 1987-12-23 1992-12-30 福勒公司 热细料输送装置
DE3806861C1 (en) * 1988-03-03 1989-06-15 Man Gutehoffnungshuette Gmbh, 4200 Oberhausen, De Transport installation for hot iron sponge
DE3933894A1 (de) * 1989-02-06 1991-04-18 Kloeckner Stahl Gmbh Schwenk-hub-vorrichtung fuer abdeckhauben
US5445363A (en) * 1990-01-09 1995-08-29 Hylsa S.A. De C.V. Apparatus for the pneumatic transport of large iron-bearing particles
US5296015A (en) * 1990-01-09 1994-03-22 Hylsa S.A. De C.V. Method for the pneumatic transport of large iron-bearing particles
US5218617A (en) 1990-06-01 1993-06-08 Hylsa S.A. De C.V. Apparatus for feeding iron-bearing materials to metallurgical furnaces
AT401527B (de) 1991-12-20 1996-09-25 Voest Alpine Ind Anlagen Verfahren zum einschmelzen von schrott, sowie vorrichtung zur durchführung dieses verfahrens
WO1994009332A1 (en) * 1992-10-16 1994-04-28 Nippon Steel Corporation Scrap conveyor
JP3145834B2 (ja) * 1993-03-08 2001-03-12 株式会社神戸製鋼所 還元鉄ブリケットの製造方法
AT400245B (de) 1993-12-10 1995-11-27 Voest Alpine Ind Anlagen Verfahren und anlage zum herstellen einer eisenschmelze
AT400247B (de) 1994-01-14 1995-11-27 Voest Alpine Ind Anlagen Verfahren zum herstellen von eisenschmelzen
AT402938B (de) * 1994-06-23 1997-09-25 Voest Alpine Ind Anlagen Verfahren und anlage zur direktreduktion von verfahren und anlage zur direktreduktion von eisenoxidhältigem material eisenoxidhältigem material
JPH08285473A (ja) * 1995-04-07 1996-11-01 Inax Corp 陶磁器用焼成炉
JP3329333B2 (ja) 1995-07-21 2002-09-30 ソニー株式会社 映像信号再生方法及び装置
DE19608531C2 (de) 1996-02-09 1998-02-26 Eisenbau Essen Gmbh Verfahren zur Behandlung von Stahl, insbesondere zum Raffinieren von Stahl zum Zuge der Stahlerzeugung
TW368521B (en) 1996-11-20 1999-09-01 Sumitomo Metal Ind Manufacturing method and apparatus for deoxidized iron
US5946339A (en) 1997-07-22 1999-08-31 Itz A Gaz, Inc. Steelmaking process using direct reduction iron
US6383251B1 (en) * 1997-08-22 2002-05-07 William Lyon Sherwood Direct iron and steelmaking
DE19744151C5 (de) 1997-10-07 2004-08-26 Outokumpu Oyj Verfahren zum Schmelzen von feinkörnigem, direkt reduziertem Eisen in einem Elektrolichtbogenofen
JP3022448B2 (ja) * 1997-11-04 2000-03-21 川崎重工業株式会社 密閉系用粉粒体供給装置
JP3235825B2 (ja) * 1997-12-08 2001-12-04 川崎重工業株式会社 密閉系用粉粒体供給装置
US6214986B1 (en) * 1998-10-07 2001-04-10 Isis Pharmaceuticals, Inc. Antisense modulation of bcl-x expression
US6200363B1 (en) * 1998-10-09 2001-03-13 Midrex International B.V. Rotterdam Zurich Branch Direct reduced iron hot/cold discharge system
JP3506617B2 (ja) * 1998-11-05 2004-03-15 株式会社タクマ 熱分解残渣の排出方法及びその装置
IT1302812B1 (it) * 1998-12-11 2000-09-29 Danieli & C Ohg Sp Forno per la riduzione diretta di ossidi di ferro
AT407752B (de) 1999-04-22 2001-06-25 Voest Alpine Ind Anlagen Verfahren und einrichtung zum einschmelzen von metallhältigem material
RU2219244C2 (ru) * 1999-08-20 2003-12-20 Мидрекс Интернэшнл Б.В. Роттердам, Цюрих Бранч Система для разгрузки железа, полученного методом прямого восстановления
TW477817B (en) * 1999-09-06 2002-03-01 Nippon Kokan Kk Metal smelting method and apparatus therefor
UA70348C2 (uk) * 1999-11-04 2004-10-15 Пхохан Айрон Енд Стіл Ко., Лтд. Відновний реактор з псевдозрідженим шаром і спосіб стабілізації псевдозрідженого шару у такому реакторі
US6648942B2 (en) * 2001-01-26 2003-11-18 Midrex International B.V. Rotterdam, Zurich Branch Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus
JP2003027149A (ja) * 2001-07-10 2003-01-29 Kobe Steel Ltd 還元鉄ブリケットの製造方法
EP1295822A1 (de) * 2001-09-21 2003-03-26 BMH Claudius Peters GmbH Pneumatische Fördervorrichtung und -verfahren
JP4492149B2 (ja) * 2004-02-19 2010-06-30 三菱化学株式会社 バケットコンベアシステム
JP4388450B2 (ja) 2004-10-08 2009-12-24 新日本製鐵株式会社 還元鉄装入装置
ITMI20050732A1 (it) 2005-04-22 2006-10-23 Danieli Off Mecc Dispositivo di convogliamento di materiale
AT502904B1 (de) 2005-12-07 2008-02-15 Voest Alpine Ind Anlagen Förderanlage, anlagenverbund und verfahren zur kopplung von metallurgischen verfahren

Also Published As

Publication number Publication date
MY153274A (en) 2015-01-29
TW200728171A (en) 2007-08-01
TWI394840B (zh) 2013-05-01
EP1957679A2 (de) 2008-08-20
CN101336302A (zh) 2008-12-31
RU2424324C2 (ru) 2011-07-20
BRPI0619571A2 (pt) 2011-10-04
ZA200805048B (en) 2009-10-28
US8202474B2 (en) 2012-06-19
AT502904B1 (de) 2008-02-15
US7858021B2 (en) 2010-12-28
US20110101577A1 (en) 2011-05-05
AT502904A1 (de) 2007-06-15
CA2632075A1 (en) 2007-06-14
EG26374A (en) 2013-09-09
EP1957679B1 (de) 2019-01-02
BR122013031567B1 (pt) 2016-09-27
JP2009518254A (ja) 2009-05-07
AU2006322336B2 (en) 2010-10-28
WO2007065582A2 (de) 2007-06-14
WO2007065582A3 (de) 2007-08-02
CA2632075C (en) 2014-08-26
KR101430566B1 (ko) 2014-08-18
UA92769C2 (ru) 2010-12-10
MX344301B (es) 2016-12-09
US20080289450A1 (en) 2008-11-27
KR20080082649A (ko) 2008-09-11
PL1957679T3 (pl) 2019-06-28
AU2006322336A1 (en) 2007-06-14
CN101336302B (zh) 2010-10-27
RU2008127321A (ru) 2010-01-20
BRPI0619571B1 (pt) 2016-02-10

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