EP1431403A1 - Dispositif et procédé de fusion directe - Google Patents

Dispositif et procédé de fusion directe Download PDF

Info

Publication number
EP1431403A1
EP1431403A1 EP02077781A EP02077781A EP1431403A1 EP 1431403 A1 EP1431403 A1 EP 1431403A1 EP 02077781 A EP02077781 A EP 02077781A EP 02077781 A EP02077781 A EP 02077781A EP 1431403 A1 EP1431403 A1 EP 1431403A1
Authority
EP
European Patent Office
Prior art keywords
vessel
slag layer
metallurgical vessel
iron
supplying
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Withdrawn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
EP02077781A
Other languages
German (de)
English (en)
Inventor
Mark Bernard Denys
Hendrikus Koenraad Albertus Meijer
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.)
Corus Technology BV
Original Assignee
Corus Technology BV
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 Corus Technology BV filed Critical Corus Technology BV
Priority to EP02077781A priority Critical patent/EP1431403A1/fr
Priority to BRPI0312653-6B1A priority patent/BR0312653B1/pt
Priority to KR1020057000472A priority patent/KR101000142B1/ko
Priority to AU2003281064A priority patent/AU2003281064B2/en
Priority to JP2004520595A priority patent/JP2005537388A/ja
Priority to RU2005103401/02A priority patent/RU2325445C2/ru
Priority to MXPA05000456A priority patent/MXPA05000456A/es
Priority to CN038199130A priority patent/CN1688721B/zh
Priority to CA2492243A priority patent/CA2492243C/fr
Priority to PCT/EP2003/007527 priority patent/WO2004007777A2/fr
Priority to US10/520,480 priority patent/US7550108B2/en
Priority to EP03740456.3A priority patent/EP1521853B1/fr
Publication of EP1431403A1 publication Critical patent/EP1431403A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • C21B13/10—Making spongy iron or liquid steel, by direct processes in 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
    • C21B13/14—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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/305—Afterburning

Definitions

  • the invention relates to a metallurgical vessel comprising a lower portion for accommodating a molten metal bath and part of a slag layer in use, an upper portion for accommodating the remainder of the slag layer in use and a plurality of lances which project into the upper portion of the vessel and supply oxygen containing gas to the upper portion of the vessel.
  • the present invention also relates to a method of iron making.
  • metallurgical vessel refers to a vessel suitable for treating metal or metal oxide, metal smelting, refining or reducing.
  • EP 0 735 146 describes a metallurgical vessel of the converter type, in which pre-reduced iron compounds are further reduced.
  • Oxygen is supplied by means of a plurality of lances that project through the wall of the vessel and extend to above the slag layer. It is known from this document to introduce a gas through the bottom of the vessel into the molten metal in order to rinse the iron melt. This procedure is also known as bottom stirring or bottom bubbling in the art and is performed to agitate the molten metal in the lower portion of the vessel.
  • Bottom stirring ensures sufficient heat transfer to the molten metal bath beneath the slag layer and sufficient stirring of the lower slag layer itself so that it does not become quiescent and so that heat generated in the upper slag layer is also transferred to the lower slag layer.
  • Bottom stirring has considerable drawbacks such as, for example, increasing refractory erosion along the walls of the vessel in the area of the hot metal as well as requiring injection points beneath the tap level of the vessel that have a relatively short lifetime and are difficult to maintain.
  • the object of the present invention is to provide a metallurgical vessel having reduced refractory erosion and greater ease of maintenance without a reduction in production efficiency.
  • the present invention overcomes the problems of the prior art as the metallurgical vessel comprises a plurality of tuyeres arranged around the circumference of the lower portion of the vessel suitable for supplying gas and/or liquid and/or solids and/or plasma into the slag layer in the lower portion of the vessel.
  • the plurality of lances supply oxygen containing gas, and thereby heat, to the slag in the upper portion of the vessel whilst the gas and/or liquid and/or solids and/or plasma supplied by the tuyeres ensure that the lower slag layer does not become quiescent. Quiescence results in a cooling of the lower slag layer and a loss of productivity.
  • the tuyeres supply gas and/or liquid and/or solids and/or plasma directly to the lower slag layer whereas gas is injected through the bottom of the vessel into the molten metal in bottom stirring.
  • the present invention thus does not generate high flow velocities in the molten metal thereby avoiding one of the major drawbacks of bottom stirring namely the fast erosion of the vessel wall in the part of the vessel containing the molten metal.
  • the supply of gas and/or liquid and/or solids and/or plasma to the slag layer in the lower portion of the vessel by the tuyeres thus does not cause erosion of the refractory lining in the hot metal zone but it does maintain productivity by stirring the lower slag layer. Stirring the lower slag layer maximises reactions within the lower slag layer and ensures it does not become quiescent.
  • the supply of combustible gas and/or liquid and/or solids by the tuyeres also increases heat transfer from the slag layer to the molten metal in the lower portion of the vessel.
  • the tuyeres are also easier to maintain as they are positioned above the tap level of the vessel.
  • the diameter of the lower portion of the vessel may preferably be smaller than the diameter of the upper portion of the vessel.
  • the tuyeres are arranged around the circumference of the lower part of the vessel and therefore the jets emitted by the tuyeres will penetrate into the slag layer in the lower portion of the vessel before rising through the slag into the upper portion of the vessel. Any "hot spots" i.e. areas of higher temperature, created by the gas and/or liquid and/or solids and/or plasma supplied by the tuyeres, in the slag layer in the upper portion of the vessel will therefore be sufficiently distant from the wall of the vessel to ensure that no increase in corrosion and/or erosion of the wall occurs.
  • the tuyeres may preferably comprise oxy-fuel burners to act as a direct heat source in the slag layer in the lower portion of the vessel.
  • the oxy-fuel burners will increase the productivity of the reactor by increasing the occurrence of the endothermic reduction reactions and thereby increasing the reduction capacity of the slag layer.
  • the tuyeres preferably supply oxygen containing gas to the slag layer in the lower portion of the vessel.
  • the oxygen contained in the gas will combust char into carbon monoxide thereby providing an additional source of heat in the slag layer and increasing the productivity of the reactor as explained for oxy-fuel burners.
  • At least ten tuyeres may be positioned around the lower portion of the vessel to ensure optimum distribution of the gas and/or liquid and/or solids and/or plasma, supplied by the tuyeres, into the slag layer.
  • the metallurgical vessel of the present invention preferably comprises a melting cyclone positioned above, and in open communication with, the vessel.
  • a melting cyclone is described in Dutch patent NL C 257692 and EP 0690136.
  • the metallurgical vessel of the present invention may be used for iron making and steel making.
  • the present invention also relates to a method of reducing iron oxide to iron using a metallurgical vessel in accordance with the invention, comprising the steps of supplying iron oxide to the vessel, supplying oxygen containing gas to the interior of the metallurgical vessel, supplying carbonaceous material to the iron oxide and supplying gas and/or liquid and/or solids and/or plasma into the slag layer in the lower portion of the vessel via the plurality of tuyeres.
  • the present invention also relates to a method of iron making comprising the steps of:
  • FIG. 1 shows an apparatus in accordance with the invention.
  • the apparatus in figure 1 comprises a metallurgical vessel 1 and a melting cyclone 8. Details of the melting cyclone are not shown.
  • the metallurgical vessel itself comprises a lower portion 2 which accommodates the iron bath 9 and part of the slag layer 6 and comprises at least one tap hole 11 for tapping off molten iron and slag.
  • the vessel also comprises an upper portion 3, which accommodates the remainder of the slag layer 6, and a roof portion 4.
  • the slag layer 6 thus rests on top of the iron bath 9 and extends from the lower portion of the vessel 2 into the upper portion 3.
  • Pre-reduced iron oxide 10 falls or flows from the melting cyclone into the metallurgical vessel and is finally reduced in the slag layer.
  • a plurality of lances 5 supply oxygen containing gas to the slag layer 6 in the upper portion 3 of the vessel. Two lances are shown in the figure but more may be present depending on, for example, the size of the vessel and the performance parameters of the lances.
  • a plurality of tuyeres 7 are arranged around the circumference of the lower portion of the vessel. The tuyeres are suitable for supplying gas and/or liquid and/or solids (such as recycled dust) and/or plasma to the slag layer in the lower portion 2 of the vessel. The number of tuyeres arranged around the circumference of the lower part of the vessel can be varied depending on the size of the vessel and the performance parameters of the tuyeres.
  • the tuyeres may comprise oxy-fuel burners.
  • a process gas comprising reducing CO is produced that is partially post-combusted above the slag layer 6 in the vessel 1, whereby heat needed for the final reduction is released.
  • the reducing process gas rises and is further post-combusted in the melting cyclone 8 with oxygen containing gas supplied to the melting cyclone.
  • Iron oxide supplied to the melting cyclone is pre-reduced approximately to FeO and at least partly melted in the melting cyclone.
  • the pre-reduced iron oxide 10 then falls or flows down into the metallurgical vessel 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
EP02077781A 2002-07-10 2002-07-10 Dispositif et procédé de fusion directe Withdrawn EP1431403A1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP02077781A EP1431403A1 (fr) 2002-07-10 2002-07-10 Dispositif et procédé de fusion directe
BRPI0312653-6B1A BR0312653B1 (pt) 2002-07-10 2003-07-10 recipiente metalérgico para produzir ferro
KR1020057000472A KR101000142B1 (ko) 2002-07-10 2003-07-10 금속용기
AU2003281064A AU2003281064B2 (en) 2002-07-10 2003-07-10 Metallurgical vessel and method of iron making by means of direct reduction
JP2004520595A JP2005537388A (ja) 2002-07-10 2003-07-10 冶金容器
RU2005103401/02A RU2325445C2 (ru) 2002-07-10 2003-07-10 Металлургический сосуд и способ прямого восстановления железа
MXPA05000456A MXPA05000456A (es) 2002-07-10 2003-07-10 Contenedor metalurgico y metodo para fabricar hierro por medio de reduccion directa.
CN038199130A CN1688721B (zh) 2002-07-10 2003-07-10 冶金容器
CA2492243A CA2492243C (fr) 2002-07-10 2003-07-10 Cuve metallurgique et procede de fabrication de fer par reduction directe
PCT/EP2003/007527 WO2004007777A2 (fr) 2002-07-10 2003-07-10 Cuve de métallurgie
US10/520,480 US7550108B2 (en) 2002-07-10 2003-07-10 Metallurgical vessel
EP03740456.3A EP1521853B1 (fr) 2002-07-10 2003-07-10 Cuve de m tallurgie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02077781A EP1431403A1 (fr) 2002-07-10 2002-07-10 Dispositif et procédé de fusion directe

Publications (1)

Publication Number Publication Date
EP1431403A1 true EP1431403A1 (fr) 2004-06-23

Family

ID=32338096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02077781A Withdrawn EP1431403A1 (fr) 2002-07-10 2002-07-10 Dispositif et procédé de fusion directe

Country Status (1)

Country Link
EP (1) EP1431403A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022106592A1 (fr) * 2020-11-19 2022-05-27 Rockwool International A/S Procédé de préparation d'une masse fondue pour la production de fibres minérales artificielles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203170A (en) * 1987-02-27 1988-10-12 Howden James & Co Ltd Producing steel
US4852858A (en) * 1987-04-21 1989-08-01 Kortec Ag Charging material preheater for preheating charging material for a metallurgical smelting unit
EP0726326A2 (fr) * 1995-02-13 1996-08-14 Hoogovens Staal B.V. Procédé pour produire de la fonte liquide
WO1997020954A1 (fr) * 1995-12-06 1997-06-12 Wmc Resources Ltd. Procede duplex simplifie de traitement de minerais et/ou concentres de nickel en vue de la production de ferronickels, de fers au nickel et d'aciers inoxydables
US6322745B1 (en) * 1998-07-01 2001-11-27 Technological Resources Pty. Ltd. Direct smelting vessel and direct smelting process
US6352574B1 (en) * 1997-03-25 2002-03-05 Centro Sviluppo Materiali S.P.A. Process for direct production of cast iron from fine iron ore and fine coal
US6368548B1 (en) * 1999-06-04 2002-04-09 Technological Resources Pty. Ltd. Direct smelting process and apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203170A (en) * 1987-02-27 1988-10-12 Howden James & Co Ltd Producing steel
US4852858A (en) * 1987-04-21 1989-08-01 Kortec Ag Charging material preheater for preheating charging material for a metallurgical smelting unit
EP0726326A2 (fr) * 1995-02-13 1996-08-14 Hoogovens Staal B.V. Procédé pour produire de la fonte liquide
WO1997020954A1 (fr) * 1995-12-06 1997-06-12 Wmc Resources Ltd. Procede duplex simplifie de traitement de minerais et/ou concentres de nickel en vue de la production de ferronickels, de fers au nickel et d'aciers inoxydables
US6352574B1 (en) * 1997-03-25 2002-03-05 Centro Sviluppo Materiali S.P.A. Process for direct production of cast iron from fine iron ore and fine coal
US6322745B1 (en) * 1998-07-01 2001-11-27 Technological Resources Pty. Ltd. Direct smelting vessel and direct smelting process
US6368548B1 (en) * 1999-06-04 2002-04-09 Technological Resources Pty. Ltd. Direct smelting process and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"ROMELT OFFERS FLEXIBLE SINGLE STEP HOT METAL WITHOUT COKE", STEEL TIMES INTERNATIONAL.(INC. STEEL TIMES), DMG WORLD MEDIA, REDHILL, SURREY, GB, vol. 20, no. 1, 1996, pages 40 - 41, XP000547906, ISSN: 0143-7798 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022106592A1 (fr) * 2020-11-19 2022-05-27 Rockwool International A/S Procédé de préparation d'une masse fondue pour la production de fibres minérales artificielles

Similar Documents

Publication Publication Date Title
EP1067201B1 (fr) Procédure de démarrage pour un procédé de fusion directe
US7914601B2 (en) Cold start-up method for a direct smelting process
US4089677A (en) Metal refining method and apparatus
RU2090622C1 (ru) Способ получения железа из железосодержащих сырьевых материалов в конвертере
KR100727729B1 (ko) 직접 제련 공정 방법
EP0735146B1 (fr) Dispositif pour la fabrication de fonte par réduction directe
US6478848B1 (en) Direct smelting process
KR100611692B1 (ko) 직접 제련 방법 및 장치
EP1114192B1 (fr) Procede et appareil de production de metaux et d'alliages metalliques
CA1336542C (fr) Methode de fusion et de reduction de minerais de fer, et appareillage utilise
KR20010030513A (ko) 직접 제련 방법
KR20010074750A (ko) 직접 용융 공정
US5454852A (en) Converter for the production of steel
KR100792988B1 (ko) 직접제련 방법 및 장치
JP4715384B2 (ja) 溶銑の脱燐処理方法及び脱燐処理用上吹きランス
EP1521853B1 (fr) Cuve de m tallurgie
US4302244A (en) Steel conversion method
EP1431403A1 (fr) Dispositif et procédé de fusion directe
JPH01127613A (ja) 溶融金属の精錬方法及びその装置
EP0950117B1 (fr) Procede de fabrication de metaux et d'alliages metalliques
CN111801431A (zh) 用于钢铁生产的熔炼装置
WO2009087183A1 (fr) Refroidissement d'un récipient de réduction par fusion métallurgique
JPH09165613A (ja) スクラップの溶解方法
JPS631367B2 (fr)
JP2022117935A (ja) 溶鉄の精錬方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050201