EP0826130B1 - Verfahren zum einschmelzen von metallischen einsatzstoffen in einem schachtofen - Google Patents

Verfahren zum einschmelzen von metallischen einsatzstoffen in einem schachtofen Download PDF

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Publication number
EP0826130B1
EP0826130B1 EP97903198A EP97903198A EP0826130B1 EP 0826130 B1 EP0826130 B1 EP 0826130B1 EP 97903198 A EP97903198 A EP 97903198A EP 97903198 A EP97903198 A EP 97903198A EP 0826130 B1 EP0826130 B1 EP 0826130B1
Authority
EP
European Patent Office
Prior art keywords
oxygen
furnace
coke
wind
blast
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.)
Expired - Lifetime
Application number
EP97903198A
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German (de)
English (en)
French (fr)
Other versions
EP0826130A1 (de
Inventor
Josef Ramthun
Albert Koperek
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
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Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0826130A1 publication Critical patent/EP0826130A1/de
Application granted granted Critical
Publication of EP0826130B1 publication Critical patent/EP0826130B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/28—Arrangements of monitoring devices, of indicators, of alarm devices

Definitions

  • the invention is defined in claim 1 and relates to a method for melting metallic feedstocks in a shaft furnace where coke Metallic and non-metallic materials, such as iron and non-ferrous metals, Basalt and diabase, despite the development of electrical and flame-heated melting processes as before melted in coke-heated shaft ovens. So are still today approx. 60% of all iron materials are produced in cupola furnaces.
  • oxygen either by enriching the Cupola furnace wind up to max. 25% or by direct injection with Subsonic speed is blown into the cupola furnace. Due to the high operating costs, however, oxygen is used only used discontinuously, e.g. for a quick start the cold oven or for a temporary increase in the Iron temperature. The possibility of increasing performance, i.e. Continuous use of oxygen is only used in exceptional cases used.
  • melting performance diagram Fig. 1 By linking the influencing factors, wind volume, coke rate and Combustion ratio with the target sizes, melting performance diagram Fig. 1 with curves of the same coke set and the same Wind amount.
  • This melt flow diagram known as the Jungbluth diagram must be determined empirically for each cupola. A Transfer to other cupola furnaces is not possible because of the operating behavior with changed boundary conditions, such as coke lumps, Coke reactivity, compound composition, wind speed, Oven pressure, temperature, etc. change immediately.
  • the heat losses are lowest at the maximum temperature. If the amount of wind is too high, ie the flow rate is high, the furnace is blown over. If the air volume is too small, ie the flow rate is too low, the furnace is blown out. In both cases, the combustion temperature is reduced because, on the one hand, the additional N 2 ballast has to be heated and, on the other hand, heat is extracted through the additional CO formation. In addition, the iron accompanying elements are more strongly oxidized when overblown.
  • the coke present in the middle of the furnace does not contribute to the reaction because the combustion air due to the low momentum cannot penetrate the bed in front of it.
  • the reaction zone is in the immediate vicinity of the wind nozzle (Fig. 2a).
  • the depth of penetration is not essential enlarge. Due to the higher oxygen supply, the reaction zone expanded upwards due to the pressure conditions (Fig. 2b).
  • the even combustion over the furnace cross section i.e. the even distribution of the oxygen supply desirable.
  • the impulse i.e. the The speed of the air or oxygen has been radiating up to now Targeted values to be designated as state of the art increased become.
  • Patent application GB 2 018 295 describes a system with which the oxygen is built into the center of the wind vents Laval nozzles, i.e. blown in at supersonic speed to the wear of the refractory lining minimize.
  • the Kökssatz could not be reduced.
  • EP-A-0 554 022 discloses a method for melting metallic Feedstocks in a shaft furnace in which coke with preheated air and largely pure oxygen is burned and the flue gases in countercurrent heat the metal insert and the melt in the coke bed overheats and is carburized.
  • a fixed subset of the Oxygen injected into the coke bed at supersonic speed is used.
  • the remaining amount of oxygen is added to the wind in the wind ring in a controlled manner (Fig. 4).
  • the oxygen enrichment in the wind is controlled and regulated by the components CO, CO 2 , O 2 , in the blast furnace gas.
  • the reaction zone which has penetrated into the tongue in the middle of the cupola furnace as a result of the supersonic injection (FIG. 2 c), is expanded and evened out, since, due to the suction capacity of the supersonic jet, combustion air enriched with O 2 is also transported to the center of the furnace. (Fig. 2d)
  • the furnace pressure is reduced and reduced the amount of blast furnace gas by 20%. Due to the The smaller the flow rate in the furnace, the amount of dust additionally reduced in proportion to the amount of blast furnace gas.
  • the hot wind temperature increases by up to 30 ° C because the recuperator passes through the reduced amount of wind has to do less.
  • the basic quantities can be selected from the diagram according to FIG. 3.
  • the absolute amount of oxygen addition is determined by the desired Iron temperature determined. The iron temperature rises when the temperature in the coke bed rises. The temperature in the coke bed increases when the cooling effect of the accompanying oxygen Nitrogen is missing.
  • the optimal ratio of the volume shares of CO to CO2 in the Top gas is the sum of the resulting operating costs determined. A more reducing atmosphere with higher ones Proportions of CO result in savings in silicon and higher Coke expenses. The optimal setting therefore depends also depending on the respective market prices of the raw materials. There are Times and countries where a more oxidizing mode of operation is economical. The cheapest ratio of CO to CO2 must therefore be checked from time to time and the appropriate one Amount of oxygen can be adjusted.
  • the intended optimal attitude of CO to CO2 fluctuates, because by scattering the batches of Carbon to iron is produced. This short term Fluctuations can be caused by adjusting the addition of Oxygen can be balanced.
  • the Boudouard reaction is prompt, because the temperature of the coke bed when adding Oxygen rises very quickly.
  • the supply of the total amount of Oxygen to O1 and 02 is therefore controlled so that the Ratio of CO to CO2 at the most economical value is held. With this driving style, the least spread of analysis achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Heat Treatment Of Articles (AREA)
  • Die Bonding (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP97903198A 1996-03-04 1997-03-03 Verfahren zum einschmelzen von metallischen einsatzstoffen in einem schachtofen Expired - Lifetime EP0826130B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH556/96 1996-03-04
CH00556/96A CH690378A5 (de) 1996-03-04 1996-03-04 Verfahren zum Einschmelzen von metallischen Einsatzstoffen in einem Schachtofen.
CH55696 1996-03-04
PCT/CH1997/000080 WO1997033134A1 (de) 1996-03-04 1997-03-03 Verfahren zum einschmelzen von metallischen einsatzstoffen in einem schachtofen

Publications (2)

Publication Number Publication Date
EP0826130A1 EP0826130A1 (de) 1998-03-04
EP0826130B1 true EP0826130B1 (de) 2003-07-23

Family

ID=4189741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97903198A Expired - Lifetime EP0826130B1 (de) 1996-03-04 1997-03-03 Verfahren zum einschmelzen von metallischen einsatzstoffen in einem schachtofen

Country Status (18)

Country Link
US (1) US5946340A (cs)
EP (1) EP0826130B1 (cs)
JP (1) JPH11504707A (cs)
KR (1) KR19990008225A (cs)
AT (1) ATE245791T1 (cs)
AU (1) AU1763997A (cs)
BR (1) BR9702109A (cs)
CA (1) CA2217995A1 (cs)
CH (1) CH690378A5 (cs)
CZ (1) CZ342097A3 (cs)
DE (1) DE59710457D1 (cs)
ES (1) ES2205170T3 (cs)
PL (1) PL323343A1 (cs)
PT (1) PT826130E (cs)
RU (1) RU2137068C1 (cs)
SK (1) SK147397A3 (cs)
TR (1) TR199701297T1 (cs)
WO (1) WO1997033134A1 (cs)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954556A1 (de) * 1999-11-12 2001-05-23 Messer Griesheim Gmbh Verfahren zum Betreiben eines Schmelzofens
FR2893122B1 (fr) * 2005-11-10 2014-01-31 Air Liquide Procede d'injection supersonique d'oxygene dans un four
EP1939305A1 (en) * 2006-12-29 2008-07-02 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process for making pig iron in a blast furnace
JP5262354B2 (ja) * 2008-06-30 2013-08-14 Ｊｆｅスチール株式会社 竪型溶解炉を用いた溶銑製造方法
JP5515242B2 (ja) * 2008-06-30 2014-06-11 Ｊｆｅスチール株式会社 竪型溶解炉を用いた溶銑製造方法
JP5181875B2 (ja) * 2008-06-30 2013-04-10 Ｊｆｅスチール株式会社 竪型溶解炉を用いた溶銑製造方法
US8323558B2 (en) * 2009-11-30 2012-12-04 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic control of lance utilizing counterflow fluidic techniques
US20110127701A1 (en) * 2009-11-30 2011-06-02 Grant Michael G K Dynamic control of lance utilizing co-flow fluidic techniques
US8377372B2 (en) * 2009-11-30 2013-02-19 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic lances utilizing fluidic techniques
US9797023B2 (en) 2013-12-20 2017-10-24 Grede Llc Shaft furnace and method of operating same
KR200480927Y1 (ko) 2014-07-10 2016-07-25 임홍섭 조립식 선반
RU2709318C1 (ru) * 2019-04-24 2019-12-17 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Способ ведения доменной плавки

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR890211A (fr) * 1941-10-25 1944-02-02 Eisenwerke A G Deutsche Procédé de production de la fonte au haut-fourneau en présence d'oxygène
GB914904A (en) * 1959-10-28 1963-01-09 British Oxygen Co Ltd Melting of ferrous metal
US3964897A (en) * 1973-03-02 1976-06-22 Klockner-Werke Ag Method and arrangement for melting charges, particularly for use in the production of steel
GB1571484A (en) * 1975-12-05 1980-07-16 Boc Ltd Process for melting metal in a vertical shaft furnace
US4324583A (en) * 1981-01-21 1982-04-13 Union Carbide Corporation Supersonic injection of oxygen in cupolas
US4547150A (en) * 1984-05-10 1985-10-15 Midland-Ross Corporation Control system for oxygen enriched air burner
ZA85287B (en) * 1985-01-21 1986-09-24 Korf Engineering Gmbh Process for the production of pig iron
US5060913A (en) * 1989-08-30 1991-10-29 Regents Of The University Of Minnesota Integrated metallurgical reactor
GB9202073D0 (en) * 1992-01-31 1992-03-18 Boc Group Plc Operation of vertical shaft furnaces
JPH07190629A (ja) * 1993-04-15 1995-07-28 Ishikawajima Harima Heavy Ind Co Ltd スクラップ原料予熱装入装置
JPH07332860A (ja) * 1994-06-10 1995-12-22 Taiyo Chuki Co Ltd 竪型迅速溶解炉

Also Published As

Publication number Publication date
CZ342097A3 (cs) 1998-03-18
BR9702109A (pt) 2001-11-27
PT826130E (pt) 2003-12-31
US5946340A (en) 1999-08-31
SK147397A3 (en) 1998-06-03
WO1997033134A1 (de) 1997-09-12
CA2217995A1 (en) 1997-09-12
MX9708409A (es) 1998-08-30
ATE245791T1 (de) 2003-08-15
CH690378A5 (de) 2000-08-15
AU1763997A (en) 1997-09-22
KR19990008225A (ko) 1999-01-25
RU2137068C1 (ru) 1999-09-10
DE59710457D1 (de) 2003-08-28
ES2205170T3 (es) 2004-05-01
JPH11504707A (ja) 1999-04-27
EP0826130A1 (de) 1998-03-04
PL323343A1 (en) 1998-03-30
TR199701297T1 (xx) 1998-06-22

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