EP0826130A1 - Process for melting of metal materials in a shaft furnace - Google Patents
Process for melting of metal materials in a shaft furnaceInfo
- Publication number
- EP0826130A1 EP0826130A1 EP97903198A EP97903198A EP0826130A1 EP 0826130 A1 EP0826130 A1 EP 0826130A1 EP 97903198 A EP97903198 A EP 97903198A EP 97903198 A EP97903198 A EP 97903198A EP 0826130 A1 EP0826130 A1 EP 0826130A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxygen
- furnace
- coke
- wind
- shaft furnace
- 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.)
- Granted
Links
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 relates to a process for melting metallic feedstocks in a shaft furnace, in which coke Metallic and non-metallic materials, such as iron and non-ferrous metals, basalt and diabase, are still melted in coke-heated shaft furnaces despite the development of electrical and flame-heated melting processes. About 60% of all iron materials are still produced in cupola furnaces today.
- oxygen either by enriching the cupola furnace wind up to max. 25% or is injected into the cupola furnace by direct injection at subsonic speed. Due to the high operating costs, oxygen is only used intermittently, e.g. for quick start-up of the cold furnace 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.
- REPLACEMENT LEAF By linking the influencing variables, wind quantity, coke rate and combustion ratio with the target variables, melting capacity diagram Fig. 1 with curves of the same coke rate and the same wind quantity.
- This melting performance diagram known as the Jungbluth diagram, must be determined empirically for each cupola furnace. A transfer to other cupola furnaces is not possible, since the operating behavior changes immediately under changed boundary conditions, such as coke lumpiness, coke reactivity, batch composition, wind speed, furnace pressure, temperature, etc.
- the heat losses are lowest at the maximum temperature. If there is too much wind, ie high flow speed, the furnace will be overblown. If the air volume is too small, ie the flow speed 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 removed by the additional CO formation. In addition, the iron accompanying elements are more strongly oxidized during overblowing.
- the cupola furnace produces a non-pourable iron.
- the coke present in the middle of the furnace does not contribute to the reaction, since the combustion air cannot penetrate the bed in front of it due to the low impulse.
- the reaction zone is in the immediate vicinity of the wind nozzle (Fig. 2a). The penetration depth will not increase significantly by the known enrichment of the furnace wind with oxygen or by blowing in the oxygen at subsonic speed. Due to the higher oxygen supply, the reaction zone is expanded upwards due to the pressure conditions (FIG. 2b).
- the remaining amount of oxygen is regulated mixed with the wind in the wind ring (FIG. 4). This measure enables constant analysis.
- the oxygen enrichment in the wind is controlled and regulated via the components CO, CO2, O2, in the blast furnace gas.
- the reaction zone, which penetrated into the middle of the cupola by supersonic injection (Fig. 2c), is extended upwards
- the furnace pressure is reduced and the amount of blast furnace gas is reduced by 20%. Due to the lower flow velocity in the furnace, the amount of dust is reduced proportionally to the amount of blast furnace gas.
- the hot wind temperature rises by up to 30 ° C because the recuperator has to do less due to the reduced amount of wind.
- the base quantities can be selected from the diagram OCI1.XLS.
- the absolute amount of oxygen addition is determined by the desired iron temperature. The iron temperature rises when the temperature in the coke bed rises. The temperature in the coke bed rises when the cooling effect of the nitrogen accompanying the oxygen is absent.
- the optimal ratio of the volume shares of CO to C02 in the gout'as is determined from the sum of the resulting operating costs. A more reducing atmosphere with higher proportions of CO results in savings in silicon and higher expenses for coke. The optimal setting therefore also depends on the respective market prices of the raw materials. There are times and countries when a more oxidizing mode of operation is economical. The most favorable ratio of CO to C02 must
- REPLACEMENT LEAF therefore be checked from time to time and the appropriate amount of oxygen adjusted.
- the intended optimal setting of CO to C02 fluctuates because it is caused by the spread of the charged amounts of carbon to iron. These short-term fluctuations can be compensated for by adjusting the addition of oxygen.
- the Boudouard reaction is prompt because the temperature of the coke bed rises very quickly when oxygen is added.
- the supply of the total amount of oxygen to 01 and 02 is therefore controlled so that the ratio of CO to C02 is kept at the most economical value. With this mode of operation, the least scatter in the analysis is then 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)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH55696 | 1996-03-04 | ||
CH00556/96A CH690378A5 (en) | 1996-03-04 | 1996-03-04 | A process for melting metallic charge materials in a shaft furnace. |
CH556/96 | 1996-03-04 | ||
PCT/CH1997/000080 WO1997033134A1 (en) | 1996-03-04 | 1997-03-03 | Process for melting of metal materials in a shaft furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0826130A1 true EP0826130A1 (en) | 1998-03-04 |
EP0826130B1 EP0826130B1 (en) | 2003-07-23 |
Family
ID=4189741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97903198A Expired - Lifetime EP0826130B1 (en) | 1996-03-04 | 1997-03-03 | Process for melting of metal materials in a shaft furnace |
Country Status (18)
Country | Link |
---|---|
US (1) | US5946340A (en) |
EP (1) | EP0826130B1 (en) |
JP (1) | JPH11504707A (en) |
KR (1) | KR19990008225A (en) |
AT (1) | ATE245791T1 (en) |
AU (1) | AU1763997A (en) |
BR (1) | BR9702109A (en) |
CA (1) | CA2217995A1 (en) |
CH (1) | CH690378A5 (en) |
CZ (1) | CZ342097A3 (en) |
DE (1) | DE59710457D1 (en) |
ES (1) | ES2205170T3 (en) |
PL (1) | PL323343A1 (en) |
PT (1) | PT826130E (en) |
RU (1) | RU2137068C1 (en) |
SK (1) | SK147397A3 (en) |
TR (1) | TR199701297T1 (en) |
WO (1) | WO1997033134A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19954556A1 (en) * | 1999-11-12 | 2001-05-23 | Messer Griesheim Gmbh | Process for operating a melting furnace |
FR2893122B1 (en) * | 2005-11-10 | 2014-01-31 | Air Liquide | PROCESS FOR THE SUPERSONIC INJECTION OF OXYGEN IN AN OVEN |
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 (en) * | 2008-06-30 | 2013-08-14 | Jfeスチール株式会社 | Hot metal production method using vertical melting furnace |
JP5181875B2 (en) * | 2008-06-30 | 2013-04-10 | Jfeスチール株式会社 | Hot metal production method using vertical melting furnace |
JP5515242B2 (en) * | 2008-06-30 | 2014-06-11 | Jfeスチール株式会社 | Hot metal production method using vertical melting furnace |
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 |
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 |
US9797023B2 (en) | 2013-12-20 | 2017-10-24 | Grede Llc | Shaft furnace and method of operating same |
KR200480927Y1 (en) | 2014-07-10 | 2016-07-25 | 임홍섭 | A shelve by assemble |
RU2709318C1 (en) * | 2019-04-24 | 2019-12-17 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Blast-furnace smelting method |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR890211A (en) * | 1941-10-25 | 1944-02-02 | Eisenwerke A G Deutsche | A process for producing cast iron in a blast furnace in the presence of oxygen |
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 (en) * | 1993-04-15 | 1995-07-28 | Ishikawajima Harima Heavy Ind Co Ltd | Scrap material preheating and charging device |
JPH07332860A (en) * | 1994-06-10 | 1995-12-22 | Taiyo Chuki Co Ltd | Vertical type rapid melting furnace |
-
1996
- 1996-03-04 CH CH00556/96A patent/CH690378A5/en not_active IP Right Cessation
-
1997
- 1997-03-03 WO PCT/CH1997/000080 patent/WO1997033134A1/en active IP Right Grant
- 1997-03-03 JP JP9531292A patent/JPH11504707A/en active Pending
- 1997-03-03 BR BR9702109-1A patent/BR9702109A/en not_active Application Discontinuation
- 1997-03-03 PL PL97323343A patent/PL323343A1/en unknown
- 1997-03-03 US US08/952,316 patent/US5946340A/en not_active Expired - Fee Related
- 1997-03-03 AT AT97903198T patent/ATE245791T1/en not_active IP Right Cessation
- 1997-03-03 CA CA002217995A patent/CA2217995A1/en not_active Abandoned
- 1997-03-03 RU RU97119930A patent/RU2137068C1/en active
- 1997-03-03 PT PT97903198T patent/PT826130E/en unknown
- 1997-03-03 SK SK1473-97A patent/SK147397A3/en unknown
- 1997-03-03 TR TR97/01297T patent/TR199701297T1/en unknown
- 1997-03-03 ES ES97903198T patent/ES2205170T3/en not_active Expired - Lifetime
- 1997-03-03 EP EP97903198A patent/EP0826130B1/en not_active Expired - Lifetime
- 1997-03-03 DE DE59710457T patent/DE59710457D1/en not_active Expired - Lifetime
- 1997-03-03 KR KR1019970707751A patent/KR19990008225A/en not_active Application Discontinuation
- 1997-03-03 AU AU17639/97A patent/AU1763997A/en not_active Abandoned
- 1997-03-03 CZ CZ973420A patent/CZ342097A3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9733134A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL323343A1 (en) | 1998-03-30 |
US5946340A (en) | 1999-08-31 |
EP0826130B1 (en) | 2003-07-23 |
DE59710457D1 (en) | 2003-08-28 |
RU2137068C1 (en) | 1999-09-10 |
ES2205170T3 (en) | 2004-05-01 |
CH690378A5 (en) | 2000-08-15 |
ATE245791T1 (en) | 2003-08-15 |
MX9708409A (en) | 1998-08-30 |
PT826130E (en) | 2003-12-31 |
AU1763997A (en) | 1997-09-22 |
SK147397A3 (en) | 1998-06-03 |
CZ342097A3 (en) | 1998-03-18 |
TR199701297T1 (en) | 1998-06-22 |
WO1997033134A1 (en) | 1997-09-12 |
BR9702109A (en) | 2001-11-27 |
CA2217995A1 (en) | 1997-09-12 |
JPH11504707A (en) | 1999-04-27 |
KR19990008225A (en) | 1999-01-25 |
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