EP0263119A1 - Procede et dispositif pour la gazeification d'un bain de fusion - Google Patents

Procede et dispositif pour la gazeification d'un bain de fusion

Info

Publication number
EP0263119A1
EP0263119A1 EP87901387A EP87901387A EP0263119A1 EP 0263119 A1 EP0263119 A1 EP 0263119A1 EP 87901387 A EP87901387 A EP 87901387A EP 87901387 A EP87901387 A EP 87901387A EP 0263119 A1 EP0263119 A1 EP 0263119A1
Authority
EP
European Patent Office
Prior art keywords
iron
zone
oxygen
reduction
melting
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Withdrawn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
EP87901387A
Other languages
German (de)
English (en)
Inventor
Artur Richard Greul
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 EP0263119A1 publication Critical patent/EP0263119A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/02—Making pig-iron other than in blast furnaces in low shaft furnaces or shaft 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
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C21B5/023—Injection of the additives into the melting part
    • C21B5/026—Injection of the additives into the melting part of plastic material
    • 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
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/22—Increasing the gas reduction potential of recycled exhaust gases by reforming
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/18—Degasifying

Definitions

  • the invention relates to a process for the reduction of iron ores and for smelting iron and for the simultaneous generation of synthesis or fuel gases in downward direct current, in which pure oxygen is injected into a combustion chamber consisting of ore, additives and excess carbon-containing fuel in a combustion zone and the gases thereby generated are passed down through an underlying reduction zone, the CO 2 formed being reduced to parts by the excess carbon to CO, which in turn subjects the iron ore to an indirect reduction, in which the reduced liquid iron and the liquid slag are further reduced drip down and the specifically heavier iron from the slag floating on it before reoxidation is protected and the CO 2 formed is completely dissociated with the residual carbon in CO and finally the reaction gas formed, which mainly consists of CO and smaller amounts of H 2 , is withdrawn, while the carburized pig iron and the slag are sporadically removed.
  • the invention further relates to a melting furnace for performing this method.
  • DE-OS 33 24 064 has already described such a direct current method and an apparatus for carrying out this method.
  • This device consists of a shaft furnace which has a clear height of approximately 15 m, in which the devices for blowing in oxygen are arranged at least 3 m above the gas discharge openings. It is a shaft furnace which is fed with an excess of coke or coal from above and into which the oxygen is blown in through side nozzles. The oxygen nozzles are located in the upper part of the shaft furnace in the combustion chamber.
  • the object of the present invention is to provide a method and a device which have an improved energy balance and permit gas production regardless of the amount of pig iron.
  • iron coke is produced by mixing fine ore and fine coal with a binder, briquetting and then coking it using a known molded coke process.
  • Iron briquettes are obtained by pressing finely ground ore and coal into briquettes with tar as a binder.
  • ironwood briquettes are obtained, only with other binders, e.g. with sulfite waste liquor.
  • the method according to the invention can be used to produce large amounts of synthesis gases or fuel gases.
  • the amount of gas generated can be increased by adding a coolant to the oxygen in the form of water vapor and / or CO 2 .
  • Additional fuels can be fed into the combustion zone, for example in the form of gases, oils, tars and lumpy coal.
  • the known additives are introduced into the Möller briquetted and small scrap can be added as a coolant will give.
  • An increase in the amount of gas formed can also be brought about by adding blind coke or blind briquettes, ie briquettes without the addition of ore, to the Möller, the temperature being able to be controlled by adding steam or CO 2 .
  • the synthesis gases or fuel gases generated are largely CO 2 -free. In addition, they are largely free of sulfur and dust, which is crucial for many applications.
  • the process according to the invention can be designed to be extremely variable by varying the feed and the energy sources and coolants used, as a result of which, if desired, very different combustion or synthesis gases can be obtained.
  • a device in which the method according to the invention can be carried out consists of a melting furnace of the type specified in the preamble of claim 6, which is designed as a low-shaft melting gasifier with a shortened shaft and a height of less than approximately 10 m, but at least approximately 5 m, and which is divided into a lower melting zone, in which the extraction nozzles for the reaction gases are arranged, a reduction zone located above the melting zone, with lower oxygen nozzles arranged in the border area between the melting zone and the reduction zone, to which additional lines for coolants are connected, and one above the Reduction zone lying combustion and smoldering zone, in which upper oxygen nozzles are arranged.
  • This device largely corresponds to the downhole or blast furnace in terms of loading, brick lining, armor, cooling and hot metal and slag extraction.
  • the device according to the invention enables a considerable reduction in the pressure on the Möller in the melting furnace, which means that low-quality fuels with low strength can also be used.
  • the figure shows a vertical section through a front view of a downflow melt gasifier according to the invention.
  • the low-shaft melting gasifier 70 contains a lower melting zone 80, a middle reduction zone 81 and a combustion zone 82 located above it. Above the combustion zone there is the feed space 84, into which lock systems 79 open, via which the feeder opens material, the Möller, can be entered.
  • the lock systems are arranged in the horizontal cover of the loading area, so that the loading goods fall into the loading zone from above.
  • nozzles 77 for additional oil or gas In the wall of the feed chamber 84 there are nozzles 77 for additional oil or gas, through which the feed chamber can be additionally heated.
  • the nozzles 77 are connected to a ring line 78 via which the additional fuel is supplied.
  • upper oxygen nozzles 74 are arranged in the walls in the combustion zone 82 and are connected to a ring line 73 via which oxygen is fed into the combustion chamber.
  • Oxygen nozzles 75 are arranged, which are also connected to the ring line 73 for oxygen.
  • the middle oxygen nozzles 75 are located in the border area between the reduction zone 81 and the melting zone 80 lying thereunder.
  • the cross section of the downflow melt gasifier 70 tapers. Below the taper are extraction nozzles
  • Walls of the downhole melt gasifier 70 are arranged, which are connected to a ring line 72 for exhaust gas.
  • Coolants in the form of CO 2 or water vapor etc. can be added to the middle oxygen nozzles 75 via additional lines 76.

Abstract

Procédé pour la réduction de minerais de fer avec production simultanée de gaz de synthèse ou de combustion, consistant à introduire une quantité d'oxygène dans le ferrocoke et/ou des briquettes de fer à faible température de carbonisation dans une zone supérieure de combustion et de carbonisation à faible température jusqu'à une température d'environ 900 à 1000°C, et à introduire les gaz ainsi produits par une zone inférieure de réduction, dans laquelle le CO2 produit de la manière connue est réduit à CO par des parties du carbone excédentaire, ledit CO faisant subir, à son tour, au minerai de fer une réduction indirecte. Dans la région limite entre la zone de réduction et la zone de fusion sous-jacente une quantité supplémentaire d'oxygène élève la température à au moins 1600°C et la température est contrôlée par l'adjonction de vapeur et/ou CO2, de sorte que a) à cette haute température le fer réduit ainsi que le laitier sont liquéfiés et s'écoulent vers le bas; alors que le laitier flotte, de la manière connue, sur le fer qui est plus lourd, et de cette manière protège ce dernier d'une réoxydation; b) le CO2 formé est entièrement dissocié pour former du CO2 avec le carbone résiduel, et le gaz de réaction formé, composé essentiellement de CO et de petites quantités de H2, est extrait, alors que la fonte brute carbonisée et le laitier sont retirés de manière sporadique.
EP87901387A 1986-03-12 1987-03-11 Procede et dispositif pour la gazeification d'un bain de fusion Withdrawn EP0263119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3608150 1986-03-12
DE3608150A DE3608150C1 (de) 1986-03-12 1986-03-12 Verfahren und Vorrichtung zur reduzierenden Schmelzvergasung

Publications (1)

Publication Number Publication Date
EP0263119A1 true EP0263119A1 (fr) 1988-04-13

Family

ID=6296114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87901387A Withdrawn EP0263119A1 (fr) 1986-03-12 1987-03-11 Procede et dispositif pour la gazeification d'un bain de fusion

Country Status (3)

Country Link
EP (1) EP0263119A1 (fr)
DE (1) DE3608150C1 (fr)
WO (1) WO1987005634A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191154A (en) * 1991-07-29 1993-03-02 Molten Metal Technology, Inc. Method and system for controlling chemical reaction in a molten bath
US5776420A (en) * 1991-07-29 1998-07-07 Molten Metal Technology, Inc. Apparatus for treating a gas formed from a waste in a molten metal bath

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU663882B2 (en) * 1991-07-29 1995-10-26 Molten Metal Technology, Inc. Method and system for oxidation in a molten bath
DE4313630A1 (de) * 1993-04-26 1994-10-27 Kloeckner Stahl Gmbh Verfahren zur Erzeugung von Metall aus Metallerzen
DE4328164C2 (de) * 1993-08-21 1995-05-24 E S C H Engineering Service Ce Verfahren zur thermisch-metallurgischen Entsorgung von Reststoffen bei der Herstellung von Roheisen in einem koksbeheizten Schachtofen
NL1000838C2 (nl) * 1995-07-19 1997-01-21 Hoogovens Staal Bv Werkwijze en inrichting voor het produceren van ruwijzer door smelting reduction.
AT406380B (de) * 1996-03-05 2000-04-25 Voest Alpine Ind Anlagen Verfahren zum herstellen von flüssigem roheisen oder flüssigen stahlvorprodukten sowie anlage zur durchführung des verfahrens
CN113845954A (zh) * 2021-11-04 2021-12-28 青岛海通新材料科技发展有限公司 一种可高效气化的气化型煤及其制备方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1167368B (de) * 1955-02-14 1964-04-09 Demag Elektrometallurgie Gmbh Betrieb einer Niederschachtofenanlage zum Verhuetten von Erzen
DE3324064A1 (de) * 1983-07-04 1985-01-17 Wilhelm Dr.-Ing. 4130 Moers Schmitt Verfahren und vorrichtung zum reduzieren von eisenerz mit c-haltigen brennstoff und sauerstoff und zur erzeugung eines co(pfeil abwaerts)2(pfeil abwaerts) freien gases
US4556418A (en) * 1984-10-03 1985-12-03 Thermal Systems Engineering, Inc. Process for melting a ferrous burden

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8705634A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191154A (en) * 1991-07-29 1993-03-02 Molten Metal Technology, Inc. Method and system for controlling chemical reaction in a molten bath
US5776420A (en) * 1991-07-29 1998-07-07 Molten Metal Technology, Inc. Apparatus for treating a gas formed from a waste in a molten metal bath

Also Published As

Publication number Publication date
DE3608150C1 (de) 1987-07-02
WO1987005634A1 (fr) 1987-09-24

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