DE3702875C1 - Process for smelting crude iron and for producing process gas in blast furnaces - Google Patents
Process for smelting crude iron and for producing process gas in blast furnacesInfo
- Publication number
- DE3702875C1 DE3702875C1 DE19873702875 DE3702875A DE3702875C1 DE 3702875 C1 DE3702875 C1 DE 3702875C1 DE 19873702875 DE19873702875 DE 19873702875 DE 3702875 A DE3702875 A DE 3702875A DE 3702875 C1 DE3702875 C1 DE 3702875C1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- blast furnace
- frame
- tuyeres
- compressors
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 9
- 238000003723 Smelting Methods 0.000 title abstract 3
- 239000007789 gas Substances 0.000 claims abstract description 67
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 12
- 239000004571 lime Substances 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910000805 Pig iron Inorganic materials 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 2
- 241001417501 Lobotidae Species 0.000 claims 1
- 108090000623 proteins and genes Proteins 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000571 coke Substances 0.000 abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 7
- 239000001569 carbon dioxide Substances 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 6
- 238000005201 scrubbing Methods 0.000 abstract description 2
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000005021 gait Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-AKLPVKDBSA-N oxygen-19 atom Chemical compound [19O] QVGXLLKOCUKJST-AKLPVKDBSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 201000005569 Gout Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- QVGXLLKOCUKJST-OUBTZVSYSA-N oxygen-17 atom Chemical compound [17O] QVGXLLKOCUKJST-OUBTZVSYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- 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
- C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
-
- 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
- C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
- C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
-
- 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
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
-
- 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
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
-
- 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
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Erschmelzen von Roheisen und zum Bereiten von Nutzgas in Hochöfen aus Eisenerz gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for melting of pig iron and for the preparation of useful gas in blast furnaces from iron ore according to the preamble of claim 1.
Bekannt ist der Hochofen mit Winderhitzern, der mit Koks und mit Heißwind Roheisen und Gichtgas erzeugt. Seine Schmelzleistung läßt sich ohne wirtschaftliche Nachteile nur in engen Grenzen ändern, doch dabei bleibt die Menge des armen Gichtgases an den Ausstoß von Roheisen starr gekoppelt. Zumeist ist es üblich, einen geringen Teil des Kokses durch Heizöl und/oder Staubkohle zu ersetzen, wozu man diese Brennstoffe durch die Formen ins Gestell eindüst. Gleiches ist mit Erdgas und Koksofengas zu erreichen. Dem Wind zugesetzter Sauerstoff begünstigt die Verwendung von Hilfsbrennstoffen. Das Einbringen von heißem Reduktionsgas in die Rast hat man versucht, doch es fand keinen Eingang in die Technik.The blast furnace with hot water heaters is well known Coke and hot iron produced pig iron and blast furnace gas. Its melting performance can be achieved without economic Change disadvantages only within narrow limits, but at the same time remains the amount of poor top gas at the exhaust rigidly coupled by pig iron. It is usually common a small part of the coke from heating oil and / or Dust coal to replace what these fuels injected into the frame through the shapes. Same thing to achieve with natural gas and coke oven gas. The wind added oxygen favors the use of Auxiliary fuels. The introduction of hot reducing gas You tried to rest, but couldn't find one Entrance to technology.
Der neuere Stand ist aus der deutschen Patentschrift 22 61 766 bekannt.The newer version is from the German patent specification 22 61 766 known.
Dieses noch nicht verwirklichte Verfahren arbeitet mit technischem Sauerstoff und rückgeführtem Reduktionsgas statt mit Heißwind. Sein Hochofen ist mit zwei Formenebenen versehen, mit ihnen läßt sich das Geschehen innerhalb des Hochofens schnell und innerhalb weiter Grenzen steuern. Dieses Verfahren vermeidet die direkte Reduktion und fährt mit dem geringst möglichen Kokssatz ohne nennenswerten Überschuß an Gichtgas. Andererseits ist es möglich, mit mehr Brennstoff zu fahren, um mehr Nutzgas herzustellen, dessen Heizwert um vieles reicher ist als der des Gichtgases herkömmlicher Hochöfen, die mit Heißwind fahren.This process, which has not yet been implemented, is working with technical oxygen and recycled reducing gas instead of with hot wind. His blast furnace has two levels of form provided with them, the happening within the blast furnace quickly and within further Control borders. This procedure avoids the direct Reduction and runs with the lowest possible coke rate without any significant excess of top gas. On the other hand is it possible to drive with more fuel to produce more useful gas, its calorific value by much richer than that of top gas Blast furnaces that drive with hot winds.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zu zeigen, das alle Vorteile der DE-PS 22 61 766 wahrt, dabei das Erschmelzen von Roheisen innerhalb einer weiten Spanne einzustellen gestattet und zugleich unbeeinflußt davon die Herstellung von Nutzgas in wählbaren Mengen ermöglicht.The invention is based on the object of a method to show you all the advantages of DE-PS 22 61 766 maintains, thereby the melting of pig iron allowed to adjust within a wide range and at the same time unaffected by the production of Available gas in selectable quantities.
Die Lösung dieser Aufgabe erfolgt mit dem kennzeichnenden Merkmalen des Patentanspruchs 1. Weitere Ausgestaltungen der Erfindung ergeben sich aus den UnteransprüchenThis object is achieved with the characterizing features of patent claim 1. Further refinements of the invention result from the subclaims
Ein Ausführungsbeispiel der Erfindung wird anhand der in Fig. 1 dargestellten Anlage näher erläutert.An embodiment of the invention is explained in more detail with reference to the system shown in FIG. 1.
Der Hochofen 1 gibt Rohgas 9 ab, das in der Gasreinigung 2 entstaubt wird. Das maschinenfein gereinigte Gas 11 gelangt zur Kohlensäurewäsche 3, in der Kohlensäure 12 abgetrennt wird. Das Reingas 13 teilt sich in drei Ströme auf, ins Umlaufgas 15, das der Verdichter 4 in die Rastform 5 fördert, ins Umlaufgas 16, das der Verdichter 6 in die Gestellform 7 drückt, und ins Nutzgas 14, das im Entspanner 8 vom Verfahrensdruck des Reingases auf den Leitungsdruck entspannt wird, um Strom zu gewinnen. Gasmenge 10 stellt die Verluste des Kreislaufs dar.The blast furnace 1 releases raw gas 9 , which is dedusted in the gas cleaning 2 . The machine-cleaned gas 11 arrives at the carbon dioxide wash 3 , in which the carbon dioxide 12 is separated off. The clean gas 13 is divided into three streams, into the circulating gas 15 , which the compressor 4 conveys into the detent shape 5 , into the circulating gas 16 , which the compressor 6 presses into the frame shape 7 , and into the useful gas 14 , which is released from the process pressure in the decompressor 8 Clean gas is expanded to the line pressure to generate electricity. Gas quantity 10 represents the losses of the circuit.
Kennzeichnend für die Erfindung ist, daß die Drehzahlen sowohl der Verdichter 4 und 6 als auch des Entspanners 8 veränderlich sind. Vorzugsweise arbeiten Verdichter und Entspanner mit kreisenden Verdrängern, so daß ihr Fördervolumen linear mit ihrer Drehzahl gekoppelt ist.It is characteristic of the invention that the rotational speeds of both the compressors 4 and 6 and the decocking device 8 are variable. Compressors and expansion devices preferably work with rotating displacers, so that their delivery volume is linearly coupled with their speed.
Temperatur und Menge des Rastgases vor den Formen 5 werden mit den Verhältnissen vom Umlaufgas 15 zu Sauerstoff 17 und zu Staubkohle 18 eingestellt und sicher gehalten. Gleiches gilt fürs Gestellgas vor den Formen 7, auch hier ergeben sich Temperatur und Menge aus den zusammen "eingefeuerten" Umlaufgas 16, Sauerstoff 19, Staubkohle 20 und Kohlensäure 21. Wasserdampf kann dabei Kohlensäure ganz oder zum Teil ersetzen.The temperature and amount of the detent gas in front of the molds 5 are set with the ratios of the circulating gas 15 to oxygen 17 and to dust coal 18 and are held securely. The same applies to the rack gas upstream of the molds 7 , and here too the temperature and the quantity result from the recycle gas 16 "fired" together, oxygen 19 , dust coal 20 and carbon dioxide 21 . Water vapor can completely or partially replace carbon dioxide.
Mit Menge und Temperatur des Gestell- und des Rastgases bekommt man das Geschehen innerhalb des Hochofens in den Griff. Die Temperatur des Roheisens und seine Zusammensetzung lassen sich rasch ändern und sicher halten und ebenso im Schacht die Temperatur der Ausgleichszone und die an der Gicht.With the quantity and temperature of the rack and locking gas you get the events inside the blast furnace under control. The temperature of the pig iron and its composition can be changed quickly and hold safely and the temperature in the shaft as well the equalization zone and those on the gout.
Die Verdichter 4 und 6 fördern das Gas im Kreislauf durch den Hochofen 1, durch die Gasreinigung 2 und durch die Kohlensäurewäsche 3 sowie das Nutzgas 14 durch den Entspanner 8. Der Druck im Kreislauf kann gewählt werden, der Entspanner 8 wirkt als eine Drossel.The compressors 4 and 6 convey the gas in the circuit through the blast furnace 1 , through the gas cleaning 2 and through the carbon dioxide scrubbing 3 and the useful gas 14 through the expansion device 8 . The pressure in the circuit can be selected, the expansion device 8 acts as a throttle.
Die Erfindung erlaubt es, wechselnde Mengen an Nutzgas 14 abzuziehen, ohne dadurch die Schmelzleistung zu ändern. Dazu ist der Entspanner 8, ein umgekehrt arbeitendes Gebläse, vorzugsweise mit kreisenden Verdrängern, über ein stufenloses Getriebe mit dem Stromerzeuger gekuppelt. Die Drehzahl des Stromerzeugers kann sich nicht ändern, weil sie im Takt mit der Netzfrequenz der Stromversorgung läuft. Will man mehr Nutzgas 14 abziehen, ohne dafür den Druck des Reingases 13 zu erhöhen, dann muß dazu die Drehzahl des Entspanners 8 vergrößert werden.The invention allows changing amounts of useful gas 14 to be drawn off without changing the melting capacity. For this purpose, the expansion device 8 , an inverted fan, preferably with rotating displacers, is coupled to the power generator via a continuously variable transmission. The speed of the generator cannot change because it runs in time with the mains frequency of the power supply. If you want to draw off more useful gas 14 without increasing the pressure of the clean gas 13 , then the speed of the expansion device 8 must be increased.
Regeltechnisch ist die Entnahme von Nutzgas 14 mit der Herstellung von Gestellgas verknüpft. Vergrößert man die Drehzahl des Entspanners 8, um mehr Nutzgas 14 abzugeben, dann sinkt der vorgegebene Druck des Reingases 13. Zugleich verringert der Verdichter 6 seine Drehzahl, um weniger Umlaufgas 16 zu fördern. Im Gestell dürfen sich weder Temperatur noch Gasmenge vor den Formen 7 ändern, daher wird mehr Sauerstoff 19, mehr Staubkohle 20, und mehr Kohlensäure 21 in zueinander neu angepaßten Verhältnissen durch die Formen 7 "eingefeuert", um bei erhöhter Abgabe von Nutzgas den gewählten Druck des Reingases 13 zu halten. Wechselnde Entnahme von Nutzgas 14 ändert daher nicht die Zustände im Hochofen 1, Gasmenge und Verteilung der Temperatur in ihm bleiben gleich, ebenso die Schmelzleistung.In terms of control technology, the removal of useful gas 14 is linked to the production of rack gas. If the speed of the expansion device 8 is increased in order to release more useful gas 14 , the predetermined pressure of the clean gas 13 drops. At the same time, the compressor 6 reduces its speed in order to convey less circulating gas 16 . In the frame, neither the temperature nor the amount of gas in front of the molds 7 may change, so more oxygen 19 , more dust coal 20 , and more carbonic acid 21 are "fired" by the molds 7 in newly adjusted proportions in order to achieve the selected pressure with increased release of useful gas to keep the clean gas 13 . Alternating removal of useful gas 14 therefore does not change the conditions in the blast furnace 1 , the amount of gas and the temperature distribution in it remain the same, as does the melting capacity.
Der Druck des Reingases 13 ist ein Maß für den Druck im Hochofen 1. Wird er erhöht, dann steigt die Schmelzleistung ungefähr mit der Wurzel des Druckes. Schmelztechnisch sind Drücke bis 6,0 bar beherrschbar. Ausgehend von der Mindestleistung kann die Herstellung von Roheisen fast verdoppelt werden. Zugleich kann die Menge des Nutzgases 14 von vernachlässigbar wenig bis über 500 Nm³/t Roheisen betragen.The pressure of the clean gas 13 is a measure of the pressure in the blast furnace 1 . If it is increased, the melting capacity increases approximately with the root of the pressure. In terms of melting technology, pressures up to 6.0 bar can be controlled. Based on the minimum output, the production of pig iron can almost be doubled. At the same time, the amount of useful gas 14 can be from negligible little to over 500 Nm³ / t pig iron.
Die Gangart aller Erze ist sehr sauer, auch die Koksasche. Der Hochofen hat daher Kalk nötig, um eine freilaufende Schlacke zu bilden und um das Roheisen zu entschwefeln. Nach dem Stand der Technik wird der gesamte Kalk gegichtet, zum Teil als Stückkalk, zum Teil eingebunden in Sinter und in Pellets.The gait of all ores is very acidic, even that Coke ash. The blast furnace therefore needs lime in order to to form free-running slag and around the pig iron to desulfurize. According to the state of the art entire lime weighted, partly as lump lime, Part embedded in sinter and in pellets.
Die Erfindung schlägt vor, Feinkalk, gegebenenfalls mit anderen Schlackenbildnern, durch die Formen 7 ins Gestell einzubringen, und derart den metallurgischen Bedarf mit ihm vollständig zu decken.The invention proposes to introduce fine lime, possibly with other slag formers, through the molds 7 into the frame, and thus to completely cover the metallurgical requirements with it.
Bei diesem Vorgehen wird der Erzmöller unterhalb 1050°C zu Schwammeisen reduziert. Die saure Gangart schmilzt erst bei viel höherer Temperatur, ohne vorher schädlich zu erweichen. "Kohäsive Schichten" können sich daher nicht bilden.With this procedure, the Erzmöller becomes below 1050 ° C reduced to sponge iron. The sour gait melts only at a much higher temperature without being harmful beforehand to soften. "Cohesive layers" can therefore do not form.
Vor den Formen 7 nimmt in der Flamme der Feinkalk deren Temperatur an und wird vom Ofengas mitgenommen. Dabei bindet er Schwefel, der aus dem Koks kommt, und er hemmt die Reduktion des Siliziums. Unterwegs stößt der Feinakalk an die saure Koksasche und an die saure Gangart und bleibt an ihnen "kleben". Kalk verbindet sich mit Kieselsäure und Tonerdesilikaten, an ihrer Oberfläche steigt dabei die Temperatur beträchtlich. Aus beiden Gründen fließt die entstehende Schlacke schnell ab, weil infolge der Bildungswärme sie beim Entstehen heißer ist als Ofengas mit dem in ihm suspendierten Feinkalk. Bei diesem Entstehen und Abfließen der Schlacke bilden sich keine "kohäsiven Schichten". Die Durchgasung des "nassen" Bereichs des Hochofens 1 wird sehr begünstigt und das Fahren mit niedrigstem Kokssatz sehr erleichtert.Before the molds 7 , the fine lime takes on its temperature in the flame and is carried away by the furnace gas. It binds sulfur that comes out of the coke and inhibits the reduction of silicon. On the way, the fine lime comes into contact with the acidic coke ash and the acidic gait and "sticks" to them. Lime combines with silica and alumina silicates, and the surface temperature rises considerably. For both reasons, the resulting slag flows off quickly because, due to the heat of formation, it is hotter than furnace gas with the fine lime suspended in it. No "cohesive layers" form when the slag is formed and drains away. The gassing of the "wet" area of the blast furnace 1 is very favored and driving with the lowest coke rate is made much easier.
Beim Herstellen großer Mengen von Nutzgas 14 mag es vorteilhaft sein, statt Feinkalk gemahlenen Kalkstein durch die Formen 7 ins Gestell einzubringen. When producing large quantities of useful gas 14 , it may be advantageous to introduce ground limestone through the molds 7 into the frame instead of fine lime.
Der herkömmliche Hochofen mit Heißwind verträgt nur wenig Feinkalk und wenig Staubkohle durch die Formen am Gestell. Er leidet sehr unter "kohäsiven Schichten", und mit Hilfsbrennstoffen vermag er den Kokssatz bei weitem nicht so stark zu senken wie das erfindungsgemäße Verfahren.The conventional blast furnace with a hot wind can only tolerate little fine lime and little dust coal through the forms on the frame. He suffers a lot from "cohesive layers", and with auxiliary fuels he can add coke far less than the inventive method.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873702875 DE3702875C1 (en) | 1987-01-31 | 1987-01-31 | Process for smelting crude iron and for producing process gas in blast furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873702875 DE3702875C1 (en) | 1987-01-31 | 1987-01-31 | Process for smelting crude iron and for producing process gas in blast furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3702875C1 true DE3702875C1 (en) | 1988-04-07 |
Family
ID=6319926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19873702875 Expired DE3702875C1 (en) | 1987-01-31 | 1987-01-31 | Process for smelting crude iron and for producing process gas in blast furnaces |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3702875C1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19812087C1 (en) * | 1998-03-19 | 1999-10-14 | Ferdinand Fink | Blast furnace pig iron production process with minimal coke consumption |
| DE19932334C1 (en) * | 1999-07-10 | 2001-02-15 | Kuettner Gmbh & Co Kg Dr | Smelting residual materials in a vertical furnace comprises operating the furnace with a hot wind and a combined oxygen injection/enrichment of the wind, and adjusting the heat profile in the furnace |
| FR2848123A1 (en) * | 2002-12-04 | 2004-06-11 | Air Liquide | Recuperation of blast furnace gas with carbon dioxide and nitrogen purification to produce an enriched gas for recycling to the blast furnace or for export to other gas users |
| DE102004036767B4 (en) * | 2003-07-30 | 2005-11-24 | Scheidig, Klaus, Dr.-Ing. | Process for the production of pig iron in a blast-furnace operated with oxygen and recycled, from the liberated CO2, with the addition of hydrocarbons |
| WO2009100819A1 (en) | 2008-02-15 | 2009-08-20 | Siemens Vai Metals Technologies Gmbh & Co | Method for melting raw iron while recirculating blast furnace gas by adding hydrocarbons |
| WO2010106387A1 (en) * | 2009-03-17 | 2010-09-23 | Arcelormittal Investigacion Y Desarrollo S.L. | Method for recirculating blast furnace gas, and associated device |
| JP2012516389A (en) * | 2009-01-30 | 2012-07-19 | シーメンス・ファオアーイー・メタルズ・テクノロジーズ・ゲーエムベーハー | Method and plant for producing pig iron or liquid steel semi-finished products |
| EP2719778A1 (en) * | 2012-10-12 | 2014-04-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Blast-furnace process with CO2-lean blast furnace gas recycle and production plant for same |
| EP2719779A1 (en) * | 2012-10-12 | 2014-04-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Blast-furnace process with recycle of a CO-fraction of the blast furnace gas and production plant for same |
| WO2014006511A3 (en) * | 2012-07-03 | 2014-04-17 | Hyl Technologies, S.A De C.V. | Method and system for operating a blast furnace with top-gas recycle and a fired tubular heater |
| CN102356165B (en) * | 2009-03-17 | 2016-11-30 | 安赛乐米塔尔研究与发展有限责任公司 | Method and relevant device for recirculating blast furnace gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2261766C3 (en) * | 1972-12-16 | 1978-06-01 | Ferdinand Dr.Mont. 6374 Steinbach Fink | Process for melting pig iron in blast furnaces |
-
1987
- 1987-01-31 DE DE19873702875 patent/DE3702875C1/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2261766C3 (en) * | 1972-12-16 | 1978-06-01 | Ferdinand Dr.Mont. 6374 Steinbach Fink | Process for melting pig iron in blast furnaces |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19812087C1 (en) * | 1998-03-19 | 1999-10-14 | Ferdinand Fink | Blast furnace pig iron production process with minimal coke consumption |
| DE19932334C1 (en) * | 1999-07-10 | 2001-02-15 | Kuettner Gmbh & Co Kg Dr | Smelting residual materials in a vertical furnace comprises operating the furnace with a hot wind and a combined oxygen injection/enrichment of the wind, and adjusting the heat profile in the furnace |
| FR2848123A1 (en) * | 2002-12-04 | 2004-06-11 | Air Liquide | Recuperation of blast furnace gas with carbon dioxide and nitrogen purification to produce an enriched gas for recycling to the blast furnace or for export to other gas users |
| WO2004052510A3 (en) * | 2002-12-04 | 2004-08-12 | Air Liquide | Method for recovering blast-furnace gas and use thereof for making cast iron |
| DE102004036767B4 (en) * | 2003-07-30 | 2005-11-24 | Scheidig, Klaus, Dr.-Ing. | Process for the production of pig iron in a blast-furnace operated with oxygen and recycled, from the liberated CO2, with the addition of hydrocarbons |
| WO2009100819A1 (en) | 2008-02-15 | 2009-08-20 | Siemens Vai Metals Technologies Gmbh & Co | Method for melting raw iron while recirculating blast furnace gas by adding hydrocarbons |
| US8287620B2 (en) | 2008-02-15 | 2012-10-16 | Siemens Vai Metals Technologies Gmbh | Method for the melting of pig iron with the recirculation of blast furnace gas and with the addition of hydrocarbons |
| JP2012516389A (en) * | 2009-01-30 | 2012-07-19 | シーメンス・ファオアーイー・メタルズ・テクノロジーズ・ゲーエムベーハー | Method and plant for producing pig iron or liquid steel semi-finished products |
| KR101286924B1 (en) * | 2009-03-17 | 2013-07-16 | 아르셀러미탈 인베스티가시온 와이 데살롤로 에스엘 | Method for recirculating blast furnace gas, and associated device |
| CN102356165A (en) * | 2009-03-17 | 2012-02-15 | 安赛乐米塔尔研究与发展有限责任公司 | Method for recirculating blast furnace gas, and associated device |
| WO2010106387A1 (en) * | 2009-03-17 | 2010-09-23 | Arcelormittal Investigacion Y Desarrollo S.L. | Method for recirculating blast furnace gas, and associated device |
| RU2489492C2 (en) * | 2009-03-17 | 2013-08-10 | Арселормитталь Инвестигасьон И Десарролло С.Л. | Blast-furnace gas recirculation method, and device for its implementation |
| AU2009342187B2 (en) * | 2009-03-17 | 2014-08-21 | Arcelormittal Investigacion Y Desarrollo S.L. | Method for recirculating blast furnace gas, and associated device |
| US8992664B2 (en) | 2009-03-17 | 2015-03-31 | ArcelorMittal Investigación y Desarrollo, S.L. | Blast furnace top gas recycling process and corresponding recycling equipment |
| CN102356165B (en) * | 2009-03-17 | 2016-11-30 | 安赛乐米塔尔研究与发展有限责任公司 | Method and relevant device for recirculating blast furnace gas |
| WO2014006511A3 (en) * | 2012-07-03 | 2014-04-17 | Hyl Technologies, S.A De C.V. | Method and system for operating a blast furnace with top-gas recycle and a fired tubular heater |
| CN104540928A (en) * | 2012-07-03 | 2015-04-22 | 伊尔技术有限公司 | Method and system for operating a blast furnace with top gas recirculation and fired tube heaters |
| US9605326B2 (en) | 2012-07-03 | 2017-03-28 | Hyl Technologies, S.A. De C.V. | Method and system for operating a blast furnace with top-gas recycle and a fired tubular heater |
| EP2719778A1 (en) * | 2012-10-12 | 2014-04-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Blast-furnace process with CO2-lean blast furnace gas recycle and production plant for same |
| EP2719779A1 (en) * | 2012-10-12 | 2014-04-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Blast-furnace process with recycle of a CO-fraction of the blast furnace gas and production plant for same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0217331B1 (en) | Process for producing pig iron from finely divided ores | |
| EP0126391B1 (en) | Iron production method | |
| EP0269609B1 (en) | A process and an arrangement for gaining electric energy in addition to producing molten pig iron | |
| AT406485B (en) | METHOD FOR THE PRODUCTION OF LIQUID PIPE IRON OR LIQUID STEEL PRE-PRODUCTS AND SYSTEM FOR IMPLEMENTING THE METHOD | |
| DE3702875C1 (en) | Process for smelting crude iron and for producing process gas in blast furnaces | |
| DE2507140A1 (en) | METHOD AND EQUIPMENT FOR THE PRODUCTION OF BIG IRON FROM OXYDIC IRON ORES | |
| EP2751294A1 (en) | Method for treating waste gases from plants for pig iron production and/or synthesis gas | |
| DE68907227T2 (en) | Smelting reduction process. | |
| AT405293B (en) | METHOD AND DEVICE FOR PRODUCING MOLTEN IRON USING COAL | |
| EP0315825B1 (en) | Pretreatment of a carbonaceous carrier | |
| DE2261766A1 (en) | Blast furnace pig iron prodn process - comprising injection of oxygen and additional fuel through tuyeres at two levels | |
| DD201807A5 (en) | METHOD AND DEVICE FOR DIRECT REDUCTION OF IRON OXIDE | |
| DE2911763C2 (en) | Method and device for regulating the proportions of the air components oxygen, nitrogen, carbon dioxide and water content in reaction processes in the metallurgical sector | |
| DE2126803A1 (en) | Process for the production of steel | |
| AT510313B1 (en) | METHOD FOR INCREASING THE INTRUSION DEPTH OF A OXYGEN BEAM | |
| EP0897430A1 (en) | Method of producing liquid crude iron or liquid steel fabricated materials | |
| AT404254B (en) | METHOD AND SYSTEM FOR THE PRODUCTION OF RAW IRON OR LIQUID STEEL PRE-PRODUCTS FROM IRON-CONTAINING MATERIALS | |
| DE2719348A1 (en) | METHOD FOR BURNING LIME IN THE TURNTABLE | |
| DE2916908A1 (en) | METHOD FOR THE PRODUCTION OF RAW IRON IN THE BLAST FURNACE WITH REDUCTION OF THE SPECIFIC COOKING INSERT BY USE OF GASEOUS EXCHANGE FUELS | |
| DE822089C (en) | Process for the direct extraction of steel from iron ores and scrap | |
| DE2710106B2 (en) | Process for the production of liquid pig iron | |
| DE19917128C1 (en) | Production of crude iron in a blast furnace comprises injecting oxygen at the injection sites through burners, sucking the required partial streams of the contaminated blast furnace gas using a partial vacuum, and burning the gas | |
| DE4122381A1 (en) | METHOD FOR OPERATING A COUPLING OVEN | |
| DE870480C (en) | Process for refining ores | |
| DE864000C (en) | Process for the treatment of fuel-ore mixtures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of the examined application without publication of unexamined application | ||
| D1 | Grant (no unexamined application published) patent law 81 | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |