EP0910671A1 - Verfahren und vorrichtung zur beschickung eines einschmelzvergasers mit vergasungsmitteln und eisenschwamm - Google Patents
Verfahren und vorrichtung zur beschickung eines einschmelzvergasers mit vergasungsmitteln und eisenschwammInfo
- Publication number
- EP0910671A1 EP0910671A1 EP97924906A EP97924906A EP0910671A1 EP 0910671 A1 EP0910671 A1 EP 0910671A1 EP 97924906 A EP97924906 A EP 97924906A EP 97924906 A EP97924906 A EP 97924906A EP 0910671 A1 EP0910671 A1 EP 0910671A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gasifier
- reduction shaft
- gas
- head
- iron
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 10
- 230000004927 fusion Effects 0.000 title abstract 8
- 230000008569 process Effects 0.000 title description 3
- 239000011248 coating agent Substances 0.000 title 1
- 238000000576 coating method Methods 0.000 title 1
- 230000009467 reduction Effects 0.000 claims abstract description 77
- 239000007789 gas Substances 0.000 claims abstract description 57
- 238000002156 mixing Methods 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract 2
- 239000000428 dust Substances 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- 238000002309 gasification Methods 0.000 claims description 16
- 239000000112 cooling gas Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 3
- 239000000470 constituent Substances 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 206010038743 Restlessness Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- 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
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/08—Screw feeders; Screw dischargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/10—Charging directly from hoppers or shoots
Definitions
- the invention relates to a device according to the preamble of claim 1 and a method using this device.
- DE 30 34 539 AI shows a melter and a reduction shaft, which is arranged at a distance above and in alignment with the melter.
- a plurality of discharge devices in the form of screw conveyors which discharge the sponge iron from this area of the reduction shaft, are provided in a horizontal arrangement vertically through the circumferential wall thereof, so that it spills directly from associated downpipes in the Smelting gasifier is released.
- the downpipes end in the head region of the melter gasifier, arranged centrally around its central axis at a distance from it and from one another.
- the inlet openings for the gasifying agent preferably coal
- outlets for the reducing gas or raw gas generated in the gasifier are also also the inlet openings for the gasifying agent, preferably coal, and likewise the outlets for the reducing gas or raw gas generated in the gasifier.
- the melter gasifier is connected directly to the reduction shaft through the downpipes.
- a large amount of dust therefore gets into the reduction shaft with the untrusted gasification gas.
- the majority of the gasification gas after dedusting in hot gas cyclones is introduced into the reduction shaft as a reducing gas at least 2 m above the screw conveyors of the discharge devices.
- the bed in the reduction shaft between the mouth of the screw conveyors and the reducing gas inlet serves as a gas barrier so that the amount of the non-dedusted gasifier gas that reaches the reduction shaft via the downpipes is limited.
- the larger the shaft diameter the larger this distance must be. With a reduction shaft diameter of 5 m, this is already over 4 m. This makes the reduction shaft correspondingly higher and heavier.
- the dust contains fewer carbon particles, but the problem is similar there.
- It is therefore the object of the present invention to provide the known device comprising a melter gasifier and a reduction shaft arranged above it for reducing iron ore in sponge iron, which is provided by horizontal discharge devices in the lower part of the reduction shaft and a pipe connection into the head of the melting gasifier and melted in it with the aid of a gasifying agent likewise introduced into the head of the melting gasifier and an oxygen-containing gas and reduced to molten pig iron, a reducing gas being generated at the same time, which is removed from the head of the melting gasifier to improve so that the entry of dust from the melter to the reduction shaft via the discharge devices and connecting shafts as well as the return dust due to the wind sifting.
- a reduction shaft 1 is only indicated with respect to its lower floor area, while a melter gasifier 2 is limited to the representation of its upper area.
- Essentially funnel-shaped connecting shafts 4 arranged essentially vertically between the reducing shaft 1 and a dust-blocking container 5 open directly into the horizontal or slightly arched bottom of the reducing shaft 1. Only two connecting shafts 4 are shown in the sectional view; however, several such connecting shafts are arranged in a known manner on the circumference of a circle, the center of which forms the longitudinal axis of the reduction shaft 1.
- Conveyor screws of discharge devices 7 are arranged in a star-like manner in the radial direction with respect to the longitudinal axis of the dust-blocking container 5 or the reduction shaft 1 and connect the connecting shafts 4 from the reduction shaft 1 to inlets 9 of the dust-blocking chamber.
- the dust container 5 is in the upper region via at least one inlet 10 and / or via an inlet 19 of the individual
- Discharge devices 7 acted on with sealing gas in order to maintain a slight excess pressure in relation to the pressure in the melter gasifier 2, so that the entry of dust into the reduction shaft 1 via the downpipe 11 is prevented.
- the washed and cooled gasifier gas is usually used as sealing gas. In most iron ore reduction melting processes, this gas is used to adjust the temperature of the reducing gas. If this cooling gas fails, nitrogen is used as the sealing gas.
- the overpressure is measured via a differential pressure measuring device 15 and the sealing gas is added via a control valve 14.
- the gasification agent is introduced via an inlet 3 arranged on the mixing container 12 at a steep angle.
- This inlet 3 is cooled by adding cooling gas via a control valve 16 controlled by temperature measuring devices 17 and 18 in order to avoid tar deposits and formation of deposits in the inlet 3 .
- cooling gas is also introduced into the dome of the melting gasifier 2 via the mixing container 12 if the temperature in the dome is too high, due to a failure of the coal feed, an unadjusted ratio of oxygen quantity / melting capacity or for other reasons to step. Excessive temperatures in the dome area of the melting gasifier 2 intensify the coal breakdown, which has a very disadvantageous effect on the operation of the melting gasifier 2 and the reduction shaft 1.
- the degree of separation of the hot gas cyclones for dedusting the gasifier gas becomes worse and, in addition to a larger quantity of dust via the downpipe 11, significantly more dust also enters the reduction shaft 1 via the Bustle channel and the bed quickly dusted. In such cases, the temperature measuring device 18 takes over the regulation of the quantity of cooling gas.
- the mixing container 12 is arranged directly above the melting gasifier 2.
- the mixture of hot sponge iron and cold gasifying agent is discharged from the mixing container 12 directly through an inlet 6 into the middle of the melter gasifier 2.
- bridge breakers 13 prevent larger agglomerates from entering the connecting shafts 4. This relieves the load in the connecting shafts 4 of the weight of the material column above them and loosens them up, so that bridges are formed is avoided. If required, an additional bridge breaker can also be installed in the lower area of the connecting shafts 4. The individual bridge breakers 13 are moved back and forth by approximately 30 ° by means of a hydraulic cylinder.
- the use of the dust-blocking container 5 enables the direct connection of each individual discharge device 7 to the single-entry gasifier 2 to be replaced by the common downpipe 11. As a result, the number of connections is reduced from approximately six to eight to one pipe connection. It also enables that shorter and therefore more robust, less maintenance-prone and cheaper discharge devices 7 are used, regardless of the size of the installation, which can also be exchanged without problematic and costly emptying of the reduction shaft 1.
- the screw conveyor When exchanging, the screw conveyor can be screwed into a relatively small pile of material and then pushed in.
- the dust barrier container 5 is usually provided with a manhole cover in the upper area, so that inspection and rapid replacement of these important devices, the continuous operation of which can only be dispensed with with major disadvantages for the operation of the overall system, are possible.
- the addition of the sealing gas via the control valve 14 and the pressure difference measuring device 15 via the at least one inlet 10 into the upper region of the dust barrier container 5 and / or via the inlets 19 into the upper region of the individual discharge devices 7 results in a slight transfer in the addition region pressure, based on the pressure in the melter 2, maintained and thus the entry of dust from the melter 2 in the reduction shaft l prevented. Even the fine particles discharged with the sponge iron are no longer sighted by the gasifier gas flowing up and conveyed back to the reduction shaft 1, but are displaced to the melter gasifier 2 by the downward flow of part of the sealing gas.
- the dust input into the reduction shaft 1 is reduced by a quarter to a third in normal operation compared to the known reduction shafts, and by a lot more in problem cases, which results in a more robust and stable driving style the reduction shaft and the entire system is guaranteed.
- coal particles and gasifier dust which act as binders in the reduction shaft, no more solid agglomerates are formed in the lower part of the reduction shaft 1, without which, with simultaneous reduction in the dusting of the bed in the lower region of the reduction shaft 1, stable operation of the conveying devices with constant Conveyor speed is given.
- the mixing container 12 installed between the dust barrier container 5 and the melting gasifier 2 serves to mix sponge iron and gasifying agent, which results in several advantages.
- the addition of the sponge iron and the gasification agent via the common inlet 6 eliminates six to eight separate inlets for the sponge iron or a large dome attachment, as a result of which the lining in the large dome area of the melter gasifier 2 can be carried out more stably and easily.
- An advantageous design of the dust-blocking container 5 and the mixing container 12, which are each provided with wear pockets, ensures that the sponge iron and in part also the gasifying agent fall onto a material cushion, thereby reducing the wear on the lining.
- the inclined inlet 3 directs the material flow of the gasification means partly onto a material cushion and partly against the material flow of the mixture sliding downwards.
- the water-cooled lining which is otherwise indispensable when the gasification agent is added separately, can be used dispense with inlet 6. This eliminates an assembly which extracts the heat from the melter gasifier 2 and must be replaced at longer intervals because of wear or tear of the weld seams.
- the coal is added separately into the middle of the gasifier and the sponge iron in an outer ring, as is the case with the known devices, the coarser coal particles slide outwards and the fine particles remain in the middle, which is also poorly gasified and stays colder.
- the sponge iron and the gasification agent in the mixing container 12 By mixing the sponge iron and the gasification agent in the mixing container 12 and jointly dispensing the mixture into the middle of the melter gasifier 2, the residual moisture and a large part of the volatile constituents of the coal are felt by sensible heat in the poorly gasified gasifier center degas the iron sponge before the mixture slips out of the cooler center of the carburettor bed into the more gas-filled and hotter outer ring.
- the common Addition with the hot and heavier sponge iron particles, which thereby remain longer in the middle with the fine coal and cause their degassing, also ensures more movement and less segregation, as a result of which the gap volume of the carburettor bed and the
- the temperature-controlled addition of the dedusted cooling gas via the control valve 16 and the temperature measuring device 17 prevents tar deposits and any blockages from occurring in the inlet 3 for the gasifying agent.
- this controlled addition of cooling gas is th temperatures in the dome of the melter 2 used for controlled cooling in this. In this case, more cooling gas is added via the inlet 3 than is necessary for its cooling itself, and the amount of cooling gas is regulated via the temperature measuring device 18 installed in the dome of the melter gasifier 2.
- the discharge devices 7 for the egg sponge are connected to the melter gasifier 2 only via a common connection, consisting of the dust barrier container 5, the downpipe 11, the mixing container 12 and the gasifier inlet 6, the overall cross-section of the connection between Melting gasifier and reduction shaft greatly reduced.
- the number of connections is reduced from six to eight to only one downspout with a slightly larger cross-section than that of the individual connections, since this does not depend on the amount of sponge iron and the additives, but on the size of the objects that can block the downpipe ⁇ is true.
- the bridge breakers 13 have above each discharge device 7 or above each and / or in each preferably funnel-shaped connecting shaft 4 on the one hand the task of relieving the load in the respective connecting shaft 4 of the weight of the material column above it and loosening it up so that no bridges can form under it, and on the other hand in the event that agglomerates form during a standstill form above the bridge breaker 13 to destroy it.
- the distance of a bridge breaker 13 to the inlet 8 of the associated connecting shaft is chosen so that the dimensions of the largest agglomerates that can pass through this area are smaller than the diameter of the narrowest point of the connecting shaft 4.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture Of Iron (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19623246 | 1996-05-30 | ||
DE19623246A DE19623246C1 (de) | 1996-05-30 | 1996-05-30 | Verfahren und Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm |
PCT/DE1997/001038 WO1997046719A1 (de) | 1996-05-30 | 1997-05-16 | Verfahren und vorrichtung zur beschickung eines einschmelzvergasers mit vergasungsmitteln und eisenschwamm |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0910671A1 true EP0910671A1 (de) | 1999-04-28 |
EP0910671B1 EP0910671B1 (de) | 2001-07-04 |
Family
ID=7796621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97924906A Expired - Lifetime EP0910671B1 (de) | 1996-05-30 | 1997-05-16 | Verfahren und vorrichtung zur beschickung eines einschmelzvergasers mit vergasungsmitteln und eisenschwamm |
Country Status (14)
Country | Link |
---|---|
US (1) | US6224647B1 (de) |
EP (1) | EP0910671B1 (de) |
JP (1) | JP2000514498A (de) |
KR (1) | KR20000016202A (de) |
CN (1) | CN1067109C (de) |
AT (1) | AT408550B (de) |
AU (1) | AU721434B2 (de) |
BR (1) | BR9709626A (de) |
CA (1) | CA2255710A1 (de) |
DE (2) | DE19623246C1 (de) |
PL (1) | PL330113A1 (de) |
TW (1) | TW340136B (de) |
WO (1) | WO1997046719A1 (de) |
ZA (1) | ZA974310B (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19739443C2 (de) * | 1997-09-02 | 2000-02-10 | Voest Alpine Ind Anlagen | Vorrichtung zur Erzeugung von Eisenschwamm |
AT409137B (de) | 2000-09-22 | 2002-05-27 | Voest Alpine Ind Anlagen | Verfahren und vorrichtung zur erzeugung eines festbettes |
KR100711777B1 (ko) | 2005-12-26 | 2007-04-25 | 주식회사 포스코 | 장입 방법을 개선한 용철제조방법 및 이를 이용한용철제조장치 |
DE102008026835A1 (de) | 2008-06-05 | 2009-12-17 | Kurt Himmelfreundpointner | Verfahren und Vorrichtung zum Zufördern von förderfähigen Materialien zu Reaktionsöfen |
AT512017B1 (de) * | 2011-09-30 | 2014-02-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung zur roheisenerzeugung |
CN104634504B (zh) * | 2015-02-27 | 2017-01-11 | 水煤浆气化及煤化工国家工程研究中心 | 一种精确测量气化炉渣口压差的装置及其测量方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1087306A (en) | 1965-05-27 | 1967-10-18 | Techmet Ltd | Reduction of iron oxide ores |
SE389877B (sv) * | 1973-01-23 | 1976-11-22 | Asea Ab | Sett och anordning for framstellning av en kolhaltig metallsmelta genom smeltreduktion med undantag fran vad som er skyddat enligt patentet 7205211-1 |
US3850616A (en) | 1973-10-29 | 1974-11-26 | Armco Steel Corp | Inert gas seal for product discharge from a shaft furnace |
US4188022A (en) * | 1978-09-08 | 1980-02-12 | Midrex Corporation | Hot discharge direct reduction furnace |
DE2933056C2 (de) | 1978-11-27 | 1983-06-30 | Bachofen AG, 8610 Uster | Kupplungsvorrichtung zum lösbaren Anschluss der Mündung einer Zweigleitung an eine ein Druckmedium führende Versorgungsleitung |
US4286775A (en) | 1979-07-16 | 1981-09-01 | Midrex Corporation | Apparatus for producing molten iron from iron oxide with coal and oxygen |
DE3034539C2 (de) * | 1980-09-12 | 1982-07-22 | Korf-Stahl Ag, 7570 Baden-Baden | Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz |
AT372109B (de) | 1982-01-11 | 1983-09-12 | Voest Alpine Ag | Vorrichtung zum austragen von heissem gut, insbesondere von eisenschwamm aus einem schachtofen |
NL8201945A (nl) | 1982-05-12 | 1983-12-01 | Hoogovens Groep Bv | Werkwijze en inrichting voor de vervaardiging van vloeibaar ijzer uit oxydisch ijzererts. |
DE3422185A1 (de) | 1984-06-12 | 1985-12-12 | Korf Engineering GmbH, 4000 Düsseldorf | Anordnung aus einem vergaser und direktreduktionsofen |
DE3723137C1 (de) | 1987-07-13 | 1989-03-16 | Voest Alpine Ind Anlagen | Vorrichtung zur Beschickung eines Einschmelzvergasers mit Vergasungsmitteln und Eisenschwamm |
KR100276324B1 (ko) * | 1996-12-20 | 2000-12-15 | 이구택 | 용융환원 장치 및 이를 이용한 용융선철 제조방법 |
-
1996
- 1996-05-30 DE DE19623246A patent/DE19623246C1/de not_active Expired - Fee Related
-
1997
- 1997-05-16 PL PL97330113A patent/PL330113A1/xx unknown
- 1997-05-16 EP EP97924906A patent/EP0910671B1/de not_active Expired - Lifetime
- 1997-05-16 US US09/194,473 patent/US6224647B1/en not_active Expired - Fee Related
- 1997-05-16 AU AU30247/97A patent/AU721434B2/en not_active Ceased
- 1997-05-16 KR KR1019980709770A patent/KR20000016202A/ko not_active Application Discontinuation
- 1997-05-16 JP JP10500084A patent/JP2000514498A/ja active Pending
- 1997-05-16 BR BR9709626A patent/BR9709626A/pt not_active IP Right Cessation
- 1997-05-16 CN CN97195073A patent/CN1067109C/zh not_active Expired - Fee Related
- 1997-05-16 CA CA002255710A patent/CA2255710A1/en not_active Abandoned
- 1997-05-16 WO PCT/DE1997/001038 patent/WO1997046719A1/de not_active Application Discontinuation
- 1997-05-16 DE DE59703961T patent/DE59703961D1/de not_active Expired - Fee Related
- 1997-05-16 AT AT0905597A patent/AT408550B/de not_active IP Right Cessation
- 1997-05-19 ZA ZA9704310A patent/ZA974310B/xx unknown
- 1997-05-20 TW TW086106739A patent/TW340136B/zh active
Non-Patent Citations (1)
Title |
---|
See references of WO9746719A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2000514498A (ja) | 2000-10-31 |
US6224647B1 (en) | 2001-05-01 |
DE19623246C1 (de) | 1997-10-02 |
EP0910671B1 (de) | 2001-07-04 |
AU721434B2 (en) | 2000-07-06 |
AT408550B (de) | 2001-12-27 |
ATA905597A (de) | 2001-05-15 |
KR20000016202A (ko) | 2000-03-25 |
AU3024797A (en) | 1998-01-05 |
TW340136B (en) | 1998-09-11 |
ZA974310B (en) | 1997-12-18 |
CA2255710A1 (en) | 1997-12-11 |
PL330113A1 (en) | 1999-04-26 |
BR9709626A (pt) | 1999-08-10 |
CN1067109C (zh) | 2001-06-13 |
DE59703961D1 (de) | 2001-08-09 |
WO1997046719A1 (de) | 1997-12-11 |
CN1219976A (zh) | 1999-06-16 |
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