CN1292830A - Method for producing liquid pig iron and/or steel blanks - Google Patents
Method for producing liquid pig iron and/or steel blanks Download PDFInfo
- Publication number
- CN1292830A CN1292830A CN99803844XA CN99803844A CN1292830A CN 1292830 A CN1292830 A CN 1292830A CN 99803844X A CN99803844X A CN 99803844XA CN 99803844 A CN99803844 A CN 99803844A CN 1292830 A CN1292830 A CN 1292830A
- Authority
- CN
- China
- Prior art keywords
- gas
- heat exchange
- exchange fluid
- pipe
- melting gasifier
- 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.)
- Pending
Links
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
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- 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
-
- 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
-
- 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
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature
-
- 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
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
Abstract
The invention relates to a method for producing liquid pig iron and/or steel blanks from materials containing iron oxide and optionally additives, preferably in the form of pieces and/or pellets. The feedstocks used are reduced to metallized iron ore in a reduction zone. The metallized iron ore is melted in a melt-down gasification zone with the addition of dried solid carbon carriers and oxygen-containing gases. A reduction gas containing CO and H2 is produced and fed into the reduction zone where it is reacted, drained off as top gas, gas washed and optionally supplied to a consumer as an export gas. Before it is washed, the top gas which is drained off from the reduction zone undergoes heat exchange with a heat exchanging fluid using all of its sensible heat. Solid carbon carriers (which are provided in order to be fed into the melt-down gasification zone) are dried with the warmed up heat exchanging fluid. The invention also relates to a system for carrying out the inventive method.
Description
The present invention relates to a kind of best respectively by bulk and/or pelletizing shape iron oxide material and add the method that batching that material forms is made liquid pig iron and steel billet in case of necessity, wherein these batchings are reduced into sponge iron in a reduction zone, and this sponge iron is adding exsiccant solid carbon-contg material and adding under the situation of oxygen-containing gas fusing and produce a kind of carbon monoxide and hydrogenous reducing gas of containing in a molting and gasifying district.React in this reducing gas input reduction zone, at this place and from the reduction zone, discharges and carry out gas scrubbing as furnace top gas, and where necessary as output gas supply user.The invention still further relates to a kind of equipment of implementing the inventive method.
As everyone knows, in order to improve the energy economy of melting gasifier, the carbonaceous material that gasifies in melting gasifier must be dried to an average water capacity (≤15%).There is not the exsiccant carbonaceous material transportation difficulty can occur, because the heat-absorbing action meeting of water capacity causes the deterioration of energy balance and the composition of the gas that influence produces.When carbonaceous material to be gasified is moist, has only by increasing energy input and promptly have only by increase and be blown into the proportion of reduction composition that amount of oxygen in the melting gasifier just improves the gas of generation.
Austrian patent AT PS 380 697 suggestions come pre-hot coal with the installation for blast furnace gas of discharging.Owing to must consider melting gasifier and the reduction furnace added influence when operation, so increased the construction and the working cost of this equipment.In addition, the part of the energy of installation for blast furnace gas is consumed when moisture-free coal, so reduced the efficient of equipment.
European patent EP 0 498 289 A1 disclose the method that a kind of excess energy that produces with internal combustion turbine and steam turbine power station infeeds the coal in melting gasifier or the coal-gas producer.For this reason, excess energy is taken from a utility appliance and is carried out heat exchange by a kind of fluid and infeeds coal dryer.In addition, excess energy also can be discharged gas by the furnace roof of reduction furnace and be supplied with, and the shortcoming of this method is, for example the excess energy of stock gas need be carried out twice heat exchange altogether and just imported the medium that is dried.Because inevitable thermosteresis when heat exchange, this has just increased the installation and operation expense of this equipment.In addition, this method also has a shortcoming, promptly will come moisture-free coal with a moisture eliminator.This need increase equipment and working cost on the one hand, and on the other hand, the coal of dry and preheating produces thermosteresis it is transported to the process of gasifier from moisture eliminator.
So the objective of the invention is to, a kind of method of described that class of beginning of the above-mentioned many shortcomings of prior art can be avoided or obviously be reduced to proposition.
Particularly, this method can guarantee effective, energy-conservation coal drying and preheating, and only needs very little cost of equipment and working cost.Wherein, the enthalpy of the carbonaceous material of exsiccant heating can be used to improve the energy-conservation of melting gasifier.
According to the present invention, this purpose is to realize like this, the stock gas of discharging from the reduction zone--before its washing-carry out heat exchange with a kind of gasiform heat exchange fluid, the solid carbon-contg material that is used to infeed the molting and gasifying district then carries out drying with the heat exchange fluid that heats.
Because the heat exchange fluid of heating carbonaceous material direct and to be dried contacts, so guaranteed best energy utilization.Suitable adjacent spatial arrangement by heat exchanging process and drying process can make line losses keep very little.
As the most handy a kind of rare gas element of heat exchange fluid or inert mixed gas, gas does not chemically react with carbonaceous material and reducing gas under carbonaceous material exsiccant condition like this.
For this reason, in an advantageous embodiments, the industrial nitrogen that uses nitrogen especially for example from the air resolving device, to obtain.Why this industrial nitrogen is preferentially selected for use, is can reach higher drying temperature because of its negligible oxygen level and need less heat exchange fluid therefrom.In addition, the smelting reduction process generally always needs a large amount of oxygen and an air resolving device.So nitrogen obtains easily and is inexpensive.
According to another advantageous embodiments of the present invention, as the process gas of heat exchange flow body and function refrigerative and purification, this gas is preferably by containing carbon monoxide and hydrogenous reducing gas constitutes, and for example the shunting by output gas constitutes.
So the inventive method is not limited to make heat exchange fluid with nitrogen or output gas.In principle, every kind of process gas all can be used as heat exchange fluid, as long as enough inertia that it was stated above having.In addition, must have enough purity, especially not contain dust as the gas of heat exchange flow body and function.
Solid-state carbonaceous material preferably carries out drying by convective principles in a well-known manner.Mode according to this, the enthalpy of heat exchange fluid can be used for energy-conservation especially.But also available other roughly pressed the drying means of distributary principle or the work of following current principle.
As the most handy blocky carbonaceous material of solid carbon-contg material to be dried or molting and gasifying district plan usefulness, particularly blocky coal and/or blocky coke and/or carbonaceous pelletizing and/or carbonaceous briquette.
The granularity of carbonaceous material is approximately 8 to 50 millimeters.Littler or bigger granularity does not meet the requirement in molting and gasifying district on the one hand, and especially when less granularity, carbonaceous material no longer has enough ventilation properties; When bigger granularity, then no longer may guarantee the uniform drying effect of the inventive method on the other hand.
According to a preferred embodiment of the inventive method, the heat exchange fluid between heat exchanging process and the drying process circulates in the loop.Because effusive heat exchange fluid has certain dust from the carbonaceous material drying, so preferably carry out gas scrubbing after drying.
In drying process, or the heat exchange flow scale of construction of losing from the loop in the gas scrubbing process is replenished by the heat exchange fluid that infeeds continuously in the loop.
According to the another advantageous embodiments of the inventive method, stock gas carried out dedusting under hot state before carrying out heat exchange with heat exchange fluid, particularly carry out hot filtration.Because effusive stock gas has a large amount of dusts from the reduction zone, so can cause common obstruction of heat exchanger and partition problem.This problem can be effectively avoided in hot dedusting by stock gas.
After heat exchange fluid and stock gas carried out heat exchange, the temperature of heat exchange fluid preferably was transferred to the temperature range of allowing.This temperature range is about 100～200 ℃, decides on the kind of used coal.
This temperature range is preferably shunted by one that infeeds the heat exchange fluid that do not carry out heat exchange in the heat exchange fluid that has heated and is regulated, wherein to measure generation mixed gas temperature and regulate according to the heat exchange fluid that does not carry out heat exchange that infeeds.
The present invention also proposes a kind of facilities and equipments that are suitable for the inventive method.
Respectively preferably by the iron oxide material of bulk and/or pelletizing shape and this equipment that adds batching manufacturing liquid pig iron that material forms and/or steel billet in case of necessity comprise the reduction reaction furnace of an iron oxide material, the inlet pipe of a melting gasifier and a reducing gas that in this melting gasifier, forms, this melting gasifier of this pipe coupling and reduction reaction furnace, wherein, this inlet pipe is provided with a gas-cleaning installation, the transfer lime that comprises the reduzate that in this reduction reaction furnace, generates of the Reaktionsofen of a connection and melting gasifier, one is stretched out from this reduction reaction furnace, top gas vent pipe with a washer, a solid carbon-containing material loading hopper, a feeding tube that connects the solid carbon-containing material of this loading hopper and this melting gasifier, some feed the inlet pipe of oxygen-containing gas of this melting gasifier and one and are located at the pig iron on this melting gasifier and the outlet of slag, it is characterized by, in the gas vent pipe of top, be provided with a heat exchanger, this heat exchanger outlet side is connected with the pipe of loading hopper by the heat exchange fluid of heating, and this heat exchanger entrance side then is provided with a supply pipe of heat exchange fluid.
Realize utilizing the sensible heat of stock gas to come the solid carbon-containing material that the dried fused gasifier uses with this device first of the present invention and do not had tangible thermosteresis.In addition, this device first of the present invention has been saved the independent moisture eliminator that solid carbon-containing material is used, because drying is directly carried out in loading hopper.Equally also be for the first time to have realized utilizing the sensible heat of the carbonaceous material of drying in the melting gasifier and heating to improve the energy-conservation of melting gasifier, because the thermosteresis that produces equally no longer occurring from a moisture eliminator to the transportation of loading hopper.
According to a kind of preferred structure pattern of present device, loading hopper is connected with the supply pipe of heat exchange fluid with a return conduits, and like this, heat exchange fluid just can circulate in the loop and almost not have volumetric loss.
The return conduits that connects loading hopper and supply pipe preferably has especially gas scrubber of a gas-cleaning installation.Have certain dust and water capacity owing to leave the heat exchange fluid of loading hopper, so heat exchange fluid preferably carried out dedusting and discharge moisture from the loop before entering heat exchange.Like this, be arranged in the particulate abrasive action that gas blower in this root pipe has also been avoided the dust taken away thus.
Another feature according to present device, in the stock gas vent pipe, be provided with a hot gas filtration device in the upstream of heat exchanger, so that stock gas carried out dedusting before entering heat exchanger, thereby avoid the problem that causes by this dust, for example the partition of heat exchanger and blockage problem.
This equipment of the present invention preferably has a temperature bypass pipe that contains a variable valve, and this bypass pipe is communicated with the heat exchange fluid pipeline of pending heat exchange and the heat exchange fluid pipeline that has heated.According to the outlet temperature of the requirement of heat exchange fluid, regulate the mixing of two strands of heat exchange fluids with this variable valve.
Describe method of the present invention and equipment of the present invention in detail below in conjunction with the embodiment that schematically illustrates among Fig. 1.
In a reduction reaction furnace that constitutes as shaft furnace 1 promptly in its reduction zone 2 from above by a feed-pipe 3 pack into blocky iron oxide material for example ore 4 and the addition material 5 that do not bake in case of necessity.Shaft furnace 1 is communicated with melting gasifier 6, and the latter produces a kind of reducing gas from carbonaceous material and oxygen-containing gas, and this reducing gas infeeds shaft furnace 1 by an inlet pipe 7 and with respect to batching 4,5 adverse currents this shaft furnace of flowing through.In inlet pipe 7, be provided with a gas-cleaning installation 8.For attemperation, in reducing gas, added refrigerative reducing gas (not shown).
The carbonaceous material 10 of undried solid block carries out drying at this place from loading hopper 11 of a storage hopper 9 inputs.Dried carbonaceous material 12 is by in an e Foerderanlage 13 input melting gasifiers 6 or its molting and gasifying district 14.
Melting gasifier 6 has some inlet pipe 15 of oxygen-containing gas.In melting gasifier 6, below molting and gasifying district 14, collect the fused solution pig iron 16 and the fused solution slag 17 of emitting through discharge port 18.
In the reduction zone 2 of shaft furnace 1, partial reduction or Restore All become the batching 4,5 of sponge iron for example to import in melting gasifiers 6 through one or more transport pipe 19 with worm conveyor.At the upper section of shaft furnace 1, connected the vent pipe 20 of a stock gas that in the reduction zone, produces.In gas-cleaning installation of these stock gas inputs, so that remove residue dust and steam as washer 21 formations.
The stock gas that has purified in washer 21 is in case of necessity through offering another user as output gas behind the CO2 removal (not shown).
In the upstream of washer 21, in stock gas vent pipe 20, be provided with a heat exchanger 22, heat exchange fluid is imported in these heat exchangers by the gas blower 24 that one of a supply line 23 usefulness are arranged in this pipe.In the upstream of heat exchanger 22, in stock gas vent pipe 20, be provided with a hot gas filtration device 25, stock gas carried out dedusting by this strainer before entering heat exchanger 22.
The heat exchange fluid of heating is by the bottom of a pipeline 26 input loading hoppers 11.The refrigerative heat exchange fluid is then imported gas scrubbers 28 by a return conduits 27 from loading hopper 11, re-enters the supply line 23 from this gas scrubber again.
From temperature bypass pipe 29 of supply line 23 taps, regulate the mixture input channel 26 of refrigerative heat exchange fluid by means of a variable valve 30 that is arranged in wherein by this bypass pipe.
The invention is not restricted to embodiment shown in Figure 1, but comprise that the insider knows, can be used to realize all method of the present invention.
Claims (18)
- One kind best respectively by bulk and/or pelletizing shape iron oxide material and add in case of necessity batching that material forms make liquid pig iron and or the method for steel billet, wherein these batchings are reduced into sponge iron in a reduction zone, this sponge iron is adding exsiccant solid carbon-contg material and is adding under the situation of oxygen-containing gas fusing and produce a kind of carbon monoxide and hydrogenous reducing gas of containing in a molting and gasifying district, in this reducing gas input reduction zone, react at this place and from the reduction zone, discharge and carry out gas scrubbing as furnace top gas, and supply with the user as output gas where necessary, it is characterized by, the stock gas of discharging from the reduction zone-before it washs-carry out heat exchange with a kind of gasiform heat exchange fluid, the solid carbonaceous substance that is used to import the molting and gasifying the district then heat exchange fluid that heated of usefulness carry out drying.
- 2. by the method for claim 1, it is characterized by, as a kind of gas of heat exchange flow body and function or mixed gas, it does not chemically react with carbonaceous material and reducing gas under carbonaceous material exsiccant condition.
- 3. by the method for claim 1 or 2, it is characterized by, as heat exchange flow body and function nitrogen, especially with the industrial nitrogen that for example from a kind of air resolving device, obtains.
- 4. by the method for claim 1 or 2, it is characterized by, as the process gas of heat exchange flow body and function refrigerative and purification.
- 5. by the method for claim 4, it is characterized by, the process gas of refrigerative and purification contains carbon monoxide and hydrogenous reducing gas constitutes by a kind of, and for example one shunting by output gas constitutes.
- 6. by each method of claim 1 to 5, it is characterized by, the drying of solid carbonaceous material is a counter current drying.
- 7. by each method of claim 1 to 6, it is characterized by, as solid carbonaceous material bulk carbonaceous material to be dried, particularly blocky coal and/or blocky coke and/or carbonaceous pelletizing and/or carbonaceous briquette.
- 8. by each method of claim 1 to 7, it is characterized by, heat exchange fluid circulates in the loop.
- 9. by each method of claim 1 to 8, it is characterized by, effusive heat exchange fluid carries out gas scrubbing from the drying of carbonaceous material.
- 10. by the method for claim 8 or 9, it is characterized by, the volumetric loss of carrying out the round-robin heat exchange fluid in the loop is replenished by infeeding in the loop continuously of heat exchange fluid.
- 11. by each method of claim 1 to 10, it is characterized by, stock gas should carry out especially heat filtering of hot dedusting before itself and heat exchange fluid carry out heat exchange.
- 12. by each method of claim 1 to 11, it is characterized by, the temperature of heat exchange fluid should be adjusted to a temperature range of allowing after itself and stock gas carry out heat exchange.
- 13. the method by claim 12 is characterized by, the heat exchange fluid that the temperature of warmed-up heat exchange fluid is not carried out heat exchange by input is regulated.
- 14. preferably respectively by the iron oxide material (4) of bulk and/or pelletizing shape with add the equipment that batching that material (5) forms is made liquid pig iron and/or steel billet in case of necessity, the reduction reaction furnace (1) that comprises an iron oxide material, a melting gasifier (6), the inlet pipe (7) of a reducing gas that in melting gasifier (6), forms, this pipe coupling melting gasifier (6) and reduction reaction furnace (1), wherein, inlet pipe (7) is furnished with a gas-cleaning installation (8), comprise a transfer lime (19) that connects the reaction product that in this reduction reaction furnace (1), generates of reduction reaction furnace (1) and melting gasifier (6), furnace roof furnace gas vent pipe (20) that stretches out from reduction reaction furnace (1) with washer (21), a loading hopper (11) of solid carbon-containing material (12), the feeding tube (13) of a connection loading hopper (11) and melting gasifier (6), some feed the inlet pipe (15) of oxygen-containing gas of melting gasifiers (6) and one and are located at the pig iron (16) on the melting gasifier (6) and the outlet (18) of slag (17), it is characterized by, in stock gas vent pipe (20), be provided with a heat exchanger (22), and heat exchanger (22) outlet side is connected with loading hopper (11) by a pipe (26) of the heat exchange fluid of heating, and heat exchanger (22) inlet side then is provided with a supply pipe (23) of heat exchange fluid.
- 15. the equipment by claim 14 is characterized by, loading hopper (11) is connected with the supply line (23) of heat exchange fluid by a return conduits (27).
- 16. the equipment by claim 15 is characterized by, and in return conduits (27), is provided with a gas-cleaning installation (28) in the downstream of loading hopper (11), especially a gas scrubber.
- 17. by each equipment of claim 14 to 16, it is characterized by, in stock gas vent pipe (20), be provided with a hot gas filtration device (25) in the upstream of heat exchanger (22).
- 18. by each equipment of claim 14 to 17, it is characterized by, supply line (23) is connected with the pipeline (26) that stretches out from heat exchanger (22) by a temperature bypass pipe (29) that contains a variable valve (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA436/1998 | 1998-03-11 | ||
| AT0043698A AT406964B (en) | 1998-03-11 | 1998-03-11 | METHOD FOR THE PRODUCTION OF LIQUID PIG IRON AND / OR STEEL PRE-PRODUCTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1292830A true CN1292830A (en) | 2001-04-25 |
Family
ID=3490568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99803844XA Pending CN1292830A (en) | 1998-03-11 | 1999-02-26 | Method for producing liquid pig iron and/or steel blanks |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1062369A1 (en) |
| JP (1) | JP2002506123A (en) |
| KR (1) | KR20010041710A (en) |
| CN (1) | CN1292830A (en) |
| AT (1) | AT406964B (en) |
| AU (1) | AU3254199A (en) |
| BR (1) | BR9908629A (en) |
| CA (1) | CA2322507A1 (en) |
| PL (1) | PL342950A1 (en) |
| TW (1) | TW490489B (en) |
| WO (1) | WO1999046411A1 (en) |
| ZA (1) | ZA991939B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636510B (en) * | 2006-10-13 | 2012-05-16 | 西门子Vai金属科技有限责任公司 | Method and device for producing molten material |
| CN111218535A (en) * | 2020-03-15 | 2020-06-02 | 苏亚杰 | Method for producing direct reduced iron by heating circulating reducing gas in gas production of molten iron bath coal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT506640B1 (en) | 2008-03-17 | 2010-07-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR PRODUCING LIQUID RAW IRONS OR LIQUID STEEL PREPARED PRODUCTS |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1800856A (en) * | 1926-04-07 | 1931-04-14 | Bradley Linn | Treating iron ore |
| DE1167368B (en) * | 1955-02-14 | 1964-04-09 | Demag Elektrometallurgie Gmbh | Operation of a low shaft furnace for refining ores |
| DE2657249C3 (en) * | 1976-12-17 | 1980-09-04 | Didier Engineering Gmbh, 4300 Essen | Process for the further use of raw furnace gas |
| AT380697B (en) * | 1984-11-07 | 1986-06-25 | Voest Alpine Ag | METHOD FOR MELTING AT LEAST PARTLY REDUCED IRON ORE AND DEVICE FOR CARRYING OUT THIS METHOD |
| JPH0689391B2 (en) * | 1986-03-31 | 1994-11-09 | 株式会社神戸製鋼所 | Fluidized bed reduction method for iron ore |
| US5529599A (en) * | 1995-01-20 | 1996-06-25 | Calderon; Albert | Method for co-producing fuel and iron |
-
1998
- 1998-03-11 AT AT0043698A patent/AT406964B/en not_active IP Right Cessation
-
1999
- 1999-02-26 PL PL99342950A patent/PL342950A1/en unknown
- 1999-02-26 JP JP2000535777A patent/JP2002506123A/en not_active Withdrawn
- 1999-02-26 KR KR1020007009933A patent/KR20010041710A/en not_active Application Discontinuation
- 1999-02-26 AU AU32541/99A patent/AU3254199A/en not_active Abandoned
- 1999-02-26 CN CN99803844XA patent/CN1292830A/en active Pending
- 1999-02-26 WO PCT/EP1999/001248 patent/WO1999046411A1/en not_active Application Discontinuation
- 1999-02-26 EP EP99939141A patent/EP1062369A1/en not_active Withdrawn
- 1999-02-26 CA CA002322507A patent/CA2322507A1/en not_active Abandoned
- 1999-02-26 BR BR9908629-8A patent/BR9908629A/en not_active Application Discontinuation
- 1999-03-05 TW TW088103394A patent/TW490489B/en active
- 1999-03-10 ZA ZA9901939A patent/ZA991939B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636510B (en) * | 2006-10-13 | 2012-05-16 | 西门子Vai金属科技有限责任公司 | Method and device for producing molten material |
| CN111218535A (en) * | 2020-03-15 | 2020-06-02 | 苏亚杰 | Method for producing direct reduced iron by heating circulating reducing gas in gas production of molten iron bath coal |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9908629A (en) | 2000-12-05 |
| ATA43698A (en) | 2000-03-15 |
| JP2002506123A (en) | 2002-02-26 |
| AU3254199A (en) | 1999-09-27 |
| EP1062369A1 (en) | 2000-12-27 |
| PL342950A1 (en) | 2001-07-16 |
| CA2322507A1 (en) | 1999-09-16 |
| ZA991939B (en) | 1999-09-27 |
| WO1999046411A1 (en) | 1999-09-16 |
| TW490489B (en) | 2002-06-11 |
| AT406964B (en) | 2000-11-27 |
| KR20010041710A (en) | 2001-05-25 |
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