CN104302789B - Ferrum water making device and utilize the process for producing molten iron of this device - Google Patents
Ferrum water making device and utilize the process for producing molten iron of this device Download PDFInfo
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- CN104302789B CN104302789B CN201380025114.5A CN201380025114A CN104302789B CN 104302789 B CN104302789 B CN 104302789B CN 201380025114 A CN201380025114 A CN 201380025114A CN 104302789 B CN104302789 B CN 104302789B
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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
- C21B13/0006—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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
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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
- C21B13/143—Injection of partially reduced ore into a molten bath
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- 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
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- 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
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Abstract
The present invention relates to a kind of ferrum water making device and manufacture method thereof, this ferrum water making device, including raw material preprocessing device, for screening and pretreatment iron ore raw material with make it suitable for reduction；Prereduction reactor, including the first tedge and the second tedge being connected to described first tedge, the iron ore raw material reduced gas prereduction of described conveying of the iron ore raw material from the conveying pretreatment of described raw material preprocessing device；Reduction reactor, for reducing to the partial reduction ferrum carried from described prereduction reactor；Fusion reduction reaction device, utilizes reducing gas that the partial reduction ferrum obtained from described reduction reactor is carried out melting and reducing, to produce molten iron；Ironmaking by-product gas pretreatment unit, for the carbon dioxide mix that will produce in ironmaking by-product gas or iron ore reduction technique reformation to generate reducing gas, and is fed to fusion reduction reaction device or described prereduction reactor by the reducing gas generated；And iron ore reduction process unit, for supplying the carbon dioxide produced in described iron ore reduction technique。
Description
Technical field
The present invention relates to a kind of molten iron iron device and utilize the process for producing molten iron of this device, relate more specifically to the by-product gas of generation in a kind of iron-smelting process of reforming and utilize produced gas that powder iron mine is reduced, produce the device of molten iron by melting and reducing simultaneously and utilize the process for producing molten iron of this device。
Background technology
The powder iron ore reduction technology in the past using fluid bed reduction reactor is nineteen fifties to carry out the reduced iron production technology based on methane gas of supply of hydrogen by reforming methane-steam。US granted patent No. 2821471 or No. 3022156 discloses a kind of main with when more than the hydrogen reduction agent of 90% reaction temperature below 600 DEG C and 5 atmospheric pressure, the technology of reduced iron is produced by the Reduction on Fluidized Bed of iron mine, and US granted patent the 3246978th discloses a kind of based on the produced reducing agent gas of coal (C) gasification, under reaction temperature more than 600 DEG C, by iron mine being reduced the technology producing reduced iron。
The two mode is according to the reducing agent type used, and the physicochemical characteristics change of iron mine, fluidisation properties, solution bonding (sticking) etc. produce the reaction condition of reduced iron can be different。Described patent uses bubbling fluidized bed, develops the iron ore reduction technology of recirculating fluidized bed form on the other hand, so that the micropowder shape iron mine that iron-smelter is discarded to reduce (US granted patent the 5431711st)。
Described technology is continuously obtained to develop into and in a fluidized bed reactor the powder iron mine of less than several millimeters is reduced and produce the commercial technology of reduced iron, such as FINEX technology, also describes a kind of CO utilizing and removing in by-product gas2The reducing agent gas of rear residual, to improve the technology (US granted patent the 5846268th) of molten iron production efficiency。But, reduced iron production technology based on methane gas or coal (C) is mainly also limited to use senior iron mine, and the reduction of the various fine iron ores not used at present (including the magnetic iron ore that the fine powder form below with hundreds of micron exists) is restricted。
In addition, it is desirable to develop a kind of new technology, to overcome a large amount of limitation discharging carbon dioxide in the iron-smelting process based on coal (C), and solve the environmental problem constantly occurred along with the increase of iron and steel output。
Summary of the invention
Goal of the invention
The purpose of embodiments of the invention is in that provide a kind of ferrum water making device and utilize the process for producing molten iron of this device, utilizes the by-product gas produced in iron-smelting process to filter out hydrogen and carbon monoxide and iron ore raw material is reduced, to produce molten iron。
Technical scheme
A kind of ferrum water making device can be provided according to one or more embodiments of the invention, including: raw material preprocessing device, it is used for screening and pretreatment iron ore raw material with make it suitable for reduce；Prereduction reactor, including the first tedge and the second tedge being connected to described first tedge, the described iron ore raw material reduced gas prereduction of the iron ore raw material from the conveying pretreatment of described raw material preprocessing device；Reduction reactor, for reducing to the partial reduction ferrum carried from described prereduction reactor；Fusion reduction reaction device, utilizes reducing gas that the partial reduction ferrum obtained from described reduction reactor is carried out melting and reducing, to produce molten iron；Ironmaking by-product gas pretreatment unit, for the carbon dioxide mix that will produce in ironmaking by-product gas and iron ore reduction technique reformation to generate reducing gas, and is fed to fusion reduction reaction device or described prereduction reactor by the reducing gas generated；And iron ore reduction process unit, for supplying the carbon dioxide produced in described iron ore reduction technique。
Described iron ore reduction process unit according to one or more embodiments of the invention, including:
Second prereduction reactor, carries out prereduction by the reducing gas supplied from described reduction reactor to iron ore raw material；Second raw material preprocessing device, adopts the reducing gas of described second prereduction reactor supply to become be suitable for the iron ore raw material of described second prereduction reactor and be supplied to described second prereduction reactor by iron ore raw material screening and pretreatment；And carbon dioxide pipeline, isolate carbon dioxide from the reducing gas pipeline being connected with described second raw material preprocessing device, and supply carbon dioxide into described ironmaking by-product gas pretreatment unit。
The described ironmaking by-product gas pretreatment unit of one or more embodiment according to the present invention, including: ironmaking by-product gas segregation apparatus, isolate hydrogen from ironmaking by-product gas, and described separated hydrogen is fed to described second tedge；Primary heater, by carrying out heat exchange with the recyclegas circulated through described raw material preprocessing device, so as to supplying heat to the described ironmaking by-product gas isolating hydrogen；First reforming reactor, with producing hydrogen and carbon by isolating the ironmaking by-product gas of hydrogen described in described primary heater additional heat, and is fed to described first tedge by produced hydrogen；And second reforming reactor, it is connected to described first reforming reactor, described second reforming reactor is flowed into together with the carbon dioxide produced in the carbon and the gas combustion by described primary heater that are produced by described first reforming reactor and the carbon dioxide that produces and iron ore reduction device, thus producing carbon monoxide, and the carbon monoxide produced is fed to described fusion reduction reaction device。
One or more embodiment according to the present invention may also include the secondary heater to described second reforming reactor supply heat。
The ironmaking by-product gas pretreatment unit of one or more embodiment according to the present invention, including: ironmaking by-product gas segregation apparatus, isolate hydrogen and described separated hydrogen is fed to described second tedge；Primary heater, carries out heat exchange with the circulating air circulated through described raw material preprocessing device, so as to supplying heat to the described ironmaking by-product gas isolating hydrogen；And tri-reforming device, the carbon dioxide produced by the gas combustion of described primary heater flows into described tri-reforming device together with the carbon dioxide produced in described iron ore reduction process unit, thus producing the reducing gas comprising hydrogen and carbon monoxide, and the reducing gas produced is fed to described fusion reduction reaction device。
One or more embodiment according to the present invention, it is characterised in that the first tedge operates above at 800 DEG C, and described second tedge operates within the scope of 350～650 DEG C。
One or more embodiment according to the present invention, it is characterized in that, it is provided with First Heat Exchanger between described ironmaking by-product gas segregation apparatus and described second tedge, replenish the supply the heat of reducing gas of described second tedge by carrying out heat exchange with the hydrogen discharged from described first tedge and the second tedge, can connect and the second Ore conduit of described first tedge and described second tedge is provided with the second heat exchanger, it is fed to described first tedge after the hydrogen discharged from described second tedge is carried out heat exchange with the partial reduction ferrum flowing through described second Ore conduit, described raw material preprocessing device receives heat from reducing gas pipeline, described reducing gas pipeline supplies reducing gas from reduction reactor。
One or more embodiment according to the present invention, it is characterized in that, fusion reduction reaction device is provided with the hydrocarbon process device for supplying high heat and reducing gas, and can being arranged to the oxygen pipeline of supply pure oxygen on described fusion reduction reaction device, described hydrocarbon process device is the device making the coal cinder of fine coal, coking coal and briquetting form burn。
One or more embodiment according to the present invention, may also include and be connected to described reducing gas pipeline, for isolating the carbon dioxide separation device of carbon dioxide from described reducing gas, may also include and be connected to described carbon dioxide separation device, for the reducing gas pipeline of reduction reactor will be fed to by the reducing gas of described carbon dioxide separation device and described separated carbon dioxide is fed to the carbon dioxide pipeline of described ironmaking by-product gas pretreatment unit, and may also include and be arranged on described carbon dioxide pipeline, for storing the carbon dioxide storage device of described separated carbon dioxide。
One or more embodiment according to the present invention, may also include that steam-gas reforming reactor, is connected to described second raw material preprocessing device, for reforming by described second raw material preprocessing device expellant gas, to produce steam；And hydrogen segregation apparatus, it is connected to described steam-gas reforming reactor, is used for isolating described steam and carbon dioxide。
One or more embodiment according to the present invention, may also include that carbon dioxide pipeline, is connected to described hydrogen segregation apparatus, for described separated carbon dioxide is fed to ironmaking by-product gas pretreatment unit；And hydrogen gas lines, it is connected to described hydrogen segregation apparatus, for described separated hydrogen being fed to described reduction reactor and the first tedge。
According in one or more embodiment of the present invention, described hydrogen gas lines can be formed the 4th heat exchanger, described 4th heat exchanger is by carrying out heat exchange with the gas being fed to described reduction reactor from described fusion reduction reaction device, so as to the hydrogen make thermal source of described hydrogen gas lines, can also include being arranged on described carbon dioxide pipeline for storing the carbon dioxide storage device of described separated carbon dioxide, and described hydrogen gas lines and being connected to the reducing gas pipeline of described raw material preprocessing device, the 3rd heater can be set from described reduction reactor, with to the hydrogen make heat through described 4th heat exchanger。
One or more embodiment according to the present invention, it is possible to provide a kind of process for producing molten iron, including: feed pretreatment step, pretreatment iron ore raw material is with make it suitable for reduce；Pre-reduction procedure, by the feedstock transportation of described pretreatment to the prereduction reactor including the first tedge and the second tedge, and is carried out prereduction by reducing gas；Reduction step, reduces to the partial reduction ferrum being transported to reduction reactor after prereduction；Melting and reducing step, utilizes reducing gas that the partial reduction ferrum obtained from reduction reactor is carried out melting and reducing, to produce molten iron；Ironmaking by-product gas pre-treatment step, by ironmaking by-product gas and iron ore reduction technique in produce carbon dioxide mix and reform, to generate reducing gas, and the reducing gas generated is fed to described melting and reducing step or described pre-reduction procedure；And iron ore reduction processing step, supply the carbon dioxide produced in described iron ore reduction technique。
According in one or more embodiment of the present invention, described ironmaking by-product gas pre-treatment step, it may include: from described ironmaking by-product gas, isolate hydrogen, and described separated hydrogen is fed to described first tedge；By carry out with the recyclegas circulated through described raw material preprocessing device heat exchange heat described in isolate the ironmaking by-product gas of hydrogen and be fed to the first reforming reactor, to produce carbon and hydrogen, and the hydrogen produced is fed to described prereduction reactor；The carbon produced flows into the second reforming reactor with the carbon dioxide of generation in the carbon dioxide produced by described heating and described iron ore reduction technique, thus producing carbon monoxide, and the carbon monoxide produced is fed to described fusion reduction reaction device。
According in one or more embodiment of the present invention, described ironmaking by-product gas pre-treatment step comprises the steps that isolates hydrogen from described ironmaking by-product gas, and described separated hydrogen is fed to described prereduction reactor；By carry out with the recyclegas circulated through described raw material preprocessing device heat exchange heat described in isolate the ironmaking by-product gas of hydrogen；And the described heated ironmaking by-product gas isolating hydrogen is fed to tri-reforming device, to produce the reducing gas including carbon and hydrogen, and the reducing gas produced is fed to described fusion reduction reaction device。
According in one or more embodiment of the present invention, described reducing gas production stage may also include unreacted carbon dioxide recovery and is again recycled to tri-reforming device。
According in one or more embodiment of the present invention, described feed pretreatment step is characterized in that, the reducing gas discharged by described reduction reactor receives heat, make the deformation of described iron ore raw material or adjusting component, to preheat, and described iron ore raw material is any fine powder form in bloodstone, magnetic iron ore, the iron mine of moisture content or iron-smelting process dust。
One or more embodiment according to the present invention, it is characterized in that, described first tedge operates above at 800 DEG C, and described second tedge operates within the scope of 350～650 DEG C, from the described isolated hydrogen of ironmaking by-product gas by carrying out heat exchange with the hydrogen discharged from described first tedge and the second tedge and be fed to described second tedge, and it is arranged on the second Ore conduit connecting described first tedge and the second tedge, and after making the hydrogen discharged from described second tedge carry out heat exchange with the partial reduction ferrum flowing through described second Ore conduit and heating up, it is fed to described first tedge。
According in one or more embodiment of the present invention, described melting and reducing step also includes the hydrocarbon process device by being connected to described fusion reduction reaction device and receives high heat and reducing gas, and receives pure oxygen by oxygen pipeline。
According in one or more embodiment of the present invention, described iron ore reduction processing step comprises the steps that and iron ore raw material is carried out prereduction by being fed to the reducing gas of the second prereduction reactor from described reduction reactor；Iron ore raw material pretreatment is become be suitable for the iron ore raw material of described second prereduction reactor and be supplied to described second prereduction reactor by the reducing gas that employing is fed to the second raw material preprocessing device from described second prereduction reactor；And isolate carbon dioxide from the reducing gas of described second prereduction reactor discharge, and it is fed to described ironmaking by-product gas pre-treatment step。
One or more embodiment according to the present invention, it is characterized in that, the separation of described carbon dioxide is the carbon dioxide separation device by being connected with the second raw material preprocessing device or hydrogen segregation apparatus carries out, in the front end of described hydrogen segregation apparatus, steam-gas reforming reactor is set, to produce steam from the reducing gas flowed into by described second raw material preprocessing device, and it is heated from the described isolated hydrogen of hydrogen segregation apparatus by carrying out heat exchange with the reducing gas being fed to reduction reactor from described fusion reduction reaction device, and it is fed to described first tedge。
Beneficial effect
The carbonated ironmaking by-product gas of bag is reformed and is produced hydrogen-rich reducing agent gas by embodiments of the invention, and selectively the hydrogen in reducing agent gas and carbon monoxide are used for iron ore reduction, the fine iron ore making bloodstone and magnetite-series reduces such that it is able to manufacture molten iron。
And, reclaiming carbon dioxide and utilize iron-smelting process gas carbon dioxide to be reformed, recycles, thus having minimizing carbon dioxide, guaranteeing that substantial amounts of hydrogen reduction agent is conducive to the effect of reduction of low grade iron mine simultaneously。
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the ferrum water making device of the embodiment of the present invention。
Fig. 2 is the schematic diagram of the ferrum water making device of first embodiment of the invention。
Fig. 3 is the schematic diagram of the ferrum water making device of second embodiment of the invention。
Detailed description of the invention
With reference to accompanying drawing and following embodiment, it is possible to be expressly understood advantages of the present invention, feature and the method realizing these。But, the present invention can implement in a variety of ways, it is not limited to embodiment disclosed below。The purpose providing the present embodiment is in that, fully discloses the present invention so that summary of the invention is had overall and understands fully by those skilled in the art, and protection scope of the present invention should be as the criterion with claims。In description in the whole text, identical components be have employed identical accompanying drawing labelling。
Fig. 1 is the schematic diagram of the ferrum water making device of the embodiment of the present invention。Refer to Fig. 1, ferrum water making device according to embodiments of the present invention, raw material preprocessing device 10, ironmaking by-product gas pretreatment unit 20, prereduction/reduction reactor 30 and the fusion reduction reaction device 40 such as including iron mine, utilize ironmaking by-product gas to manufacture molten iron with effective。The ferrum water making device of the embodiment of the present invention can change according to the raw material form used or can arrange attachment device。
Described raw material preprocessing device 10 obtains the general poor value existed with the fine powder form of less than several millimeters by iron ore raw material pipeline 5 supply, and makes it become to be suitable for reduce or adjusting component preheats。
Described raw material preprocessing device 10 is different according to the reduction of iron mine and the form of melting reactor, and when prereduction/reduction reactor 30 is for fixing bed form, it is more favourable that the iron ores particle existed with fine powder form becomes pellet (pellet) form。Especially, it is not only the fine iron ore including below the hundreds of micron of magnetic iron ore being not suitable for blast furnace form reactor, and the fine iron ore of less than tens microns discharged with dust (dust) form in iron-smelting process, it is possible in iron ore raw material preprocessing process, become pellet form。These fine iron ores also can mix with coal or exist with mixed carbon form together with binding agent。
When described prereduction/reduction reactor 30 is fluid bed form, the iron mine of the fine powder form of several thousand microns to several microns, can suitably be screened and pretreatment according to its form and physicochemical properties, to be suitable for the multiple fluidized-bed reactors such as bubbling fluidized bed, circular type's fluid bed or tedge (riser), rotary fluidized bed, cylinder (drum) or Sprayable。
Bloodstone that the iron mine of fine powder form according to embodiments of the present invention includes cannot be directly used to blast furnace form and magnetic iron ore, rudimentary iron mine containing large quantity of moisture, the iron mine etc. of dust (dust) form discharged as iron-smelting process by-product。The iron mine of the fine powder form of the form screening according to described prereduction/reduction reactor 30 can be heated to suitable temperature or produce model deformation by physico-chemical process。Especially, the iron mine comprising large quantity of moisture such as limonite (limonite) can be dried or preheat, and as many in taconite (Taconite) impurity or that iron content is low iron mine can be processed through the raw material pretreatment process such as precrushing or ore dressing。
And, after described ironmaking by-product gas pretreatment unit 20 is recovered in the carbon dioxide in iron ore reduction technique expellant gas by carbon dioxide pipeline 37, ironmaking by-product gas such as coke-stove gas obtains at once supplying carbon dioxide together by ironmaking by-product gas pipeline 6, to carry out mixing reforming, and after screening and separating, by reducing gas pipeline 70 described reducing gas suitably distributed and be fed to fusion reduction reaction device 40。
Its main constituent of reducing gas after described reformation is hydrogen and carbon monoxide, according to the iron mine kind to reduce, suitably described hydrogen and carbon monoxide are supplied in distribution selectively, just can effectively strengthen the reducing power of prereduction/reduction reactor 30 and fusion reduction reaction device 40。For this, ironmaking by-product gas pretreatment unit 20 is not merely with the recuperation of heat of reactor and heat supply system, and utilizes carbon dioxide recovery and reutilization technology suitably to supply the reducing gas being suitable for rudimentary iron ore reduction。
As it has been described above, in an embodiment according to the present invention, by reclaiming and recycle the carbon dioxide produced in iron-smelting process, it is possible to reduce carbon dioxide。
Referring to Fig. 1, in an embodiment according to the present invention, prereduction/reduction reactor 30 is loaded by Ore conduit 52 through the iron ore raw material of raw material preprocessing device 10 pretreatment, described iron ore raw material by prereduction and reduction, and is encased in fusion reduction reaction device 40 by partial reduction ferrum feed-line 54 in described prereduction/reduction reactor 30。
Now, described prereduction/reduction reactor 30 utilizes and passes through the reducing gas that reducing gas pipeline 64 rises and the reformation reducing gas originating from ironmaking by-product gas pretreatment unit 20 passing through reducing gas pipeline 60 supply from described fusion reduction reaction device 40, and the iron mine carried from raw material preprocessing device 10 is carried out prereduction or reduction。
Can the described prereduction/reduction reactor 30 of more than 1 in series or in parallel, to control the reduction reaction speed from iron mine deoxidation according to iron ores particle size and reactor types。Described prereduction/reduction reactor 30 its suitable reduction reaction temperature, pressure limit etc. depend on iron mine form and reactor, when the reducing process of described iron mine is for fixing bed (fixedbed) form, can carry out reducing and roasting under the high temperature more than 900 DEG C。Described prereduction/reduction reactor 30 can also be connected with each other the reactor of various ways。Especially for fluid bed (fluidizedbed) reactor, reaction temperature and fluidisation degree etc. during connection, should be adjusted, to avoid carbon distribution (carbondeposition) or bonding (sticking)。
Generally, bloodstone (hematite) reduces more than normal pressure and at the temperature of 600～850 DEG C smoothly at pressure, and magnetic iron ore (magnetite) reduces smoothly at the temperature of 350～650 DEG C。And, in order to make the rudimentary iron mines such as the Ore of difficult reduction be effectively taking place reduction reaction, send into and regulate the reducing gas separated from ironmaking by-product gas pretreatment unit 20 according to the form of iron mine and reduction reactor。If using substantial amounts of hydrogen reduction agent, the reduction rate of rudimentary iron mine can be increased。
And, fusion reduction reaction device 40 according to embodiments of the present invention utilizes the hydrocarbon process device 80 of supply high heat and reducing gas that the partial reduction ferrum obtained from described prereduction/reduction reactor 30 is carried out melting and reducing, thus manufacturing molten iron 90。Described hydrocarbon process device 80 makes the coal cinder of fine coal, coking coal or briquetting form burn, to provide required heat and reducing gas。
Now, from the viewpoint of reducing carbon dioxide, more preferably utilizing pure oxygen as the medium adjusting caloric value than air, described pure oxygen is supplied by oxygen pipeline 85。When sending into pure oxygen, in order to the reducing gas in reactor permeates and guarantees space, not enough driving force (drivingforce) can pass through to send into and hydrocarbon is adjusted from what ironmaking by-product gas pretreatment unit 20 obtained by hydrocarbon (reducing gas) gas line 70。Moreover, it is also possible to increase reducing and smelting speed by sending into a large amount of hydrogen, thus the reducing gases scale of construction required in reducing reactor and caloric value。
Below, more particularly described below according to the first embodiment of the present invention with reference to Fig. 2。
Fig. 2 is the schematic diagram of the ferrum water making device of first embodiment of the invention, and basic comprising is identical with Fig. 1 with function。But according to the iron mine kind to reduce and characteristic, the composition of invention can change or can arrange attachment device。
According to the first embodiment of the present invention, in order to promote the indirect reduction of the rudimentary iron mine existed with fine powder form, employ the reactor of fluid bed form as prereduction/reduction reactor。Described fluidized-bed reactor by the reducing gas such as carbon monoxide, hydrogen reduce with fine powder form exist iron mine, compared with the fixed bed reactors using blast furnace and shaft furnace (shaft), without carrying out the pretreating process of pellet technique or the sintering process etc. of iron mine, therefore can Simplified flowsheet, and owing to iron mine exists with fine powder form, therefore iron ore reduction speed is fast。
Now, the iron mine variable density when iron mine of fine powder form is according to granular size and reduction, it is suitable for multi-form fluidized-bed reactor。That is, all iron ores particles of less than several millimeters combination of preferred multiple fluidized-bed reactor forms in reducing process, but not a kind of reactor types。Effective iron ore reduction technique so can reduce the carbon distribution or bonding phenomenon that produce when the iron mine to fine powder form reduces, and reduce the loss of dispersing produced because of fluidized-bed reactor form to greatest extent, thus can be realized。This suitably selects fluidized-bed reactor namely can realize according to iron mine form。
In the first embodiment in accordance with the invention, for reduce generally with below hundreds of micron, average grain be distributed as the fine iron ore that the magnetic iron ore form of tens microns exists, it is suitable for the fluidized-bed reactor of tedge (riser) form, and in order to reduce generally with less than several millimeters, average grain be distributed as the fine iron ore that the bloodstone form of hundreds of micron exists, applicable bubbling fluidization bed bioreactor。Under suitable reaction condition, after described fine iron ore contacts with reducing gas and generates reduced iron, fusion reduction reaction device 40 can be made into molten iron 90。
As shown in following formula (1), the iron ore raw material of described magnetite-series is successfully reduced by the reducing gas containing a large amount of hydrogen, and iron mine indirect reduction reaction successfully carries out at the temperature of 350～650 DEG C。
1/4Fe3O4+H2→3/4Fe+H2O----------------------------(1)
Therefore, the iron mine of magnetite-series is mixed into the regular distribution with tens micron particle sizes in raw material preprocessing device 10b, and is processed into and belongs within the scope of GeldartA, therefore carries out reduction at tedge 33,34 and is preferred。Now, it is also possible to by washy iron mine drying technique or Ores many for impurity is carried out pretreatment through ore-dressing technique。Generally, when the thin magnetic iron ore hydrogen of tens microns are reduced, faster there is reduction reaction as reducing agent than carbon monoxide at temperature more than 800 DEG C in the reduction reaction initial stage, is therefore more suitable for by bubbling fluidized bed reduction by tedge (riser) reduction ratio by iron mine。Now, in described pretreating process, it is possible to fine iron ore is preheated, so as to carry out (in advance) reduction at the temperature more than 800 DEG C。Described preheating can be accomplished by, and the portion gas circulation discharged by reduction reactor 32 to thin magnetic iron ore pretreatment of raw material dress 10b and makes its heating by ignition to more than 800 DEG C。
Generally, use the reduction reaction of the magnetite-series of hydrogen, till iron ore reduction rate reaches below 40～50%, fast restore under the reduction temperature more than 800 DEG C, but when percent reduction is more than 40～50%, reduction reaction speed can significantly reduce。Therefore, in order to obtain the iron ore reduction rate of more than 50%, reaction temperature be 350～650 DEG C comparatively suitable。This is because thin magnetic iron ore is reduced by hydrogen, because carbon distribution or bonding can reduce reduction reaction speed while percent reduction raising。For this, connect more than 2 for reduce the tedge of thin magnetic iron ore carry out reducing comparatively suitable。
That is, being adjusted at the temperature more than 800 DEG C by the first tedge 34 percent reduction reaches 40～50%, and makes the second tedge 33 acceleration reduction reaction at 350～650 DEG C of temperature。
The reduced iron so obtained can load fusion reduction reaction device 40 after mixing with the reduced iron of bloodstone series and be reduced。Now, it is also possible to the reduced iron of magnetite-series and bloodstone series is separated loading fusion reduction reaction device 40。For being used for reducing the reducing gas of described magnetite-series iron mine, the hydrogen originating from ironmaking by-product gas pretreatment unit 20-1 is utilized to be conducive to reduction。But, reducing gas can be the form of various mixed gases。Additionally, the reactor now used is not limited to tedge, and the kind of iron mine is not limited to the iron mine of magnetite-series, can including bloodstone series and the iron mine etc. of the non-dusting form as the discharge of iron-smelting process by-product, described reduction reactor can also connect more than 2 according to percent reduction and iron mine holdup time。
With reference to Fig. 2, iron ore raw material is fed to raw material preprocessing device 10b by iron ore raw material pipeline 5b, iron ore raw material is screened by raw material preprocessing device 10b and pretreatment is adapted for reduction, iron ore raw material in described raw material preprocessing device 10b pretreatment is transported to prereduction reactor, and described prereduction reactor is made up of with the second tedge 33 being connected to described first tedge 34 the first tedge 34 of the iron ore raw material carrying described pretreatment。
Iron ore raw material and is reduced from described raw material preprocessing device 10b by the first Ore conduit 52a, the second Ore conduit 52b and the 3rd Ore conduit 52c sequentially movement to first tedge the 34, second tedge 33 and reduction reactor 32。
Namely, the described iron ore raw material being transferred at prereduction reactor 33,34 by reducing gas by prereduction, and be reduced from the partial reduction ferrum of prereduction reactor 33,34 conveying at reduction reactor 32, reducing gas is utilized to carry out melting and reducing at fusion reduction reaction device 40 the partial reduction ferrum obtained from described reduction reactor 32, thus producing molten iron 90。
Additionally, Fig. 2 shows ironmaking by-product gas pretreatment unit 20-1 and iron ore reduction process unit 100-1, described ironmaking by-product gas pretreatment unit 20-1 for mix and reforms ironmaking by-product gas and in iron ore reduction technique generation carbon dioxide to generate reducing gas, and the reducing gas generated is fed to described fusion reduction reaction device 40 or described prereduction reactor 33,34, described iron ore reduction process unit 100-1 is used for supplying described carbon dioxide。
Now, described ironmaking by-product gas pretreatment unit 20-1, including:
Ironmaking by-product gas segregation apparatus 21, isolates hydrogen from ironmaking by-product gas, and described separated hydrogen is fed to described second tedge 33；
Primary heater 12a, carries out heat exchange with the recyclegas in the described raw material preprocessing device 10b recycle gas line 72 circulated, so as to supplying heat to the described ironmaking by-product gas isolating hydrogen；
First reforming reactor 20a, is fed to described first tedge 34 by described hydrogen；And
Second reforming reactor 20b, it is connected to described first reforming reactor 20a, the carbon produced by described first reforming reactor 20a flows into described second reforming reactor together with the carbon dioxide produced in the carbon dioxide burnt completely by the gas of described primary heater 12a and produce and iron ore reduction device 100-1, thus producing carbon monoxide, and the carbon monoxide produced is fed to described fusion reduction reaction device 40。Now, realized by carbon pipeline 18 to described second reforming reactor 20b for carbon。
Mainly it is made up of methane by isolating the ironmaking by-product gas of hydrogen described in described primary heater 12a additional heat, and flow into primary heater 12a by methane pipeline 19, in described first reforming reactor 20a, produce hydrogen and carbon by the reaction such as following formula (2)。
CH4→C+2H2----------------------------------------(2)
Now, the gas temperature through described raw material preprocessing device 10b circulation is more than 800 DEG C。
Being completely burned for the part in the gas of described primary heater 12a, thus supplying carbon dioxide to the second reforming reactor 20b, supplying heat also by secondary heater 12b simultaneously。Remaining gas can be fed to power plant 13a, to produce electric power。Sending into the first tedge 34 at the described first reforming reactor 20a hydrogen produced, described hydrogen temperature can be more than 800 DEG C, and not enough heat is also with burning gases and supplements, and the portion gas discharged from reduction reactor 32 can be used as burning gases。Now, the hydrogen discharged from the second tedge 33 also can be added to the first tedge 34 in the second heat exchanger 11b after heat exchange。
Hydrogen reduction agent gas according to the first embodiment of the present invention is by the coke-stove gas (COG) produced in the process of steel plant's manufacture coke and the carbon dioxide from the iron ore reduction process unit 100-1 expellant gas of the embodiment of the present invention are reclaimed and reform and produce。This is effectively to utilize the technology based on the gas produced in the iron-smelting process of coal。
As shown in following formula (3), the described second reforming reactor 20b carbon (C) to obtaining from the first reforming reactor 20a, the carbon dioxide by carbon dioxide pipeline 37 supply reclaimed from iron ore reduction process unit 100 and reform from the secondary heater 12b supplying heat to the second reforming reactor 20b carbon dioxide obtained and obtain carbon monoxide。
C+CO2→2CO-----------------------------------(3)
It addition, described first tedge 34 operates above at 800 DEG C, the reducing gas (hydrogen) being therefore fed to described first tedge 34 should meet the temperature of more than 800 DEG C。Therefore, it is provided with First Heat Exchanger 11a between ironmaking by-product gas segregation apparatus 21 and described second tedge 33, by carrying out heat exchange with the hydrogen discharged from described first tedge 34 and the second tedge 33, so as to the heat of the reducing gas of described second tedge 33 that replenishes the supply。
Described heat exchange realizes respectively through the first tedge discharge pipe 34a and the second tedge discharge pipe 33a。Now, high-temperature hydrogen at described first tedge discharge pipe 34a and the second tedge discharge pipe 33a upper reaches, high-temperature hydrogen carries out heat exchange with the hydrogen in the hydrogen gas lines 17a of supply low temperature hydrogen in described First Heat Exchanger 11a, simultaneously when the amount deficiency of the hydrogen supplied, hydrogen can be fed to after heat exchange the second tedge 33。
Second heat exchanger 11b is arranged on the second Ore conduit 52b connecting described first tedge 33 and described second tedge 34, and is fed to described first tedge 34 after the hydrogen discharged from described second tedge 33 and the partial reduction ferrum flowing through described second Ore conduit 33 are carried out heat exchange。After described heat exchange, it is fed to the hydrogen of the first tedge 34 is fed to the first tedge 34 with being fed to after the hydrogen of the first tedge 34 mixes from the first reforming reactor 20a by hydrogen gas lines 17a。
Described raw material preprocessing device 10b needs heat for the pretreatment of iron ore raw material, and the reducing gas (recyclegas) now by the reducing gas pipeline 62d being fed to described raw material preprocessing device 10b from described reduction reactor 32 supplies heat。That is, after described high-temperature reducing gas heats described raw material preprocessing device 10b, flowed by recyclegas (reducing gas) pipeline 72。The reducing gas flowing through described recycle gas line 72 is also high temperature, therefore as it has been described above, can make ironmaking by-product gas heat exchange and the burning of dehydrogenation in primary heater 12a。
Iron ore reduction process unit 100-1 according to the first embodiment of the present invention, including:
Second prereduction reactor 31, carries out prereduction by the reducing gas supplied from described reduction reactor 32 to iron ore raw material；
Second raw material preprocessing device 10a, adopts the reducing gas from described second prereduction reactor 31 supply to become be suitable for the iron ore raw material of described second prereduction reactor 31 and be supplied to described second prereduction reactor 31 by iron ore raw material screening and pretreatment；And
Carbon dioxide pipeline 37, from isolating carbon dioxide with the described second raw material preprocessing device 10a reducing gas pipeline 62c being connected, and is fed to described ironmaking by-product gas pretreatment unit 20-1 by carbon dioxide。Iron ore raw material passes through the 5th Ore conduit 52e, the 4th Ore conduit 52d is sequentially transported to the second prereduction reactor 31 and reduction reactor 32 reduces。
Iron ore reduction process unit 100-1 according to the present invention, reducing gas sequentially flows through the second prereduction reactor 31 and the second raw material preprocessing device 10a by reducing gas pipeline 62a, 62b, and be stored in power plant 13b by reducing gas pipeline 62c partial reduction gas, and isolate carbon dioxide from remaining reducing gas。
The separation of described carbon dioxide carries out in carbon dioxide separation device 14, isolated carbon dioxide is fed to described second reforming reactor 20b by carbon dioxide pipeline 37, and from described carbon dioxide separation device 14, isolated reducing gas is mixed by reducing gas pipeline 66 with the gas of the reducing gas pipeline 64 flowing into reduction reactor 32 from described fusion reduction reaction device 40 and is fed to reduction reactor 32。
Now, described carbon dioxide pipeline 37 can arrange carbon dioxide storage device 15。
According to the first embodiment of the present invention, in the iron ore reduction technique of supply carbon dioxide, the fine iron ore using the bloodstone series that average grain is distributed as hundreds of micron size by the reducing gas contain carbon monoxide as reducing gas in a large number reduces and generates reduced iron, is easier to reduce at the temperature of 600～850 DEG C。
The such as following formula of reaction equation now (4)。
1/3Fe2O3+CO→2/3Fe+CO2-------------------------(4)
According in embodiments of the invention, bloodstone series iron mine is mixed into the regular distribution with hundreds of micron particle size in the second raw material preprocessing device 10a, and using bubbling fluidization bed bioreactor to reduce, bubbling fluidization bed bioreactor makes GeldartB grain fluidized。Now, it is also possible to by washy iron mine drying technique or Ores many for impurity is carried out pretreatment through ore-dressing technique。
After pretreating process, iron mine can also pass through to use the reducing gas containing a large amount of carbon monoxides risen from fusion reduction reaction device 40, and after reduction reactor 31 mixes with the reduction of iron ore of magnetite-series, is reduced at reduction reactor 32。Now, reduction temperature is the scope of 650 DEG C～800 DEG C, so that substantial amounts of carbon monoxide promotes reduction。The form of reducing gas is preferably generally a large amount of carbon monoxides risen from fusion reduction reaction device, but is able to exist with the form of various mixed gases。It addition, the reactor now used is not limited to bubbling fluidization bed bioreactor, and the kind of iron mine is not limited to the iron mine of bloodstone series, it may include the iron mine etc. of magnetic iron ore and the non-dusting form as the discharge of iron-smelting process by-product。
It it is the by-product gas discharged from the second raw material preprocessing device 10a or the second prereduction reactor 31 from the described iron ore reduction process unit 100-1 carbon dioxide reclaimed, one part is fed to power plant 13b, to produce electric power, and remaining be recovered and after carbon dioxide separation device 14 is separated into carbon dioxide as recirculation gas in technical process, a part sends into the second reforming reactor 20b, and the remaining carbon dioxide storage device 15 that passes through is stored in underground。Mix with the reducing gas risen from fusion reduction reaction device 40 at the reducing gas that described carbon dioxide separation device 14 is separated and be re-fed into reduction reactor 32。The form of described reforming reactor can be fixing bed or fluid bed form, but is preferably fluid bed form。Fusion reduction reaction device 40 can be sent into from the second reforming reactor 20b carbon monoxide obtained。
The described fusion reduction reaction device 40 partial reduction ferrum to obtaining from reduction reactor 32 utilizes hydrocarbon process device 80a, 80b of supply high heat and reducing gas to carry out melting and reducing, thus producing molten iron 90。
Described hydrocarbon process device 80a, 80b make the coal cinder of fine coal, coking coal or briquetting form burn, to provide heat needed for reactor and reducing gas。Now, from the viewpoint of reducing carbon dioxide, more preferably pure oxygen is utilized than air as the medium adjusting caloric value, when sending into pure oxygen by oxygen pipeline 85, in order to the reducing gas in reactor permeates and guarantee space, not enough driving force (drivingforce) can be supplied by reducing gas pipeline 68 and be adjusted from the second reforming reactor 20b carbon monoxide obtained。Time not enough, also by other hydrocarbon supply line 80b supply。
Below, illustrate according to the second embodiment of the present invention with reference to Fig. 3。
Fig. 3 is the schematic diagram of the ferrum water making device of second embodiment of the invention。For the composition of ferrum water making device and the function of the second embodiment, if no special instructions, identical with first embodiment, but can change at carbon dioxide recovery and the by-product gas reforming method of ironmaking by-product gas segregation apparatus 20-2 or attachment device can be set。
In second embodiment, the fine iron ore flow direction in fluid bed reduction reactor is identical with first embodiment, bloodstone series fine iron ore bubbling fluidization bed bioreactor, magnetite-series fine iron ore after tedge is reduced respectively, in reduction reactor 32 mixing while be reduced and send into fusion reduction reaction device 40。But, the flow direction of the reducing gas of fine iron ore reduction reactor 32 is reformed according to by-product gas and reducing gas endless form can change。
According to the second embodiment of the present invention, use ironmaking by-product gas COG by smelting iron hydrogen that the by-product gas isolated hydrogen of pretreatment unit 20-2 discharged by hydrogen gas lines 17a and first and second tedge 33,34 after First Heat Exchanger 11a carries out heat exchange, send into the second tedge 33。
And, the gas removing hydrogen from the ironmaking by-product gas such as COG or FOG (FINEXOFFGAS) is mainly made up of methane gas, and described methane gas utilizes sends into tri-reforming device 20c through the recyclegas of more than 800 DEG C of raw material preprocessing device 10b circulation and after passing through the 3rd heat exchanger 11c additional heat。Now, after the recyclegas of described raw material preprocessing device 10b circulation passes through the 3rd heat exchanger 11c, a part is fed to power plant 13a, and to produce electric power, all the other can also supply carbon dioxide while supplying heat by burning completely to tri-reforming device 20c。
Another carbon dioxide source being fed to described tri-reforming device 20c can be the portion gas recirculation making to discharge from the second raw material preprocessing device 10a or the second prereduction reactor 31, and by using steam-gas reforming reactor 25 and hydrogen segregation apparatus 27 to separate expellant gas after hydrogen。Now, the gas of separated hydrogen and reducing gas pipeline 64 is after the 4th heat exchanger 11d heat exchange, being fed to the first tedge 34 by hydrogen gas lines 17c as reducing gas, described reducing gas pipeline 64 is connected to fusion reduction reaction device 40 and reduction reactor 32 and supplies reducing gas to described reduction reactor 32。
Now, can by being heated and be fed to the first tedge 34 with the reducing gas heat exchange being fed to raw material preprocessing device 10b from reduction reactor 32 by the hydrogen of described 4th heat exchanger 11d。
The portion gas discharged from described hydrogen segregation apparatus 27 is stored in underground by carbon dioxide storage device 15, and remaining is delivered to tri-reforming device 20c and produces reducing gas and hydrogen and carbon monoxide, as shown in following formula (5)。
CH4+CO2→2CO+2H2-----------------------------------(5)
In described tri-reforming device (20c), the carbon dioxide of non-complete reaction can be recovered and recycled to tri-reforming device 20c by carbon dioxide recirculation line 22。The reducing gas produced by described tri-reforming device sends into fusion reduction reaction device 40 by reducing gas pipeline 68, thus accelerating fusion reduction reaction。Moreover, it is also possible to accelerate reducing and smelting speed by a large amount of hydrogen of sending into, thus the amount of reducing gas required in reducing reactor and caloric value。All the other compositions are identical with first embodiment, but are not limited to above-mentioned change。
The present invention above, with reference to accompanying drawing, embodiments of the invention is illustrated, however, it will be understood by those skilled in the art that when not changing technological thought or essential feature, can otherwise implement。
Therefore, the above embodiments are interpreted as being illustrative of in all respects and nonrestrictive。The scope of the present invention should be as the criterion with claims but not described above, by the form of all changes of the implication of claims, scope and such equivalents derivation or change, belongs to protection scope of the present invention。
Claims (34)
1. a ferrum water making device, including:
Raw material preprocessing device, is used for screening and pretreatment iron ore raw material with make it suitable for reduce；
Prereduction reactor, including the first tedge and the second tedge being connected to described first tedge, the described iron ore raw material reduced gas prereduction of the iron ore raw material from the conveying pretreatment of described raw material preprocessing device；
Reduction reactor, for carrying out prereduction to the partial reduction ferrum carried from described prereduction reactor；
Fusion reduction reaction device, utilizes reducing gas that the partial reduction ferrum obtained from described reduction reactor is carried out melting and reducing, to produce molten iron；
Ironmaking by-product gas pretreatment unit, for the carbon dioxide mix that will produce in ironmaking by-product gas and iron ore reduction technique reformation to generate reducing gas, and is fed to fusion reduction reaction device or described prereduction reactor by the reducing gas generated；And
Iron ore reduction process unit, for supplying the carbon dioxide produced in described iron ore reduction technique,
Wherein, described ironmaking by-product gas pretreatment unit includes: ironmaking by-product gas segregation apparatus, isolates hydrogen from ironmaking by-product gas, and described separated hydrogen is fed to described second tedge。
2. ferrum water making device according to claim 1, wherein,
Described iron ore reduction process unit, including:
Second prereduction reactor, carries out prereduction by the reducing gas supplied from described reduction reactor to iron ore raw material；
Second raw material preprocessing device, adopts the reducing gas of described second prereduction reactor supply to become be suitable for the iron ore raw material of described second prereduction reactor and be supplied to described second prereduction reactor by iron ore raw material screening and pretreatment；And
Carbon dioxide pipeline, isolates carbon dioxide from the reducing gas pipeline being connected with described second raw material preprocessing device, and carbon dioxide is fed to described ironmaking by-product gas pretreatment unit。
3. ferrum water making device according to claim 2, wherein,
Described ironmaking by-product gas pretreatment unit, including:
Ironmaking by-product gas segregation apparatus, isolates hydrogen from ironmaking by-product gas, and described separated hydrogen is fed to described second tedge；
Primary heater, by carrying out heat exchange with the recyclegas circulated through described raw material preprocessing device, so as to supplying heat to the described ironmaking by-product gas isolating hydrogen；
First reforming reactor, with producing hydrogen and carbon by isolating the ironmaking by-product gas of hydrogen described in described primary heater additional heat, and is fed to described first tedge by produced hydrogen；And
Second reforming reactor, it is connected to described first reforming reactor, described second reforming reactor is flowed into together with the carbon dioxide produced in the carbon and the gas combustion by described primary heater that are produced by described first reforming reactor and the carbon dioxide that produces and iron ore reduction device, thus producing carbon monoxide, and the carbon monoxide produced is fed to described fusion reduction reaction device。
4. ferrum water making device according to claim 3, also includes,
Secondary heater, to described second reforming reactor supply heat。
5. ferrum water making device according to claim 2, wherein,
Described ironmaking by-product gas pretreatment unit, including:
Ironmaking by-product gas segregation apparatus, isolates hydrogen and described separated hydrogen is fed to described second tedge；
Primary heater, carries out heat exchange with the circulating air circulated through described raw material preprocessing device, so as to supplying heat to the described ironmaking by-product gas isolating hydrogen；And
Tri-reforming device, the carbon dioxide produced by the gas combustion of described primary heater flows into tri-reforming device together with the carbon dioxide produced in described iron ore reduction process unit, thus producing the reducing gas comprising hydrogen and carbon monoxide, and the reducing gas produced is fed to described fusion reduction reaction device。
6. ferrum water making device according to claim 1, wherein,
Described first tedge operates above at 800 DEG C, and described second tedge operates within the scope of 350～650 DEG C。
7. the ferrum water making device according to any one in claim 1 to 6, wherein,
It is provided with First Heat Exchanger between described ironmaking by-product gas segregation apparatus and described second tedge, replenishes the supply the heat of reducing gas of described second tedge by carrying out heat exchange with the hydrogen discharged from described first tedge and the second tedge。
8. the ferrum water making device according to any one in claim 1 to 6, wherein,
Connecting and be provided with the second heat exchanger on the second Ore conduit of described first tedge and described second tedge, described second heat exchanger is fed to described first tedge after the hydrogen discharged from described second tedge is carried out heat exchange with the partial reduction ferrum flowing through described second Ore conduit。
9. ferrum water making device according to any one of claim 1 to 6, wherein,
Described raw material preprocessing device receives heat from reducing gas pipeline, and described reducing gas pipeline supplies reducing gas from reduction reactor。
10. ferrum water making device according to claim 2, wherein,
Described fusion reduction reaction device is provided with the hydrocarbon process device for supplying high heat and reducing gas。
11. ferrum water making device according to claim 10, wherein,
Described fusion reduction reaction device is provided with the oxygen pipeline for supplying pure oxygen。
12. according to the ferrum water making device described in claim 10 or 11, wherein,
Described hydrocarbon process device is the device making the coal cinder of fine coal, coking coal and briquetting form burn。
13. ferrum water making device according to claim 2, also include,
Carbon dioxide separation device, is connected to described reducing gas pipeline, for isolating carbon dioxide from described reducing gas。
14. ferrum water making device according to claim 13, also include,
Reducing gas pipeline, is connected to described carbon dioxide separation device, for being fed to reduction reactor by the reducing gas of described carbon dioxide separation device；
Carbon dioxide pipeline, for being fed to described ironmaking by-product gas pretreatment unit by described separated carbon dioxide。
15. ferrum water making device according to claim 14, also include,
Carbon dioxide storage device, is arranged on described carbon dioxide pipeline, for storing described separated carbon dioxide。
16. ferrum water making device according to claim 2, also include,
Steam-gas reforming reactor, is connected to described second raw material preprocessing device, for reforming by described second raw material preprocessing device expellant gas, to produce steam；And
Hydrogen segregation apparatus, is connected to described steam-gas reforming reactor, is used for isolating described steam and carbon dioxide。
17. ferrum water making device according to claim 16, also include,
Carbon dioxide pipeline, is connected to described hydrogen segregation apparatus, for described separated carbon dioxide is fed to ironmaking by-product gas pretreatment unit；And
Hydrogen gas lines, is connected to described hydrogen segregation apparatus, for described separated hydrogen is fed to described reduction reactor and the first tedge。
18. ferrum water making device according to claim 17, wherein,
Forming the 4th heat exchanger on described hydrogen pipeline, described 4th heat exchanger is by carrying out heat exchange with the gas being fed to described reduction reactor from described fusion reduction reaction device, so as to the hydrogen make thermal source of described hydrogen gas lines。
19. ferrum water making device according to claim 18, also include,
Carbon dioxide storage device, is arranged on described carbon dioxide pipeline, for storing described separated carbon dioxide。
20. ferrum water making device according to claim 19, wherein,
In described hydrogen gas lines with from described reduction reactor, being connected to the reducing gas pipeline of described raw material preprocessing device, the 3rd heater is set, with to the hydrogen make heat through described 4th heat exchanger。
21. a process for producing molten iron, including:
Feed pretreatment step, pretreatment iron ore raw material is with make it suitable for reduce；
Pre-reduction procedure, by the feedstock transportation of described pretreatment to the prereduction reactor including the first tedge and the second tedge, and is carried out prereduction by reducing gas；
Reduction step, reduces to the partial reduction ferrum being transported to reduction reactor after prereduction；
Melting and reducing step, utilizes reducing gas that the partial reduction ferrum obtained from reduction reactor is carried out melting and reducing, to produce molten iron；
Ironmaking by-product gas pre-treatment step, by ironmaking by-product gas and iron ore reduction technique in produce carbon dioxide mix and reform, to generate reducing gas, and the reducing gas generated is fed to described melting and reducing step or described pre-reduction procedure；And
Iron ore reduction processing step, supplies the carbon dioxide produced in described iron ore reduction technique,
Wherein, described ironmaking by-product gas pre-treatment step includes: isolate hydrogen from described ironmaking by-product gas, and described separated hydrogen is fed to described prereduction reactor。
22. process for producing molten iron according to claim 21, wherein,
Described ironmaking by-product gas pre-treatment step, including:
From described ironmaking by-product gas, isolate hydrogen, and described separated hydrogen is fed to described first tedge；
By carry out with the recyclegas circulated through described raw material preprocessing device heat exchange heat described in isolate the ironmaking by-product gas of hydrogen and be fed to the first reforming reactor, to produce carbon and hydrogen, and the hydrogen produced is fed to described prereduction reactor；
The carbon produced flows into the second reforming reactor with the carbon dioxide of generation in the carbon dioxide produced by described heating and described iron ore reduction technique, thus producing carbon monoxide, and the carbon monoxide produced is fed to described fusion reduction reaction device。
23. process for producing molten iron according to claim 21, wherein,
Described ironmaking by-product gas pre-treatment step, including:
Isolate hydrogen from described ironmaking by-product gas, and described separated hydrogen is fed to described prereduction reactor；
By carry out with the recyclegas circulated through described raw material preprocessing device heat exchange heat described in isolate the ironmaking by-product gas of hydrogen；And
The described heated ironmaking by-product gas isolating hydrogen is fed to tri-reforming device, to produce the reducing gas including carbon and hydrogen, and the reducing gas produced is fed to described fusion reduction reaction device。
24. process for producing molten iron according to claim 23, wherein,
Described reducing gas production stage also includes unreacted carbon dioxide recovery and is again recycled to tri-reforming device。
25. process for producing molten iron according to claim 21, wherein,
In described feed pretreatment step, described reduction reactor the reducing gas discharged receives heat, makes the deformation of described iron ore raw material or adjusting component, to preheat。
26. process for producing molten iron according to claim 25, wherein,
Described iron ore raw material is any fine powder form in bloodstone, magnetic iron ore, the iron mine of moisture content or the dust of iron-smelting process。
27. process for producing molten iron according to claim 21, wherein,
Described first tedge operates above at 800 DEG C, and described second tedge operates within the scope of 350～650 DEG C。
28. according to the process for producing molten iron described in claim 22 or 23, wherein,
From the described isolated hydrogen of ironmaking by-product gas by carrying out heat exchange with the hydrogen discharged from described first tedge and the second tedge and be fed to described second tedge。
29. according to the process for producing molten iron described in claim 22 or 23, wherein,
It is arranged on the second Ore conduit connecting described first tedge and the second tedge, and after making the hydrogen discharged from described second tedge carry out heat exchange with the partial reduction ferrum flowing through described second Ore conduit and heating up, is fed to described first tedge。
30. according to the process for producing molten iron described in claim 22 or 23, wherein,
Described melting and reducing step also includes the hydrocarbon process device by being connected to described fusion reduction reaction device and receives high heat and reducing gas, and receives pure oxygen by oxygen pipeline。
31. process for producing molten iron according to claim 21, wherein,
Described iron ore reduction processing step, including:
By being fed to the reducing gas of the second prereduction reactor from described reduction reactor, iron ore raw material is carried out prereduction；
Iron ore raw material pretreatment is become be suitable for the iron ore raw material of described second prereduction reactor and be supplied to described second prereduction reactor by the reducing gas that employing is fed to the second raw material preprocessing device from described second prereduction reactor；And
The reducing gas discharged from described second prereduction reactor isolates carbon dioxide, and is fed to described ironmaking by-product gas pre-treatment step。
32. process for producing molten iron according to claim 31, wherein,
The separation of described carbon dioxide is the carbon dioxide separation device by being connected with the second raw material preprocessing device or hydrogen segregation apparatus carries out。
33. process for producing molten iron according to claim 32, wherein,
Steam-gas reforming reactor is set in the front end of described hydrogen segregation apparatus, to produce steam from the reducing gas flowed into by described second raw material preprocessing device。
34. process for producing molten iron according to claim 32, wherein,
It is heated by carrying out heat exchange with the reducing gas being fed to reduction reactor from described fusion reduction reaction device from the described isolated hydrogen of hydrogen segregation apparatus, and is fed to described first tedge。
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| KR1020120052097A KR101321928B1 (en) | 2012-05-16 | 2012-05-16 | Apparatus for manufacturing molten irons and method for manufacturing molten irons using the same |
| KR10-2012-0052097 | 2012-05-16 | ||
| PCT/KR2013/004304 WO2013172653A1 (en) | 2012-05-16 | 2013-05-15 | Molten iron production apparatus and molten iron producing method using same |
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| KR102176345B1 (en) * | 2018-10-17 | 2020-11-09 | 주식회사 포스코 | Manufacturing appratus of molten iron reducing emission of carbon dioxide and manufacturing method of the same |
| KR102176350B1 (en) * | 2018-11-22 | 2020-11-09 | 주식회사 포스코 | Device for manufacturing molten iron |
| CN112974825B (en) * | 2021-02-18 | 2024-05-24 | 安徽马钢粉末冶金有限公司 | Reduction method of iron ore powder |
| CN115896378B (en) * | 2022-10-24 | 2023-05-23 | 中国科学院过程工程研究所 | Electric energy heating hydrogen direct reduction iron-making method |
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| KR20010065011A (en) * | 1999-12-20 | 2001-07-11 | 이구택 | Apparatus for manufacturing molten pig iron, and its manufacturing method |
| UA84305C2 (en) * | 2003-12-05 | 2008-10-10 | Поско | Method and device for obtaining of cast iron melt and hot-rolled steel sheet |
| KR100948929B1 (en) * | 2007-12-24 | 2010-03-23 | 주식회사 포스코 | Reducing furnace and apparatus for manufacturing molten iron comprising the same |
| KR100930680B1 (en) * | 2007-12-26 | 2009-12-09 | 주식회사 포스코 | Molten iron manufacturing equipment and molten iron manufacturing method |
| KR101142501B1 (en) * | 2009-12-28 | 2012-05-07 | 주식회사 포스코 | Apparatus for manufacturing molten irons |
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