• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a process for the reduction of iron oxide-containing material, wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and it is converted into prereduced material in the reduction shaft by means of at least one pre-reduction gas introduced into the fixed bed with a pressure pl. At least part of this prereduced material, preferably the whole prereduced material, is introduced from the reduction shaft into a melter gasifier, in which it is completely reduced by means of a reduction gas under a pressure p2. In this case, a top gas is discharged from the space above the fixed bed from the reduction shaft at a pressure p3, and at least one dust blow-out gas is discharged from the fixed bed at a pressure p4 from the reduction shaft. The relationship pl> p4 and pl> p3, preferably also p4> p3, applies here. Furthermore, the invention relates to a device for carrying out such a method.
    公开号:AT512017A1
    申请号:T1421/2011
    申请日:2011-09-30
    公开日:2013-04-15
    发明作者:
    申请人:Siemens Vai Metals Tech Gmbh；
    IPC主号:
    专利说明:

    1 200822816 • * * * * * · · ··· • · · · · · ·
    Confession
    Name of the invention
    Method and apparatus for the production of pig iron Technical field
    The invention relates to a process for the reduction of iron oxide-containing material, wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and it is converted in the reduction shaft by means of at least one pr plied into the fixed bed prereduction gas, the iron oxide-containing material in prereduced material, and at least a part of this prereduced material, preferably the whole prereduced material, is introduced from the reduction shaft into a melter gasifier, in which it is completely reduced by means of a reduction gas under a pressure p 2.
    Furthermore, the invention relates to an apparatus for carrying out such a method.
    State of the art
    There are methods for the reduction of iron oxide-containing material in which a fixed bed with iron oxide-containing material in a reduction shaft exposed to a prereduction gas, flows through it, and thereby converted into vorreduziertes material. The prereduced material is then introduced into a melter gasifier in which a reducing gas causes further reduction.
    After flowing through the fixed bed, the spent prereduction gas is discharged as a top gas from the space above the fixed bed of the reduction shaft. Such a method is, for example, the COREX® method.
    REPLACED 200822816
    2
    A problem arises in such methods in that in the reduction shaft dusty material - which is under dusty material, also called dust for short, particles are to be understood with a particle diameter of up to about 500 pm - is registered or produced in the reduction shaft. Entry can be made, for example, with the prereduction gas, with the iron oxide-containing material, or with the Moellerzugabe also necessary for the Vorreduktions- and reduction reactions in the reduction shaft. Dust-like material can form in the reduction shaft, for example, by abrasion and decomposition processes as a result of phase transformations.
    Part of the dust is torn out of the fixed bed by the flow of the prereduction gas and discharged out of the reduction shaft with the top gas. Another part of the dust is due to the flow of
    Pre-reducing gas deposited in certain areas of the fixed bed of iron oxide-containing material and prereduced material. Such dust deposits obstruct gas flows, so that it is well-gassed, less well-gassed and virtually non-gassed zones in the fixed bed. The worse a zone of pre-reduction gas is through, the less well reduction processes can proceed in it. Accordingly, the dust influences the productivity of the reduction pit or the degree of reduction of the prereduced material, which is defined as the ratio of the oxygen removed by reduction to the reduction-removable oxygen in the material to be reduced.
    Especially in the lower part - that is, below the Bustle, through which pre-reduction gas is introduced into the reduction shaft - a COREX®-ReduktionsSchachtes it comes to particularly pronounced dust deposits, because on the one hand downpipes - which serve to introduce prereduced material in the melter gasifier - dust from the melter gasifier through in the direction of the reduction shaft
    | FOLLOW-UP 3 200822816 ♦ · »*« «» «» »· · · · ·« · «· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ····························· On the other hand, the gas streams flowing via the downpipes in the direction of the reduction shaft prevent dusts from leaving the reduction duct via the downpipes in the direction of the melter gasifier. The dusts deposited in the lower part tend to agglomerate. Specifically, the dusts introduced through the downpipes have a high agglomeration tendency due to their contents of alkalis or low-melting alkali-containing slag phases. The dusts introduced into the reduction shaft via the addition of Möller and the dusts resulting from attrition and / or decomposition in the reduction shaft tend - in particular in slightly moving deposition zones - due to the formation of very fine crystals of metallic iron and / or wustite and their entanglement under the prevailing reduction conditions also for the formation of agglomerates. Agglomeration of dusts present in gaps of the fixed bed results in solidification of the fixed bed with formation of material bridges. There may be solidified areas that prevent slippage of material to the devices that carry vorreduziertes material from the reduction shaft. This hinders regular operation of the reduction shaft, which must be turned off and mined for the production of regular operating conditions. Such evacuation means decreasing productivity.
    Summary of the Invention Technical Problem
    It is the object of the present invention to reduce or avoid the formation of dust deposits in the reduction shaft, thereby reducing or avoiding agglomeration problems.
    REPLACED 200822816
    Technical solution
    This task is solved by
    A process for the reduction of iron oxide-containing material, wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and in the reduction shaft is converted by at least one with a pressure pl introduced into the fixed bed prereduction gas, the iron oxide-containing material in prereduced material, and at least a portion of this prereduced material Preferably, the entire prereduced material is introduced from the reduction shaft into a melter gasifier, in which it is completely reduced by means of a reducing gas under a pressure p2, and wherein a top gas is discharged from the space above the fixed bed from the reduction shaft with a pressure p3, characterized in that at least one dust blow-off gas is discharged from the fixed bed at a pressure p4 from the reduction shaft, and the relationship pl> p4 and pl> p3, preferably also p4> p3, applies.
    Under "pre-reduce" is to be understood a degree of reduction of greater than 70%, preferably greater than 80%, more preferably up to 90% or greater, most preferably up to 95%, wherein 90% and 95% are included with these formulations. Under "finish reduce" is to be understood as a degree of reduction of more than 95%, preferably 98% or higher, more preferably 99% or higher.
    Basically, the degree of reduction is after the "Vorreduzieren". always smaller than after the "finish reduction", ie there are two reduction steps.
    Under Topgas is understood to be the pre-reduction gas consumed after flowing through the fixed bed, which is discharged from the rum above the fixed bed of the reduction shaft.
    REPLACED 200822816
    Advantageous Effects of the Invention
    In the method according to the invention, dust is conveyed out of the reduction shaft not only by means of the top gas, but also by means of a dust blow-off gas discharged from the fixed bed. This reduces the amount of dust that deposits in the fixed bed and causes agglomeration.
    By adjusting the ratio of the pressures p3 and p4, the ratio of the amounts of gas withdrawn as the top gas and the dust blowout gas can be adjusted.
    The deduction of the dust blow-off gas can be effected by means dedicated to it, independently of the flow of the pre-reduced material in the direction of the melter gasifier.
    According to a preferred embodiment of the method according to the invention, at least part of the at least one dust blow-off gas is conducted at least during part of the path to be covered by the prereduced material during introduction into the melter gasifier between the reduction shaft and the melter gasifier, together with this pre-reduced material in the direction of the melter gasifier.
    When dust blowing gas is passed along with the pre-reduced material in the direction of the melter gasifier, the dust is transported together with the pre-reduced material directly or indirectly in the melter gasifier, where it is at least partially processed into the end products pig iron and slag. otherwise
    | REPLACED 200822816 6
    blown-out dust would have to be returned to the melter gasifier or otherwise used by means of a special device.
    According to one embodiment of the method according to the invention, the relationship p4> p2 applies. Especially when dust blowing gas is passed together with pre-reduced material in the direction of the melter gasifier, the introduction of dust from the melter gasifier is thereby avoided in the reduction shaft by standing under p2 reducing gas.
    According to another embodiment of the method according to claim 2 according to the invention, the relation p2> p4 applies and the prereduced material is brought in one or more stages under a gas intermediate pressure pZ before or while the prereduced material is introduced into the melter gasifier, where pZ ^ p2.
    Normally, when introducing the prereduced material into the melter gasifier, pZ = p2. If an additional purge gas is used, pZ is a few mbar higher than p2.
    For example, during the process, the intermediate gas pressure pZ of pZip4 is increased to pZ £ p2.
    This makes it possible to prevent the introduction of dust from the melter gasifier into the reduction shaft by reducing gas under p 2 when p 2> p 4. This is because a flow of the reducing gas is prevented by the downpipes in the direction of reduction shaft.
    In this case, advantageously that pre-reduced material from the reduction shaft, which is introduced into the melter carburetor, cached before introduction into the melter gasifier in an intermediate container, wherein in the intermediate container between the upper end of the material cushion formed in the intermediate storage - that is, the inflowing
    I FOLLOW-UP I 200822816 7:
    Pre-reduced material facing side of the material cushion - and the lower end of this material cushion - that is, the end of the material cushion, from which prereduced material is withdrawn in the direction of the melter gasifier 4 - a pressure difference of ÄpZw prevails. A dust discharge gas having a dust discharge gas pressure p5 is withdrawn from the intermediate tank, where p5 <p4 and p5 <p2. For ΔρΖΜ, Apzw is less than or equal to (p2 - p5), ie Apzw ^ (p2 - p5). ΔρΖΜ ensures that no short-circuiting flow occurs between the dust discharge gas discharging dust discharge gas and the melter gasifier, which would reduce or suppress supply of reducing gas into the reduction reactor via the prereduction gas supply line 2.
    When dust-laden gas, which flows from the melter gasifier through the intermediate container in the direction of the reduction reactor, flows through the material cushion in the intermediate container, the dust in the interstices of the material cushion partially separates. The more dust is separated, the higher Δρ2Β due to the increasing flow resistance, the gas must overcome to pass through the material cushion.
    In one embodiment, the dust discharge gas comprises the dust blowout gas, and is p4 = p5.
    According to one embodiment of the method according to the invention, the prereduced material is brought under the intermediate gas pressure pZ by introducing the prereduced material into an intermediate container with pressure-lock devices or successively into several intermediate containers with pressure-lock devices.
    According to one embodiment of the method according to the invention, pl> p2.
    REPLACEMENT 200822816 8 * § «I« t f * · «· · · ·
    X **. .1..i: «·
    The prereduction gas can come from different sources. For example, it can come from an external gas source. An external gas source is to be understood as meaning a gas source in which no steps of the method according to the invention for the prereduction of the iron oxide-containing material or for the reduction of the prereduced material take place in order to provide the prereduction gas. These may be, for example, natural gas, refinery gases, coke oven gas, or gases from coal gasification / degassing processes.
    The prereduction gas can also come from internal gas sources. An internal gas source is to be understood as meaning a gas source in which steps of the method according to the invention for prereduction of the iron oxide-containing material or for reduction of the prereduced material take place for providing the prereduction gas. For example, it may be a suitably treated top gas, the preparation may include, for example, dedusting, CO2 removal, heating, cooling, compression. Another example is the use of reducing gas obtained in the melter gasifier of a COREX® process, the melter gasifier. The reducing gas withdrawn from the melter gasifier is generally referred to by the term generator gas. This generator gas can be used as prereduction gas after appropriate treatment such as dedusting and cooling in the reduction shaft of the process according to the invention. According to another variant of its use, the generator gas can be used in another reduction shaft for reduction, from which it can be deducted after fulfilling its reduction task and used after appropriate treatment analogous to the top gas.
    It is also possible to use mixtures of external and internal gas sources as prereduction gas.
    REPLACED 200822816 9
    I
    According to one embodiment of the method according to the invention, two or more pre-reducing gases which are different from each other are introduced into the fixed bed, wherein for each two pre-reduction gases introduced directly adjacent horizontally, the pre-reduction gas introduced in each case has a higher pressure than the higher introduced one Vorreduktionsgas.
    In such a process, the higher prereduction gas flows towards the surface of the packed bed, while the deeper prereduction gas also flows in the opposite direction and, correspondingly, discharge of dust blowing gas from regions of the packed bed below the lowest level of introduction of prereduction gas into the reduction pit lie, allows. It is advantageous that pre-reduction gases can be introduced with different reduction power at different locations in the reduction shaft. This allows better control of pre-reduction and thus increased productivity.
    Compared to the prior art can be achieved with the inventive method, a higher availability of the reduction shaft, which is correspondingly more productive and can be designed smaller. The use of hitherto problematic feedstocks with a high proportion of dust or a great tendency to form dust in the reduction shaft is also made possible.
    Another object of the present invention is an apparatus for performing a method according to the invention, comprising a reduction shaft, at least one prereduction gas supply line opening into the reduction shaft, a top gas outlet emerging from the reduction shaft, a melter gasifier REPLACED | 10
    200822816 an introduction system for the introduction of material prereduced in the reduction shaft into the meltdown gasifier, a dust discharge gas discharge originating from the reduction shaft.
    The introduction system for introducing material prereduced in the reduction shaft into the melter gasifier can be, for example, one or more lines, intermediate containers,
    Pressure-lock devices and metering devices for the controlled supply of the pre-reduced material from the reduction shaft into the melter gasifier. It can also include, for example, pneumatic conveying lines or conveyor belts or downpipes. The metering device can be designed, for example, in the form of screw conveyors or rotary valves.
    A melter gasifier is understood to mean a device in which introduced pre-reduced material is completely reduced and melted by means of a reduction gas obtained by gasification of carbon carriers with technically pure oxygen under a pressure of the reducing gas of from 3 to 5 bar absolute or higher and at a temperature of the reducing gas of about 900 to 2400 ° C - on the fixed bed surface up to the nozzle level for the injection of the technically pure oxygen. A blast furnace is not to be understood by the term melter gasifier.
    Preferably, the introduction system for introducing material prereduced in the reduction shaft into the melter gasifier also comprises at least part of the dust blow-off gas discharge. This makes it possible
    Discharge dust blowing gas together with the pre-reduced material from the reduction shaft.
    Preferably, the introduction system comprises the introduction of material prereduced in the reduction shaft into the | REPLACED | 200822816 11
    Melter gasifier one or more lines with one or more intermediate tanks and optionally one or more pressure-lock devices. The pressure transfer devices may also be provided on the 5 intermediate containers.
    According to one embodiment, at least one intermediate container is provided with a Staubaustragsgasableitung. In this way, can be discharged from such a 10 intermediate container dust by gas is withdrawn from it, which entrains dust. This gas is called Staubaustragsgas in the context of this application.
    According to one embodiment, the device according to the invention comprises two or more prereduction gas supply lines which open into the reduction shaft at different height levels.
    In this way, two or more pre-reducing gases, which are at different pressures from one another-of equal or different composition-can be introduced into the fixed bed in the reduction shaft.
    In the following, the present invention will be explained with reference to a plurality of schematic exemplary figures of Embodiment 25.
    Brief description of the drawings
    FIG. 1 shows an embodiment of a device for carrying out a method according to the invention. FIG. 2 shows a preferred embodiment of a device for carrying out a method according to the invention.
    FIG. 3 shows a further preferred embodiment of an apparatus for carrying out a method according to the invention.
    Figures 4a and 4b show an embodiment of an apparatus for performing a method according to the invention during two working cycles of the method. | REPLACED | 200822816 12
    FIG. 5 shows a further preferred embodiment of a device for carrying out a method according to the invention.
    Description of the embodiments
    FIG. 1 shows an apparatus for carrying out a method according to the invention. This device comprises a reduction shaft 1, a prereduction gas supply line 2 opening into the reduction shaft 1, a top gas outlet 3 emanating from the reduction shaft 1, a melter gasifier 4, a delivery system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4 and one from the reduction shaft 1 outgoing Staubausblasgasableitung 6. In the reduction shaft 1 forms iron oxide-containing material from a fixed bed 7. Pre-reduction gas, which is introduced via the prereduction gas supply line 2 in the fixed bed 7, is under a pressure pl. The prereduction gas converts the iron oxide-containing material into prereduced material. Pre-reduced material is introduced via the introduction system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4. There it is ready-reduced by means of the reduction gas 8 under a pressure p 2 - which is produced in the melter gasifier 1 by gasification of carbon carriers-and melted.
    Vorreduktionsgas consumed after flowing through the fixed bed 7 is discharged from the space above the fixed bed 7 as under the pressure p3 standing top gas from the reduction shaft 1.
    A dust blow-off gas, which is at a pressure p4, is discharged from the fixed-bed 7 out of the reduction shaft 1 via the dust-exhaust gas discharge 6 coming from the reduction shaft 1. The relationship pl> p4 and pl> p3 holds. Also, p4> p2 and p4> p3. It also applies pl> p2.
    | REPLACED 200822816
    13
    In Fig. 2, p2> p4. The prereduced material 9 is brought in one stage - in the intermediate container 10 - under a gas intermediate pressure pZ before it is introduced into the melter gasifier 4. Where pz2p2 applies. FIG. 2 shows the situation when introducing the prereduced material into the melter gasifier 4 through particles falling from the intermediate container 10 into the melter gasifier 4.
    In the case of introduction of prereduced material into the intermediate container 10, not shown, pZ = p4 <p2.
    In FIG. 2, the introduction system for introducing material prereduced in the reduction shaft into the melter gasifier also comprises part of the dust blow-off gas discharge 6.
    Shown are also pressure transfer devices before and after the intermediate container 10 by two horizontal lines in the reduction shaft 1 and melter gasifier 4 connecting line of the delivery system 5. In the situation shown in Figure 2 is the
    Pressure lock device in the reduction shaft 1 and intermediate container 10 connecting line closed, and the pressure-lock device in the intermediate container 10 with the melter gasifier 4 connecting line open.
    FIG. 3 shows a section of the end face of the reduction shaft 1 facing the melter gasifier, a section of the melter gasifier 4, and the introduction system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4. Visible on the reduction shaft 1, the area of the bustle, in which the prereduction gas supply line 2 opens into the reduction shaft 1. Also visible is a screw conveyor, which transports prereduced material from the reduction shaft. The introduction system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4 comprises an intermediate container 11. Also shown is a material cushion made of prereduced material in the intermediate container 11
    I REPLACED 200822816 14
    the upper end of the material cushion and the lower end of the material cushion there is a pressure difference of Apzw. The intermediate container 11 is provided with a Staubaustragsgasableitung 12. About this dust is discharged from the intermediate container 11 by means of a standing under a pressure p5 Staubaustragsgases, represented by a corrugated arrow. Dust-blowing gas, represented by a straight arrow, is withdrawn standing under the pressure p4.
    We have p5 <p4 and p5 <p2, and Apzw is less than or equal to (p2 - p5).
    In principle, an embodiment is possible in which, in contrast to Figure 3, a line from the illustrated group of lines consisting of Staubausblasgasableitung 6 and Staubaustragsgasableitung 12 is not present.
    It may, for example, be that in contrast to FIG. 3, the dust blow-off gas discharge line 6 shown there in the screw conveyor is not present. Then the outgoing from the intermediate container 11 line would also be regarded as Staubausblasgasableitung, because they are indeed derived from the fixed bed a Staubausblasgas with a pressure - which would be referred to as p4 - from the reduction shaft. Then, the dust discharge gas includes the dust blowout gas, and it is p4 = p5.
    Or it may be that a dust discharge for dust discharge at any point within the section of the introduction system 5 between reduction shaft 1 and intermediate container 11 is realized, instead of the Staubaustragsgasleitung 12 shown in Figure 3 and the Staubausblasgasableit 6. Since in this case the executed by this Staubausleitung Gas discharges the dust formed in FIG. 3 by the dust exhaust gas discharge line 6 and the dust discharge gas discharge line 12, and thus replaces these two lines, p4 = p5.
    FIGS. 4a and 4b show how two prereduction gas supply lines are provided in a reduction shaft 1
    | REPLACED I 15 200822616
    2a, 2b at different levels. As a result, for example, two reducing gases with different reduction potential can be introduced, optionally with different pressure.
    Also shown is that the introduction system 5 for introducing pre-reduced in the reduction shaft 1 material in the melter gasifier 4, a line with a plurality of intermediate containers and a plurality
    Pressure Locking devices comprises. The prereduced material is brought under the intermediate gas pressure pZ, which prevails in the last intermediate tank 13 before the melter gasifier 4, by the pre-reduced material successively in several intermediate container 14,15 with
    Pressure transfer devices 16,17 - represented by a pair of horizontal lines - is introduced. Dosing devices are shown with cross-containing circles.
    The introduction system for introducing material prereduced in the reduction shaft into the melter gasifier also comprises part of the dust blow-off gas discharge line 6. Further parts of the dust blow-off gas discharge line 6 originate from the intermediate containers 14 and 15.
    The purpose of the three intermediate tanks 13,14,15 is that in a first cycle (a) - shown in Figure 4a -vorreduziertes material from the top 14 intermediate tank is charged into the intermediate intermediate tank 15, wherein the material and gas flow between the middle intermediate container 15 and the lower intermediate container 13 is closed by the pressure-lock device 17 and dust is sucked out of the middle intermediate container 15 via the outgoing from this Staubausblasgasableitung 6. After switching to cycle (b) - shown in Figure 4b - 15 pre-reduced material is charged from the middle intermediate container into the lower intermediate container 13, wherein the material and gas flow between the upper intermediate container 14 and the middle intermediate container 15 is blocked by the pressure-lock device 16 and dust from the FOLLOWING | 200822816 16
    upper intermediate container 14 is sucked off via the dust exhaust gas outlet 6 emanating therefrom; In addition, the upper intermediate container 14 is filled with prereduced material from the reduction shaft 1.
    Thus, material can continuously be discharged from the reduction shaft 1 and introduced into the melter gasifier 4, wherein dust in this case follows the prereduced material in the melter gasifier or discharged through the Staubausblasgasableitungen 6.
    FIG. 5 schematically shows an embodiment in which the introduction system 5 for introducing material prereduced in the reduction shaft 1 into the melter gasifier 4 has a different construction than in the preceding figures. It comprises a hot conveyor device 18 with conveyor belt for conveying hot pre-reduced material under a protective gas atmosphere between two intermediate containers.
    To put intermediate container under a certain pressure, for example, a gas can be introduced into the intermediate container or gas are withdrawn from the intermediate container. For carrying out such operations necessary piping systems are not shown for clarity in the figures.
    While the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
    REPLACED 17 200822816
    List of Reference Numbers 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    reduction shaft
    Vorreduktionsgaszufuhrleitung
    Topgasableitung
    gasifier
    delivery system
    Staubausblasgasableitungen
    fixed bed
    Reduction gas pre-reduced material
    intermediate container
    intermediate container
    Dust discharge gas discharge
    intermediate container
    intermediate container
    intermediate container
    Smuggling pressure device
    Smuggling pressure device
    Hot transport device
    SUBSEQUENT
    权利要求:
    Claims (15)
    [1]
    200822816 18

    Claims 1. A process for the reduction of iron oxide-containing material, wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and the iron oxide-containing material is converted into prereduced material in the reduction shaft by means of at least one prereduction gas introduced into the fixed bed with a pressure pl, and at least one part this prereduced material, preferably the whole prereduced material, is introduced from the reduction shaft into a melter gasifier, in which it is completely reduced by means of a reducing gas under a pressure p 2, and a top gas having a pressure p 3 from the space above the fixed bed from the reduction shaft is discharged, characterized in that out of the fixed bed, at least one Staubausblasgas is discharged with a pressure p4 from the reduction shaft, and the relationship pl> p4 and pl> p3, preferably also p4> p3 applies.
    [2]
    2. The method according to claim 1, characterized in that at least part of the at least one Staubausblasgases at least during a part of zurückredegierten by the prereduced material in the melter gasifier between the reduction shaft and the melter gasifier way REPLACEMENT 200822816

    19 is passed together with this pre-reduced material in the direction of the melter gasifier.
    [3]
    3. Method according to one of claims 1 or 2, characterized in that the relation p4> p2 holds.
    [4]
    4. The method according to claim 1 or 2, characterized in that the relationship p2> p4 applies, and the prereduced material is brought in one or more stages under a gas intermediate pressure pZ before or while the prereduced material is introduced into the melter gasifier, wherein pZ ^ p2
    [5]
    5. The method according to claim 4, characterized in that the pre-reduced material from the reduction shaft, which is introduced into the EinschmelzVergaser is buffered before introduction into the melter gasifier in an intermediate container, wherein formed in the intermediate container between the upper end of the intermediate storage Material cushion and the lower end of this material cushion there is a pressure difference of ApZw, and wherein a Staubaustragsgas is withdrawn from the intermediate container having a Staubaustragsgas pressure p5, where p5 <p4 and p5 <p2, and where ÄpZM ^ (p2 - p5 ).
    [6]
    6. The method according to claim 5, characterized in that the Staubaustragsgas comprises the Staubausblasgas, and p4 = p5.
    [7]
    7. The method according to any one of claims 4 to 6, characterized in that the prereduced material is brought under the intermediate gas pressure pZ by the pre-reduced material in an intermediate container with pressure transfer devices or successively in several intermediate containers with Nachfach 20: 200822816 4 * · • * * · · F 4 * * * 'pressure transfer devices is introduced.
    [8]
    8. Method according to one of claims 1 to 7, characterized in that pl> p2.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that two or more different from each other pressures Vorreduktionsgase be introduced into the fixed bed, wherein for each two seen in the horizontal direction vertically directly adjacent introduced pre-reduction gases that each introduced deeper Prereduction gas has a higher pressure than the higher prereduction gas introduced.
    [10]
    10. An apparatus for carrying out a method according to one of claims 1 to 9, comprising a reduction shaft, at least one emptying into the reduction shaft prereduction gas supply line, emanating from the reduction shaft top gas discharge, a melter gasifier, a delivery system for introducing pre-reduced in the reduction shaft material in the melter gasifier, a Staubausblasgasableitung emanating from the reduction shaft.
    [11]
    11 .. Apparatus according to claim 10, characterized in that the introduction system for introducing pre-reduced in the reduction shaft material in the melter gasifier also comprises at least a portion of the Staubausblasgasableitung.
    [12]
    12, Apparatus according to claim 10 or 11, characterized in that the introduction system for introducing pre-reduced in the reduction shaft

    Material in the melter gasifier One or more lines with one or more intermediate tanks and optionally one or more pressure-transfer devices includes. 5
    [13]
    13. The apparatus according to claim 12, characterized in that at least one intermediate container is provided with a Staubaustragsgasableitung.
    [14]
    14. The device according to one of claims 10 to 13, characterized in that it comprises two or more in different height levels in the reduction shaft opening prereduction gas supply lines.
    [15]
    15 | REPLACED 200822816 1/6

    Fig. 1



    r

    H

    ^ p3 pl> Ρί &gt; p 2, REPLACEMENT 200822816 2/6



    Fig. 2 © l / i

    p'ZL ^ .f'Z. FOLLOW-UP it * * · 200822816 3/6 Fig. 3

    REPLACEMENT 200822816 4/6 Fig. 4a

    r SUBSCRIPTION 200822816 5/6

    Fig. 4b

    REPLACEMENT 200822816 6/6 * * * w ι Fig. 5

    Claims 1. A process for the reduction of iron oxide-containing material, wherein the iron oxide-containing material forms a fixed bed in a reduction shaft, and the iron oxide-containing material is converted into prereduced material in the reduction shaft by means of at least one prereduction gas introduced into the fixed bed with a pressure p. and at least a portion of this prereduced material, preferably all prereduced material, is introduced from the reduction shaft into a melter gasifier in which it is completely reduced by means of a reducing gas under a pressure p2, and wherein a top gas at a pressure p3 from above the space Fixed bed is discharged from the reduction shaft, characterized in that at least one Staubausblasgas is discharged from the fixed bed with a pressure p4 from the reduction shaft, and the relationship pl> p4 and pl> p3, preferably p4> p3, applies. 2. The method according to claim 1, characterized in that at least part of the at least one Staubausblasgases at least during a part of the vorreduzierten material during insertion into the melter gasifier between reduction shaft and melter gaser zurückzulegenden way 200822816 • · is directed together with this pre-reduced material in the direction of the melter gasifier. 3. Method according to one of claims 1 or 2, characterized in that the relation p4> p2 holds. 4. The method according to claim 1 or 2, characterized in that the relationship p2> p4 applies, and the prereduced material is brought in one or more stages under a gas intermediate pressure pZ before or while the prereduced material is introduced into the melter gasifier, wherein 5. A method according to claim 4, characterized in that the pre-reduced material from the reduction shaft, which is introduced into the melter gasifier, is temporarily stored in an intermediate container prior to introduction into the melter gasifier, wherein in the intermediate container between the upper end of the wherein there is a pressure difference of Apzw at the material cushion formed at the intermediate storage and the lower end of this material cushion, and a dust discharge gas having a dust discharge gas pressure p5 is withdrawn from the intermediate container, where p5 <p4 and p5 <p2, and where Apzw £ {p2 - p5). A method according to claim 5, characterized in that the deaerating gas comprises the dust from bl ajjjgifs, andjarg = p5. A method according to any one of claims 4 to 6, characterized in that the pre-reduced material is brought under the intermediate gas pressure pZ by placing the pre-reduced material in an intermediate container with pressure transfer devices or successively in several intermediate containers with | REPLACED | 200822816 4 · Pressure transfer devices are introduced. 6

    Method according to one of Claims 1 to jT, characterized in that pl> p2. 1 method according to any one of claims 1 to characterized in that two or more different from each other pressures prereduction gases are introduced into the fixed bed, wherein for each two seen in the horizontal direction vertically adjacent directly introduced pre-reduction gases, that the deeper introduced prereduction gas has a higher Pressure has as the higher introduced prereduction gas, ys. Apparatus for carrying out a method according to one of claims 1 to 1, comprising a reduction shaft, at least one pre-reduction gas supply line opening into the reduction shaft, a top gas outlet emerging from the reduction shaft, a melter gasifier, a delivery system for introducing material prereduced in the reduction shaft into the melter gasifier from the reduction shaft outgoing Staubausblasgasableitung. 3 Apparatus according to claim y, characterized in that the introduction system for introducing pre-reduced in the reduction shaft material in the melter gasifier also comprises at least a portion of the Staubausblasgasableitung. Device according to claim Y * or characterized in that the introduction system for the introduction of ΝΔΠΗΓϊΡηΡΊΓΜ-ΙΤ I pre-reduced in the reduction shaft I 5 200822816 ♦ * «· · · 10 15 At h-

    Material in the melter gasifier one or more lines with one or more intermediate containers and optionally one or more pressure-lock devices comprises. ) * ·

    ΑΛ Device according to claim V characterized in that at least one intermediate container is provided with a Staubaustragsgasableitung. 3 A t- device according to any one of claims ^ 0 to V-characterized in that it comprises two or more opening in different height levels in the reduction shaft prereduction gas supply lines. REPLACED |
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    同族专利:
    公开号 | 公开日
    US9428818B2|2016-08-30|
    WO2013045260A2|2013-04-04|
    CN103842525A|2014-06-04|
    AT512017B1|2014-02-15|
    EP2761036A2|2014-08-06|
    WO2013045260A3|2013-06-27|
    CA2850393A1|2013-04-04|
    AU2012314727A1|2014-04-24|
    BR112014007560A2|2017-04-04|
    KR20140090174A|2014-07-16|
    UA113064C2|2016-12-12|
    US20140224068A1|2014-08-14|
    RU2014117375A|2015-11-10|
    RU2606135C2|2017-01-10|
    CN103842525B|2015-11-25|
    ZA201402204B|2015-03-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1998015661A1|1996-10-08|1998-04-16|Voest-Alpine Industrieanlagenbau Gmbh|Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method|
    JP2000171173A|1998-12-09|2000-06-23|Kawasaki Steel Corp|Adhering dust thickness detector of metal refining furnace and method for removing adhering dust|
    EP1013778A1|1998-12-22|2000-06-28|Der Grüne Punkt-Duales System Deutschland Aktiengesellschaft|Method and apparatus for producing metal from metal ores|
    US4235425A|1979-07-16|1980-11-25|Midrex Corporation|Impact bed gasifier-melter|
    US4358310A|1981-02-18|1982-11-09|Midrex Corporation|Dry collection of metallized fines|
    DE4240197C2|1992-11-30|1996-04-18|Vuletic Bogdan Dipl Ing|Process for the production of pig iron from iron ore and device for the thermal and / or chemical treatment of a readily disintegrating material or for the production of pig iron by means of this process|
    US5435831A|1994-08-12|1995-07-25|Midrex International B.V. Rotterdam, Zurich Branch|Circulating fluidizable bed co-processing of fines in a direct reduction system|
    AT406482B|1995-07-19|2000-05-25|Voest Alpine Ind Anlagen|METHOD FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS AND SYSTEM FOR IMPLEMENTING THE METHOD|
    DE19623246C1|1996-05-30|1997-10-02|Voest Alpine Ind Anlagen|Loading of melting gasifier with gasifying agents and sponge iron@|
    AT405525B|1996-06-28|1999-09-27|Voest Alpine Ind Anlagen|METHOD AND INSTALLATION FOR THE PRODUCTION OF LIQUID PIPE IRON OR LIQUID STEEL PRE-PRODUCTS|
    US6224649B1|1998-07-06|2001-05-01|Hylsa, S.A. De C.V.|Method and apparatus for reducing iron-oxides-particles having a broad range of sizes|
    AT409387B|2000-06-28|2002-07-25|Voest Alpine Ind Anlagen|Process and installation for the gas reduction of particulate oxide-containing ores|
    KR100568352B1|2001-12-21|2006-04-05|주식회사 포스코|Ironmaking process with briquetting facility using fine iron and sludge|EA201600321A1|2015-03-13|2016-10-31|Сулейман Мустафьевич ТЛЕУГАБУЛОВ|METHOD OF RESTORING MELTING STEEL AND DEVICE FOR ITS IMPLEMENTATION|
    EP3150729A1|2015-10-02|2017-04-05|Primetals Technologies Austria GmbH|Method and device for feeding iron carrier material|
    EP3255157A1|2016-06-09|2017-12-13|Primetals Technologies Austria GmbH|Method for direct reduction with dry vent gas dust removal|
    法律状态:
    2016-06-15| PC| Change of the owner|Owner name: PRIMETALS TECHNOLOGIES AUSTRIA GMBH, AT Effective date: 20160415 |
    2018-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20170930 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1421/2011A|AT512017B1|2011-09-30|2011-09-30|METHOD AND DEVICE FOR ROLLING PRODUCTION|ATA1421/2011A| AT512017B1|2011-09-30|2011-09-30|METHOD AND DEVICE FOR ROLLING PRODUCTION|
    CA2850393A| CA2850393A1|2011-09-30|2012-09-10|Method and device for producing pig iron|
    RU2014117375A| RU2606135C2|2011-09-30|2012-09-10|Method and device for iron smelting|
    UAA201403168A| UA113064C2|2011-09-30|2012-09-10|METHOD AND DEVICE FOR MAKING IRON|
    US14/348,290| US9428818B2|2011-09-30|2012-09-10|Method and device for producing pig iron|
    KR1020147011897A| KR20140090174A|2011-09-30|2012-09-10|Method and device for producing pig iron|
    CN201280047574.3A| CN103842525B|2011-09-30|2012-09-10|Raw ferriferous method and apparatus|
    BR112014007560A| BR112014007560A2|2011-09-30|2012-09-10|method of reducing iron oxide-containing material and device for carrying out a method|
    AU2012314727A| AU2012314727A1|2011-09-30|2012-09-10|Method and device for producing pig iron|
    EP12761570.6A| EP2761036A2|2011-09-30|2012-09-10|Method and device for producing pig iron|
    PCT/EP2012/067610| WO2013045260A2|2011-09-30|2012-09-10|Method and device for producing pig iron|
    ZA2014/02204A| ZA201402204B|2011-09-30|2014-03-25|Method and device for producing pig iron|
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