• 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:
    This invention relates to a method of oxidizing and sintering ore beads 1 arranged in a space 2 where the oxidation and sintering takes place by means of a medium with a fixed temperature which heats the ore beads 1. The method comprises introducing a first medium 3in into the space via an inlet 4 connected to the space 1 and heating the medium in the opening by using a combustion device 5, or part thereof, arranged in the opening 4 and comprising fuel where the use of the combustion device 5 includes ignition of the fuel, combustion of the fuel whereby combustion heat is generated and transfer of the combustion heat to the first combustion heat. The method is characterized by arranging the combustion device 5, or part thereof, in an area A in the inlet 4 which in turn is arranged outside the direct passage of the first medium in and through the inlet 4 so that the ignition of the fuel, the combustion of the fuel and the transfer the combustion heat to the first medium 3 takes place in this area A and the introduction of a second medium 6 into the area A in the immediate vicinity of the combustion device 5, or part thereof, ignition of the fuel, combustion of the fuel and transfer of combustion heat also to the second medium 6 followed of further transport of the heated first medium 3 and the heated second medium 6 through the inlet 4 and into the space 2. The invention also relates to a device 9 and a ball interaction 13. (see Fig. 1.) W: Other_Casedocuments Patent P410- P41001613SEOO P41001613SEO0 Grundhandling.doc
    公开号:SE1051112A1
    申请号:SE1051112
    申请日:2010-10-26
    公开日:2012-04-27
    发明作者:Christian Fredriksson；Stefan Savonen
    申请人:Luossavaara Kiirunavaara Ab；
    IPC主号:
    专利说明:

    Disclosure of the Invention An object of this invention is to provide a method, a device and a ball interaction which ensures the obtaining of a low Nox content during oxidation and sintering of ore balls arranged in a space while at the same time reducing energy consumption.
    This is obtained by a method with the technical features reported in claim 1, a device with the technical features reported in claim 9 and a ball interaction according to claim 21.
    Preferred embodiments of the invention will be described below with reference to the figures.
    Brief description of the drawings Fig. 1 shows a device according to the invention.
    Fig. 2 shows a section through the device in Fig. 1.
    Fig. 3 shows another embodiment of a device according to the invention.
    Fig. 4 shows yet another embodiment of a device according to the invention.
    Fig. 5 also shows yet another embodiment of a device according to the invention.
    Fig. 6 shows a part of the combustion device.
    Fig. 7 shows a ball interaction according to the invention.
    Detailed Description of Exemplary Embodiments A method and apparatus according to this invention which will be described below will have the same function and meaning regardless of whether it is a ball interaction with ore balls or whether it is a more general sintering where not formed into ore balls but where oxidized and sintered without first being formed. In the description below, the word ball interaction must be interpreted in its broadest sense, which means that a sinten / erk is also meant.
    The word ore balls should also be interpreted in its broadest sense so that the random lump in a sintering plant is also referred to as the word ore balls.
    This invention relates to a process for obtaining a low Nox content in the oxidation and sintering of ore beads 1 arranged in a space 2 where the sintering takes place by means of a fixed temperature medium which heats the ore beads 1.
    The method comprises introducing a first medium 3 into the space 2 via an inlet 4 connected to the space 2 and heating the first medium 3 in the inlet 4 by W: Other_Casedocum ents Patent P410- P41001613SE00 P41001613SE00 Basic document .doc 10 15 Use of a combustion device 5, or part thereof, arranged in the inlet 4 and comprising fuel. The use of the combustion device 5 comprises ignition of the fuel, combustion of the fuel whereby heat of combustion develops and transfer of the heat of combustion to the first medium 3 located at the combustion device 5.
    The method further comprises arranging the combustion device 5, or part thereof, in an area A in the inlet 4 which in turn is arranged outside the direct passage of the first medium in and through the inlet 4 so that the ignition of the fuel, the combustion of the fuel and the transfer of the combustion heat to the first medium 3 takes place in this area A.
    The method also comprises introducing a second medium 6 into the area A in direct proximity to the combustion device 5, or part thereof, where the ignition of the fuel, the combustion of the fuel and the transfer of the heat of combustion also to the second medium 6. Then follows transport of the heated the first medium 3 and the heated second medium 6 through the inlet 4 and into the space 2. See Figs. 1 and 2.
    A mixing of the heated first medium 3 and the heated second medium 6 takes place before or during the introduction of the two media 3 and 6 into the space 2 to oxidize and sinter the ore balls 1 which are located in the space 2. See Figs. 1 and 2 .
    The fact that the combustion device 5, or at least a part thereof, is arranged in the relatively undisturbed area A in the inlet 4 but outside the first passage of the first medium in the inlet means that the ignition and combustion of the fuel takes place in a space which is not directly affected, disturbed, by the medium, the first medium 3, which passes in the inlet 4 on its way to the space 1 where the ore balls 2 are located.
    Combining this to arrange the combustion device 5 in an area A which is not in the direct passage of the first medium with introducing two mediums 3 and 6 at different places in the inlet 4 together gives a result of ensuring a low Nox content during oxidation and sintering of ore balls arranging in a space.
    When the combustion device 5 is arranged outside the direct passage of the first medium in the inlet 4, the combustion of the fuel takes place with a smaller amount of air than has been used previously. The temperature of the first medium becomes slightly lower than before when the combustion device was placed directly in the inlet 4 and in the direct passage path of the medium.
    This results in a lower flame temperature.
    W: Other_Casedocuments Patent P410- P41001613EN00 P41001613EN00 Grundhandling.doc 10 15 20 25 30 35 P41001613EN00 4 Introduction of the two media 3 and 6 into the inlet 4, one of which, the first medium 3, directly into the inlet 4 and the second medium 6 in direct proximity to the combustion device 5 provides the possibility to increase the temperature of the second medium 6 and control the parameters inside the space 2, among other things in terms of heat and heat transfer. The supply of the second medium 6 makes it possible to optimize the prevailing combustion conditions with respect to low NOX content.
    Using a cold medium gives the best NOx reduction but requires a lot of energy during the heating of the medium which takes place with the help of the combustion device. It simply consumes a lot of fuel. Therefore, it is more cost-effective to preheat the first medium 3 before it is introduced into the inlet 4 and / or preheat the second medium 6 before it is introduced in the vicinity of the combustion device 5 in the inlet 4.
    The first medium 3 and the second medium 6 are suitably preheated to different temperatures T1 and T2 where the first medium 3 is heated to a temperature T1 which is higher than the temperature T2 of the second medium. The temperature T1 of the first medium should be in the range 500-1500 ° C. See Fig. 2.
    Adding two media with different temperatures in this way ensures that the medium which is finally in the space 1 and which constitutes a mixture of the first medium 3 heated by the combustion device 5 and the heated second medium 6 obtains a desired temperature with a reasonable oxygen content, at the same time as the NOx content and energy supply can be reduced.
    The method according to this invention comprises the use of a cooling medium 7 for cooling the hot sintered ore balls 1 after the oxidation and the sintering followed by the use of the heated cooling medium 7 as the preheated first medium 3 and / or the preheated second medium 6. See Fig. 3- 5. another part of By reusing a medium that has received heat in the ore ball manufacturing process, by supplying this heated medium into a heating step in another part of the ore ball manufacturing process where a heated medium is needed, the energy supplied to the medium is retained in the process and reused so that the supply of additional energy to heat the medium that is to be hot to function in the process can be reduced. This results in a cost-effective manufacturing process that can still offer low levels of NOx.
    The method comprises dividing the cooling medium 7 into the preheated first medium 3 and the preheated second medium 6 after cooling the hot sintered ore beads 1. ../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../ .. .
    As an alternative to this, the method may comprise the use of two cooling mediums 7.1 and 7.2 which, after cooling the ore balls 1, are used as the preheated first medium 3 and the preheated second medium 6.
    A further alternative is that the method comprises using a coolant 7 and dividing the coolant 7 into a first coolant fraction 7.3 and a second coolant fraction 7.4 before cooling the hot sintered ore balls 1 where the first coolant fraction 7.3 and the second coolant fraction 7.4 after cooling the ore balls 1 is used as the preheated first medium 3 and the second medium 6.
    The method of heating the refrigerant 7 and thereby simultaneously preheating the medium used for heating the ore balls 1 in the space 2 in an earlier step in the manufacturing process comprises heating the refrigerant, the refrigerants, the refrigerant fractions, 7 and 7.1-7.4 to two different temperatures T1 and T2 which results in a preheated first medium 3 and a preheated second medium 6 with different temperatures T1 and T2.
    The method further comprises using the refrigerant, the refrigerants, the refrigerant fractions, 7 and 7.1-7.4 for cooling ore balls 1 which are located in at least two different zones 8.1 and 8.2 after exiting from the space where the ore balls 1 in respective zones 8.1 and 8.2 have different temperatures T1 and T2 resulting in heating of the refrigerant, the refrigerants, the refrigerant fractions, 7 and 7.1-7.4 to different temperatures T1 and T2 and thereby obtaining different temperatures T1 and T2 on the preheated first medium 3 and the preheated second medium 6.
    The two different zones 8.1 and 8.2 follow each other so the ore balls 1 which are in a first zone 8.1 come directly from the space 2 and are hotter than the ore balls 1 which are in a second zone 8.2 which come after the first zone 8.1 because the ore balls 1 in the first zone 8.1 are cooled by means of the coolant 7 passing through the first zone 8.1 and then transported into the second zone 8.2 at a lower temperature than in the first zone 8.1 for further cooling of the second zone 8.2.
    During this process, it is convenient to use air as media 3, 6 and 7.
    This invention also relates to a device 9 which is intended for use in the oxidation and sintering of ore beads 1. This device 9 makes it possible to carry out the procedure described above.
    This device 9 comprises a space 2 in which the ore balls 1 are arranged and in which a medium of a certain temperature is introduced for transferring heat to the ore balls 1.
    The device 9 comprises an inlet 4 connected to the space 2 for introducing a first medium 3 via the inlet 4 and into the space 2 and there heating of the first medium 3.
    A combustion device 5, or part thereof, is arranged in the inlet 4 for heating the first medium 3 in the inlet 4. The combustion device 5 comprises fuel which, when using the device 9, is ignited and combusted, whereby combustion heat is developed and transferred to the first medium 3. located at the combustion device 5. The inlet 4 comprises an area A arranged outside the direct passage of the medium in and through the inlet 4, in which the combustion device 5, or a part thereof, is arranged so that the ignition of the fuel, the fuel and the combustion of the transfer of combustion heat to the first medium 3 takes place in this area A.
    An inlet 10 is arranged in connection with the inlet 4 for introducing a second medium 6 in direct proximity to the combustion device 5, or part thereof, in the area A where the ignition of the fuel and the combustion takes place and where the combustion heat is also transferred to the second medium 6. The inlet 4 further enables transport of the heated first medium 3 and the heated second medium 6 through the inlet 4 and into the space 2. The two heated media are mixed before or at the introduction into the space 2. The inlet 4 comprises an extension part 4.1 which constitutes one from the inlet 4 protruding part whose interior offers area A.
    The combustion device 5, or at least a part thereof, is arranged on the innermost side 4.1a of the extension part substantially opposite the inlet connection with the space 2. See Fig. 6. The inlet 10 for the second medium 6 is also arranged on the innermost side 4.1a of the extension part substantially opposite the inlet connection with the space 1. The inlet 10 is arranged in the vicinity of the combustion device 5 so that the transport direction of the second medium coincides with the direction of the combustion flame into the extension part 4.1 of the inlet. See Fig. 6.
    W: Other_Cased0Cuments Patent P410- P41001613SE00 P41001613SE00 Basic document.doc 10 15 20 25 30 35 P41001613SEO0 The combustion device 5 comprises a structural part 5.1 which in turn comprises a nozzle 5.2 through which the fuel in the combustion device 5 is discharged.
    The combustion device 5 may also comprise an ignition device 5.3 which ignites the fuel. Usually this is not necessary for the fuel to ignite due to the already existing high temperature in the construction part 5.1 inlet 4. constitutes the part of the combustion device 5 which is arranged in the inlet 4, in the area A. See Fig. 6.
    The device 9 comprises a preheating device 11 which heats the first medium 3 before it is introduced into the inlet 4, and the second medium 6 before it is introduced into the inlet 4, the area A, it and T2.
    The preheating device 12 is to preheat the first medium 3 to a higher temperature T1 than the first medium 3 and the second medium 6 to different temperatures T1 the second medium 6. The first medium 3 is to be preheated to a temperature T1 in the range 500-1500 ° C.
    The preheating device 11 comprises at least one zone 8.1 or 8.2 through which sintered ore balls 1 pass after they have left the space 1 and where zone 8.1 or 8.2 is supplied with a cooling medium 7 or 7.1-7.4) for cooling the ore balls 1 and where the cooling medium 7 or 7.1-7.4 ) is thereby heated by the ore balls 1 and then used as the preheated first medium 3 and the preheated second medium 6.
    It is suitable that the preheating device 11 comprises at least two zones 8.1 and 8.2 and where each of the zones is supplied with a cooling medium 7 or 7.1-7.4 for cooling the ore balls 1 in the respective zones 8.1 and 8.2 and where the respective cooling medium 7 or 7.1-7.4 is thereby heated. of the ore balls 1 in respective zones 8.1 and 8.2 and then used as the preheated first medium 3 and the preheated second medium 6.
    Zones 8.1 and 8.2 are arranged one after the other. The ore balls 1 in a first zone 8.1 are hotter than the ore balls 1 in a second zone 8.2. Each of the zones 8.1 and 8.2 is supplied with a cooling medium 7 or 7.1-7.4 for cooling the ore balls 1 and where the respective cooling medium 7 or 7.1-7.4 is heated by the ore balls 1 to two different temperatures T1 and T2 and then used as the preheated first medium. 3 and the preheated second medium 6. The first zone 8.1 is arranged directly after the space 2.
    The invention also relates to a ball interaction 12 comprising at least one device 9 as described above. A complete ball interaction requires a number of devices 9 comprising inlets 4 and combustion devices 5 arranged one after the other along the ore balls W: Other_Casedocuments Patent P410- P41001613SEO0 P41001613SEO0 Gru nd handling.doc 10 happens. At the same time, the preheating device 11 constitutes a cooling device where the ore balls 1 are cooled after the oxidation and sintering in the space 1. See Fig. 7.
    The ball mill 12 is of the belt grate plant type, "straight grate plant", and comprises a long conveyor belt 13 on which the ore balls 1 are transported through the whole ball mill 12, a drying device 14 where the ore balls 1 are dried and optionally preheated, an oxidation and sintering part 15 comprising the space 2 and the subsequent cooling device / preheating device 11.
    This description of various embodiments of the invention and alternative detailed constructions and methods should not be construed as limiting the invention but should be construed in its broadest sense so as not to unnecessarily limit the scope of protection according to the appended claims herein. Changes that are within the knowledge of a person skilled in the art are within the scope of the inventive concept. The various detailed constructions mentioned in the description above can be used and combined freely as long as the desired function is obtained.
    W: Other_Casedocuments Patent P410- P41001613SE00 P41001613S E00 Grundhandling.doc
    权利要求:
    Claims (1)
    [1]
    A method of oxidizing and sintering ore beads (1) arranged in a space (2) where the oxidation and sintering takes place by means of a fixed temperature medium which heats the ore beads (1) comprising introducing a first medium (3) into the space via an inlet (4) connected to the space (1) and heating the medium in the inlet by using a combustion device (5), or part thereof, arranged in the inlet (4) and comprising fuel where the use of the combustion device (5) comprises ignition of the fuel, combustion of the fuel whereby heat of combustion develops and transfer of the heat of combustion to the first medium (3) located at the combustion device (5) characterized by arranging the combustion device (5), therefrom, in an area (A) in the inlet (4) which in turn is arranged outside the direct passage of the first medium in and through the inlet (4) so that the ignition of fuel the combustion of the fuel and the transfer of the heat of combustion to the first medium (3) takes place in this area (A) and the introduction of a second medium (6) into the area (A) in direct proximity to the combustion device (5), or part where where ignition of the fuel, combustion of the fuel and transfer of combustion heat also to the second medium (6) followed by further transport of the heated first medium (3) and the heated second medium (6) through the inlet (4) and into the space (2). A method according to claim 1, comprising preheating the first medium (3) before it is introduced into the inlet (4) and / or preheating the second medium (6) before it is introduced in the vicinity of the combustion device (5) in the inlet (5). A method according to claim 2 comprising preheating the first medium (3) and the second medium (6) to different temperatures (T1, T2). A method according to claim 3, comprising preheating the first medium (3) to a temperature (T1) higher than the temperature (T2) of the second medium. A method according to any one of claims 2-4 comprising preheating the first medium (3) to a temperature (T1) in the range 500-1500 ° C. Method according to any one of claims 1-5, comprising the use of a cooling medium (7) for cooling hot sintered ore beads (1) after the oxidation and sintering followed by W: Other_Casedocuments Patent P410- P41001613SE00 P41001613SE00 Basic Document 10 15 20 25 30 P41001613EN00 10. use of the heated refrigerant (7) as the preheated first medium (3) and / or the preheated second medium (6). Method according to claim 6, comprising using the cooling medium (7) for cooling ore balls (1) located in at least two different zones (8.1, 8.2) where the ore balls (1) in the respective zone (8.1, 8.2) have different temperatures (T1, T2) which results in heating of the coolant (7) to different temperatures (T1, T2) depending on which zone (8.1, 8.2) has been passed and thus obtaining different temperatures (T1, T2) on the preheated first medium (3) and the preheated second medium (6). A method according to any one of claims 1-7 comprising using air as a medium (3, 6, 7). Device (9) for oxidizing and sintering ore beads (1) comprising a space (2) in which the ore beads (1) are arranged and in which a medium with a certain temperature is introduced for transferring heat to the ore beads (1), an inlet (4 ) connected to the space (2) for introducing a first medium (3) via the inlet (4) and into the space (2) and where heating of the first medium (3) takes place and a combustion device (5), or part thereof of , arranged in the inlet (4) for heating the first medium (3) in the inlet (4) where the combustion device (5) comprises fuel which, when using the device (10), ignites and burns, whereby combustion heat is developed and transferred to the first medium. (3) located at the combustion device (5) characterized by the inlet (4) comprises an area (A) arranged outside the direct passage of the medium in and through the inlet (4), in which the combustion device (5), or a part thereof, is arranged so that the ignition of the fuel, forb the purification of the fuel and the transfer of the heat of combustion to the first medium (3) takes place in this area (A), that an inlet (10) is arranged in connection with the inlet (4) for introduction of a second medium (6) in direct proximity to the combustion device (5), or part thereof, in the area (A) where the ignition of the fuel and the combustion takes place and where the heat of combustion is also transferred to the second medium (6) and that the inlet (4) enables further transport of the heated first medium (3 ) and the heated second medium (6) through the inlet (4) and into the space (2). Device (9) according to claim 9, wherein the inlet (4) comprises an extension part (4.1) which constitutes a part projecting from the inlet (4) whose interior offers the area (A). W: Other_Casedocuments Patent P410- P41001613SE00 P41001613SE00 Basic document .doc 10 15 20 25 30 35 P41001613SEOO 11. 12. 13. 14. 15. 16. 17. 18. 19. 11 Device (9) according to claim 10 where the combustion device (5), or at least a part thereof, is arranged on the innermost side (4.1a) of the extension part substantially opposite the connection of the inlet to the space (1). Device (9) according to claim 10 or 11, wherein the inlet (10) is arranged on the innermost side (4.1a) of the extension part, substantially opposite the connection of the inlet to the space (1). Device (9) according to any one of claims 9-12, comprising a preheating device (12) which heats the first medium (3) before it is introduced into the inlet, and / or the second medium (6) before it is introduced into the inlet (4), the area (A). Device (9) according to claim 13, wherein the preheating device (12) preheats the first medium (3) and the second medium (6) to different temperatures (T1, T2). Device (9) according to claim 14, wherein the preheating device (12) preheats the first medium (3) to a higher temperature (T1) than the second medium (6). Device (9) according to claim 15, wherein the preheating device (12) preheats the first medium (3) to a temperature (T1) in the range 500-1500 ° C. Device (9) according to any one of claims 13-16, wherein the preheating device (12) comprises at least one zone (8.1, 8.2) through which sintered ore balls (1) pass and where the zone (8.1, 8.2) is supplied with a cooling medium (7, 7.1-7.4). ) for cooling the ore balls (1) and where the cooling medium (7, 7.1-7.4) is thereby heated by the ore balls (1) and then used as the preheated first medium (3) and the preheated second medium (6). Device (9) according to claim 17, wherein the preheating device (12) comprises at least two zones (8.1, 8.2) and wherein each of the zones (8.1, 8.2) is supplied with a cooling medium (7, 7.1-7.4) for cooling the ore balls (1). in the respective zone (8.1, 8.2) and where the respective cooling medium (7, 7.1-7.4) is thereby heated by the ore balls (1) in the respective zone (8.1, 8.2) and then used as the preheated first medium (3) and the preheated second the medium (6). Device (9) according to claim 18, wherein the zones (8.1, 8.2) are arranged one after the other and wherein the ore balls (1) in a first zone (8,1) are hotter than the ore balls (1) in a second zone (8.2) and where and one of the zones (8.1, 8.2) is supplied with a cooling medium (7, 7.1-7.4) W: Other_Casedocuments Patent P410- P41001613SEO0 P41001613SE00 cooling medium (7, 7.1-7.4) is heated by the ore balls (1) to two different temperatures (T1, T2) and then used as the preheated first medium (3) and the preheated second medium (6). Device (9) according to claim 19, wherein the first zone (8.1) is arranged directly after the space (2). Ball interaction (13) comprising a device (9) according to any one of claims 9-20. Ball mill (13) according to claim 21 of the strip kiln type, comprising a conveyor belt (14) on which the ore balls (1) are transported through the ball mill (13), a drying device (15) where the ore balls (1) are dried and optionally preheated, an oxidizing medium. and sintering part (16) comprising the space (2) and a subsequent cooling device / preheating device (12). W: Other_Casedocuments Patent P410- P41001613SE00 P41001613SEO0 Grundhandling.doc
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    同族专利:
    公开号 | 公开日
    WO2012057687A1|2012-05-03|
    US20130220075A1|2013-08-29|
    US9011571B2|2015-04-21|
    SE535238C2|2012-06-05|
    CA2815617C|2018-12-11|
    BR112013010315A2|2016-09-20|
    CA2815617A1|2012-05-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB746841A|1953-03-10|1956-03-21|Marvin J Udy|Improvements in iron recovery|
    US3782888A|1972-10-04|1974-01-01|Allis Chalmers|Method and apparatus for heat treating with heat recuperation from material cooling and auxiliary heat during startup|
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    JP5357551B2|2009-01-15|2013-12-04|株式会社神戸製鋼所|Method for producing iron ore pellets|DE102015107360A1|2015-05-11|2016-11-17|OutotecOy|Low NOx combustion system for traveling grate pelleting plants|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051112A|SE535238C2|2010-10-26|2010-10-26|Procedure, apparatus and ball interfaces|SE1051112A| SE535238C2|2010-10-26|2010-10-26|Procedure, apparatus and ball interfaces|
    BR112013010315A| BR112013010315A2|2010-10-26|2011-10-26|method and arrangement for pellet oxidation and sintering and pelletizing plant|
    US13/881,697| US9011571B2|2010-10-26|2011-10-26|Method, arrangement and pelletising plant|
    PCT/SE2011/051275| WO2012057687A1|2010-10-26|2011-10-26|Method, arrangement and pelletising plant|
    CA2815617A| CA2815617C|2010-10-26|2011-10-26|Method, arrangement and pelletising plant|
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