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EP1974066B1 - Une machine de frittage - Google Patents

Une machine de frittage Download PDF

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Publication number
EP1974066B1
EP1974066B1 EP07702736.5A EP07702736A EP1974066B1 EP 1974066 B1 EP1974066 B1 EP 1974066B1 EP 07702736 A EP07702736 A EP 07702736A EP 1974066 B1 EP1974066 B1 EP 1974066B1
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EP
European Patent Office
Prior art keywords
sintering
gas
section
belt
sintering belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07702736.5A
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German (de)
English (en)
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EP1974066A1 (fr
Inventor
Karl Laaber
Oskar Pammer
Hans-Herbert Stiasny
Anton Sebanz
Karl Zehetbauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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Application filed by Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to PL07702736T priority Critical patent/PL1974066T3/pl
Publication of EP1974066A1 publication Critical patent/EP1974066A1/fr
Application granted granted Critical
Publication of EP1974066B1 publication Critical patent/EP1974066B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines

Definitions

  • the invention relates to a method and a plant for sintering metal-containing materials such as iron ores or manganese ores, in particular oxidic or carbonate ores, on a sintering machine with sintered exhaust gas recirculation.
  • metal-containing materials such as iron ores or manganese ores, in particular oxidic or carbonate ores
  • the sintering of metal-containing materials such as iron ores or manganese ores, in particular oxidic or carbonate ores, by means of sintering machines.
  • the sintering mixture which consists of the metal-containing material, return material, solid fuel, aggregates, etc.
  • the sintered mixture is ignited in an ignition furnace on its surface.
  • oxygen-containing gases are passed as process gas through the sintering mixture, whereby the sintering front migrates from the surface of the sintering mixture in the direction of the sintering belt surface.
  • the gases used as process gas are, for example, fresh air, exhaust air from a sintering cooler, air used for predrying the sintering mixture, a mixture of several of these gases, or a mixture of one or more of these gases with technical oxygen.
  • the sintering belt is moved from the loading point in the direction of the discharge point. During transport on the sintering belt, the entire sintered mixture is sintered through and leaves the sintering belt as a hot finished sinter at the discharge point. The hot finished sinter is cooled in a subsequent sinter cooler.
  • Sintering machines can be designed, for example, as traveling grate sintering machines, in which the process gas is sucked through the sintering mixture by applying a negative pressure to the suction boxes below the sintering belt by means of blowers.
  • the temperature and oxygen content of the resulting sintering waste gas change in normal operation.
  • the temperature of the sintered exhaust gas increases along the sintering belt.
  • the oxygen content of the sintered exhaust gas initially decreases along the sintering belt, in order to increase again after reaching a minimum.
  • the temperature of the sintering exhaust gas in the front first section of the sintering belt is below 100 ° C. and rises to over 300 ° C. up to the rear section.
  • the sintered exhaust gas contains, inter alia, evaporated water from the sintering mixture, CO 2 and CO from the sometimes incomplete combustion of the fuel and calcination operations, further from the combustion of sulfur or sulfur contained in the fuel or ore sulfur oxides SO x , and nitrogen oxides NO x , dioxins, furans, dust.
  • the removal of pollutants is necessary to minimize the environmental impact.
  • a reduction in the amount of exhaust gas to be removed from a sintering machine or the pollutant load contained in the exhaust gas facilitates the exhaust gas purification.
  • JP-53-004706 a partial recycling of the sintering exhaust gases to the sintering mixture, wherein the cold sintering exhaust gas is passed from the front first portion of the sintering belt to the hot sintering exhaust gas from the rear third section before combining both gases.
  • the transport path which has to cover the cold sintering exhaust gas until it merges with the hot sintered exhaust gas, is very long.
  • the acids formed from the nitrogen oxides NO x , sulfur oxides SO x and water vapor contained in the sintering offgases due to the falling below the acid dew points occur.
  • the condensing acids are highly corrosive.
  • JP-08-100222 a combination of sintered exhaust gases from a front and a rear portion to a mixed gas and a return of the resulting mixed gas to a central portion of the sintering belt.
  • the sintered exhaust gases from the front and the rear section are transported by blowers to the place of their mixing. Therefore, a blower is provided in the piping for the sintering exhaust gas from the front portion and in the piping for the sintering exhaust gas from the rear portion, respectively.
  • a blower in the lead for the Cool sintered exhaust gas from the front section is subject to severe corrosion problems.
  • a blower for the hot sintered exhaust gas from the rear section is exposed to the risk of overheating.
  • EP861908 discloses sintering methods and apparatus in which process gas is applied at a specific pressure and mass flow rate to a central region of the sintering belt to increase the sintering speed after obtaining a sintered layer of a given thickness.
  • Fig. 4 of EP861908 For example, a sintering plant is shown in which sintered exhaust gas is introduced from a central portion of the sintering belt into a stream of combined sintered exhaust gases from the front and rear portions of the sintering belt. After that, the mixture obtained from the sintered exhaust gases of all sections of the sintering belt can be branched off and applied to the middle region of the sintering belt.
  • EP861908 is not the avoidance of corrosion problems as a task.
  • This object is achieved in that the hot sintered exhaust gas from the third section, which causes no corrosion problems in normal operation, if possible is brought close to the first section before it is combined with the sintered exhaust gas from the first section.
  • the present invention therefore relates to a device for sintering metal-containing materials such as iron ores or manganese ores, in particular oxidic or carbonic ores, on a sintering machine with a feed device (1) for a sintered mixture (2) containing a solid fuel onto a sintering belt (3).
  • a method for operating such a device is a method for sintering metal-containing materials such as iron ores or manganese ores, in particular oxidic or carbonic ores, on a sintering machine, in the oxygen-containing process gas in three successive sections of the sintering belt, of which the first on one side connects to the feed zone and the third ends at the discharge end of the sintering belt, is passed through the sintering mixture, and in each of the sections accumulating sintered waste gas is collected and discharged separately in suction boxes, and the sintered exhaust gas from the first section and the sintered exhaust gas from the third section are supplied as the process gas to the second section, and the sintering exhaust gas from the second section is exhausted from the sintering machine as exhaust gas and the hot finished sinter is cooled after being discharged from the sintering belt, characterized in that the sintered exhaust gas from the third section is transported to the sintered exhaust gas from the first section and combined into a mixed gas in a mixing zone, the transport path of
  • the length of the sintering belt is divided into three consecutive sections.
  • the first section begins, viewed in the transport direction of the sintering mixture, subsequently to the application zone, the third section ends at the discharge end of the sintering belt.
  • the second section is bounded by the first and third sections.
  • the division of the sections is carried out so that the exhaust gas amount of the sintering machine is minimized and the process gas for the second section in normal operation, optionally after the addition of exhaust air from a sinter cooler and / or fresh air and / or pre-drying of the sinter mixture used air and / or technical Has oxygen to the mixed gas, a certain temperature and a certain oxygen content.
  • the minimum temperature is 90 ° C, preferably 100 ° C, and usually the highest temperature is up to 150 ° C, preferably up to 130 ° C.
  • the lower limit of the oxygen content is 15% by volume, preferably 17% by volume, but oxygen contents of up to 20% by volume or higher are also possible.
  • This temperature of the process gas for the second section it is ensured that the risk of corrosion in the system parts in contact with it is kept low.
  • This oxygen content ensures that a good sintering quality is achieved.
  • the highest possible oxygen content of the process gas for the second section is preferred.
  • the first section of the sintering belt usually occupies 5-25% of the length of the sintering belt, preferably 10-20%.
  • the second section of the sintering belt adjoining the first section usually occupies 50-85% of the length of the sintering belt, preferably 55-75%.
  • the third section of the sintering belt adjoining the second section of the sintering belt usually occupies 10-25% of the length of the sintering belt, preferably 15-20%.
  • Each section of the sintering belt is assigned the suction boxes arranged under it.
  • the sections of the sintering belt are each assigned at least two suction boxes.
  • the sintered exhaust gas from each section of the sintering belt is collected and discharged separately from the sintering exhaust gas of the other sections in the suction boxes associated with the respective section, whereby the discharge of the sintering exhaust gas can be regulated preferentially.
  • the sintered exhaust gas from the third section is transported to the sintered exhaust gas from the first section and combined with it in a mixing area to a mixed gas.
  • the transport distance of the sintering waste gas from the third section to the mixing area is greater than the transport distance of the sintering waste gas from the first section to the mixing area. Since the path which the cold sintered exhaust gas has to travel from the first section to the mixing zone should be as small as possible, the sintered exhaust gas from the third section should be combined with the sintering exhaust gas from the first section as close as possible to the first section. It is therefore particularly preferable that the sintered exhaust gas from the first section directly below the first section is combined with the sintered exhaust gas from the third section. Depending on the Structural conditions of the sintering machine, it may also be necessary to arrange the mixing area a little further away from the first section.
  • the mixed gas obtained by combining the sintered exhaust gases from the first and third sections is supplied to the second section as a process gas for the second section.
  • the lengths of the sections in the specified ranges can be varied and thus the properties of the mixed gas or of the process gas for the second section can be changed.
  • the entire sintering off-gas from the third section is combined with the entire sintering off-gas from the first section.
  • a portion of the sintering exhaust gas of one section is fed to the sintering exhaust gas of an adjacent section.
  • only the sintering exhaust gas accumulating in the boundary regions of the sections is supplied to the sintering exhaust gas of an adjacent section.
  • the boundary region is to be understood as meaning an area which extends on both sides of the boundary between the sections in each case over a length of up to 30% of the length of the respective section into the two adjacent sections.
  • the mixed gas for adjusting the temperature and the oxygen content of the process gas for the second section of air from a sinter cooler and / or fresh air, and / or used for predrying the sintering mixture used air and / or technical oxygen can be varied in the desired manner.
  • the oxygen-containing process gas for the first and / or third section may be, for example, fresh air, exhaust air from a sinter cooler, air used to predry the sintering mixture, a mixture of several of these gases, or a mixture of one or more of these gases with technical oxygen.
  • the sintered exhaust gas from the second section is heated with the aid of the sintering exhaust gas from the third section, without the two sintered exhaust gases mixing.
  • the risk of corrosion due to the condensation of acids as a result of their dew point being undershot is reduced in the lines leading the sintered exhaust gas from the second section.
  • the overall conduit is divided in its interior by longitudinally extending partitions into individual gas guide channels so that the hot sintered exhaust gas from the third section can not mix with the cooler sintered exhaust gas from the second section, but some of its heat to the sintered exhaust gas from the second section can transfer.
  • the dusts arising from the sintering exhaust gases of the various sections can be separated in a gas-tight manner, for example by means of chutes with gas-tight dust locks, from which the sintering exhaust gases leading gas guide channels are discharged.
  • the combined sintered exhaust gases from the second section are removed as exhaust gas from the sintering machine.
  • a colder sintering waste gas is introduced into a warmer sintered waste gas or into the combined warmer sintering waste gases.
  • the mixed gas is dedusted before use as a process gas for the second section.
  • the sintered exhaust gas is purified from the second section during its discharge as exhaust gas from the sintering machine, for example, by dedusting it and nitrogen oxides NO x or sulfur oxides SO x and other pollutants are removed.
  • the dusts obtained in these dedusting and cleaning operations as well as in the discharge from the gas guide channels are, as far as technically possible, used as additional material for the production of the sinter mixture.
  • the device according to the invention is a device for sintering metal-containing substances such as iron ores or manganese ores, in particular oxidic or carbonic ores, on a sintering machine with a feed device for a solid fuel-containing sintered mixture on a sintering belt, with an igniter for igniting the sintered mixture on the surface, with suction boxes for the passage of oxygen-containing process gas through the sintering mixture in three successive sections of the sintering belt, of which the first section connects to the feeder and the third section is bounded by the discharge end of the sintering belt, with a manifold for unification and forwarding of in the suction boxes Sinterabgases accumulating the third section, with an export line for combining and forwarding the costs incurred in the suction boxes of the second section sintered exhaust gas, with a device for the manufacture a mixed gas from the sintered exhaust gas from the first portion of the sintering belt and the sintered exhaust gas from the third portion of the s
  • the process gas is passed through the sintering mixture by applying a negative pressure to the suction boxes below the sintering belt by means of blowers. As a result, the process gas is sucked through the sintering mixture into the suction boxes.
  • a total of at least two, preferably speed-controlled, blowers are provided for the suction of the process gases through the first and the third section as well as through the second section.
  • the first section of the sintering belt usually occupies 15-25% of the length of the sintering belt, preferably 20-25%.
  • the second section of the sintering belt adjoining the first section usually occupies 50-65% of the length of the sintering belt, preferably 55-65%.
  • the third section of the sintering belt adjoining the second section of the sintering belt usually occupies 10-25% of the length of the sintering belt, preferably 15-25%.
  • the resulting in the suction boxes of the third section sintering gases are combined and directed away from the third section.
  • the sintered exhaust gas is transported from the respective suction boxes in the manifold.
  • the means for producing a mixed gas of the sintered exhaust gas from the first portion and the sintered exhaust gas from the third portion includes the manifold into which the connecting pipes extending from the suction boxes of the first portion open.
  • the area of the collecting line into which the connecting lines emerging from the suction boxes of the first section open is the mixing area. Through these connecting lines, the sintered exhaust gas from the first section fed into the manifold.
  • the distance of the third section from the mixing area is greater than the distance of the first section from the mixing area.
  • the mixing area is below the first section.
  • the device for producing a mixed gas is arranged below or laterally of the sintering belt. It preferably runs parallel to the sintering belt. A parallel course allows a compact design of the device according to the invention.
  • the gas is discharged from the export line from the sintering machine.
  • At least two suction boxes are arranged under each section.
  • a throttling device for example a throttle valve, is provided in at least one of the connecting lines extending from the suction boxes of the three sections.
  • this throttle device By means of this throttle device, the transport of the sintered exhaust gas can be regulated from the suction box connected to the connecting line.
  • the means for producing a mixed gas and the export line for the sintered exhaust gas from the second section of the sintering belt as separated by partitions, adjacent gas ducts inside a arranged below the suction boxes, preferably parallel to the sintering belt extending, arranged overall line.
  • the arrangement below the suction boxes parallel to the sintering belt allows a particularly compact design of the device.
  • Within the overall heat exchange takes place between the adjacent gas guide channels.
  • the temperature of the sintering exhaust gas from the second section of the sintering belt is increased by the warmer sintered exhaust gas from the third section of the sintering belt. This increase in temperature reduces the risk of corrosion in the export line.
  • chutes are provided with gas-tight dust locks in the gas ducts of the overall line for discharging the depositing dusts. These dusts can, as far as process technology possible, be used in the production of the sintering mixture.
  • the device for transporting and distributing the mixed gas as process gas for the second section to the sintering mixture in the second section of the sintering belt comprises a return line containing at least one dedusting system and a distribution hood.
  • the return line opens at one end into the mixing region of the device for producing a mixed gas and at the other end into the distribution hood.
  • the dedusting system is, for example, a cyclone or an electrostatic precipitator.
  • a dedusting system and / or an exhaust gas purification system with, for example, a dedusting system and a system for removing NO x and SO x is provided in the exhaust pipe.
  • the dedusting systems in the return line, in the exhaust pipe and in the exhaust gas cleaning system separate entrained dust from the mixed gas or the exhaust gas.
  • the separated dust can, as far as process technology possible, be used in the production of the sintered mixture.
  • lines for supplying exhaust air from the sinter cooler and / or fresh air and / or air used for predrying the sintering mixture and / or technical oxygen flow into the return line.
  • the gases supplied through these lines make it possible to change the temperature and the oxygen content of the mixed gas before it is conducted via the distribution hood as process gas for the second section to the sintered mixture in the second section of the sintering belt.
  • a static mixer is provided in the return line, which is located in front of the opening into the distribution hood end of the return line.
  • the outgoing from the suction boxes connecting lines each have two orifices, one of which leads into the manifold of the device for producing a mixed gas and the other in the export line.
  • only those connecting lines each have two orifices emanating from suction boxes, which lie in the boundary region of adjacent sections.
  • the mouths can be opened and closed, wherein preferably in each case an orifice is closed and an orifice is opened. In this way, it can be controlled whether a part of the sintering exhaust gas of one section is forwarded together with the remaining sintering exhaust gas of the corresponding section, or whether it is passed along with the sintering exhaust gas of the adjacent section.
  • lines for supplying exhaust air from the sinter cooler are provided on the first and / or third section of the sintering belt.
  • exhaust air from the sinter cooler can be used in each of the two sections as a process gas or as part of the process gas.
  • a dedusting system In the lines for supplying exhaust air from the sinter cooler is preferably provided a dedusting system. The dust separated in this dedusting plant can, as far as it is technically possible, be used in the production of the sintering mixture.
  • lines for admixing technical oxygen into the lines for supplying exhaust air from the sinter cooler open onto the first and / or third section of the sintering belt.
  • FIG. 1 shows a schematic flow diagram of a sintering machine operating according to the invention.
  • the solid fuel-containing sintered mixture 2 is applied to the sintering belt 3.
  • the sintered belt 3 loaded with sintered mixture 2 runs from the feeding device 1 in the direction of the discharge end 4 of the sintering belt and transports the sintering mixture 2 away from the feeding device 1.
  • the running direction is indicated by an arrow 5.
  • the ignition device 6 the sintered mixture 2 is ignited on the surface.
  • Process gas 8 is passed through the sintering mixture 2 in the first section 9 of the sintering belt, process gas 10 through the sintering mixture 2 in the second section 11 of the sintering belt, and process gas 12 through the sintering mixture 2 in the third section 13 of the sintering belt by means of suction boxes 7 arranged below the sintering belt 3.
  • Connecting lines 14a, 14b, 14c discharge the sintered exhaust gas from the suction boxes 7.
  • the sintered exhaust gas accumulating in the suction boxes 7 under the first section 9 is fed via the connecting lines 14a in the mixing area into the collecting line 15 of the device for producing a mixed gas.
  • the sintered exhaust gas accumulating in the suction boxes under the second section 11 is fed via the connecting lines 14b into the export line 16.
  • the sintered exhaust gas accumulating in the suction boxes under the third section 13 is fed into the manifold 15 via the connecting pipes 14c.
  • the discharge end 4 of the sintering belt is followed by a sinter cooler 17.
  • the mixed gas is passed from the device for producing a mixed gas as a process gas 10 to the sintered mixture 2 in the second section 11.
  • a static mixer 20 in the return line 18 In front of the distribution hood 19 is a static mixer 20 in the return line 18.
  • the sintered exhaust gas from the second section 11 of an exhaust gas purification system 22 is supplied before it is released into the environment.
  • a fan 23 provides for the transport of the mixed gas in the return line 18.
  • a fan 24 ensures the transport of the sintered exhaust gas from the second section 11 in the export line 16 and in the exhaust pipe 21.
  • a dedusting system 25 is present in the return line 18.
  • a dedusting system 26 is present in the exhaust pipe 21, a dedusting system 26 is present.
  • the connecting lines 14a, the connecting lines 14b and the connecting lines 14c which emanate from suction boxes 7 in the boundary region of the first section 9 and second section 11 and of suction boxes 7 in the boundary region of the second section 11 and third section 13, open into both the manifold 15 of Means for producing a mixed gas as well as in the export line 16.
  • the lines 31 and 32 lead exhaust air from the sinter cooler 17 to the first section 9 and the third section 13 to.
  • the exhaust air from the sinter cooler is dedusted by means of a dedusting system 33 and transported by means of a blower 34.
  • Control valves 35 regulate the gas flow in the lines 27, 31 and 32 for supplying exhaust air from the sinter cooler.
  • the gas flow in the return line 18 is regulated by means of a control flap 36.
  • a line connection 37 connects the return line 18 to the exhaust pipe 21.
  • the mixed gas can be fed into the exhaust pipe 21 of the sintering machine.
  • the gas flow in the line connection 37 is regulated by means of a shut-off flap 38.
  • Throttles 39 in two connecting lines 14a allow the regulation of the gas flow through these two connecting lines 14a.
  • FIG. 2 shows a schematic section in the boundary region of the first and second sections by a sintering machine with overall line.
  • Oxygen-containing process gas 8 is passed through the suction box 7 through the sintering mixture 2 located on the sintering belt 3.
  • the resulting sintered exhaust gas is introduced through the connection line 14a in the manifold 15 of the device for producing a mixed gas.
  • the connecting line 14 a has an opening which opens into the manifold 15, and an opening which opens into the export line 16.
  • In front of the mouths are butterfly valves 40.
  • the mouth into the manifold 15 is open, the mouth in the export line 16 is closed by the butterfly valve 40.
  • Manifold 15 and export line 16 are arranged within a total line 41 as separated by partitions 42, adjacent gas guide channels.
  • a chute 43 is mounted with gas-tight dust lock 44 in the manifold 15.

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Claims (14)

  1. Dispositif pour le frittage de matières qui contiennent des métaux, comme par exemple des minerais de fer ou des minerais de manganèse, notamment des minerais oxydés ou carbonatés, sur une machine de frittage comprenant un dispositif d'alimentation (1) d'un mélange de frittage (2) contenant un combustible solide sur une bande de frittage (3), comprenant un dispositif d'inflammation (6) pour l'inflammation du mélange de frittage à la surface, comprenant des caisses aspirantes (7) pour guider un gaz de procédé (8, 10, 12) contenant de l'oxygène à travers le mélange de frittage dans trois parties (9, 11, 13) de la bande de frittage qui se suivent, dont la première partie (9) est adjacente au dispositif d'alimentation (1) et la troisième partie (13) est limitée par l'extrémité de décharge (4) de la bande de frittage, comprenant une conduite collectrice (15) pour rassembler et acheminer l'effluent gazeux de frittage produit dans les caisses aspirantes (7) de la troisième partie (13), comprenant une conduite de transfert (16) pour rassembler et acheminer l'effluent gazeux de frittage produit dans les caisses aspirantes (7) de la deuxième partie (11), comprenant un dispositif de production d'un mélange gazeux à partir de l'effluent gazeux de frittage de la première partie (9) de la bande de frittage et de l'effluent gazeux de frittage de la troisième partie (13) de la bande de frittage, comprenant des conduites de liaison (14c) pour l'alimentation des effluents gazeux de frittage sortant des caisses aspirantes (7) de la troisième partie (13) dans la conduite collectrice (15), des conduites de liaison (14b) pour l'alimentation des effluents gazeux de frittage sortant des caisses aspirantes (7) de la deuxième partie (11) dans la conduite de transfert (16) et des conduites de liaison (14a) pour l'alimentation des effluents gazeux de frittage sortant des caisses aspirantes (7) de la première partie (9) dans de dispositif de production d'un mélange gazeux, comprenant un dispositif de transport et de distribution du mélange gazeux en tant que gaz de procédé (10) pour la deuxième partie sur le mélange de frittage (2) dans la deuxième partie (11) de la bande de frittage, comprenant une conduite d'effluent gazeux (21) pour évacuer le gaz de la conduite de transfert (16) pour l'effluent gazeux de frittage de la deuxième partie de la bande de frittage à l'extérieur de la machine de frittage, et comprenant un refroidisseur d'aggloméré (17) situé derrière l'extrémité de décharge (4) de la bande de frittage, caractérisé en ce que le dispositif de production d'un mélange gazeux comprend la conduite collectrice (15) pour les effluents gazeux de frittage de la troisième partie (13) de la bande de frittage et une zone de mélange de la conduite collectrice (15) dans laquelle débouchent les conduites de liaison (14a) pour l'alimentation de l'effluent gazeux de frittage sortant des caisses aspirantes (7) de la première partie (9) de la bande de frittage, la distance entre la troisième partie (13) et la zone de mélange étant plus grande que la distance entre la première partie (9) et la zone de mélange, la zone de mélange étant située sous la première partie (9) et les conduites de liaison (14a, 14b, 14c) partant des caisses aspirantes (7) ayant à chaque fois deux orifices de sortie dont l'un débouche dans la conduite collectrice (15) du dispositif de production d'un mélange gazeux et l'autre débouche dans la conduite de transfert (16).
  2. Dispositif selon la revendication 1, caractérisé en ce que la conduite collectrice (15) du dispositif de production d'un mélange de gazeux s'étend parallèlement à la bande de frittage (3).
  3. Dispositif selon l'une des revendications 1-2, caractérisé en ce qu'au moins deux caisses aspirantes (7) sont disposées sous chaque partie (9, 11, 13) de la bande de frittage (3).
  4. Dispositif selon l'une des revendications 1-3, caractérisé en ce que le dispositif de production d'un mélange gazeux et la conduite de transfert (16) pour l'effluent gazeux de frittage de la deuxième partie de la bande de frittage sont disposés en tant que canaux de conduite de gaz séparés l'un de l'autre à l'intérieur d'une conduite générale (41) située en-dessous des caisses aspirantes (7), de préférence en s'étendant parallèlement à la bande de frittage (3).
  5. Dispositif selon la revendication 1, caractérisé en ce que, pour évacuer la poussière produite dans les canaux de conduite de gaz, on prévoit des goulottes (43) pourvues de sas à poussière (44) étanches au gaz.
  6. Dispositif selon l'une des revendications 1-5, caractérisé en ce que la première partie (9) de la bande de frittage occupe 15-25%, de préférence 20-25%, de la longueur de la bande de frittage, la deuxième partie (11) occupe 50-65%, de préférence 55-65%, de la longueur de la bande de frittage et la troisième partie (13) occupe 10-25%, de préférence 15-25%, de la longueur de la bande de frittage.
  7. Dispositif selon l'une des revendications 1-6, caractérisé en ce que le dispositif de transport et de distribution du mélange gazeux sur le mélange de frittage dans la deuxième partie (11) de la bande de frittage comprend une conduite de recyclage (18) comportant au moins une installation de dépoussiérage (26), ainsi qu'une hotte de distribution (19).
  8. Dispositif selon la revendication 7, caractérisé en ce que des conduites (27, 28, 29 ,30) d'alimentation en air de sortie du refroidisseur d'aggloméré et/ou en air frais et/ou en air utilisé pour le séchage préalable du mélange de frittage et/ou en oxygène technique débouchent dans la conduite de recyclage (18).
  9. Dispositif selon l'une des revendications 7-8, caractérisé en ce qu'un mélangeur statique (20) est prévu dans la conduite de recyclage (18).
  10. Dispositif selon l'une des revendications 1-9, caractérisé en ce qu'une installation de dépoussiérage (26) et/ou une installation de purification d'effluent gazeux (22) est/sont prévue/s dans la conduite d'effluent gazeux (21).
  11. Dispositif selon l'une des revendications 1-10, caractérisé en ce que seules les conduites de liaison (14a, 14b, 14c) qui partent des caisses aspirantes (7) situées dans la zone limite entre des parties (9, 11, 13) contiguës sont pourvues à chaque fois de deux orifices de sortie.
  12. Dispositif selon l'une des revendications 1-11, caractérisé en ce que l'on prévoit des conduites (31, 32) d'amenée du gaz de sortie du refroidisseur d'aggloméré sur la première partie (9) et/ou la troisième partie (13) de la bande de frittage.
  13. Dispositif selon l'une des revendications 1-12, caractérisé en ce que l'on prévoit, au total, au moins deux soufflantes (23, 24) pour l'aspiration des gaz de procédé à travers la première partie (11) et la troisième partie (13), ainsi qu'à travers la deuxième partie (11).
  14. Dispositif selon l'une des revendications 1-13, caractérisé en ce que l'on prévoit un dispositif d'étranglement (39) dans au moins une des conduites de liaison (14a, 14b, 14c).
EP07702736.5A 2006-01-19 2007-01-12 Une machine de frittage Active EP1974066B1 (fr)

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AT0009106A AT503199B1 (de) 2006-01-19 2006-01-19 Verfahren zum sintern auf einer sintermaschine
PCT/EP2007/000264 WO2007082694A1 (fr) 2006-01-19 2007-01-12 Procede de frittage sur une machine de frittage

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KR101413515B1 (ko) 2014-07-01
CA2637230C (fr) 2014-11-25
PL1974066T3 (pl) 2015-04-30
CN101370948A (zh) 2009-02-18
US7914731B2 (en) 2011-03-29
JP2009523912A (ja) 2009-06-25
AU2007207112B2 (en) 2011-07-21
BRPI0706552B8 (pt) 2016-11-16
JP5363118B2 (ja) 2013-12-11
AU2007207112A1 (en) 2007-07-26
ZA200806272B (en) 2009-11-25
AT503199A1 (de) 2007-08-15
CN101370948B (zh) 2011-05-18
BRPI0706552A2 (pt) 2011-03-29
AT503199B1 (de) 2008-02-15
KR20080086531A (ko) 2008-09-25
EP1974066A1 (fr) 2008-10-01
CA2637230A1 (fr) 2007-07-26
ES2524250T3 (es) 2014-12-04
WO2007082694A1 (fr) 2007-07-26
US20100242684A1 (en) 2010-09-30
RU2429301C2 (ru) 2011-09-20
UA91112C2 (ru) 2010-06-25
BRPI0706552B1 (pt) 2016-06-14
RU2008133999A (ru) 2010-02-27

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