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EP2792757B1 - Procédé et module de séchage destinés au séchage de granulés verts - Google Patents

Procédé et module de séchage destinés au séchage de granulés verts Download PDF

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Publication number
EP2792757B1
EP2792757B1 EP13164220.9A EP13164220A EP2792757B1 EP 2792757 B1 EP2792757 B1 EP 2792757B1 EP 13164220 A EP13164220 A EP 13164220A EP 2792757 B1 EP2792757 B1 EP 2792757B1
Authority
EP
European Patent Office
Prior art keywords
drying
green pellets
zone
gas stream
post
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.)
Not-in-force
Application number
EP13164220.9A
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German (de)
English (en)
Other versions
EP2792757A1 (fr
Inventor
Stephan Hattinger
Bernhard Hiebl
Stefan Hötzinger
Hans Herbert Stiasny
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
Primetals Technologies Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP13164220.9A priority Critical patent/EP2792757B1/fr
Priority to PCT/EP2014/052879 priority patent/WO2014170045A1/fr
Publication of EP2792757A1 publication Critical patent/EP2792757A1/fr
Application granted granted Critical
Publication of EP2792757B1 publication Critical patent/EP2792757B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets

Definitions

  • the invention relates to a method and a drying unit for drying green pellets, wherein the green pellets are continuously fed as a pellet layer on a conveyor of the drying unit, and wherein the green pellets transported by the conveyor successively in a pre-drying zone, in a post-drying zone and in a cooling zone of the drying unit be blown in each of which a gas stream for drying the green pellets through the pellet layer.
  • pellets are burned before use in the metallurgical processing unit by heat treatment in a heat treatment device at temperatures around 1300 ° C and thereby hardened to pellets with sufficient strength.
  • pellets which have not yet been cured are called green pellets. The heat treatment is done so that the green pellets are mixed with solid fuel and applied to a traveling grate.
  • an external heat supply for example, by the fact that the green pellets are brought by supplying hot air to the ignition temperature of the fuel, whereupon the fuel is burned, and the green pellets on Hardening be brought. Also that layer of green pellets, which rests directly on the traveling grate, must be brought to hardening temperature. Not only are the green pellets brought to the desired hardening temperature, but also the traveling grate, on which the green pellets rest, is heated to a great extent. This represents a strong temperature load on the traveling grate, which can lead to impairment or even damage to the traveling grate.
  • Remedies are for example from the DE 1 047 226 known.
  • Such remedial measures consist in applying a grate covering which protects against the excessive temperature load rust coating or in a cooling of the traveling grate.
  • Such a grate usually consists of already hardened pellets, since only they have the required strength to withstand the stresses occurring during the heat treatment.
  • a first subset of the already hardened pellets is usually recycled as return material to the beginning of the heat treatment process, where it is applied as a rust coating on the traveling grate.
  • a second subset or the remainder of the already hardened pellets can be used directly in the metallurgical processing units.
  • US4636342 discloses a drying apparatus for drying green pellets.
  • the object to be solved of the present invention is to provide a method and an apparatus by means of which the productivity is increased in comparison to the prior art.
  • the green pellets contain a fine iron ore content of more than 96% by mass, preferably more than 96.5% by mass and less than 98% by mass, preferably less than 97.5% by mass. Further, the green pellets contain less than 4% by mass, preferably less than 3.5% by mass and more than 2% by mass, preferably more than 2.5% by mass of binders and additives.
  • Feine iron ore is an iron ore particle consisting of iron ore, where 100% of the iron ore particles have a particle size of less than 105 ⁇ m and 80% of the iron ore particles have a particle size of less than 45 ⁇ m.
  • the green pellets are conveyed by means of the feeding system continuously to the conveyor of the drying unit or applied to this as a pellet layer and then transported to the predrying zone.
  • “continuous”, “continuous”, “permanent”, “uninterrupted” or “continuous” are to be understood as continuous.
  • the first gas stream is blown from bottom to top through the pellet layer, thereby pre-drying the green pellets.
  • the first gas stream consists of ambient air at ambient temperature, which is sucked in and, after heating to a temperature between 105 ° C and 310 ° C as the first gas stream is blown from bottom to top through the pellet layer.
  • ambient temperature is meant the temperature of the environment in which the method according to the invention is carried out.
  • the third gas stream consists of ambient air at ambient temperature, which is sucked in and which is heated by heat transfer from the green pellets of the pellet layer to the third gas stream to a temperature between 140 ° C and 160 ° C. At the same time, the green pellets are cooled down. At least a portion of the heated third gas stream is supplied to the second gas stream before it is blown through the pellet layer in the post-drying zone.
  • the second gas stream consists of the heated third gas stream.
  • the green pellets according to the invention After drying the green pellets according to the invention, they have the strength required for use in a subsequent heat treatment device, for example in a curing device.
  • the application of a rust coating to protect the traveling grate of the heat treatment device from already hardened in the heat treatment device pellets is no longer necessary.
  • the entire amount of hardened pellets which have passed through the heat treatment process in the heat treatment device can be further processed directly in a metallurgical processing unit.
  • the productivity can be increased up to 100%.
  • heat energy contained in the hot exhaust gas can be used to heat the first and / or second gas flow, resulting overall in an improved energy balance of the method according to the invention.
  • the residence time of the green pellets in the predrying zone is between 5 minutes and 15 minutes.
  • the residence time of the green pellets in the post-drying zone is also between 5 minutes and 15 minutes.
  • the residence time of the green pellets in the cooling zone is between 5 minutes and 20 minutes.
  • the temperature of the green pellets is thereby reduced so far that the green pellets can be introduced into a subsequent heat treatment device without the use of hot transport devices.
  • a preferred embodiment of the method according to the invention is characterized in that the thickness of the pellet layer is at least 200 mm, preferably at least 250 mm and at most 600 mm, preferably at most 350 mm.
  • the moisture content of the green pellets after cooling in the cooling zone of the drying unit is less than 1.2 percent by mass, preferably less than 1.1 percent by mass, more preferably less than 1 percent by mass, based on the mass of green pellets.
  • the green pellets have an optimum moisture content for use in a subsequent heat treatment device.
  • Moisture content means the mass of water based on the total mass of the green pellets.
  • the temperature of the green pellets after their cooling in the cooling zone of the drying unit is in a further embodiment of the method according to the invention less than 120 ° C, preferably less than 110 ° C, more preferably less than 100 ° C.
  • the pellet layer is transported by means of the conveying device on a substantially circular path.
  • the pre-drying zone, the post-drying zone and the cooling zone are successively arranged on this substantially circular path.
  • the conveyor is constructed of individual tiltable trolley with a grid.
  • the individual trolleys are mechanically coupled with each other and are guided on rails in a circle.
  • the green pellets deposited on the conveyor form a pellet layer.
  • the conveyor By means of the conveyor, the pellet layer is therefore transported on a circular path through the pre-drying zone, the post-drying zone and the cooling zone to a removal point. This results in the advantage of a compact, robust and inexpensive construction of the drying unit.
  • the trolleys are tilted and the green pellets contained therein are removed.
  • the distance between the sampling point and the delivery system is short, whereby a higher utilization of the conveyor is possible compared to a transport of the pellet layer on a linear path, since the way the emptied trolley between the sampling point and the task system travel is also short.
  • the drying unit comprises the following successive zones: the pre-drying zone, the post-drying zone and the cooling zone.
  • the predrying zone comprises the first supply line for feeding the first gas stream into the lower region of the predrying zone. Downstream of the pre-drying zone is the after-drying zone with the second supply line for supplying the second gas stream in the lower region of the post-drying zone. Downstream of the post-drying zone is the cooling zone with the third supply line for supplying the third gas stream in the lower region of the cooling zone.
  • the conveyor passes through these zones, so that the pellet layer, which is located on the conveyor, is successively transported in and out of the respective zones of the drying unit.
  • the term "lower region” refers to a region of the pre-drying zone, the post-drying zone or the cooling zone, which is located below the conveyor.
  • the cooling zone further comprises the cooling gas discharge line for discharging the third gas flow from the upper region of the cooling zone, the cooling gas discharge line being connected to the second supply line via the connecting line.
  • upper portion of the cooling zone refers to a portion of the cooling zone which is above the conveyor.
  • the green pellets are dried in such a way that they have a strength required for use in a subsequent heat treatment device, for example a hardening device.
  • a subsequent heat treatment device for example a hardening device.
  • the application of a rust coating to protect the traveling grate of the heat treatment device from already hardened in the heat treatment device pellets is no longer necessary.
  • the productivity can be increased up to 100%.
  • At least one fan for compressing one of the gas streams is present in each of the supply lines.
  • At least one heating device for heating the first and / or the second gas flow is present in the first and / or in the second supply line.
  • the first gas stream is heated to a temperature between 105 ° C and 310 ° C and / or the second gas stream is heated to a temperature between 105 ° C and 350 ° C.
  • the feed system comprises a reciprocating conveyor, a broadband and a roller grate for continuously feeding the green pellets to the conveyor, wherein the predrying zone, the post-drying zone and the cooling zone are arranged in a circle and substantially in the same plane around a center , and wherein the pre-drying zone, the post-drying zone and the cooling zone are operatively connected to one another by means of the conveyor.
  • the Reciprocating Conveyor is a conveyor with a hydraulically movable head, so that the broadband, whose direction of movement is normal to the direction of movement of Reciprocating Conveyors, using the Reciprocating Conveyor regulated across the width of the broadband is fed with the green pellets.
  • the pre-drying zone, the post-drying zone and the cooling zone are arranged in a circle or these zones are arranged along a circle.
  • the pellet layer is transported by the conveyor on a circular path.
  • the pre-drying zone, the post-drying zone and the cooling zone are successively arranged on this substantially circular path.
  • the conveyor is constructed of individual tiltable trolley with a grid.
  • the individual trolleys are mechanically coupled with each other and are guided on rails in a circle.
  • the green pellets deposited on the conveyor form a pellet layer.
  • the pellet layer is therefore transported on a circular path through the pre-drying zone, the post-drying zone and the cooling zone to a removal point. This results in the advantage a compact, robust and inexpensive construction of the drying unit.
  • the predrying zone and / or the after-drying zone comprises a discharge line for removing the first gas stream or the second gas stream.
  • the discharge line is arranged in an upper region of the predrying zone or the after-drying zone for the removal of the first or the second gas stream.
  • the terms "upper portion of the predrying zone” and “upper portion of the post-drying zone” refer to areas of the predrying zone and the post-drying zone, respectively, which are located above the conveyor.
  • the first or second gas stream blown through the pellet layer is not discharged directly into the environment, which makes it possible, for example, to utilize the thermal energy contained in the gas streams.
  • the application of a rust coating to protect the traveling grate of the heat treatment device from already hardened in the heat treatment device pellets is no longer necessary. These can be substituted by green pellets dried according to the invention. As a result, the entire amount of hardened pellets which have passed through the heat treatment process in the heat treatment device can be further processed directly in a metallurgical processing unit. The productivity can be increased up to 100%.
  • FIG. 1 shows by way of example and schematically an inventive method and a drying unit according to the invention in plan view.
  • FIG. 1 shows, by way of example and schematically, a method according to the invention and a drying unit 2 according to the invention in a plan view (top view).
  • the Reciprocating Conveyor 17 is a conveyor with a hydraulically movable head, so that the broadband 18 whose direction of movement is normal to the direction of movement of Reciprocating Conveyors 17 - in Figure 1, these directions of movement by means of the Reciprocating Conveyor 17 outgoing and on the broadband 18, indicated to the right arrow - regulated by means of Reciprocating Conveyors 17 over the entire width of the broadband 18 with the green pellets 1 can be loaded.
  • the conveyor 3 is constructed of individual tiltable trolley with a grid.
  • the individual trolleys are mechanically coupled to each other and are guided on rails in a circle with the center M.
  • the green pellets 1 applied to the conveyor 3 form a pellet layer. By means of the conveyor 3, the pellet layer is therefore transported on a circular path.
  • the thickness of the pellet layer is at least 200 mm, preferably at least 250 mm and at most 600 mm, preferably at most 350 mm.
  • This pellet layer is continuously introduced by means of the conveyor 3 into a predrying zone 4 of the drying unit 2.
  • a first gas stream 5 with a temperature between 105 ° C. and 310 ° C. is blown through the pellet layer for predrying the green pellets 1 from bottom to top by means of a first supply line 11.
  • the first gas stream 5 is supplied with hot exhaust gas 10 from a pellet heat treatment device before being blown through the pellet layer.
  • heater 16 which is designed as a burner
  • the first gas stream 5 is heated.
  • the heated first gas stream 5 is compressed by means of a blower 15 and introduced into a lower region of the predrying zone 4.
  • a discharge line 20 the first gas stream 5 blown through the pellet layer is removed from an upper region of the predrying zone 4.
  • the residence time of the green pellets 1 in the predrying zone 4 is between 5 minutes and 15 minutes.
  • the pre-dried in the pre-drying zone 4 green pellets 1 are continuously introduced by means of the conveyor 3 in a post-drying zone 6 of the drying unit 2.
  • a second gas stream 7 with a temperature between 105 ° C and 350 ° C is blown from bottom to top through the pellet layer for after-drying of the green pellets 1 by means of a second supply line 12.
  • the second gas stream 7 is supplied with hot exhaust gas 10 from a pellet heat treatment device prior to being blown through the pellet layer.
  • heater 16 which is designed as a burner, the second gas stream 7 is heated.
  • the heated second gas stream 7 is compressed by means of a blower 15 and introduced into a lower region of the after-drying zone 6.
  • a discharge line 20 By means of a discharge line 20, the blown through the pellet layer second gas stream 7 is discharged from an upper portion of the after-drying zone 6.
  • the residence time of the green pellets 1 in the after-drying zone 6 is between 5 minutes and 15 minutes.
  • the green pellets 1 dried in the after-drying zone 6 are continuously introduced into a cooling zone 8 of the drying unit 2 by means of the conveying device 3.
  • a cooling zone 8 is by means of a third supply line 13, a third gas stream 9 with ambient temperature, with simultaneous heating of the third gas stream 9 to a temperature between 140 ° C and 160 ° C, from bottom to top through the pellet layer blown through to cool the green pellets 1.
  • the third gas stream 9 is compressed by means of a blower 15.
  • the third gas flow 9 is also introduced into a lower region of the cooling zone 8.
  • the residence time of the green pellets 1 in the cooling zone 8 is between 5 minutes and 20 minutes.
  • the green pellets 1 cooled in the cooling zone 8 have a moisture content of less than 1.2%, preferably less than 1.1%, particularly preferably less than 1%, based on the mass of the green pellets 1.
  • the temperature of the green pellets 1 after their cooling in the cooling zone 8 of the drying unit 2 is less than 120 ° C, preferably less than 110 ° C, more preferably less than 100 ° C and at a removal point 22 of the conveyor 3 by tilting the trolley taken from the sampling point 22.
  • the green pellets 1 removed at the removal point 22 are used as a rust coating in a heat treatment device, for example in a sintering plant.
  • the green pellets 1 dried according to the invention can be used directly as a rust coating in a heat treatment device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Drying Of Solid Materials (AREA)

Claims (15)

  1. Procédé de séchage de granulés verts (1) dans une unité de séchage (2), le procédé comprenant les étapes de procédé :
    • alimentation continue des granulés verts (1) en tant que couche de granulés au moyen d'un système d'alimentation sur un dispositif de transport (3) de l'unité de séchage (2), ensuite
    • transport continu de la couche de granulés au moyen du dispositif de transport (3) dans une zone de pré-séchage (4) de l'unité de séchage (2), dans laquelle zone de pré-séchage un premier flux de gaz (5) est soufflé avec une température comprise entre 105°C et 310°C du bas vers le haut à travers la couche de granulés pour le pré-séchage des granulés verts (1), ensuite
    • transport continu, au moyen du dispositif de transport (3), des granulés verts (1) préséchés dans une zone de post-séchage (6) de l'unité de séchage (2), dans laquelle zone de post-séchage un deuxième flux de gaz (7) est soufflé avec une température comprise entre 105°C et 350°C du bas vers le haut à travers la couche de granulés pour le post-séchage des granulés verts (1), ensuite
    • transport continu, au moyen du dispositif de transport (3), des granulés verts (1) séchés ultérieurement dans une zone de refroidissement (8) de l'unité de séchage (2), dans laquelle zone de refroidissement un troisième flux de gaz (9) est soufflé avec température ambiante du bas vers le haut à travers la couche de granulés pour refroidir les granulés verts (1) avec échauffement simultané du troisième flux de gaz (9) à une température comprise entre 140°C et 160°C, et au moins une quantité partielle du troisième flux de gaz échauffé (9) étant amenée au deuxième flux de gaz (7) avant que celui-ci soit soufflé à travers la couche de granulés.
  2. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que du gaz d'échappement chaud (10) en provenance d'un dispositif de traitement thermique pour granulés est amené au premier flux de gaz (5) et/ou au deuxième flux de gaz (7) avant le soufflage à travers la couche de granulés.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la durée de séjour des granulés verts (1) dans la zone de pré-séchage (4) est comprise entre 5 minutes et 15 minutes.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la durée de séjour des granulés verts (1) dans la zone de post-séchage (6) est comprise entre 5 minutes et 15 minutes.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la durée de séjour des granulés verts (1) dans la zone de refroidissement (8) est comprise entre 5 minutes et 20 minutes.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de la couche de granulés est d'au moins 200 mm, de préférence d'au moins 250 mm et au maximum de 600 mm, de préférence au maximum de 350 mm.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le degré d'humidité des granulés verts (1) après leur refroidissement dans la zone de refroidissement (8) de l'unité de séchage (2) est inférieur à 1,2%, de préférence inférieur à 1,1%, de manière particulièrement préférée inférieur à 1% par rapport à la masse totale des granulés verts (1).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température des granulés verts (1) après leur refroidissement dans la zone de refroidissement (8) de l'unité de séchage (2) est inférieure à 120°C, de préférence inférieure à 110°C, de manière particulièrement préférée inférieure à 100°C.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche de granulés est transportée sur une voie essentiellement circulaire au moyen du dispositif de transport (3).
  10. Unité de séchage (2) destinée au séchage de granulés verts (1), l'unité de séchage comprenant :
    • un système d'alimentation pour l'alimentation continue des granulés verts (1) sur un dispositif de transport (3) en tant que couche de granulés,
    • le système de transport (3) pour le transport continu de la couche de granulés dans une zone de pré-séchage, dans une zone de post-séchage (6) et dans une zone de refroidissement (8) de l'unité de séchage (2),
    • la zone de pré-séchage (4) pour le pré-séchage des granulés verts (1), comprenant une première conduite d'alimentation (11) destinée à alimenter un premier flux de gaz (5) dans une partie inférieure de la zone de pré-séchage (4),
    • la zone de post-séchage (6) disposée en aval de la zone de pré-séchage (4), destinée au post-séchage des granulés verts (1), comprenant une deuxième conduite d'alimentation (12) destinée à alimenter un deuxième flux de gaz (7) dans une partie inférieure de la zone de post-séchage (6),
    • la zone de refroidissement (8) disposée en aval de la zone de post-séchage (6), destinée au refroidissement des granulés verts (1), comprenant une troisième conduite d'alimentation (13) destinée à alimenter un troisième flux de gaz (9) dans une partie inférieure de la zone de refroidissement (8) et une conduite d'évacuation de gaz refroidi (14) pour l'évacuation du troisième flux de gaz (9) hors d'une partie supérieure de la zone de refroidissement (8), la conduite d'évacuation de gaz refroidi (14) étant raccordée à la deuxième conduite d'alimentation (12) par l'intermédiaire d'une conduite de raccordement (21).
  11. Unité de séchage (2) selon la revendication 10, caractérisée en ce que dans chacune des conduites d'alimentation (11, 12, 13) au moins un ventilateur (15) est présent pour comprimer un des flux de gaz.
  12. Unité de séchage (2) selon l'une quelconque des revendications 10 ou 11, caractérisée en ce que dans la première et/ou dans la deuxième conduites d'alimentation (11, 12), au moins un dispositif de chauffage (16), notamment un brûleur, est présent pour échauffer le premier et/ou le deuxième flux de gaz (5, 7).
  13. Unité de séchage (2) selon l'une quelconque des revendications 10 à 12, caractérisée en ce que le système d'alimentation comprend un convoyeur à mouvement alternatif (17), une bande large (18) et un crible à rouleaux (19) pour l'alimentation continue des granulés verts (1) sur le dispositif de transport (3), et en ce que la zone de pré-séchage (4), la zone de post-séchage (6) et la zone de refroidissement (8) sont disposées de manière circulaire et essentiellement dans le même plan autour d'un centre (M), la zone de pré-séchage (4), la zone de post-séchage (6) et la zone de refroidissement (8) étant raccordées entre elles de manière opérationnelle au moyen du dispositif de transport (3).
  14. Unité de séchage (2) selon l'une quelconque des revendications 10 à 13, caractérisée en ce que la zone de pré-séchage (4) et/ou la zone de post-séchage (6) comprennent une conduite d'évacuation (20) pour évacuer le premier flux de gaz (5) respectivement le deuxième flux de gaz (7).
  15. Utilisation des granulés verts (1) séchés selon le procédé selon l'une quelconque des revendications 1 à 9, en tant que couche de grille dans un dispositif de traitement thermique, notamment une installation d'agglomération, destiné à durcir les granulés.
EP13164220.9A 2013-04-18 2013-04-18 Procédé et module de séchage destinés au séchage de granulés verts Not-in-force EP2792757B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13164220.9A EP2792757B1 (fr) 2013-04-18 2013-04-18 Procédé et module de séchage destinés au séchage de granulés verts
PCT/EP2014/052879 WO2014170045A1 (fr) 2013-04-18 2014-02-14 Procédé et appareil de séchage pour le séchage de granulés crus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13164220.9A EP2792757B1 (fr) 2013-04-18 2013-04-18 Procédé et module de séchage destinés au séchage de granulés verts

Publications (2)

Publication Number Publication Date
EP2792757A1 EP2792757A1 (fr) 2014-10-22
EP2792757B1 true EP2792757B1 (fr) 2016-03-02

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EP13164220.9A Not-in-force EP2792757B1 (fr) 2013-04-18 2013-04-18 Procédé et module de séchage destinés au séchage de granulés verts

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WO (1) WO2014170045A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047226B (de) 1956-03-22 1958-12-24 Metallgesellschaft Ag Verfahren zum Brennen und Haerten von Pellets, die Eisen in oxydierbarer Form enthalten
JPS5540093B2 (fr) * 1973-12-17 1980-10-15
JPS59157229A (ja) * 1983-02-28 1984-09-06 Nippon Kokan Kk <Nkk> 非焼成塊成鉱の製造方法および装置
DE19513550B4 (de) * 1995-04-10 2005-03-03 Siemens Ag Pelletieranlage

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EP2792757A1 (fr) 2014-10-22

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