EP2207619B1 - Procédé et dispositif de prébroyage et de broyage de finition de matières minérales et non minérales - Google Patents

Procédé et dispositif de prébroyage et de broyage de finition de matières minérales et non minérales Download PDF

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Publication number
EP2207619B1
EP2207619B1 EP08804515.8A EP08804515A EP2207619B1 EP 2207619 B1 EP2207619 B1 EP 2207619B1 EP 08804515 A EP08804515 A EP 08804515A EP 2207619 B1 EP2207619 B1 EP 2207619B1
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EP
European Patent Office
Prior art keywords
roller
grinding
speed
lower roller
driven
Prior art date
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EP08804515.8A
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German (de)
English (en)
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EP2207619A1 (fr
Inventor
Ali Memari Fard
Fritz Feige
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Memari Fard Nima
Memari Fard Petra
Memari Fard Ramin
Original Assignee
Memari Fard Nima
Memari Fard Petra
Memari Fard Ramin
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Priority to PL08804515T priority Critical patent/PL2207619T3/pl
Publication of EP2207619A1 publication Critical patent/EP2207619A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/42—Driving mechanisms; Roller speed control

Definitions

  • the invention relates to a method for pre and final grinding of mineral and non-mineral materials with the features mentioned in the preamble of claim 1 and an associated device with the features mentioned in the preamble of claim 8.
  • the pre-grinding and finish-grinding of preferably hard and brittle materials traditionally takes place in ball mills and more recently with increasing trend in vertical roller mills as well as in high-pressure roller mills.
  • the high-pressure roller mill works with very high pressures, which are only conditionally adjustable and lead to a complex and very heavy machine design.
  • the high-pressure roller mill has an unfavorable throughput speed behavior.
  • the flow rate characteristic of the high pressure roller mill is non-linear, i. Depending on the material properties and on the geometry of the stress surfaces, the throughput increases with increasing peripheral speed. sharply lower with a simultaneous increase in specific energy requirements. Large throughputs are therefore only possible by broadening the grinding rollers with a proportional increase in pressing forces, but this is limited by machine technology.
  • the material injection of a prepared on a rotating slat strip material layer requires great technical effort, since the slat strip must be designed for the high compressive stresses in the stress zone, which to control the wear of both the traction device and the plating and also to limit noise pollution significant speed and throughput reductions must be accepted.
  • From the DE 38 23 929 A1 is a roller press with a drive roller and two smaller staggered idler rollers known.
  • the ground material falls from the discharge end of a conveyor belt in the through the drive roller and the first idler roller formed nip.
  • the material to be ground can also be conveyed into the nip by means of a downpipe.
  • the compressed material to be ground is then mixed with recycled material and then the second nip, which is formed from the drive roller and the second idler roller, fed, whereby the product is ground to the desired product fineness.
  • the grinding pressures are adjustable to values of between 50 and 600 MPa.
  • From the DE 28 30 864 A1 is a roller mill with a hard roller, a vertically offset play roller and a material application device known, wherein the defined by the centers of the two rolls line with the horizontal forms an angle of between 35 and 75 degrees.
  • the discharge-side end of the crop-feeding device is located above the uppermost peripheral region of the lower-mounted fixed roller.
  • a slider is used to adjust the height of the material layer, which is fed to the nip.
  • the material application device can have at least one movable element which gives the material to be ground a component of movement in the direction of the roll movement, so that the material to be ground reaches the circumferential speed of the roller more quickly.
  • Next is from the FR 1 058 697 A a grinding device or method according to the preamble of claim 8 or claim 1 known.
  • the object of the invention is to provide a method and associated apparatus for pre- and final grinding of mineral and non-mineral materials, such as e.g. Limestone, cement clinker, blastfurnace slag, old concrete or ashes, which / is characterized by a high energy efficiency and low mechanical construction, maintenance and repair costs, can be used in a wide range for the crushing of different materials and a linear throughput -Speed behavior in both part-load and high mass flow conditions. realized.
  • mineral and non-mineral materials such as e.g. Limestone, cement clinker, blastfurnace slag, old concrete or ashes
  • the regrind which as a rule consists of fresh material and circulating material, is fed from a material feed belonging to the comminution device as a defined and laterally bounded material layer with a predetermined thickness in the region of the top of the driven, lower roller, accelerated to roller speed and continuously into the gap , which is formed with the offset above the driven roller upper roller, transported, hydropneumatically using specific compressive forces of 2 to 7.5 kN / mm (force / length of the nip) claimed and then by a preferably fast-running impact rotor within the Disintegrator disagglomerated.
  • the deagglomerator can then be dispensed with if the new comminution device, e.g. as Vormühle in conjunction with a ball mill, is connected.
  • the device consists of two superimposed rollers, of which only the lower roller or both rollers are driven.
  • the upper roller is vertically offset from the lower roller and is hydro-pneumatically applied to the material occupied load surface of the lower roller.
  • the feeding device can already impart to the millbase a component of motion in the direction of rotation of the hard roller, wherein the grinding path speed of the hard roller is preferably between 3% and 5% higher than the speed of the abandoned millbase.
  • the claimed material which emerges more or less agglomerated from the roller gap, is finally fed to a directly downstream deagglomerator.
  • the upper roller by its own drive Approaching the grinding device can be additionally accelerated, or moved during the grinding process at a different speed than the lower roller, so that an additional shear force is exerted by the relative movement of the two rollers on the ground material.
  • the upper roller is arranged offset by 60 to 90 degrees, more preferably by 80 degrees to the horizontal against the direction of rotation of the lower roller.
  • the stress of the material layer is made using adjustable specific grinding forces of 2 to 7.5 kN / mm and more preferably 4 to 7 kN / mm (force / length of the nip).
  • the proportion of material with oversize size is preferably returned to the comminution process, the mass flow of the circulating product being kept constant by regulation of the fresh material fed to the grinding process.
  • the grinding force transmitted with the upper roll can be regulated during the milling process.
  • a mass flow proportional to the peripheral speed of the rollers is supplied with an approximately constant layer thickness in the apex region of the lower roller.
  • the upper roll is set at a certain zero gap on the lower roll.
  • the hot gas supplied for the purpose of pre-shredding and drying moist feed material into a pre-shredder is subsequently utilized as a classifying air in the classifier.
  • the circulating material is admixed with the roller gap Fresh food supplied.
  • the mass flow of the circulating material is measured via a continuous measuring device integrated in a bucket elevator.
  • the thickness of the material layer is continuously measured and visualized before its use in the roller gap during operation.
  • the material feeding device comprises a roller or feeder provided at the outlet and infinitely variable in its speed.
  • the diameter ratio of the driven lower roll to the upper roll is 1.0 to 2.0, and more preferably 1.0 to 1.5.
  • the lower roller is connected via a lever system with at least one hydraulic cylinder.
  • the material feed and discharge device arranged in the apex region above the lower roll preferably consists of a material feed container controlled by a filling level with a rotating feed device, for example a roll feeder, arranged on the material outlet.
  • the material layer exchangeable shelves are arranged on both sides of the end faces of the lower roller for lateral delimitation of the material layer exchangeable shelves.
  • the shelves can be segmented.
  • the stress surfaces of the rollers are wear-resistant and structured by build-up welding or mechanical machining.
  • the driven lower roller is mounted in bearing bodies and arranged horizontally displaceable together with the front-side housing part.
  • the roller feeder is resiliently mounted in a height-adjustable rocker for adjusting the layer thickness of the material layer.
  • the feed hopper is followed by a continuously variable in its speed Zellenradaufgeber on the material outlet side of a Vorbunker with a Schichtdickeneinsteller is arranged.
  • one or more overhung cleaning worms are arranged side by side to avoid caking and clogging over the sloping discharge wall of combined with a roll feeder material feed container.
  • the drive of the upper roller serves to accelerate the start-up of the roller mill, especially in large and heavy equipment. It is thereby also possible to selectively run the pressure roller during the grinding process slower than the hard roller, whereby the material to be ground in addition to the vertical roller pressure still undergoes a horizontal shear pressure component.
  • the solution according to the invention which realizes these features, has numerous other advantages over the known high-pressure roller mill and belt roller mill.
  • the advantages of the new crusher known as a beta roller mill, consist in the fact that specific grind forces of up to 7.5 kN / mm can be set arbitrarily, depending on the material as well as on the grinding task to be solved, and with the parameters of the specific crusher Grinding force and the material layer thickness, the crushing result can be set independently of the roller speed and kept constant. It has particularly in the fine grinding of hard and brittle materials such. Cement clinker and slag sands proved to be advantageous to perform the stress using high specific grinding forces whenever a particularly high-quality finished product in the circuit with a sifter should be produced economically at the lowest possible circulation rates.
  • the device according to the invention can process soft materials with a throughput of up to 500 t / h and hard materials with a throughput of up to 130 t / h.
  • FIG. 1 shows a schematic representation of the crushing device according to the invention, consisting of two horizontally mounted and offset superposed rollers 1 and 2, an integrated deagglomerator 10 and a consisting of a material feed container 3 and a roll feeder 9 material feeding and discharge.
  • the lower roll 1 is according to the in FIG. 1 shown Pfeilraum.angetrieben.
  • the upper roller 2 is made hydro-pneumatically by means of a hydraulic cylinder 7 against the roller 1 via a lever system 6.
  • the upper roller 2 is frictionally engaged by the material occupied surface of the driven roller 1 or may have its own drive.
  • the diameter ratio of the lower roller 1 to the upper roller 2 is preferably 1.0 to 2.0, and more preferably 1.0 to 1.5.
  • the material feeding and discharging device In the region of the vertex of the driven lower roller 1, the material feeding and discharging device is arranged.
  • the millbase which is in a level controlled container 3, passes as a defined material layer 4 with a predetermined thickness on the laterally delimited by screwed shelves 45 stress surface 11 of the driven roller 1, accelerated to peripheral speed and continuously in by both rollers 1 and 2 formed stress or roller gap 5 to be transported.
  • a roll feeder 9 downstream of the material feed container 3 and variable in its rotational speed, via the oscillating support of which any desired material layer thickness can be set, ensures that the stress or roll gap 5 is supplied with a velocity-proportional mass flow of approximately constant layer thickness at all times.
  • the bearings are preferably positioned on the extended horizontal center line of the lower roller 1, it being noted that not in all crushing tasks a deagglomerator is necessary.
  • one or two hydraulic cylinders 7 are used, to which the nitrogen containers 8 for system damping are also directly connected.
  • FIG. 2 graphically compares the development of throughput and specific energy requirements of vertical roller mill 12, high-pressure roller mill 13, belt roller mill 14 and beta roller mill 15 according to the invention as a function of the grinding path speed. While a vertical roller mill 12 depending on the Mahlteller tomesser and the geometry of their grinding tools selectively, ie only at a single operating point and only at a very specific speed, the maximum throughput at In the case of the other mills, in principle, the grinding path speed is also available as a parameter for changing the throughput.
  • the speed-proportional change in throughput is limited in the high-pressure roller mill 13 and belt roller mill 14. Due to the complicated balance of forces resulting from the use of a level-controlled material overflow, the high-pressure roller mill 13, depending on the structuring of the stress surfaces and the material to be stressed, assumes a more or less declining throughput speed behavior already at roller speeds of 1.0 m / s , Since this behavior is also associated with a progressive increase in the specific energy requirement, in the high-pressure roller mill 13, the peripheral speeds are limited to 1.0 to 1.5 m / s for purely economic reasons.
  • the belt roller mill 14 is not able to operate in a wide speed range can.
  • both the link chains used as tension members and the slat band itself are technically no longer manageable because of their system-inherent co-loading at speeds above 1.0 m / s.
  • beta-roller mill 15 crushing device that dispenses with the use of a drawn, endless plate belt and with the help of a corresponding task and discharge the material in the area of the apex of the driven, lower roller 1 gives, however, both the technical as also be operated from the economic point of view with direct proportionality of roller peripheral speed and throughput in a wide speed range up to peripheral speeds of 3.0 m / s and beyond.
  • Energy consumption which is about 50% lower than the vertical roller mill 12
  • the beta roller mill 15 due to their low mechanical losses in a position even the already good to be designated as energy utilization of the belt roller mill 15 again by the To improve factor 1.35.
  • FIG. 3 shows a Kreislaufmahlstrom with beta roller mill in the flow sheet, as it could be used for cement grinding or grinding of a comparable product for example.
  • both the disagglomerator 10 and the material feeding and discharging, consisting of a level controlled feed container 3 and a variable speed roller feeder 9 are fully integrated into the crushing device.
  • the fresh material 16 shown in the drawing only for a material component, is withdrawn by a Dosierbandwaage 18 from a dosing hopper 17 and abandoned for reasons of better mixing of Frischgut 16 with the Umlaufgut 19 behind the crushing a bucket elevator 20, which is preferably designed U-shaped and waiving further conveyors, the cycle material directly a sifter 21, preferably a high-performance classifier, feeds.
  • the classifier 21 preferably separates the finished product contained in the outgoing classifying air 24 directly into a fabric separator, which is not shown in greater detail in the drawing.
  • the grinding system is controlled to maintain a constant circulating mass flow, wherein the change in the quality of the final product takes place via the adjustment of the specific classifying air quantity 25 and via the rotational speed of a classifying basket 26 arranged in the classifier 21.
  • the circulating mass flow is continuously measured via a continuous measuring device 27 integrated in the bucket elevator 20.
  • FIG. 4 shows the flowsheet of a Kreislaufmahlstrom, such as the Grinding of dried blastfurnace slags could be used.
  • the task of fresh material 16 realized by means of metering belt scale 18 takes place in this variant directly into the material feed container 3 of the beta roller mill.
  • a Zweiwegeschurre 28 In the material path from the bucket elevator 20 to the classifier 21 is a Zweiwegeschurre 28, so that from time to time the Umlaufgut 19 via a Trommelmagnetabscheider 29, in which a deposition of enriched Eisenein Whyn takes place, is diverted directly into the dosing hopper 17 for the fresh 16.
  • the foreign iron parts in the fresh material 16 are discharged via a magnetic separator 30 above the feeder belt balance 18.
  • the fresh material supply to the beta roller mill is controlled by the level of the material in the material feed container 3.
  • the circulation mass flow 19 is analog FIG. 3 Measured via an integrated in the bucket elevator 20 throughput measuring device 27.
  • FIG. 5 shows the flowsheet of FIG. 4 , supplemented by a riser dryer 31 and a cyclone separator 32.
  • the riser dryer 31 the drying of fine-grained and pneumatically conveyable materials, such as moist granulated slags.
  • the moist fresh material 16 is metered into the hot or exhaust 33 charged riser dryer 31 via a gas-tight rotary valve 22 and after a drying process lasting only a few seconds, the dried blast furnace slag is arranged by the cyclone separator 32, eg above the bucket elevator 20 is, the Umlaufgut 19 fed to the classifier 21.
  • the exhaust gas 35 from the cyclone separator 32 is then either dedusted directly in the tissue separator provided for the prepare for the preparation of a certain drying in the guided in the air circulation classifying air 24 of the classifier 21 are involved.
  • FIG. 6 shows the flow sheet of a Kreislaufmahlstrom with drying and pre-crushing of the fresh material 19 in a heated impact hammer mill 36.
  • This works in conjunction with a riser dryer 31, the pre-shredded and pre-dried Feeding a sifter 21, for example, a high-performance separator, fed pneumatically from below, while its application by the Umlaufgut 19 via the bucket elevator 20 is mechanically from above.
  • a Z-shaped bucket elevator 20 is used.
  • the semolina transport from classifier 21 to the material supply container 3 takes over a screw conveyor 38.
  • the fresh 16 is metered the impact hammer mill 36 via a conveyor chain 37.
  • FIG. 7 shows in a simplified structural representation of the device according to the invention with integrated deagglomerator 10 and material feed container 3 with roller feeder 9 in side view.
  • the lower driven roller 1 is mounted in a vibration-resistant and machined, consisting essentially of two lateral walls, machine frame 39 and can be solved by loosening flange complete with the square bearing bodies 40 and the front housing part 41 for repair or Purpose of a hardfacing of the stress surfaces 11 are moved horizontally.
  • the roller bearings are also the bearings of the disagglomerator 10, whose impact circle distance to the stress surface 11 of the lower roller 1 is adjustable, while the stress surface 11 of the upper roller 2 is also used as a baffle.
  • the drive roller 1 - not shown in the drawing is preferably driven via a gear coupling and bevel gear, which is located together with the variable speed drive motor on a support structure separate from the machine frame, which is also variable speed drive of the disagglomerator 10 with the machine frame 39th firmly connected.
  • the machine frame 39 can be designed in height so that below the drive roller 1 nor a cleaning conveyor, such as a screw or Scratch conveyor, place finds.
  • the hydro-pneumatically employed to the drive roller 1 upper roller 2, preferably smaller in diameter than the driven roller 1, is mounted horizontally in a rigid support 42 which is connected via a pin bearing 43 on the side walls of the machine frame 39 and a lever system 6 is made depending on the size of the machine by one or two hydraulic cylinders 7 on the material-driven roller 1.
  • the hydraulic cylinders 7 are, advantageously connected to the nitrogen vessels 8, integrated in the machine frame 39 and easily accessible from the front side.
  • the upper roller 2 is covered by a lightweight cover 44, which can be unfolded and advantageously leaves an area towards the material feed container 3 with roller feeder 9 to the direct view and installation of appropriate measurement both the material flow and the layer thickness on the material occupied To be able to control the load area of roll 1.
  • the material feed container 3 is mounted with the roller feeder 9 on the side walls of the machine frame 39.
  • FIG. 8 shows a variant of the material application and discharge device according to the invention.
  • the material flows in the apex of the lower, driven roller 1 on the laterally screwed Borden 45 limited stress surface 11 and is accelerated by a roller feeder 9 to the peripheral speed of the driven roller 1, as laterally limited material layer 4 with a predetermined thickness prepared, slightly compressed and superficially smoothed transported in the formed from the upper roller 2 and lower roller 1 roller or stress nip 5.
  • the tread 46 is preferably structured by a toothing or a build-up welding, sitting on a rocker 47 which is mounted on the rear wall of the material feed container 3 and on the inclination change the desired feed layer thickness 4, eg 25 bis 30 mm for a granulated blastfurnace slag and 45 to 50 mm for a dry-hearth clinker, which can be set to the nearest millimeter.
  • the oscillating bearing is designed so that the roller feeder 9 can increase the set layer thickness instantly against an adjustable spring system 51, if, for example, should be a particle with oversized edge length or a foreign body in the material task.
  • the roller feeder 9 is driven via a chain or toothed belt drive 48 by a geared motor 49, which is arranged on the other end of the rocker 47.
  • a geared motor 49 which is arranged on the other end of the rocker 47.
  • one or more juxtaposed cleaning screws 50 can be used over the inclined wall surface of the material feed container 3 depending on the size of the system.
  • the material feed container 3 is acted upon as a pre-mill or final mill and, depending on the point of delivery of the fresh product 19, by a weigh feeder 18, by a rotary feeder 22 or by the combined use of both equipment.
  • the residence time of the material in the feed container 3 is in the lower minute or upper seconds range, which is to ensure that the material content is always in motion and the Walzenaufgeber 9 by a sufficient supply of material required for the material feed or stress process material layer 4 with Prepared layer thickness can prepare speed proportional.
  • FIG. 9 shows a further variant of the material application and discharge device according to the invention, in which a variable speed Zellenradaufgeber 34 is used as a discharge organ.
  • the Zellenradaufgeber 34 is preceded on its discharge a small Vorbunker 52 as a material buffer, which is provided with a resilient Schichtdickeneinsteller 53.
  • the use of the cellular wheel feeder 34 is also suitable as a discharge member to a hopper 3 with a larger capacity. The feeder is advantageously driven directly.
  • FIG. 10 shows a preferred embodiment of the invention.
  • the upper roller is arranged offset by an angle of about 80 degrees to the horizontal opposite to the direction of rotation of the lower roller.
  • the discharge-side end of the feeding device is not directly above, but arranged in the direction of rotation of the lower roller slightly in front of the apex of the lower roller. Otherwise, the structure of this embodiment substantially corresponds to that in FIG Fig. 1 described crushing device.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Claims (15)

  1. Procédé de pré-broyage et de broyage de finition de matières minérales et non minérales, de préférence de matières dures et cassantes telles que par ex. calcaire, clinker de ciment, laitier de haut fourneau, vieux béton ou cendres, où le concassage s'effectue sous l'effort de compression dans l'intervalle (5) formé entre un rouleau inférieur entraîné (1) et un rouleau supérieur (2),
    où le rouleau inférieur (1) reçoit une quantité ajustable de la matière à traiter selon un facteur de vitesse dans le sens de rotation du rouleau inférieur (1), la matière est accélérée à la vitesse circonférentielle du rouleau inférieur (1) et acheminée à fin de concassage dans l'intervalle (5) formé entre les deux rouleaux (1 ; 2), excentré en face de l'alimentation en matière à la périphérie du rouleau inférieur (1), et
    où le rouleau supérieur (2) est disposé élastiquement de façon hydropneumatique sur le rouleau inférieur entraîné (1) avec une force de compression ajustable et est entraîné sous l'effet du frottement avec la couche de matière (4) ou est muni de son propre dispositif d'entraînement,
    caractérisé en ce que
    la quantité ajustable de matière à traiter est alimentée au niveau du sommet du rouleau inférieur (1) sous forme de couche de matière (4) limitée latéralement, aplatie sur le dessus et d'une épaisseur ajustable, et
    la vitesse de broyage du rouleau inférieur (1) est supérieure de 3-5% au débit d'alimentation de la matière à broyer.
  2. Procédé selon la revendication 1, où le rouleau supérieur (2) à la mise en marche du dispositif de broyage est en outre accéléré par son propre entraînement ou est entraîné durant le processus de broyage à une vitesse différente de celle du rouleau inférieur (1), de telle sorte que le mouvement relatif des deux rouleaux (1, 2) impose une force supplémentaire de cisaillement sur la matière à broyer.
  3. Procédé selon l'une des revendications précédentes, où la ligne de jonction entre les axes des deux rouleaux forme avec l'horizontale un angle de 60 à 90 degrés, de préférence d'environ 80 degrés.
  4. Procédé selon l'une des revendications précédentes, où dans le cadre du maintien d'une épaisseur maximale possible de la couche de matière (4) le débit de la matière à travers l'intervalle (5) entre les rouleaux est réglé par un ajustement continu de la vitesse circonférentielle du rouleau inférieur (1).
  5. Procédé selon l'une des revendications précédentes, où lors d'un broyage de finition la partie de matière comportant des grains trop gros est renvoyée vers le processus de concassage, où le débit de masse de la matière en circulation (19) est maintenu constant grâce au réglage de l'alimentation du processus de broyage en nouvelle matière (16).
  6. Procédé selon l'une des revendications précédentes, où la force de broyage appliquée par le rouleau supérieur (2) est réglé de façon contrôlée durant le processus de broyage en fonction des caractéristiques de la matière et du résultat de concassage souhaité.
  7. Procédé selon l'une des revendications précédentes, où un gaz chauffant (33) introduit dans un pré-broyeur (36) à des fins de pré-broyage et de séchage de la matière alimentée à l'état humide est ensuite exploité comme air de séparation (25) dans le séparateur (21).
  8. Dispositif de pré-broyage et broyage de finition de matières minérales et non minérales, de préférence de matières dures et cassantes telles que par ex. calcaire, clinker de ciment, laitier de haut fourneau, vieux béton ou cendres,
    avec un dispositif de concassage qui présente un rouleau inférieur entraîné (1) et un rouleau supérieur (2), disposés à l'horizontale, l'un au-dessus de l'autre et l'un décalé par rapport à l'autre et formant un intervalle (5) entre rouleaux, où le rouleau inférieur (1) est entraîné à une vitesse de broyage, et
    avec un dispositif d'alimentation (9, 34) qui alimente la matière à broyer sur le rouleau inférieur (1) déjà selon un facteur de vitesse dans le sens de rotation du rouleau inférieur (1),
    caractérisé en ce que
    des moyens sont prévus permettant de décharger la quantité ajustable de matière à traiter au niveau du sommet du rouleau inférieur (1) sous forme de couche de matière (4) limitée latéralement, aplatie sur le dessus et d'une épaisseur ajustable, et
    la vitesse de broyage du rouleau inférieur (1) est supérieure de 3-5% au débit d'alimentation de la matière à broyer.
  9. Dispositif selon la revendication 8, où le rouleau supérieur (2) agencé de manière excentrée est muni de son propre dispositif d'entraînement et la ligne de jonction entre les axes des deux rouleaux forme avec l'horizontale un angle de 60 à 90 degrés, de préférence d'environ 80 degrés.
  10. Dispositif selon l'une des revendications 8 et 9, où afin de produire la force de broyage le rouleau (2) est relié par un système à levier (6) à au moins un cylindre hydraulique (7).
  11. Dispositif selon l'une des revendications 8 à 10, où un équipement d'alimentation et de déversement de la matière disposée au niveau du sommet au-dessus du rouleau (1) se compose d'un conteneur d'alimentation en matière (3) contrôlé en fonction du niveau de remplissage muni d'un dispositif rotatif d'introduction disposé à la sortie de la matière, par exemple d'un cylindre chargeur (9).
  12. Dispositif selon l'une des revendications 8 à 11, où le rouleau inférieur entraîné (1) repose sur des paliers (40) et est agencé de façon coulissante à l'horizontale sur l'avant du bâti du dispositif (41).
  13. Dispositif selon l'une des revendications 8 à 12, où le cylindre chargeur (9) est installé élastiquement de préférence dans un support basculant (47) réglable en hauteur afin d'ajuster l'épaisseur de la couche de matière (4).
  14. Dispositif selon l'une des revendications 8 à 13, où est installé en aval du conteneur d'alimentation en matière (3) un déchargeur rotatif (34) de rotation ajustable en continu, à la sortie de matière duquel est disposé un pré-conteneur (52) comportant un dispositif de réglage de l'épaisseur de couche (53).
  15. Dispositif selon l'une des revendications 8 à 14, où, afin d'éviter les colmatages et engorgements, une ou plusieurs vis de nettoyage (50) montées flottantes sont disposées l'une à côté de l'autre au-dessus de la paroi oblique de déversement du conteneur d'alimentation en matière (3) combiné à un cylindre chargeur (9).
EP08804515.8A 2007-09-22 2008-09-22 Procédé et dispositif de prébroyage et de broyage de finition de matières minérales et non minérales Active EP2207619B1 (fr)

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PL08804515T PL2207619T3 (pl) 2007-09-22 2008-09-22 Sposób i urządzenie do mielenia wstępnego i dokładnego materiałów mineralnych i niemineralnych

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DE102007045373A DE102007045373A1 (de) 2007-09-22 2007-09-22 Verfahren und Vorrichtung zur Vor- und Fertigmahlung von mineralischen und nichtmineralischen Materialien
PCT/EP2008/062588 WO2009037356A1 (fr) 2007-09-22 2008-09-22 Procédé et dispositif de prébroyage et de broyage de finition de matières minérales et non minérales

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JP2010538830A (ja) 2010-12-16
JP5409634B2 (ja) 2014-02-05
PL2207619T3 (pl) 2014-05-30
CN101918139B (zh) 2012-11-21
US8292207B2 (en) 2012-10-23
AU2008300496A1 (en) 2009-03-26
CA2700071A1 (fr) 2009-03-26
AU2008300496B2 (en) 2013-02-21
ES2451690T3 (es) 2014-03-28
EP2207619A1 (fr) 2010-07-21
HK1150994A1 (en) 2012-01-20
ZA201002168B (en) 2011-05-25
US20100301145A1 (en) 2010-12-02
CA2700071C (fr) 2015-12-01
CN101918139A (zh) 2010-12-15
WO2009037356A1 (fr) 2009-03-26
DE102007045373A1 (de) 2009-04-02
DK2207619T3 (da) 2014-02-10

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