EP0634219B1 - Procédé et dispositif de broyage de matériau avec une granulométrie variable - Google Patents

Procédé et dispositif de broyage de matériau avec une granulométrie variable Download PDF

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Publication number
EP0634219B1
EP0634219B1 EP94109122A EP94109122A EP0634219B1 EP 0634219 B1 EP0634219 B1 EP 0634219B1 EP 94109122 A EP94109122 A EP 94109122A EP 94109122 A EP94109122 A EP 94109122A EP 0634219 B1 EP0634219 B1 EP 0634219B1
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EP
European Patent Office
Prior art keywords
flow
grinding
oversize
fractions
removal
Prior art date
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Expired - Lifetime
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EP94109122A
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German (de)
English (en)
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EP0634219A1 (fr
Inventor
Horst Dipl.-Ing. Brundiek
Willy Dipl.-Ing. Lohle
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Loesche GmbH
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Loesche GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/30—Driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B02C2013/28609—Discharge means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a method for comminuting Material of different grit according to the generic term of claim 1 and a device, in particular for Implementation of the method according to the preamble of the claim 15.
  • EP 0 112 022 A2 which have a first, integrated classifier and a second Sifter outside of the roller mill. Via a discharge line is regrind-fluid mixture proportionately from the The grinding chamber is withdrawn and fed to the second classifier. By doing both coarse and fine goods removed and the second Sifters abandoned outside the mill and after sighting subjected to renewed grinding in the roller mill an optimized grain boundary distribution is to be achieved become.
  • DE-AS 1 152 297 is integrated in an airflow roller mill Classifier a fluid, e.g. Air or a gas, in a grinding room introduced.
  • the fluid is in an annular shape Space between the grinding bowl and the housing wall on one brought so high speed that essentially everyone thrown from the grinding bowl under centrifugal force Regrind particles, i.e. from feed piece size to finished grain size, captured by the fluid flow and as a two-phase mixture be transported to the sifter.
  • regrind particles are in the mill and the sifter Drying and pneumatic transport process removed, thus one of the numerous influencing factors which a influence complex dynamic grinding-sifter system, is changed.
  • the invention has for its object to provide a method and a device for shredding material, which leads to reduced energy consumption per metric ton of ground material and enables an increased throughput of the shredding device or shredding system.
  • the basic idea of the invention is to create an almost external grit flow essentially immediately to design the housing wall as a vented dense stream and at least partially remove its dead mass or dead material.
  • the method according to the invention consequently also sees the Saving pneumatic conveying energy by removing semolina from the grinding sight space to the flow resistance to reduce. Contrary to the known methods however, only those grains taken as dead mass or dead goods burden the grinding visual space because they do not continuously participate in the grinding and sighting process.
  • the resulting equilibrium conditions depend on the mass of the regrind particles. Regardless of the effect of a classifier, which one arranged integrated in an airflow mill or can be put on, due to a blade ring sighting of the regrind particles thrown outwards Grain separation solely through the use of a defined training and arranged gas guiding device and a vented dense stream is formed.
  • a return of the discharged is particularly expedient Semolina proportions after an external mechanical promotion in the Bypass around the airflow mill and the classifier, whereby the feed with a fresh material feed or separately from this can be done.
  • Particles of semolina can be obtained by the process according to the invention of the external semolina flow of 200% +/- 50%, based on the Finished product rate of the mill, or any one below it Percentage can be removed without the effectiveness of Shredding process and the sighting adversely affected becomes.
  • a continuous removal of the at the grinding and Visual process of uninvolved outside greetings leads to a continuous relief of the grinding visible space and to one Reduction of the flow energy to be used by approx. 30%. The one occurring in the previously known method Disadvantage that there are also enough ground particles are not removed from the grinding process.
  • a device for shredding material with a Airflow mill in particular for carrying out the method, sees one of a known blade ring in an annular space around a rotating grinding bowl trained gas guiding device for forming a rotational and circulation flow of the fluid delivery flow and at least one removal device in the area of the Airflow mill housing wall for for a tangential removal of a semolina portion of a external grit flow or the deaerated dense flow.
  • a preferred removal device is one in the mill and / or Sifter housing tangentially connected catch pocket, in which is under the influence of centrifugal force and gravity Collect rotating greetings on the wall and go through Be able to vent the dynamic pressure effect automatically.
  • the catch bag is expediently provided with an outlet connection provided, which opens into an airlock.
  • the semolina can be removed in the vented, compressed state, especially through Gravity, a mechanical conveyor, for example a bucket elevator.
  • This mechanical Conveyor can be equipped with a further shredding device connected.
  • the mechanical one is preferred Conveying device for returning the removed Semolina portions with a feed device for the feed material or directly with the grinding visible space or the grinding bowl connected for almost central feeding.
  • At least the mechanical conveyor partially the inner greens separated from the sifter and / or falling down over the grinding bowl Give up regrind particles and further comminution, especially the grinding bowl of the airflow roller mill, attributed.
  • the gas guide must be designed so that one from below the grinding bowl entering the airflow mill Fluid flow forced into a rotational flow or swirl flow is so that those thrown off the grinding bowl Grist particles in a helical path immediately can be transported upwards on the housing wall.
  • Fig. 1 is an airflow mill 4 with a grinding bowl 6 shown, on the grinding track 5 grinding rollers 7 frictionally roll or be driven separately. Above the grinding rollers 7 and in an integrated arrangement within a grinding visible space delimited by a housing wall 15 8, a classifier 29 with classifier rotor 24 is provided.
  • the material to be shredded with different grain sizes is supplied via a feed device, not shown Feed material 10 fed to the grinding path 5 almost in the middle.
  • a feed device not shown
  • Feed material 10 fed to the grinding path 5 almost in the middle.
  • annular space 14 formed in which a blade ring 16 from defined and arranged blades forms an annular gas guide device 19, the Flow channels 20 a flow 9 of a fluid, in particular of a gas, give an ejector effect.
  • the vented dense stream 17 is through a blade ring sighting that of the grinding track 5 to the annular gas guiding device 19 centrifuged, ground particles 13 formed.
  • This vented dense stream 17 is due the helical upward movement of the in the gas guide 19 generated flow swirl not in the direction Sifter 29 distracted.
  • After enrichment with regrind particles 13 acts by gravity, and together with one An ejector effect forms on each flow channel 20 Circulation flow 21, 22 about an almost vertical axis made by an internal upward flow 21 and a outer downflow 22 is marked.
  • This is in Wall area of the airflow mill 4 extending total flow is of limited radial extent and represents represents a particle torus.
  • the particle torus can be viewed as dead mass 23, which extend up to a certain radial extent thickened and then only in a flow space in the Suspended without losing ground and sighting to participate.
  • These shares come from from a circulation (arrows 40) within the grinding visible space 8.
  • a higher proportion flows due to the lower Partial pressure from above through the center of the airflow mill and with the shredded regrind flow over the Grinding track 5 to the edge of the grinding bowl 6.
  • a relatively small one Share is between the upward flow 40 and the Housing wall 18 sucked.
  • the centrifugal force of the vertical or Swirl flow is used to remove semolina external grit flow 18 exploited.
  • FIG. 2 and 3 is a highly schematic representation an arrangement and design of a removal device 25 shown in the upper region of the housing wall 15.
  • the removal device 25 is as a tangential to the Housing wall 15 arranged catch pocket 27 at the level of the classifier 29 trained.
  • the catch bag 27 has a slit-like Removal area 26 and one perpendicular to the removal area arranged drain opening 28 on the bottom on.
  • the almost slot-like removal area 26 of the removal device 25 is for the adjustable removal of the semolina with a adjustable baffle 31 provided, which via a vertical Pivot axis 32 is articulated on the housing wall 15.
  • the drain opening 28 can be analogous to the removal area 26 as adjustable Opening be formed.
  • the material to be shredded is different Grain is, for example in the form of a three-component mixture, fed to a feed device 38 and abandoned via an inlet port 39 of the airflow mill 4.
  • Grain is, for example in the form of a three-component mixture
  • feed material 10 semolina portions of the external grit flow 18 from a catch pocket 27 as a removal device 25 and with the help of a mechanical conveyor 36, for example a bucket elevator.
  • a mechanical conveyor 36 for example a bucket elevator.
  • regrind particles 33 in particular semolina, which over the annular gas guide device 19 (Fig. 1) down have failed, fed to the mechanical conveyor 36 and bypassing the airflow mill 4 abandoned.
  • the majority of the crushed regrind particles becomes a sighting with the help of the integrated classifier 29 fed.
  • the fine particles enter the fluid flow via a fine material discharge 11 into a filter 42, where the fluid, in particular a process gas, is separated from the fine material and via a fan 43 and optionally through a furnace 44 to a defined temperature preheated, is returned to the airflow mill 4.
  • the tangentially arranged removal device 25 is included an outlet port 34, optionally a metering discharge conveyor 41 and provided with an airlock 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Claims (16)

  1. Procédé de broyage de matériau présentant une granulométrie variable, dans lequel le matériau est chargé sur une piste de broyage (5) horizontale, tournante, d'une chambre de broyage-sélection (8) comportant une paroi d'enveloppe (15) et est broyé en particules, les particules de produit broyé sont soumises à un tri à l'aide d'un flux de fluide de transport (9) introduit à la périphérie de la piste de broyage (5), les particules fines de produit broyé sont extraites et une partie du broyat formant des particules grossières de produit est prélevée, et dans lequel un flux de broyat (18) extérieur est formé dans le voisinage de la paroi d'enveloppe (15) par les particules de produit broyé (13) éjectées par la force centrifuge au-delà du bord de la piste de broyage (5) et entraínées vers le haut dans un mouvement en hélice par le courant de fluide de transport (9), caractérisé par le fait que des fractions de broyat sont prélevées dans le flux de broyat extérieur (18), lequel forme un flux dense (17) pratiquement sans air et exempt de produits fins, par l'intermédiaire d'un dispositif (25) prévu dans la paroi d'enveloppe (15), au niveau du séparateur (29), sont acheminées vers un dispositif de transport (36) externe mécanique et sont chargées de nouveau sur la piste de broyage (5).
  2. Procédé selon la revendication 1, caractérisé par le fait que le prélèvement de fractions de broyat dans le flux de broyat (18) extérieur a lieu en continu.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que le prélèvement de broyat dans le flux de broyat (18) extérieur a lieu sans air.
  4. Procédé selon une des revendications précédentes, caractérisé par le fait que les fractions de broyat sont prélevées dans le flux de broyat extérieur (18) dans la direction tangentielle et sont collectées par action de la force centrifuge et de la pesanteur dans le dispositif (25).
  5. Procédé selon une des revendications précédentes, caractérisé par le fait que les tractions de broyat sont collectées dans le dispositif (25) par une pression dynamique et désaérées.
  6. Procédé selon une des revendications précédentes, caractérisé par le fait que les fractions de broyat sont prélevées dans le flux de broyat extérieur (18) en forme d'enveloppe et en une épaisseur réglable.
  7. Procédé selon une des revendications précédentes, caractérisé par le fait que les fractions de broyat prélevées dans le flux de broyat extérieur (18) sont réintroduites avec le produit de chargement (10) ou séparément sensiblement au centre de la piste de broyage tournante (5).
  8. Procédé selon une des revendications précédentes, caractérisé par le fait que le broyat intérieur est séparé du produit broyé à l'aide d'un sélecteur (29) et est évacué au moins partiellement de la chambre de broyage-sélection (8), au-dessus de la piste de broyage (5), et par le fait que le broyat intérieur ainsi que des fractions de broyat du flux extérieur (18) dense sont réintroduits sur la piste de broyage (5) à l'aide du dispositif de transport mécanique (36), par l'intermédiaire d'un circuit extérieur, à des fins de broyage supplémentaire.
  9. Dispositif pour le broyage de matériau comprenant un broyeur à circulation d'air (4) qui comporte, entre une cuve de broyage (6) tournante et une paroi d'enveloppe (15), comme dispositif d'introduction de gaz (19), une couronne à aubes (16) avec des canaux d'écoulement (20) pour un flux de fluide de transport (9) et, au-dessus de la cuve de broyage (6), un sélecteur (29), notamment pour la mise en oeuvre du procédé selon une des revendications 1 à 8, caractérisé par le fait qu'au moins un dispositif de prélèvement (25) pour le prélèvement de fractions de broyat dans un flux de broyat extérieur (18) est prévu dans la paroi d'enveloppe (15), au niveau du sélecteur (29), que le dispositif de prélèvement (25) est connecté à un dispositif de transport mécanique (36) et que celui-ci est connecté à un dispositif de chargement (38) pour le produit de chargement (10) aux fins de réintroduire dans la cuve de broyage (6) les fractions de broyat prélevées dans le flux de broyat extérieur (18).
  10. Dispositif selon la revendication 9, caractérisé par le fait que le dispositif de prélèvement (25) est agencé sous la forme d'une chambre de captage (27) disposée tangentiellement dans la paroi d'enveloppe (15), avec des canaux d'écoulement (20).
  11. Dispositif selon la revendication 10, caractérisé par le fait que la chambre de captage (27) disposée tangentiellement comporte une zone de prélèvement (26) sensiblement en forme de fente et un orifice d'écoulement (28) côté fond.
  12. Dispositif selon la revendication 11, caractérisé par le fait que la zone de prélèvement (26) et/ou l'orifice d'écoulement (28) sont configurés de manière à permettre le réglage du prélèvement de fractions de broyat.
  13. Dispositif selon la revendication 12, caractérisé par le fait que la zone de prélèvement (26) est réglable à l'aide d'une tôle déflectrice (31).
  14. Dispositif selon la revendication 13, caractérisé par le fait que la tôle déflectrice (31) est disposée sur la paroi d'enveloppe (15) et peut pivoter autour d'un axe vertical (32).
  15. Dispositif selon une des revendications 10 à 14, caractérisé par le fait que la chambre de captage (27) est pourvue d'un conduit de sortie (34) et d'une écluse à air (37).
  16. Dispositif selon une des revendications 9 à 15, caractérisé par le fait que des broyats intérieurs (30) et/ou des particules de produit à broyer (33) qui tombent de la cuve de broyage (6) sont envoyés au dispositif de transport mécanique (36).
EP94109122A 1993-07-14 1994-06-14 Procédé et dispositif de broyage de matériau avec une granulométrie variable Expired - Lifetime EP0634219B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4323587 1993-07-14
DE4323587A DE4323587C2 (de) 1993-07-14 1993-07-14 Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung

Publications (2)

Publication Number Publication Date
EP0634219A1 EP0634219A1 (fr) 1995-01-18
EP0634219B1 true EP0634219B1 (fr) 1999-09-15

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EP94109122A Expired - Lifetime EP0634219B1 (fr) 1993-07-14 1994-06-14 Procédé et dispositif de broyage de matériau avec une granulométrie variable

Country Status (13)

Country Link
US (1) US5531388A (fr)
EP (1) EP0634219B1 (fr)
JP (1) JPH07163895A (fr)
KR (1) KR950002859A (fr)
CN (1) CN1122730A (fr)
AT (1) ATE184508T1 (fr)
CA (1) CA2127389A1 (fr)
DE (2) DE4323587C2 (fr)
DK (1) DK0634219T3 (fr)
ES (1) ES2138636T3 (fr)
TW (1) TW302298B (fr)
VN (1) VN339A1 (fr)
ZA (1) ZA944315B (fr)

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CN108100674B (zh) * 2017-11-28 2024-04-30 佛山科学技术学院 一种化工原料吸取器
CN109847888B (zh) * 2017-11-30 2021-01-22 曾金穗 粉体干式微细化装置
WO2020254538A2 (fr) * 2019-06-21 2020-12-24 Librixer Ab Broyeur librixer et système de classificateur pneumatique de particules
CN111052918B (zh) * 2019-12-03 2024-02-13 农业农村部南京农业机械化研究所 一种有序抛秧机气力定植立苗系统及方法
JP7409140B2 (ja) * 2020-02-18 2024-01-09 株式会社Ihi 竪型ローラミル
CN111450970B (zh) * 2020-04-13 2021-03-09 青岛理工大学 同腔集成立式核桃壳高速多级超微粉碎装置及方法
CN113731549B (zh) * 2020-05-28 2022-12-06 临沂会宝岭铁矿有限公司 一种立磨机预选系统
CN113457792B (zh) * 2021-07-20 2022-06-21 天津水泥工业设计研究院有限公司 一种立式辊磨选粉机回料控制装置设计方法
CN114733614B (zh) * 2022-05-26 2023-12-12 淄博大力矿山机械有限公司 无轴高效轮碾制粉机

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JPS59147648A (ja) * 1983-02-10 1984-08-24 ホソカワミクロン株式会社 竪型粉砕分級装置
DE8425837U1 (de) * 1984-08-31 1984-11-22 Krupp Polysius Ag, 4720 Beckum Wälzmühle
DE3515444A1 (de) * 1985-04-29 1986-10-30 Claudius Peters Ag, 2000 Hamburg Waelzmuehle
GB2214106B (en) * 1987-12-24 1991-06-26 Smidth & Co As F L Vertical roller mill
DE3801229A1 (de) * 1988-01-18 1989-07-27 Krupp Polysius Ag Mahlverfahren sowie mahlanlage
US5251831A (en) * 1991-01-21 1993-10-12 Mitsubishi Jukogyo Kabushiki Kaisha Roller mill
DE4124416A1 (de) * 1991-07-23 1993-01-28 Krupp Polysius Ag Einrichtung und verfahren zur zerkleinerung von mahlgut unterschiedlicher koernung

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DE4323587C2 (de) 1996-07-18
KR950002859A (ko) 1995-02-16
ES2138636T3 (es) 2000-01-16
DE4323587A1 (de) 1995-01-19
CA2127389A1 (fr) 1995-01-15
ATE184508T1 (de) 1999-10-15
TW302298B (fr) 1997-04-11
CN1122730A (zh) 1996-05-22
DK0634219T3 (da) 2000-04-03
US5531388A (en) 1996-07-02
JPH07163895A (ja) 1995-06-27
DE59408740D1 (de) 1999-10-21
VN339A1 (en) 1997-04-25
EP0634219A1 (fr) 1995-01-18
ZA944315B (en) 1995-02-13

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