EP0209663A1 - Procédé et installation pour le broyage fin des matériaux - Google Patents

Procédé et installation pour le broyage fin des matériaux Download PDF

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Publication number
EP0209663A1
EP0209663A1 EP19860106698 EP86106698A EP0209663A1 EP 0209663 A1 EP0209663 A1 EP 0209663A1 EP 19860106698 EP19860106698 EP 19860106698 EP 86106698 A EP86106698 A EP 86106698A EP 0209663 A1 EP0209663 A1 EP 0209663A1
Authority
EP
European Patent Office
Prior art keywords
air
classifier
stage
exhaust air
classifying
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.)
Withdrawn
Application number
EP19860106698
Other languages
German (de)
English (en)
Inventor
Heinrich Dipl.-Ing. Henne
Gotthardt Dipl.-Ing. Blasczyk
Hubert Dipl.-Ing. Eickholt
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0209663A1 publication Critical patent/EP0209663A1/fr
Withdrawn legal-status Critical Current

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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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
    • B02C17/189—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone with return of oversize material to crushing zone

Definitions

  • the invention relates to a method according to the preamble of claim 1, furthermore a system for performing this method.
  • the dust-containing exhaust air from the mill is conveyed by means of a separate fan and dedusted in a separate filter.
  • the invention has for its object to provide a method of the type required in the preamble of claim 1 so that a high degree of selectivity of the sighting and good cooling of the finished goods can be achieved with a simultaneous simplification of the process and with a reduction in the technical complexity of the plant.
  • the viewing stage is operated with a single passage of the viewing air.
  • the visible air consists of the exhaust air from the grinding stage and additional fresh air.
  • the dedusting of the exhaust air from the grinding stage can be carried out together with the separation of the fine material from the classifying air in a single, common separation stage.
  • the mill and classifier are given a common separating device and a common fan.
  • the method according to the invention therefore offers itself especially where there is insufficient space to accommodate separating cyclones and a circulating air fan on the circumference or in the immediate vicinity of a circulating air classifier.
  • the method according to the invention allows the separating device and the system fan to be arranged, if necessary, at a somewhat greater distance from the classifier.
  • the method according to the invention is also particularly important when the finished goods are to be largely cooled in a simple manner. Since a large part of the classifying air consists of fresh air in the method according to the invention, the classifying material can be cooled effectively. Of particular advantage here is the substantial improvement in the efficiency of the screening, which results from the fact that a significant proportion of the viewing air, namely the fresh air portion, is dust-free.
  • a swirl is applied to the exhaust air from the grinding stage immediately before it enters the viewing stage, which has the same direction of rotation as the swirl of the fresh air mixing with the exhaust air from the grinding stage.
  • the selectivity of the sighting can be further improved according to the invention in that additional swirl amplification of the classifying air also occurs the air outlet side of the viewing area.
  • the classifier grinding system shown in FIG. 1 contains a mill 1 forming the grinding stage, a classifier 2 forming the classifying stage, a filter 3, a fan 4 and a bucket elevator 5 which feeds the ground material discharged from the mill 1 to the classifier 2.
  • a gas line 7 connected to the mill discharge housing 6 and carrying the exhaust air from the mill 1 is connected to the classifier 2.
  • the fresh material is fed into the mill 1 via a conveyor 8.
  • the ground material discharged from the mill 1 passes from the mill discharge housing 6 via a conveyor 9, the bucket elevator 5 and a conveyor 10 into the classifier 2.
  • the precipitates precipitating in the sifter 2 return to the mill 1 via a conveying device 11, while the fine material with the classifying air reaches the filter 3 via a line 12.
  • the fine material separated here is discharged via a conveying device 13, while the dust-free exhaust air is discharged outside by the fan 4.
  • the sifter 2 is supplied with exhaust air from the mill 7 on the one hand and fresh air through a connection 14 on the other hand.
  • FIG. 2 and 3 illustrate the details of the sifter 2. It contains in a housing 15 a vertical shaft 16 which is driven by a motor 17 via a gear 18 and which is mounted at its lower end in a bearing 19 which by means of radial struts 20 is held.
  • the shaft 16 carries a rotating spreading disc 21, to which the material is fed via a stationary feed hopper 22 from a pneumatic conveying trough 23, which can be part of the conveying device 10 already mentioned.
  • the classifier 2 there is a rotor 24 (deflector rotor) with vertically arranged vanes 24a on the shaft 16 (instead, the classifier 2 according to the invention can also be equipped with a rotor which contains horizontally arranged vanes and thus forms a so-called counter-vane system).
  • a multi-graded funnel 25 is provided in the lower part, which serves to discharge the coarse material (via the outlet 26).
  • three blind rings 27, 28, 29 are provided one above the other, through which the fresh air (arrows 30) enters the interior of the classifier.
  • the preferably individually adjustable guide vanes of the louvered rings 27, 28, 29 are arranged in such a way that a swirl is imparted to the fresh air (arrows 30) as it enters the interior of the classifier.
  • a further blind ring 34 above the rotor 24 provided on the air outlet side of the classifier.
  • the guide vanes of this blind ring 34 are preferably individually adjustable. 3
  • a spirally arranged air outlet 35 adjoins this ring of blinds.
  • Fig. 3 also reveals the also spiral or tangential connection 14 of the fresh air.
  • the visible material 36 which is given to the spreading plate 21 via the pneumatic conveying trough 23 is scattered radially into the viewing space 33 by the spreading plate 21 and is sighted here under the action of the rotating rising rising sight air. While the coarse material 37 falls down, is discharged through the outlet 26 and is fed again to the mill 1, the fine material 38 is taken along by the classifying air and, after passing through the rotor 24, is passed to the filter 3 and separated there. Oversize particles initially contained in the sifting air flow are rejected by the rotor 24.
  • the dust extraction of the mill exhaust air takes place together with the separation of the fine material in the filter 3.
  • the cooling of the material to be classified is carried out by the fresh air stream supplied via the connection 24, which together with the mill exhaust air forms the classifying air.
  • the method according to the invention is of course not only suitable for cement grinding, but also for the fine grinding of other materials, such as cement raw material, ore, phosphate, coal, etc.
  • the illustrated and described embodiment of the classifier can be modified in many details within the scope of the invention.
  • the vision system can contain a deflector rotor.
  • Other types of introduction of the visible material are of course also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP19860106698 1985-06-14 1986-05-16 Procédé et installation pour le broyage fin des matériaux Withdrawn EP0209663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3521491 1985-06-14
DE19853521491 DE3521491A1 (de) 1985-06-14 1985-06-14 Verfahren und anlage zur feinzerkleinerung von gut

Publications (1)

Publication Number Publication Date
EP0209663A1 true EP0209663A1 (fr) 1987-01-28

Family

ID=6273364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860106698 Withdrawn EP0209663A1 (fr) 1985-06-14 1986-05-16 Procédé et installation pour le broyage fin des matériaux

Country Status (3)

Country Link
EP (1) EP0209663A1 (fr)
BR (1) BR8601712A (fr)
DE (1) DE3521491A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519535A1 (fr) * 1991-06-17 1992-12-23 ITALCEMENTI S.p.A. Séparateur dynamique pour matières pulvérulentes, en particulier du ciment, et installation comportant ledit séparateur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004865A2 (fr) * 1978-04-22 1979-10-31 Josef Prof. Dr.-Ing. Wessel Tamiseur pneumatique
DE3044601A1 (de) * 1980-11-27 1982-07-08 Krupp Polysius Ag, 4720 Beckum Sichter-mahlanlage
EP0073567A2 (fr) * 1981-09-01 1983-03-09 F.L. Smidth & Co. A/S Procédé et dispositif pour trier des matières particulaires
US4388183A (en) * 1980-10-13 1983-06-14 Christian Pfeiffer Swirling air centrifugal scatter classifier
EP0115057A2 (fr) * 1983-01-29 1984-08-08 Alpine Aktiengesellschaft Séparateur pneumatique pour le domaine des matières fines
DE3410363A1 (de) * 1984-03-21 1985-10-03 Krupp Polysius Ag, 4720 Beckum Umluftsichter
DE2947310C2 (de) * 1978-11-24 1987-05-27 Kabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho, Osaka Durchluftsichter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790550A (en) * 1954-10-25 1957-04-30 Sturtevant Mill Co Apparatus for centrifugal separation
DE1236308B (de) * 1964-02-14 1967-03-09 Wedag Westfalis Dinnendahl Gro Mahlanlage fuer Kalkstein od. dgl.
DE1507679C3 (de) * 1966-06-02 1974-10-10 Wedag Westfalia Dinnendahl Groeppel Ag, 4630 Bochum Verfahren zum Kühlen von Zement
DE1607623A1 (de) * 1967-08-21 1970-10-22 Wedag Westfalia Dinnendahl Mahlanlage fuer feuchtes Gut
DE1607625A1 (de) * 1967-09-02 1970-07-09 Wedag Westfalia Dinnendahl Mahlanlage,insbesondere fuer waermeempfindliches Gut

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004865A2 (fr) * 1978-04-22 1979-10-31 Josef Prof. Dr.-Ing. Wessel Tamiseur pneumatique
DE2947310C2 (de) * 1978-11-24 1987-05-27 Kabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho, Osaka Durchluftsichter
US4388183A (en) * 1980-10-13 1983-06-14 Christian Pfeiffer Swirling air centrifugal scatter classifier
DE3044601A1 (de) * 1980-11-27 1982-07-08 Krupp Polysius Ag, 4720 Beckum Sichter-mahlanlage
EP0073567A2 (fr) * 1981-09-01 1983-03-09 F.L. Smidth & Co. A/S Procédé et dispositif pour trier des matières particulaires
EP0115057A2 (fr) * 1983-01-29 1984-08-08 Alpine Aktiengesellschaft Séparateur pneumatique pour le domaine des matières fines
DE3410363A1 (de) * 1984-03-21 1985-10-03 Krupp Polysius Ag, 4720 Beckum Umluftsichter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519535A1 (fr) * 1991-06-17 1992-12-23 ITALCEMENTI S.p.A. Séparateur dynamique pour matières pulvérulentes, en particulier du ciment, et installation comportant ledit séparateur

Also Published As

Publication number Publication date
DE3521491A1 (de) 1986-12-18
BR8601712A (pt) 1987-03-10

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Inventor name: HENNE, HEINRICH, DIPL.-ING.

Inventor name: BLASCZYK, GOTTHARDT, DIPL.-ING.

Inventor name: EICKHOLT, HUBERT, DIPL.-ING.