EP0370267B1 - Device for feeding material to a subassembly - Google Patents

Device for feeding material to a subassembly Download PDF

Info

Publication number
EP0370267B1
EP0370267B1 EP89120028A EP89120028A EP0370267B1 EP 0370267 B1 EP0370267 B1 EP 0370267B1 EP 89120028 A EP89120028 A EP 89120028A EP 89120028 A EP89120028 A EP 89120028A EP 0370267 B1 EP0370267 B1 EP 0370267B1
Authority
EP
European Patent Office
Prior art keywords
air inlet
roller mill
feed chute
material feed
separator
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.)
Expired - Lifetime
Application number
EP89120028A
Other languages
German (de)
French (fr)
Other versions
EP0370267A3 (en
EP0370267A2 (en
Inventor
Dietmar Holsiepe
Ludger Lohnherr
Hans-Dieter Dipl.-Ing. Grudno
Bernhard Zigan
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 EP0370267A2 publication Critical patent/EP0370267A2/en
Publication of EP0370267A3 publication Critical patent/EP0370267A3/en
Application granted granted Critical
Publication of EP0370267B1 publication Critical patent/EP0370267B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B02C23/02—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
    • 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
    • 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
    • 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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • 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 roller mill with a material feed chute which feeds the material to be comminuted by the force of gravity of the grinding path of the roller mill and with a classifier arranged above the grinding path, the material which is discharged over the edge of the grinding path and is sufficiently comminuted by means of a fan through the roller mill and the Sifter-sucked gas flow can be conveyed to the sifter.
  • a roller mill of this type is known, for example, from Duda Cement Data-Book, 3rd edition (1985), pp. 240 to 243.
  • a roll crusher is also known, to which the regrind to be crushed is fed by an air stream.
  • a sifting air flow is used here, which distributes the ground material to be ground in the longitudinal direction of the roller crusher, so that coarse particles of the ground material are ground over a greater part of the length of the roller crusher than fine particles of the ground material.
  • a coal powder delivery shaft which contains a Y-shaped separation point, the pulverized coal being conveyed pneumatically upwards, while heavy foreign bodies fall down against the conveying air flow.
  • US-A-2 681 768 discloses a device for the pneumatic supply of regrind to a hammer mill, a conveying air flow taking the regrind located in the upper region of a shaft with it.
  • the invention has for its object to design a device of the type required in the preamble of claim 1 so that a substantial increase in performance of the roller mill is achieved.
  • At least one air inlet duct is connected to the bottom of the material feed chute, through which an air stream which looks out the fine particles from the material to be shredded can be introduced into the material feed chute, whereby the fine particles already found in the material feed chute together with that of the Roller mill sufficient comminuted material can be fed directly to the classifier.
  • the fine particles contained in the material to be shredded are therefore already in the material feed chute, i.e. Before reaching the grinding path of the roller mill, it is sighted out of the feed material by means of an air stream and fed directly to the classifier, bypassing the roller mill.
  • the inventive precaution of the material to be shredded in the material feed chute also bears to a significant relief of the classifier, which results in a considerable increase in performance and an improvement in the selectivity.
  • the roller mill schematically illustrated in FIG. 1 with an integrated classifier contains, in a housing 1, a roller mill 2 (only shown schematically) (with an annular grinding path 3 and drive 4) and a static classifier 5 with guide vanes 6, coarse material cone 7 and pendulum flap 8.
  • the material to be shredded is fed to the roller mill 2 via a material feed chute 9 to which two air inlet ducts 10, 11 are connected in the region of the bottom of the sloping lower chute part.
  • the lower inlet openings of these air inlet channels 10 and 11 are provided with slides, as shown in FIGS. 2 and 3 in detail.
  • the air inlet opening 10 a of the upper air inlet duct 10 is limited by means of two laterally (arrows 12) adjustable sliders 13, 14. By adjusting these sliders 13, 14, not only the size but also the spatial position of the effective air inlet opening 10a can be set.
  • the size of the air inlet opening 11a of the lower air inlet duct 11 can be adjusted by means of a slide 15 which extends over the entire width of this air inlet duct 11.
  • a gas stream (arrow 16), preferably furnace gas, is drawn in through a nozzle ring 18 by means of a fan connected to the nozzle 17 of the housing 1 and, together with the one discharged over the edge of the grinding track 3, is sufficiently comminuted Well directed to classifier 5 (arrows 19).
  • the coarse material precipitates in the classifier 5 and is returned to the grinding path 3 via the cone 7 and the pendulum flap 8, while the fine material leaves the classifier through the nozzle 17 (arrow 20).
  • two air streams which are fed through the air inlet ducts 10 and 11 are now sucked through the feed material passing through the material feed chute 9 (arrow 21).
  • the fine and ultra-fine fractions contained in the feed material are detected by these sifting air flows (arrows 22, 23) and, together with the material sufficiently comminuted by the roller mill 2, are fed directly to the classifier 5.
  • the fine and ultra-fine fractions, which have already been aligned in the material supply chute 9 in this way, do not take the detour via the roller mill in this way, but are fed directly to the finished product via the classifier 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Disintegrating Or Milling (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Drying Of Solid Materials (AREA)

Description

Die Erfindung betrifft eine Rollenmühle mit einer das zu zerkleinernde Material durch Schwerkraftwirkung der Mahlbahn der Rollenmühle zuführenden Materialaufgabeschurre sowie mit einem über der Mahlbahn angeordneten Sichter, wobei das über den Rand der Mahlbahn ausgetragene, genügend zerkleinerte Gut durch einen mittels eines Ventilators durch die Rollenmühle und den Sichter gesaugten Gasstrom zum Sichter förderbar ist.The invention relates to a roller mill with a material feed chute which feeds the material to be comminuted by the force of gravity of the grinding path of the roller mill and with a classifier arranged above the grinding path, the material which is discharged over the edge of the grinding path and is sufficiently comminuted by means of a fan through the roller mill and the Sifter-sucked gas flow can be conveyed to the sifter.

Eine Rollenmühle dieser Art ist beispielsweise durch Duda Cement Data-Book, 3. Aufl. (1985), S.240 bis 243 bekannt.A roller mill of this type is known, for example, from Duda Cement Data-Book, 3rd edition (1985), pp. 240 to 243.

Durch die FR-A-10 78 518 ist weiterhin ein Walzenbrecher bekannt, dem das zu zerkleinernde Mahlgut durch einen Luftstrom zugeführt wird. Hierbei findet ein Sichtluftstrom Verwendung, der das zu zerkleinernde Mahlgut in Längsrichtung des Walzenbrechers verteilt, so daß grobe Partikel des Mahlgutes auf einem größeren Teil der Länge des Walzenbrechers zerkleinert werden als feine Partikel des Mahlgutes.From FR-A-10 78 518 a roll crusher is also known, to which the regrind to be crushed is fed by an air stream. A sifting air flow is used here, which distributes the ground material to be ground in the longitudinal direction of the roller crusher, so that coarse particles of the ground material are ground over a greater part of the length of the roller crusher than fine particles of the ground material.

Durch die US-A-1 679 997 ist weiterhin ein Kohlepulver-Förderschacht bekannt, der eine Y-förmige Trennstelle enthält, wobei die pulverisierte Kohle pneumatisch aufwärts gefördert wird, während schwere Fremdkörper entgegen dem Förderluftstrom nach unten ausfallen.From US-A-1 679 997 a coal powder delivery shaft is also known which contains a Y-shaped separation point, the pulverized coal being conveyed pneumatically upwards, while heavy foreign bodies fall down against the conveying air flow.

Durch die US-A-2 681 768 ist schließlich eine Einrichtung zur pneumatischen Zuführung von Mahlgut zu einer Hammermühle bekannt, wobei ein Förderluftstrom das im oberen Bereich eines Schachtes befindliche Mahlgut mitnimmt.Finally, US-A-2 681 768 discloses a device for the pneumatic supply of regrind to a hammer mill, a conveying air flow taking the regrind located in the upper region of a shaft with it.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der im Oberbegriff des Anspruches 1 vorausgesetzten Art so auszubilden, daß eine wesentliche Leistungssteigerung der Rollenmühle erreicht wird.The invention has for its object to design a device of the type required in the preamble of claim 1 so that a substantial increase in performance of the roller mill is achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß an dem Boden der Materialaufgabeschurre wenigstens ein Lufteintrittskanal angeschlossen ist, durch den ein die Feinanteile aus dem zu zerkleinernden Material aussichtender Luftstrom in die Materialaufgabeschurre einleitbar ist, wodurch die bereits in der Materialaufgabeschurre ausgesichteten Feinanteile zusammen mit dem von der Rollenmühle genügend zerkleinerten Gut unmittelbar dem Sichter zuleitbar sind.This object is achieved in that at least one air inlet duct is connected to the bottom of the material feed chute, through which an air stream which looks out the fine particles from the material to be shredded can be introduced into the material feed chute, whereby the fine particles already found in the material feed chute together with that of the Roller mill sufficient comminuted material can be fed directly to the classifier.

Erfindungsgemäß werden somit die im zu zerkleinernden Material enthaltenen Feinanteile bereits in der Materialaufgabeschurre, d.h. noch vor Erreichen der Mahlbahn der Rollenmühle aus dem Aufgabematerial mittels eines Luftstromes ausgesichtet und unter Umgehung der Rollenmühle direkt dem Sichter zugeführt.According to the invention, the fine particles contained in the material to be shredded are therefore already in the material feed chute, i.e. Before reaching the grinding path of the roller mill, it is sighted out of the feed material by means of an air stream and fed directly to the classifier, bypassing the roller mill.

Bei den der Erfindung zugrundeliegenden Versuchen zeigte sich, daß eine Leistungssteigerung der Rollenmühle von über 10% erzielt werden kann, wenn man durch eine Luftstromsichtung in der Materialaufgabeschurre vermeidet, daß die Fein- und Feinstanteile des Mahlgutes nochmals übermahlen werden.In the experiments on which the invention is based, it was found that a roller mill performance increase of over 10% can be achieved if air flow screening in the material feed chute prevents the fine and very fine fractions of the ground material from being overgrown again.

Die Aussichtung der Fein- und Feinstanteile aus dem Aufgabematerial ergibt auch in der Rollenmühle ein stabileres Mahlbett, während ein hoher Anteil von Feinstanteilen im Mahlbett zu einer Destabilisierung des Mahlbettes und einer Verringerung der Mahlleistung führt.The prospect of the fine and ultra-fine fractions from the feed material also results in a more stable grinding bed in the roller mill, while a high proportion of fine fractions in the milling bed leads to destabilization of the grinding bed and a reduction in grinding capacity.

Die erfindungsgemäße Vorsichtung des zu zerkleinernden Materiales in der Materialaufgabeschurre trägt ferner zu einer wesentlichen Entlastung des Sichters bei, die eine beachtliche Leistungssteigerung und eine Verbesserung der Trennschärfe zur Folge hat.The inventive precaution of the material to be shredded in the material feed chute also bears to a significant relief of the classifier, which results in a considerable increase in performance and an improvement in the selectivity.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht. Es zeigen

Fig. 1
einen schematischen Querschnitt durch eine Rollenmühle mit Sichter und der erfindungsgemäßen Materialzuführung,
Fig. 2+3
Aufsichten auf die beiden Lufteintrittskanäle der Materialzuführvorrichtung.
An embodiment of the invention is illustrated in the drawing. Show it
Fig. 1
2 shows a schematic cross section through a roller mill with classifier and the material feed according to the invention,
Fig. 2 + 3
Top views of the two air inlet ducts of the material feed device.

Die in Fig. 1 schematisch veranschaulichte Rollenmühle mit integriertem Sichter enthält in einem Gehäuse 1 eine nur schematisch veranschaulichte Rollenmühle 2 (mit ringförmiger Mahlbahn 3 und Antrieb 4) sowie einen statischen Sichter 5 mit Leitschaufeln 6, Grobgut-Konus 7 und Pendelklappe 8.The roller mill schematically illustrated in FIG. 1 with an integrated classifier contains, in a housing 1, a roller mill 2 (only shown schematically) (with an annular grinding path 3 and drive 4) and a static classifier 5 with guide vanes 6, coarse material cone 7 and pendulum flap 8.

Die Zuführung des zu zerkleinernden Materiales zur Rollenmühle 2 erfolgt über eine Materialaufgabeschurre 9, an die im Bereich des Bodens des schräg verlaufenden unteren Schurrenteiles zwei Lufteintrittskanäle 10, 11 angeschlossen sind.The material to be shredded is fed to the roller mill 2 via a material feed chute 9 to which two air inlet ducts 10, 11 are connected in the region of the bottom of the sloping lower chute part.

Die unteren Eintrittsöffnungen dieser Lufteintrittskanäle 10 und 11 sind mit Schiebern versehen, wie die Fig. 2 und 3 im einzelnen zeigen.The lower inlet openings of these air inlet channels 10 and 11 are provided with slides, as shown in FIGS. 2 and 3 in detail.

Die Lufteintrittsöffnung 10 a des oberen Lufteintrittskanales 10 wird mittels zweier seitlich (Pfeile 12) verstellbarer Schieber 13, 14 begrenzt. Durch Einstellung dieser Schieber 13, 14 kann nicht nur die Größe, sondern auch die räumliche Lage der wirksamen Lufteintrittsöffnung 10a eingestellt werden.The air inlet opening 10 a of the upper air inlet duct 10 is limited by means of two laterally (arrows 12) adjustable sliders 13, 14. By adjusting these sliders 13, 14, not only the size but also the spatial position of the effective air inlet opening 10a can be set.

Die Lufteintrittsöffnung 11a des unteren Lufteintrittskanales 11 läßt sich in ihrer Größe mittels eines über die ganze Breite dieses Lufteintrittskanales 11 reichenden Schiebers 15 einstellen.The size of the air inlet opening 11a of the lower air inlet duct 11 can be adjusted by means of a slide 15 which extends over the entire width of this air inlet duct 11.

Im Betrieb der in Fig. 1 veranschaulichten Rollenmühle wird ein Gasstrom (Pfeil 16), vorzugsweise Ofengas, mittels eines an den Stutzen 17 des Gehäuses 1 angeschlossenen Ventilators durch einen Düsenring 18 angesaugt und zusammen mit dem über den Rand der Mahlbahn 3 ausgetragenen, genügend zerkleinerten Gut zum Sichter 5 geleitet (Pfeile 19). Im Sichter 5 fällt das Grobgut aus und wird über den Konus 7 und die Pendelklappe 8 zur Mahlbahn 3 zurückgeführt, während das Feingut den Sichter durch den Stutzen 17 verläßt (Pfeil 20).In the operation of the roller mill illustrated in FIG. 1, a gas stream (arrow 16), preferably furnace gas, is drawn in through a nozzle ring 18 by means of a fan connected to the nozzle 17 of the housing 1 and, together with the one discharged over the edge of the grinding track 3, is sufficiently comminuted Well directed to classifier 5 (arrows 19). The coarse material precipitates in the classifier 5 and is returned to the grinding path 3 via the cone 7 and the pendulum flap 8, while the fine material leaves the classifier through the nozzle 17 (arrow 20).

Erfindungsgemäß werden nun durch das die Materialaufgabeschurre 9 durchsetzende Aufgabematerial (Pfeil 21) zwei Luftströme im Querstrom hindurchgesaugt, die durch die Lufteintrittskanäle 10 und 11 zugeführt werden. Die im Aufgabegut enthaltenen Fein- und Feinstanteile werden von diesen Sichtluftströmen erfaßt (Pfeile 22, 23) und zusammen mit dem von der Rollenmühle 2 hinreichend zerkleinerten Gut unmittelbar dem Sichter 5 zugeleitet. Die aus dem aufgegebenen Material auf diese Weise bereits in der Materialsufgabeschurre 9 ausgesichteten Fein- und Feinstanteile nehmen auf diese Weise nicht den Umweg über die Rollenmühle, sondern werden über den Sichter 5 direkt dem Fertiggut zugeführt.According to the invention, two air streams which are fed through the air inlet ducts 10 and 11 are now sucked through the feed material passing through the material feed chute 9 (arrow 21). The fine and ultra-fine fractions contained in the feed material are detected by these sifting air flows (arrows 22, 23) and, together with the material sufficiently comminuted by the roller mill 2, are fed directly to the classifier 5. The fine and ultra-fine fractions, which have already been aligned in the material supply chute 9 in this way, do not take the detour via the roller mill in this way, but are fed directly to the finished product via the classifier 5.

Claims (4)

  1. Roller mill (2) with a material feed chute (9) which delivers the material to be comminuted under the effect of gravity to the grinding track (3) of the roller mill as well as a separator (5) arranged above the grinding track (3), in which sufficiently comminuted material discharged over the edge of the grinding track (3) can be conveyed to the separator (5) by a gas stream drawn in by means of a fan through the roller mill (2) and the separator (5), characterised in that at least one air inlet channel (10, 11), through which an air stream which separates the fines out of the material to be comminuted can be introduced into the material feed chute (9), is connected to the base of the material feed chute (9), as a result of which the fines already separated out in the material feed chute (9) can be delivered directly to the separator (5) together with the sufficiently comminuted material from the roller mill.
  2. Apparatus as claimed in claim 1, characterised in that at least two air inlet channels (10, 11) arranged at different heights are connected to the material feed chute (9).
  3. Apparatus as claimed in claim 2, characterised in that the size and physical position of the effective air inlet opening (10a) of one air inlet channel (10) can be set by means of two lateral movable slide gates (13, 14).
  4. Apparatus as claimed in claims 2 and 3, characterised in that the size of the effective air inlet opening (11a) of the other air inlet channel (11) can be set by means of a slide gate (15) which extends over the entire breadth of this air inlet channel.
EP89120028A 1988-11-22 1989-10-27 Device for feeding material to a subassembly Expired - Lifetime EP0370267B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839419 1988-11-22
DE3839419A DE3839419A1 (en) 1988-11-22 1988-11-22 DEVICE FOR FEEDING MATERIAL INTO A PLANT PART

Publications (3)

Publication Number Publication Date
EP0370267A2 EP0370267A2 (en) 1990-05-30
EP0370267A3 EP0370267A3 (en) 1991-03-20
EP0370267B1 true EP0370267B1 (en) 1993-06-23

Family

ID=6367640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120028A Expired - Lifetime EP0370267B1 (en) 1988-11-22 1989-10-27 Device for feeding material to a subassembly

Country Status (9)

Country Link
US (1) US4982905A (en)
EP (1) EP0370267B1 (en)
KR (1) KR930008282B1 (en)
BR (1) BR8905860A (en)
DE (2) DE3839419A1 (en)
DK (1) DK580089A (en)
ES (1) ES2042935T3 (en)
MX (1) MX172501B (en)
ZA (1) ZA898257B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU656334B2 (en) * 1990-10-30 1995-02-02 Fukutaro Kataoka Fluidized crusher/drier for use in a fluidized crusher/drier system
DE4116683A1 (en) * 1991-05-22 1992-11-26 Nied Roland Wind sifter for separate removal of coarse and fine materials - has preliminary jet pipe and high-speed gas jet for initial dispersal of material
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
US5819947A (en) * 1996-01-29 1998-10-13 Sure Alloy Steel Corporation Classifier cage for rotating mill pulverizers
DE19651103A1 (en) * 1996-12-09 1998-06-10 Krupp Polysius Ag Roll milling process for pulverising relatively hard brittle material e.g. clinker cement
US6446888B1 (en) * 2000-11-08 2002-09-10 Robert M. Williams, Sr. Grinding apparatus with vertical static separators
DE102006049742A1 (en) * 2006-10-21 2008-04-24 Khd Humboldt Wedag Gmbh Classifier for sifting grainy goods
WO2009093346A1 (en) 2008-01-24 2009-07-30 Mitsubishi Heavy Industries, Ltd. Roller mill structure
US7946516B1 (en) * 2009-12-31 2011-05-24 Flsmidth A/S Feed chute for vertical roller mill
DE102012107127B4 (en) 2012-08-03 2017-08-17 Thyssenkrupp Industrial Solutions Ag Vertical roller mill
US10016762B2 (en) * 2015-06-16 2018-07-10 Arvos Raymond Bartlett Snow Llc Vertical bowl mill for producing coarse ground particles
CN107243388B (en) * 2017-05-17 2019-04-16 柳州博海科技有限公司 A kind of flour mill for milk tea powder agglomates
CN109261975A (en) * 2018-10-19 2019-01-25 赣州海创钨业有限公司 Blanking device is used in a kind of production of tungsten powder

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681768A (en) * 1954-06-22 Apparatus for feeding grain to
US1679997A (en) * 1928-08-07 coal pulverizing machine
US1024832A (en) * 1911-10-05 1912-04-30 E B Cox Mfg Co Apparatus for treating grain.
DE903163C (en) * 1951-06-05 1954-02-01 Soest Ferrum Appbau G M B H Ball mill
DE1938772C3 (en) * 1969-07-30 1980-06-12 Krupp Polysius Ag, 4720 Beckum Roller mill
FR2082301A5 (en) * 1970-03-10 1971-12-10 Camail Jean
US3951347A (en) * 1972-09-21 1976-04-20 Polysius Ag Apparatus for crushing material containing particles that are hard to pulverize
IT1007568B (en) * 1973-01-24 1976-10-30 Buehler Ag Geb ROLLER FRAME WITH A FEEDING DEVICE AND A PNEUMATIC INLET DUCT
US3998396A (en) * 1973-12-17 1976-12-21 Continental Oil Company Scalping apparatus for a low profile two-roll crusher
US3934826A (en) * 1974-06-05 1976-01-27 American Pulverizer Company Coal crusher
US4498633A (en) * 1982-11-04 1985-02-12 Williams Patent Crusher And Pulverizer Company Apparatus for processing coal
DE8425837U1 (en) * 1984-08-31 1984-11-22 Krupp Polysius Ag, 4720 Beckum Roller mill
GB2181971B (en) * 1985-10-29 1988-11-09 Smidth & Co As F L Vertical roller mill
SU1414460A1 (en) * 1986-12-19 1988-08-07 Красноярский Филиал Государственного Всесоюзного Научно-Исследовательского Института Строительных Материалов И Конструкций Им.П.П.Будникова Milling unit
ES2024560B3 (en) * 1987-03-24 1992-03-01 Mitsubishi Heavy Ind Ltd ROLLER MILL.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Duda, CEMENT DATA-BOOK, 3. Auflage (1985), S. 240-243 *

Also Published As

Publication number Publication date
DK580089A (en) 1990-05-23
KR930008282B1 (en) 1993-08-27
EP0370267A3 (en) 1991-03-20
KR900007479A (en) 1990-06-01
DE58904791D1 (en) 1993-07-29
EP0370267A2 (en) 1990-05-30
US4982905A (en) 1991-01-08
DK580089D0 (en) 1989-11-17
ZA898257B (en) 1990-07-25
DE3839419A1 (en) 1990-05-23
MX172501B (en) 1993-12-17
BR8905860A (en) 1990-06-12
ES2042935T3 (en) 1993-12-16

Similar Documents

Publication Publication Date Title
EP0525423B1 (en) Method and device for grinding materials of different sizes
EP0384101B1 (en) Air classifier for sifting a granular material, and grinding plant employing such a classifier
EP0370267B1 (en) Device for feeding material to a subassembly
EP0603481B1 (en) Method and arrangement for milling grinding stock
EP0325770B1 (en) Grinding method and arrangement
EP0460490B1 (en) Air classifier
DE4223762A1 (en) Bulk grain classifier with reduced wear - comprising pre-classifier chamber having inlet for grains and outlet for coarse grains
EP0374491B1 (en) Sifter
DE4323587A1 (en) Method and device for crushing material of different grain sizes
EP3209423A1 (en) Grinding system for grinding a material to be ground, and method for grinding a material to be ground
EP0164512B1 (en) Milling process and milling device
EP0292739A2 (en) Method and arrangement for breaking up grindable material
DE102018105978B3 (en) Classifier and method for sifting a material stream and a grinding plant
DE1482454B1 (en) Circulating air separator
DE69103637T2 (en) DOUBLE SEPARATOR FOR SIGHTING PARTICLE MATERIAL.
DE2456970B2 (en) Through air sifter
DE102013002237B3 (en) Classifier
EP0338231A2 (en) Crushing plant
EP3368222B1 (en) Pneumatically connected cascade classifier and circulating grinding plant with pneumatically connected cascade classifiers
DE3229629C2 (en)
DE19526040A1 (en) Installation in which grains of material are reduced in size
DE4307230A1 (en) Process and plant for comminuting the bed of brittle regrind
DE102004027128A1 (en) Sieve assembly, to sort granular materials into at least three fractions for a mill, has a concentric array of a static and a dynamic sieve around a common axis in a common housing
DE2617274C2 (en) Mill drying plant
EP0443119B1 (en) Dynamic roller mill-air classifier

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19910821

17Q First examination report despatched

Effective date: 19921207

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REF Corresponds to:

Ref document number: 58904791

Country of ref document: DE

Date of ref document: 19930729

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930816

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2042935

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940914

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951027

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951027

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021106

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030911

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20031008

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051027

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20041028