EP0504041A1 - Trennwand für Rohrkugelmühle mit mehreren Hubbereichen für das Mahlgut - Google Patents

Trennwand für Rohrkugelmühle mit mehreren Hubbereichen für das Mahlgut Download PDF

Info

Publication number
EP0504041A1
EP0504041A1 EP92400628A EP92400628A EP0504041A1 EP 0504041 A1 EP0504041 A1 EP 0504041A1 EP 92400628 A EP92400628 A EP 92400628A EP 92400628 A EP92400628 A EP 92400628A EP 0504041 A1 EP0504041 A1 EP 0504041A1
Authority
EP
European Patent Office
Prior art keywords
downstream
cage
upstream
partition according
partition
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Withdrawn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
EP92400628A
Other languages
English (en)
French (fr)
Inventor
Benjamin Cambier
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0504041A1 publication Critical patent/EP0504041A1/de
Withdrawn legal-status Critical Current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
    • 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
    • B02C17/04—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 with unperforated container
    • B02C17/06—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 with unperforated container with several compartments

Definitions

  • the present invention relates to a partition for a horizontal crusher comprising a cylindrical shell provided to rotate around its longitudinal axis and which contains a grinding load, composed of grinding bodies of the ball or bar or roller type, said partition being placed transversely to the ferrule and being provided with calibrated openings allowing the passage of the crushed material while retaining the crushing bodies.
  • ball will be used for simplification to designate any grinding body placed freely inside a compartment of a cylindrical grinder to reduce the particle size of the material to be ground, for example cement clinker , pozzolana, by the action of its mass and its surface during the rotation of the grinder.
  • a partition of a known type is described in this document FR.A.2.565.850. It is a double partition, which comprises as an upstream face a portion of grid allowing the ground material to penetrate and as downstream face a solid disc, and which comprises an axial orifice closed by a grid and surrounded by a conical baffle.
  • This double partition is composed of a certain number of sectors delimited by spokes which are U-shaped profiles whose webs serve as lifting blades for the ground material. In the example illustrated, there are eight sectors each occupying an angular zone of 45 °.
  • the ground material coming from the upstream compartment which has passed through the openings of the upstream grid and which has accumulated in a given sector, first flows along the radius forming the blade of lifting then along the central conical baffle to be discharged into the downstream compartment.
  • the first object of the invention is to provide a double partition for a cylindrical mill which requires a less powerful gas stream, thereby reducing the energy consumption of the mill.
  • the lifting of the ground material is carried out on several levels, taken in the radial direction of the mill. All of the ground material entered on the upstream faces of the lifting modules is discharged into the downstream compartment not only in the central zone as was the case in known partitions, but on as many discharge levels as there are module levels in the radial direction.
  • the material follows a more direct route between the upstream compartment and the downstream compartment, the pressure drops are lower and the gas flow is equivalent.
  • Another object of the invention is to propose a double partition which is produced from standard elements of easy assembly.
  • each lifting module comprises a cage of substantially trapezoidal section, covered on its upstream face with a grid and on its downstream face with a material passage plate, all the modules of the same level being identical.
  • each cage is able to be positioned to the adjacent cages, both circumferentially and radially, by interposing of keys and assembled by bolts.
  • the grids and the plates for the passage of the material are capable of being fixed, after assembly of the trapezoidal cages, respectively on the upstream and downstream edges of said cages. It is thus possible to very easily replace the worn parts of the partition without dismantling the structural base of the partition, namely the assembly of the trapezoidal cages.
  • the passage plate covering the downstream face of the lifting module may consist of a solid plate, provided with a lumen formed along the small base of the trapezoid.
  • the passage plate covering the downstream face of the lifting module consists of a grid. This further reduces the pressure losses during the transfer of the material under the effect of the gas stream and further reduces the energy consumption of the mill.
  • Another object of the invention is to provide a double partition for a cylindrical grinder by means of which the ground material is poured into the downstream compartment in the immediate vicinity of the base of said partition. It has in fact been noted that, in current double partitions, the material is projected far beyond the base of the partition, which reduces the grinding efficiency of the downstream compartment.
  • downstream end of the radial member of the cage has a rounded profile and the passage light of the downstream face is inclined in the extension of the rounding of the member.
  • the inclination of the light is at least 30 °.
  • the material is poured into the downstream compartment very close to the partition.
  • the double partition 1 is mounted transversely inside the shell 2 of the cylindrical ball mill. This partition 1 separates two compartments of the mill, respectively upstream 3 and downstream 4, in the direction of flow of the material.
  • the role of the partition 1 is to retain the balls (not shown) while letting through the ground material, which is entrained in its movement by a gaseous current caused by fans.
  • the partition 1 consists of a set of lifting modules 5, which are on the one hand circumferentially contiguous and on the other hand superimposed to form three levels in the present example.
  • FIG. 2 there is partially shown a partition 1 which is composed of fifty modules 5: the outer level 6 in contact with the shell 2 comprising twenty modules 5, the intermediate level 7 twenty modules also and the inner level 8 ten modules.
  • the partition 1 has an axial orifice 9 in which is mounted a set of two retaining devices 10,11, conical in shape and mounted coaxially at a distance from each other slightly less than the diameter of the smallest ball of the upstream compartment 3.
  • the gas stream (arrow G) is able to pass between the retaining cones and in the axial orifice of each cone, while the balls are prevented from passing due to the presence of retaining cones and the fact that the orifice axial 13 has a diameter less than the diameter of the smallest ball.
  • the dimensioning of the retaining cones 10.11 is calculated with a sufficient margin to take account of the wear of the balls.
  • Each lifting module 5 is composed of three elements: a central cage 14, an upstream grid 15 and a downstream grid 16.
  • the upstream grid 15 and the downstream grid 16 are fixed by screwing on the peripheral edges 17 upstream and downstream of the cage 14, said peripheral edges 17 being for this purpose pierced with threaded holes 18.
  • Each upstream and downstream grid 15 and 16 consists of a plate 19 provided with lights 20 for the passage of the ground material. Only one example of an upstream grid 15 has been shown in FIG. 2, in which twelve slots 20 are arranged.
  • the plate 19 has the trapezoidal shape corresponding to the upstream face of the corresponding cage 14. Two sides 21, 22 of the plate 19 converge towards the longitudinal axis of rotation 23 of the ferrule 2.
  • the slots 20 are slots substantially parallel to the other two sides 24, 25 of the plate 19, at the rate of two columns of six lights. It is understood that the two sides 24, 25 are not straight but are curved, being themselves concentric with respect to the axis 23.
  • the central cages 14 are one-piece metal parts which can be positioned by interposing of keys 26 and assembled using bolts.
  • each cage 14 has on the side 27 which must be in contact with an adjacent cage an external recess 28 and an orifice 29.
  • the depth h of the recess 28 is such that the key 26 which is positioned in the recesses 28 a and 28 b which face two cages 14 a and 14 b adjacent to a thickness equal to twice the depth h and to the clearance e between the two cages 14 a and 14 b .
  • the key 26 is pierced with an orifice 30 which is aligned with the orifices 29 a and 29 b so as to allow the passage of the assembly screw.
  • the partition 1 according to the invention results from the assembly of standard modules.
  • the modules corresponding to the interior 8 and intermediate 7 levels will be unchanged: only the dimensions of the modules corresponding to the exterior level 6 in contact with the shell 2 will change.
  • this is an important advantage of the he invention, it is possible to equip mills with different diameters with a limited number of types of standard modules.
  • FIG. 6 shows the method of fixing a cage 14 on the shell 2 of the mill.
  • the outer flank 31 of the cage 14 is pierced with a frustoconical orifice 32.
  • Under the cage 14 is placed a wedge 33.
  • the wedge 33 and the ferrule 2 are pierced with a hole intended to be opposite the frustoconical orifice 32.
  • annular pieces of frustoconical shape were placed, respectively on the one hand between the external flank 31 and the shim 33 and on the other hand between the ferrule 2 and the nut 36 coming to be screwed to the 'end 37 of the screw 38 whose head 39 is supported on the wall of the frustoconical orifice 32.
  • the annular parts 34,35 can accept a certain deformation in case of expansion of the partition 1 during operation of the mill. This avoids deformation of the shell 2 proper.
  • the inner flank 40 of the cage 14, that is to say that which is closest to the axis 23 of rotation of the ferrule 2 has an inclined profile from the upstream grid 15 to the downstream grid 16.
  • This inclination allows the ground material which has entered the cage 14 passing through the openings 20 of the upstream grid 15 to flow naturally towards the outlet light 41 of the downstream grid 16.
  • the end 42 of the internal flank 40 of the cage 14 has a rounded shape, and the lumen 41 for leaving the material is inclined in the extension of this rounded end 42.
  • the plate 16 comprises two parallel bevel cuts 43, 44, respectively an internal cut 43 at the inner flank 40 and an external cut 44 at the outer flank 45.
  • the inclination ⁇ of the cuts 43.45 relative to the plane 12 forming the interface between two cages is at least 30 °; it was 45 ° in the example illustrated.
  • the invention is not limited to the embodiment which has been described by way of non-exhaustive example but covers all the variants.
  • the partition has three lifting levels. It is possible, without departing from the scope of the invention, to have only two levels of lifting modules or to have more than three levels of lifting modules. This choice depends on the diameter of the mill and the grinding conditions.
  • the central cages 14 can be assembled by welding together.
  • the lifting modules can be bolted directly to the shell.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP92400628A 1991-03-12 1992-03-11 Trennwand für Rohrkugelmühle mit mehreren Hubbereichen für das Mahlgut Withdrawn EP0504041A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103275 1991-03-12
FR9103275A FR2673854B1 (fr) 1991-03-12 1991-03-12 Cloison pour broyeur cylindrique a boulets a plusieurs niveaux de relevage de matieres.

Publications (1)

Publication Number Publication Date
EP0504041A1 true EP0504041A1 (de) 1992-09-16

Family

ID=9410858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400628A Withdrawn EP0504041A1 (de) 1991-03-12 1992-03-11 Trennwand für Rohrkugelmühle mit mehreren Hubbereichen für das Mahlgut

Country Status (4)

Country Link
EP (1) EP0504041A1 (de)
CN (1) CN1069909A (de)
FR (1) FR2673854B1 (de)
WO (1) WO1992016297A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025164A1 (en) * 1993-04-23 1994-11-10 Slegten Societe Anonyme Device for fixing a partition for tube mill and method for this purpose
US5842654A (en) * 1993-04-23 1998-12-01 Slegten Societe Anonyme Device for fixing a partition for tube mill and method for this purpose

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103990520A (zh) * 2014-05-30 2014-08-20 顾开明 一种耐磨损的球磨机用蓖板
CN103990518A (zh) * 2014-05-30 2014-08-20 顾开明 一种球磨机隔仓蓖板
CN104028361A (zh) * 2014-06-28 2014-09-10 山东省章丘鼓风机股份有限公司 一种管磨机的新型出料篦板装置
CN108465519B (zh) * 2018-03-25 2024-07-02 南京腾韬工程技术有限公司 一种水泥球磨机活化装置
JP7424106B2 (ja) * 2020-02-28 2024-01-30 ニデック株式会社 駆動装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE337518C (de) * 1919-05-16 1921-06-02 Fried Krupp Akt Ges Grusonwerk Zwischenwand fuer Verbundrohrmuehlen
US1591941A (en) * 1921-06-09 1926-07-06 Allis Chalmers Mfg Co Comminuting mill
GB262222A (en) * 1925-10-12 1926-12-09 Frank Chamberlain Improvements relating to pan-grates for crushing machines or the like mills for disintegrating solid matter
DE2040663A1 (de) * 1969-09-04 1971-03-11 Dominion Eng Works Ltd Muehle
FR2122251A5 (de) * 1971-01-15 1972-08-25 Smidth & Co As F L
FR2345213A1 (fr) * 1976-03-26 1977-10-21 Polysius Ag Cloison elevatrice pour broyeur tubulaire
US4498634A (en) * 1983-09-01 1985-02-12 Fuller Company Division head for grinding mill

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE337518C (de) * 1919-05-16 1921-06-02 Fried Krupp Akt Ges Grusonwerk Zwischenwand fuer Verbundrohrmuehlen
US1591941A (en) * 1921-06-09 1926-07-06 Allis Chalmers Mfg Co Comminuting mill
GB262222A (en) * 1925-10-12 1926-12-09 Frank Chamberlain Improvements relating to pan-grates for crushing machines or the like mills for disintegrating solid matter
DE2040663A1 (de) * 1969-09-04 1971-03-11 Dominion Eng Works Ltd Muehle
FR2122251A5 (de) * 1971-01-15 1972-08-25 Smidth & Co As F L
FR2345213A1 (fr) * 1976-03-26 1977-10-21 Polysius Ag Cloison elevatrice pour broyeur tubulaire
US4498634A (en) * 1983-09-01 1985-02-12 Fuller Company Division head for grinding mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025164A1 (en) * 1993-04-23 1994-11-10 Slegten Societe Anonyme Device for fixing a partition for tube mill and method for this purpose
TR27806A (tr) * 1993-04-23 1995-08-29 Slegten Sa Tüp tipi degirmen icin bir bölmenin tespitine yönelik düzenek ve bu gaye icin metod.
US5842654A (en) * 1993-04-23 1998-12-01 Slegten Societe Anonyme Device for fixing a partition for tube mill and method for this purpose

Also Published As

Publication number Publication date
CN1069909A (zh) 1993-03-17
WO1992016297A1 (fr) 1992-10-01
FR2673854B1 (fr) 1993-07-16
FR2673854A1 (fr) 1992-09-18

Similar Documents

Publication Publication Date Title
EP0998353B1 (de) Rohrmühle
EP0276848B1 (de) Rotierender Brecher mit geschützten Schleuderradschaufeln
EP1783780B1 (de) Druckwasserkernreaktor-Druckgefäß
EP0504041A1 (de) Trennwand für Rohrkugelmühle mit mehreren Hubbereichen für das Mahlgut
EP0645190B1 (de) Hubelement für Rohrmühle und Rohrmühle versehen mit solchen Elementen
WO2004113794A1 (fr) Chambre de combustion annulaire de turbomachine
FR2538268A1 (fr) Broyeur tubulaire pour le broyage des matieres premieres naturelles et synthetiques, en particulier pour l'industrie du ciment
EP0159961B1 (de) Flüssigkeitsfilter unter Verwendung von gestapelten Ringen
EP2665922B1 (de) Spiralgehäuse für pelton turbo-arbeitsmaschinen
EP2363017A1 (de) Häckselvorrichtung für Pflanzen
LU88246A1 (fr) Procédé de fabrication de pièces d'usure composite et pièces réalisées par ce procédé
CA2285654C (fr) Perfectionnements aux broyeurs a piste annulaire et rouleau
EP1292394A1 (de) Auskleidung für drehtrommelmühle
EP0351305B1 (de) Trennungswand für eine zylindrische Kugelmühle
EP2266768A1 (de) Broyeur de végétaux pour la production de plaquettes ou particules de bois
BE1007890A3 (fr) Elements de blindage pour broyeur rotatif et broyeur equipe de tels elements.
WO1999042217A1 (fr) Broyeur travaillant en voie humide muni d'une cloison et cloison de sortie destinee au broyeur
FR2610218A1 (fr) Concasseur rotatif a projection
FR2817173A1 (fr) Corps broyant presentant des portions concaves
EP1166876A1 (de) Auskleidung für Drehtrommelmühle
FR3100920A1 (fr) Méthode et ensemble de réparation d’un générateur de vapeur d’un réacteur nucléaire
CH657074A5 (fr) Paroi a fentes pour broyeur tubulaire.
EP0388294A2 (de) Verschleissplatte für Kugelmühlen
CH603244A5 (en) Sifting grinding balls of cement grinder
BE492078A (de)

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: A1

Designated state(s): AT BE CH DE DK ES GB GR IT LI LU NL PT SE

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930318