EP1292394B1 - Auskleidung für drehtrommelmühle - Google Patents

Auskleidung für drehtrommelmühle Download PDF

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Publication number
EP1292394B1
EP1292394B1 EP01947375A EP01947375A EP1292394B1 EP 1292394 B1 EP1292394 B1 EP 1292394B1 EP 01947375 A EP01947375 A EP 01947375A EP 01947375 A EP01947375 A EP 01947375A EP 1292394 B1 EP1292394 B1 EP 1292394B1
Authority
EP
European Patent Office
Prior art keywords
fin
lining according
mill
deflectors
grinding mill
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
EP01947375A
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English (en)
French (fr)
Other versions
EP1292394A1 (de
Inventor
Robert Schneider
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.)
Comigam Ltd
Original Assignee
Comigam Ltd
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
Priority claimed from EP00202178A external-priority patent/EP1166876A1/de
Application filed by Comigam Ltd filed Critical Comigam Ltd
Priority to EP01947375A priority Critical patent/EP1292394B1/de
Publication of EP1292394A1 publication Critical patent/EP1292394A1/de
Application granted granted Critical
Publication of EP1292394B1 publication Critical patent/EP1292394B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C17/22—Lining for containers

Definitions

  • the present invention relates to a shield for a rotary tubular mill comprising a cylindrical shell for containing the material to be ground and a load of grinding machines, wherein the shield consists of rings of individual shielding plates juxtaposed.
  • the invention relates more particularly to grinders used for the grinding of cement (clinker) dry, coal, limestone and ores dry or wet.
  • These grinders consist of a cylindrical metal shell rotating about its longitudinal axis and containing a grinding charge consisting of grinding apparatus, generally balls, but may also consist of cylpebs, boulpebs, etc., of varying sizes.
  • the material to be ground is introduced on one side of the mill and, as it progresses towards the outlet, on the opposite side, it is crushed and milled between the grinding machines.
  • a conventional mill is generally divided, in the axial direction, by means of a dividing partition wall into two successive chambers.
  • the first chamber in which the rough crushing of the material is carried out contains grinding balls generally having a diameter of between 60 mm and 90 mm.
  • the second chamber, in which the fine grinding is carried out contains grinding balls with a diameter generally between 15 mm and 60 mm.
  • Next to these two-chamber mills there are also mills at one only chamber which contain grinding machines of different diameters and in different quantities according to the diameter.
  • These shieldings are, in addition, very sensitive to grains, that is to say when there is a certain accumulation of very hard grains (about 6 to 12 mm) in the areas where small grinding machines are located, the classification is very disturbed, up to the opposite classification, that is to say the return of small gear to the entrance and large gear to the exit.
  • the plates have corrugations which can be inclined at an angle of 15 to 30 ° with respect to the generatrix of the mill.
  • the purpose of the inclination of these corrugations is to create a screw effect to act on the grinding load and the material to grind. Indeed, when the mill rotates, the large grinding gear is generally found, in the majority of the periphery of the grinding load and the purpose of the inclination of the corrugations is to push these grinding gear by screw effect to the input of the grinding chamber.
  • the classification sought in this way is however very difficult and often random.
  • the plates are also relatively heavy and the ranking effect decreases as the wear of the corrugations increases.
  • the object of the present invention is to provide a new shield for a tubular mill that eliminates or at least reduce the disadvantages of conventional shields, specifically a grinder with a lighter shield that allows to create a good ranking which is efficient and flexible to use.
  • the present invention provides a tubular mill of the kind described in the preamble which is characterized in that a number of shielding plates located at selected locations are formed as baffles comprising a field-mounted vane. on a base plate attached to the shell and forming an angle less than 25 ° with respect to a diametral plane of the mill.
  • the side side of the fin on the front side, seen in the direction of rotation of the mill, is preferably bevelled, this bevel is provided on the side facing the mill inlet.
  • This beveled lateral side of the fin is, with respect to the direction of advancement of the material, set back from the opposite lateral side.
  • This inclination of the fins which is preferably greater than 5 °, thus creates a propeller effect which promotes the progression of the material and contributes to the classification of grinding machinery.
  • the fin may form an integral part of the base plate and be made together therewith by casting.
  • the fin may also be a separate piece, integral with a base provided with a hole to be fixed to the ferrule of the mill.
  • This base may have a frustoconical periphery which can penetrate into a complementary shape opening of a base plate.
  • each deflector comprises a base plate 22 provided with a central hole 24 to be fixed on the inner wall of the mill shell.
  • a fin 26 which is erected from the field on the plate 22, preferably perpendicular to it.
  • This fin 26 may have a thickness of between 25 and 50 mm and a height (radial relative to the mill) preferably between 100 and 350 mm.
  • each fin 26 is inclined with respect to a diametral plane of the mill of an angle ⁇ less than 25 °, preferably between 5 ° and 25 ° according to the operating conditions of the mill and the nature of the grinding load and the material to be grinded.
  • the lateral side of the fin 26 which is on the front side, seen in the direction of rotation of the mill, is beveled, in the embodiment of the invention.
  • Figures 1 and 2 on the face of the fin 26 which is turned towards the entrance of the mill to form a more or less acute edge 28. This edge 28 facilitates penetration into the load and contributes to continuous lifting, that is to say prevents the projection of grinding gear on the shield.
  • the fins 26 will generally be made of very hard cast iron or steel if the working conditions of grinding are harder, for example when using grinding balls of 90 mm diameter.
  • the working side of these deflectors that is to say the face turned towards the exit of the grinder (to the right on the figure 1 ), as well as the edge 28 can be made more resistant to abrasion wear by using "padding" (that is to say a mixture of metal and ceramic material).
  • These areas can also be protected by very hard tungsten carbide welding beads, for example.
  • the figures 3 , 4 and 5 show, each, a part of the crusher of the mill in development and with different examples of placement of the deflectors.
  • the arrow R denotes the direction of rotation of the mill whereas the arrow D designates the direction of movement of the material to be ground.
  • the plates designated A are conventional normal plates, while the plates designated B are plates designed in accordance with the present invention as baffles.
  • each deflector B is adjacent to another deflector B at the two diametrically opposite corners to thereby define a complete or partial spiral around the inside of the ferrule.
  • the figure 4 shows a configuration similar to that of the figure 3 with the difference that between a deflector B and two adjacent deflectors of the same spiral is a longitudinal row of plates A without reflectors.
  • the figure 5 shows an example of a configuration similar to that of the figure 4 , but here each deflector B is separated from neighboring baffles of the same spiral by a diametral row of plate without baffles. It should be noted that, in this configuration, the axial spacing between two adjacent deflectors is greater than in the configurations of figures 3 and 4 .
  • the number of deflectors can vary between 5% and 15% of the total number of armor plates.
  • the figure 6 shows the complete development of a mill shell of 4 meters in diameter and 10 meters long.
  • the baffles are spirally arranged in the mill according to the configuration of the figure 3 .
  • the larger grinding machines therefore roll faster than the smaller grinding machines on the foot of the grinding load, that is to say from the back of the grinder to its entrance.
  • This process of classification of grinding bodies is very effective. It has, on the other hand, another great advantage because the degree of filling increases from the inlet to the outlet. It is known, in fact, that the best grinding efficiency is obtained when the voids between the grinding bodies (more or less 41%) are filled with material and that the material to grind, while advancing in the grinder, "swells" (c that is, its apparent density decreases). It is therefore advantageous to have a higher degree of filling at the outlet of the mill to optimize the grinding efficiency.
  • Another advantage is that the material to be ground is pushed more quickly through the mill and there is, thanks to these baffles, a better mixing between the grinding machinery and the material to be grinded.
  • the deflector shown on the Figures 1 and 2 is a monobloc piece made by casting.
  • a embodiment with a composite baffle will be described below with reference to the following figures.
  • This composite deflector generally designated by the reference 30 on the figure 7 , has a fin 36 comparable to the fin 26 of Figures 1 and 2 but provided, at its base, a base 34 which, in the embodiment shown, has a square shape.
  • the base 34 and the fin 36 form a single piece that can be made by casting but separated from the base plate 32.
  • This base plate has an opening 40 of complementary shape to that of the base 34 and forming a frame for receiving this one. this.
  • the base 34 and the opening 40 of the base plate 32 have complementary frustoconical sections, so that when the base 34 is disposed in its housing of the base plate 32 and is fixed through its fixing hole 38, at the mill shell, the base plate 32 is held in place by the base 34 and no longer needs to be attached to the ferrule.
  • filling pieces 42 represented on the Figures 10 and 11 .
  • These filling pieces 42 have exactly the same shape and the same section as the pedestals 34 shown on the Figures 7 to 9 but do not have fins 36.
  • These parts make it possible to fill the openings 40 in the base plates 32 when it is desired to eliminate, as desired, certain deflectors 30 shown on the FIG. Figures 7 to 9 . It suffices, in fact, to unbolt the base 34, remove it with its fin 36, close the opening with the filling piece 42 and bolt it to the shell through its central opening 44.
  • the fins 26 and 36 shown in the various figures are suitable, because of their beveled edge 28, for a grinder rotating in the direction indicated on them. figures 1 and 3 to 5 . In a grinder rotating in the opposite direction, it is necessary to provide deflectors which are symmetrical with respect to those shown in the figures.
  • Standard base plates generally have an average thickness of ⁇ 40 mm, i.e. a standard DIN plate (314.16 x 250 mm) has a weight of the order of 24 kg.
  • a standard DIN plate 314.16 x 250 mm
  • the whole of a fin and a base weighs a maximum of 25 kg. Therefore, from the point of view of ergonomics and safety when fitting the shield, the deflectors proposed do not constitute a handicap.
  • the comparison shows a weight reduction of almost 25%.
  • the weight per m 2 would be 366 kg corresponding to a total weight of ⁇ 55 200 kg, that is to say a decrease of the order of 20%.
  • a standard classifying shield one is sometimes faced with the problem that one can not absorb all the available power of the motor driving the crusher. This is due to the average thickness of these shields which reduces the useful internal volume of the mill.
  • the Figures 12 and 13 show a part of the grinder shell, in development with an embodiment in which the deflectors of the plates B are oriented in the opposite direction of the embodiment of the preceding figures. If the fins are always inclined at an angle between 5 ° and 25 ° relative to a diametral plane, this inclination is, according to the Figures 12 and 13 , in the direction of the exit of the mill, that is to say that the lateral side of attack, seen in the direction of the rotation, which is also the beveled side, is this time closer to the exit of the grinder than the opposite side.
  • the baffles are, moreover, bevelled on the face of the fin which is turned towards the exit of the mill and not on the opposite face as in the embodiment of the preceding figures.
  • the mutual arrangement of the different deflectors B is, however, always made with the aim of obtaining a configuration in the form of a spiral whose inclination may, however, vary as shown by the comparison between the Figures 12 and 13 .
  • the deflectors B are associated in pairs in successive adjacent rings.
  • the fins of two adjacent deflectors B of the same ring are disposed, one of the inlet side of the deflector and the other of the outlet side of the deflector.
  • the deflectors of Figures 12 and 13 can be either monobloc castings as illustrated on the Figures 1 and 2 , or composite parts according to the Figures 7 to 11 .
  • the working side of the fins in the Figures 12 and 13 (which this time is the face turned towards the entrance of the mill) can be worked or include incrustations to increase its resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Milling Processes (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (13)

  1. Panzerung für ein rohrförmiges, drehbares Brecherwerk, welche einen zylindrischen Mantelring aufweist, welcher dazu bestimmt ist zu zerkleinerndes Material sowie eine Ladung von Zerkleinerungsmitteln zu enthalten, Brecherwerk bei welchem die Panzerung aus individuellen, nebeneinander angeordneten Ringen von Panzerplatten besteht, bei welchem eine gewisse Anzahl von sich an ausgewählten Stellen befindlichen Panzerplatten ausgelegt ist unter der Form von Deflektoren (20, 30) mit einem auf einer Basisplatte (22, 32) hochkantig aufgerichteten und an dem Mantelring befestigten Flügel (26, 36), welcher einen Winkel von weniger als 25° in Bezug auf eine diametral zum Brecher verlaufende Ebene begrenzt und bei welchem die Positionen der Deflektoren (20, 30) derart ausgewählt sind, dass die Gesamtheit der Deflektoren eine die Form einer Spirale aufweisende Konfiguration besitzt.
  2. Panzerung gemäß dem Anspruch 1, dadurch gekennzeichnet, dass der Flügel (26, 36) eines jeden Deflektors (20, 30) einen zwischen 5° und 25° liegenden Winkel in Bezug auf eine diametral zum Brecher verlaufende Ebene bildet.
  3. Panzerung gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der seitliche Teil des Flügels (26, 36), der sich, in der Drehrichtung des Brechers gesehen, an der Vorderseite befindet, abgeschrägt ist, um eine scharfe Kante (28) zu bilden, wobei die Abschrägung an der Seite vorgesehen ist, die dem Eingang in den Brecher zugekehrt ist.
  4. Panzerung gemäß dem Anspruch 3, dadurch gekennzeichnet, dass die Abschrägung auf der Seite des Flügels vorgesehen ist, die dem Eingang in den Brecher zugekehrt ist.
  5. Panzerung gemäß irgendeinem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass der seitliche, abgeschrägte Teil des Flügels (26, 36), in Bezug auf die Richtung der Vorwärtsbewegung des zu zerkleinernden Materials, gegenüber dem entgegengesetzten seitlichen Teil zurückspringend ist.
  6. Panzerung gemäß dem Anspruch 3, dadurch gekennzeichnet, dass die Abschrägung auf der Seite des Flügels vorgesehen ist, die dem Ausgang aus dem Brecher zugekehrt ist.
  7. Panzerung gemäß irgendeinem der Ansprüche 3 oder 6, dadurch gekennzeichnet, dass der seitliche, abgeschrägte Teil des Flügels (26, 36) sich, in Bezug auf die Richtung der Vorwärtsbewegung des zu zerkleinernden Materials, vor dem entgegengesetzten seitlichen Teil befindet.
  8. Panzerung gemäß irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Flügel (26) einen integrierten Bestandteil der Basisplatte (22) bildet und zusammen mit dieser durch Giessen hergestellt wird.
  9. Panzerung gemäß irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Deflektor (30) aus einem Verbundwerkstück besteht, das einen Flügel (36) mit einem Sockel (34) umfasst, welch letzterer in eine Öffnung (40) in der Basisplatte (32) eingeführt ist, wobei die Öffnung (40) eine komplementäre Form zu derjenigen des Sockels (34) besitzt.
  10. Panzerung gemäß Anspruch 9, dadurch gekennzeichnet, dass der Sockel (34) und die Öffnung (40) komplementäre kegelstumpfähnliche Formen aufweisen, derart dass die Basisplatte (32) durch den Sockel (34) an ihrem Platz gehalten wird wenn der letztere mit Bolzen an dem Mantelring des Brechers befestigt wird.
  11. Panzerung gemäß einem der Ansprüche 9 oder 10, gekennzeichnet durch Ausfüllungsstücke (42), welche die gleiche Form aufweisen wie diejenige eines Sockels (34) eines Flügels (36) und welche dazu bestimmt sind letztere in einer Basisplatte (32) zu ersetzen.
  12. Panzerung gemäß irgendeinem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die arbeitende Fläche der Flügel (26, 36) sowie die Kante (28) keramische Inkrustationen aufweisen, um den Widerstand gegenüber dem Abrieb herauf zu setzen.
  13. Rohrförmiges, drehbares Brecherwerk mit einer Panzerung gemäß irgendeinem der Ansprüche 1 bis 12.
EP01947375A 2000-06-23 2001-06-14 Auskleidung für drehtrommelmühle Expired - Lifetime EP1292394B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01947375A EP1292394B1 (de) 2000-06-23 2001-06-14 Auskleidung für drehtrommelmühle

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP00202178 2000-06-23
EP00202178A EP1166876A1 (de) 2000-06-23 2000-06-23 Auskleidung für Drehtrommelmühle
LU90653 2000-10-18
LU90653 2000-10-18
EP01947375A EP1292394B1 (de) 2000-06-23 2001-06-14 Auskleidung für drehtrommelmühle
PCT/EP2001/006867 WO2001097975A1 (fr) 2000-06-23 2001-06-14 Blindage pour broyeur tubulaire rotatif

Publications (2)

Publication Number Publication Date
EP1292394A1 EP1292394A1 (de) 2003-03-19
EP1292394B1 true EP1292394B1 (de) 2008-09-03

Family

ID=26072398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01947375A Expired - Lifetime EP1292394B1 (de) 2000-06-23 2001-06-14 Auskleidung für drehtrommelmühle

Country Status (18)

Country Link
US (1) US6951315B2 (de)
EP (1) EP1292394B1 (de)
JP (1) JP2003535690A (de)
KR (1) KR100754645B1 (de)
CN (1) CN1305575C (de)
AT (1) ATE406958T1 (de)
AU (2) AU6907901A (de)
BR (1) BR0111794B1 (de)
CA (1) CA2413342A1 (de)
CZ (1) CZ298084B6 (de)
DE (1) DE60135651D1 (de)
ES (1) ES2312452T3 (de)
HU (1) HU228663B1 (de)
MX (1) MXPA02012720A (de)
PL (1) PL198458B1 (de)
PT (1) PT1292394E (de)
RU (1) RU2266789C2 (de)
WO (1) WO2001097975A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895286B1 (fr) 2005-12-23 2008-05-09 Solvay Procede de broyage
KR101035336B1 (ko) * 2008-04-28 2011-05-20 주식회사 비엠지코리아 로스터 후드
CN105772172A (zh) * 2014-12-22 2016-07-20 佛山市宝航机械装备行业知识产权服务有限公司 一种均匀研磨的高效球磨机
US10370129B2 (en) 2015-08-17 2019-08-06 Dash Llc Assemblies including plug devices, and related plug devices and methods
EP3932559B1 (de) * 2020-06-29 2024-02-21 Metso Finland Oy Konkaven-haltesystem für hydraulischen brecher

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE833892C (de) 1947-11-18 1952-03-13 Fischer Ag Georg Panzerplatten-Auskleidung fuer Rohrmuehlen
US4211370A (en) * 1978-11-24 1980-07-08 Midland-Ross Corporation Lining for grinding mills
SE433930B (sv) * 1981-06-18 1984-06-25 Rigello Pak Ab Oppningsanordning for burkar eller behallare
US4515319A (en) * 1982-07-08 1985-05-07 Wei Yun Song Dual-inclined lifters for autogenous mills
SU1144719A1 (ru) * 1983-03-17 1985-03-15 Montvila Vintsas V Бронефутеровка трубной мельницы
CN2144023Y (zh) * 1992-01-22 1993-10-20 王大年 球磨机角锥形衬板
CN2186605Y (zh) * 1994-03-01 1995-01-04 张洪彬 双螺线分级沟槽衬板

Also Published As

Publication number Publication date
KR100754645B1 (ko) 2007-09-05
MXPA02012720A (es) 2004-09-10
CN1305575C (zh) 2007-03-21
PL198458B1 (pl) 2008-06-30
RU2266789C2 (ru) 2005-12-27
JP2003535690A (ja) 2003-12-02
US6951315B2 (en) 2005-10-04
AU2001269079B2 (en) 2005-02-10
KR20030026250A (ko) 2003-03-31
WO2001097975A1 (fr) 2001-12-27
AU6907901A (en) 2002-01-02
EP1292394A1 (de) 2003-03-19
CZ20024234A3 (cs) 2003-04-16
BR0111794A (pt) 2003-05-27
CZ298084B6 (cs) 2007-06-13
ATE406958T1 (de) 2008-09-15
CN1437509A (zh) 2003-08-20
ES2312452T3 (es) 2009-03-01
HUP0301539A2 (en) 2003-08-28
PT1292394E (pt) 2008-11-28
PL358740A1 (en) 2004-08-09
US20040113004A1 (en) 2004-06-17
BR0111794B1 (pt) 2012-12-11
HU228663B1 (hu) 2013-05-28
DE60135651D1 (de) 2008-10-16
CA2413342A1 (fr) 2001-12-27

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