EP0714703B1 - A grinding process and a drum lining - Google Patents

A grinding process and a drum lining Download PDF

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Publication number
EP0714703B1
EP0714703B1 EP95850200A EP95850200A EP0714703B1 EP 0714703 B1 EP0714703 B1 EP 0714703B1 EP 95850200 A EP95850200 A EP 95850200A EP 95850200 A EP95850200 A EP 95850200A EP 0714703 B1 EP0714703 B1 EP 0714703B1
Authority
EP
European Patent Office
Prior art keywords
drum
grinding
lining
grinding media
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
EP95850200A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0714703A1 (en
Inventor
Rune LINDSTRÖM
Hakan Stahlbröst
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.)
Skega AB
Original Assignee
Skega AB
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 Skega AB filed Critical Skega AB
Publication of EP0714703A1 publication Critical patent/EP0714703A1/en
Application granted granted Critical
Publication of EP0714703B1 publication Critical patent/EP0714703B1/en
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
    • B02C17/24—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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/02—Centrifugal pendulum-type mills
    • 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
    • B02C17/225—Lining for containers using rubber or elastomeric material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00

Definitions

  • the present invention relates to a method of grinding a batch of process material, particularly ceramic material, together with a multiple of grinding media in a rotary, drivable mill drum which has a lining comprised of polymeric material and which includes lifting devices which are orientated axially in the drum and which project radially down into the drum interior.
  • the invention also relates to a drum lining for use in such grinding methods.
  • One object of the present invention is to develop this known technique, so that it can also be applied to existing grinding mills, particularly mills intended for grinding ceramic materials, which lack the possibility of adjusting the rotational speed of the mill drum or cylinder. This object is achieved by the features set forth in the characterizing clauses of the following dependent Claims.
  • the method is characterized by
  • An inventive mill lining made of polymeric material and intended for a rotary, drivable mill drum for grinding a batch of process material together with a grinding media multiple and including lifting devices which are positioned axially in said drum and project radially down into the drum interior is characterized in that each lifting device includes a high-lift side which as the drum rotates at a constant speed in a first direction during a first time interval is brought into contact with grinding media from said grinding media multiple, such as to grind or disintegrate the process material with a larger crush proportion and a smaller fine-grinding proportion, and further includes a low-lift side which lies opposite to said high-lift side, wherein as the drum rotates at said constant speed in a direction opposite to said first rotational direction in a second time interval following said first time interval, said low-lift side is brought into contact with grinding media in said grinding media multiple so as to grind or disintegrate the process material with a smaller crush proportion and a larger fine-grinding proportion.
  • the invention is based on the concept that, in principle, the same effect as that achieved when rotating the mill at varying speeds can also be achieved by varying the direction of drum rotation and by providing the drum lining with double-acting asymmetric lifting devices which lift the grinding media to different heights in respective directions of rotation.
  • asymmetric lifting devices are known to the art, it is not known to drive such devices in different directions during one and the same mill pass so as to achieve an intentional difference in lifting height in the two different directions of rotation, particularly in mills for grinding ceramic materials.
  • FIG. 1 is a cross-sectional view of part of a mill drum equipped with an inventive mill lining
  • FIG. 2 illustrates the geometrical configuration of a lifting device for an inventive mill lining in larger scale
  • FIG. 3 is a schematic cross-sectional view of an inventive batch mill drum, showing the drum operating in both directions of rotation.
  • FIG. 1 shows part of a mill drum 40 of a batch mill including a lining made of polymeric material and further including a plurality of elongated lining elements 10 which are positioned axially in the drum 40 and placed so as to cover the inner periphery of the drum 40.
  • each lining element 10 When seen in cross-section, each lining element 10 has formed on one side thereof a lifting device 12 which projects radially down into the interior of the drum 40. At one end of the lining element 10, the lifting member 12 is delimited by a high-lift side 14, while the opposite end of said element is delimited by a low-lift side 16.
  • the lifting member 12 has a generally flat upper surface 18 extending between said sides 14 and 16.
  • a fastener profile 28 of a bolt attachment arrangement, generally referenced 30, is inserted into the lining element 10 on the underside of the lifting member 12.
  • the fastener profile 28 has a downwardly facing, elongated slot or channel having flanges which are angled in towards each other, such as to enable the head of a bolt included in said fastener arrangement 30 to be pushed into the slot or channel and there held firmly so as to anchor the lining element 10 to the drum 40, in the manner shown in FIG. 1.
  • the lining element 10 is provided with a recess 26 which lies adjacent the inner surface of the mill drum 40 and which is adapted to overlap and act clampingly in a region 24 of an adjacent end of a nearby lining element 10.
  • the remaining part of the lining element 10 between the region 24 and the lifting member 12 has a generally flat upper side 20 and an upwardly angled side 22 adjacent the region 24.
  • the extension of the recess 26 in the peripheral direction of the drum 20 is such as to enable overlapping of the firmly clamped region 24 located therebetween to be varied.
  • This adjustability permits a given lining element 10 to be given a variable active width which constitutes an integer multiple of the internal periphery of the mill drum.
  • a lining element 10 of one single dimension can be used to line drums of mutually different diameters, by adapting the overlap of the recess 26 so that a given number of lifting devices will be distributed uniformly in the drum 40.
  • the high-lift side 14 has a normal direction N1 which deviates negligibly from a first rotational direction D1 by an angle ⁇ , or which coincides generally with said first rotational direction.
  • the low-lift side 16 opposite to the side 14 has a normal direction N2 which deviates from the opposite rotational direction D2 by an angle ⁇ . It has been found that an angle ⁇ of between about 64 and 84 degrees, and particularly about 74 degrees, is advantageous.
  • FIG. 3 illustrates principly two halves of a mill drum 40 according to the invention in operation with a batch of process material 50 and grinding media 52, wherein the right half of the Figure shows the drum 40 rotating in a first direction at a constant speed v, while the left side of the Figure shows the drum 40 rotating in an opposite direction, also at the constant speed v.
  • the drum 40 when grinding a batch of process material, the drum 40 is rotated in a first direction in the initial time interval or in a time interval which precedes a following time interval, and is then driven in the opposite direction during a terminating time interval or a time interval following said preceding time interval.
  • the duration of the time interval can be determined on the basis of the composition of the process material, and the time intervals may thus vary in relation to one another.
  • Rotation of the batch mill in the opposite direction can easily be achieved with the aid of solutions well known in the field of electric motors, these solutions requiring no modification to existing mechanical drive transmissions, for instance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
EP95850200A 1994-11-30 1995-11-13 A grinding process and a drum lining Expired - Lifetime EP0714703B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404159A SE503673C2 (sv) 1994-11-30 1994-11-30 Malningsförfarande och kvarinfodring
SE9404159 1994-11-30

Publications (2)

Publication Number Publication Date
EP0714703A1 EP0714703A1 (en) 1996-06-05
EP0714703B1 true EP0714703B1 (en) 2000-02-09

Family

ID=20396174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95850200A Expired - Lifetime EP0714703B1 (en) 1994-11-30 1995-11-13 A grinding process and a drum lining

Country Status (11)

Country Link
EP (1) EP0714703B1 (zh)
JP (1) JP3616182B2 (zh)
KR (1) KR100400439B1 (zh)
CN (1) CN1071622C (zh)
AR (1) AR002457A1 (zh)
BR (1) BR9505598A (zh)
DE (1) DE69514996T2 (zh)
ES (1) ES2143610T3 (zh)
MX (1) MX9504956A (zh)
SE (1) SE503673C2 (zh)
TW (1) TW372905B (zh)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1305842B1 (it) 1998-08-24 2001-05-16 Pescale S P A Procedimento,dispositivo ed impianto per il trattamento di pulituradi pezzi irregolari di materiali diversi
IT1307932B1 (it) * 1999-01-27 2001-11-29 Siti Dispositivo per la macinazione di materiali ceramici e impiantocomprendente il dispositivo.
EA010217B1 (ru) * 2005-01-18 2008-06-30 Вулко С.А. Узел вкладыша дробилки
US10668478B2 (en) 2013-09-11 2020-06-02 Distron Manufacturing Co. Multi directional rifling and multi flow variable speed rifling for liner segments for crushers, reclaimers, separators and cleaners for products
CN103612192A (zh) * 2013-11-06 2014-03-05 梧州学院 一种超硬材料的表面研磨抛光方法
CN104175207A (zh) * 2014-08-26 2014-12-03 梧州市旺发新工艺品有限公司 宝石成型机
CN104209850A (zh) * 2014-08-26 2014-12-17 梧州市旺发新工艺品有限公司 宝石抛光机
JP6426593B2 (ja) * 2015-12-16 2018-11-21 株式会社栗本鐵工所 破砕機
EP3414014B1 (en) * 2016-02-08 2022-10-26 Didion Manufacturing Company Multi directional rifling and multi flow variable speed rifling for liner segments for crushers, reclaimers, separators and cleaners for products
CN108405092A (zh) * 2018-05-25 2018-08-17 达州市唐氏铸钢有限公司 一种高效水泥磨磨内结构
CN109702632A (zh) * 2018-12-18 2019-05-03 程郎 一种任意形状金属表面处理工艺
CN113977427B (zh) * 2021-11-06 2022-08-23 江苏彭中科技发展有限公司 一种建筑机械设备用带花边零部件打磨装置
CN117548193B (zh) * 2023-11-09 2024-05-03 江苏中基鸿业矿业科技有限公司 一种用于石英砂的球磨机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE155919C (zh) *
GB200220A (en) * 1922-04-11 1923-07-11 George Thomas Mitchell Improvements in grinding plates for tubular ball mills
DE1126709B (de) * 1960-08-26 1962-03-29 Miag Muehlenbau & Ind Gmbh Rohrmuehle
US3599827A (en) * 1967-12-19 1971-08-17 Trelleborgs Gummifabriks Ab Methods of providing walls with wear-resistant linings
DE8912950U1 (de) * 1989-09-26 1990-01-04 Interthal, Arno, 6347 Angelburg Vorrichtung zum Abrunden und Glätten von gebrochenem und/oder form-behauenem Gestein

Also Published As

Publication number Publication date
SE9404159D0 (sv) 1994-11-30
SE9404159L (sv) 1996-05-31
DE69514996T2 (de) 2000-06-08
SE503673C2 (sv) 1996-07-29
MX9504956A (es) 1997-01-31
EP0714703A1 (en) 1996-06-05
ES2143610T3 (es) 2000-05-16
AR002457A1 (es) 1998-03-25
JPH08206526A (ja) 1996-08-13
KR960016971A (ko) 1996-06-17
JP3616182B2 (ja) 2005-02-02
KR100400439B1 (ko) 2003-12-18
TW372905B (en) 1999-11-01
CN1071622C (zh) 2001-09-26
BR9505598A (pt) 1997-11-04
CN1133220A (zh) 1996-10-16
DE69514996D1 (de) 2000-03-16

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