US3202364A - Method of and apparatus for grinding material - Google Patents

Method of and apparatus for grinding material Download PDF

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Publication number
US3202364A
US3202364A US232436A US23243662A US3202364A US 3202364 A US3202364 A US 3202364A US 232436 A US232436 A US 232436A US 23243662 A US23243662 A US 23243662A US 3202364 A US3202364 A US 3202364A
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US
United States
Prior art keywords
drum
grinding
grinding elements
walls
ground
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
US232436A
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English (en)
Inventor
Wieland Walter
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.)
Cementfabrik Holderbank-Wildegg AG
Original Assignee
Cementfabrik Holderbank-Wildegg 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 Cementfabrik Holderbank-Wildegg AG filed Critical Cementfabrik Holderbank-Wildegg AG
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Publication of US3202364A publication Critical patent/US3202364A/en
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    • 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
    • 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
    • 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
    • B02C17/002—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 rotary cutting or beating elements
    • 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
    • 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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge

Definitions

  • FIGURE 1 is an axial longitudinal section through the apparatus
  • FIGURE 2 is a section on the line Il1I of FIGURE 1, and
  • the drum 2 can be driven by means generally indicated by a motor 17 at a rotational speed which differs from the rotational speed of the other drum, or it can be held fast by a brake 17
  • the chamber 3 is filled with grinding elements 18 in the form of balls which form a layer disposed annularly about the drum 2 and contacting the drum 1 and also the drum 2.
  • the material to be ground is introduced through the hollow stub shaft 8, first of all passes into an inlet space 20 bounded axially within the drum 1 by the end plate 6 and a partition Wall 19 and thence through apertures 21 formed in the drum 2 into the annular chamber 3, i.e., into the grinding chamber.
  • the ground material is passed through apertures 22 formed in the vicinity aaadosa of the end plate '7 in the drum 2 into an outlet space 24 which is situated within the drum 2 and is bounded in the axial direction by the end plate 7 and a further partition wall 23, and the said ground material is discharged thence through the hollow stub shaft 9.
  • air can be blown through the apparatus for cooling and conveying purposes.
  • the relative rotational movement of the drum 1 with respect to the drum 2 is maintained either by rotating the drums l and 2 at difierent speeds in the same or in opposite direction or by rotating only one of the drums while the other drum is held fast.
  • the drums 1 and 2 thus form two walls parallel to one another which carry out a relative movement with respect to one another in the tangential direction. Owing to friction between the grinding elements and these walls, the grinding elements contacting one another are constrainedly given a relative movement with respect to one another in the layer formed of such grinding elements 18 and filling the chamber 3 between these Walls.
  • the drums I and 2 are provided at their surfaces facing toward the grinding elements 18 with projections for increasing friction, these projections consisting in longitudinal ribs 25 and 26 respectively.
  • these ribs it would also be possible to use different types of irregularities at the drum surfaces.
  • the projections 26 provided at the inner drum 2 are of particular importance.
  • the intensity of the grinding pressure can be influenced by varying the amount of filling, and in this way can be adapted to the grindability of the material. The more densely the grinding chamber is filled with grinding balls or material, the greater does the grinding pressure become.
  • the apparatus can also be operated with the inner drum being 'rotated and the outer drum being held fast.
  • FIGURE 3 shows fundamentally the same layout as that shown in FIG- URES 1 and 2. The only difference is that in this constructional form the inner drum 2 is cooled by means of a cooling liquid.
  • An annular wall 27 arranged within the drum 2 forms with the partitions I9 and 23 a cooling jacket 22; which is connected to a source of cooling medium (not shown) by a pipe 29 extending through the stub shaft 9.
  • a pipe 3t which is led through the stub shaft 8 and is arranged at the opposite side discharges the cooling medium from the jacket 28. In this way effective cooling can be obtained even with a high grinding output.
  • the illustrated apparatus is also suitable for self-generated grinding, relatively large pieces of the material to be comminuted being used as grinding elements.
  • the method of grinding material comprising the steps of forming a layer of movable grinding elements in an annular space whose inner and outer peripheries are defined by a pair of radially spaced, coaxial, circular cylindrical walls; accelerating said wails at the same rate to the same predetermined angular velocity about their longitudinal axes; braking one of said walls to thereby bring it to rest and produce relative movement between the grinding elements; admixing the material to be ground with said layer of grinding elements so that it is ground by the relative movement of those elements in relation to one another; and discharging the ground material from said layer.
  • An apparatus for grinding material comprising a pair of walls spaced from each other to define an intervening space of substantially uniform thickness; means closing opposite ends of said space; a layer of movable grinding elements filling said space, part of said elements being situated immediately adjacent one of said walls, another part being situated immediately adjacent the other of said Walls, and the remaining part being situated between said first named parts; means for moving said walls relatively to each other in the tangential direction; projections carried by at least one of said walls and penetrating into said layer to the depth of the grinding elements situated immediately adjacent the wall so as to prevent movement of the last named grinding elements relatively to the adjacent wall in the tangential direction; and means for adding the material to be ground to said layer and for discharging the ground material from said layer.
  • An apparatus for grinding material comprising inner and outer drums having coaxial surfaces of revolution spaced radially from each other to define an intervening annular chamber; means closing opposite ends of said chamber; a layer of grinding elements filling said chamber, an inner part of said elements being situated immediately adjacent the inner drum, an outer part being situated immediately adjacent the outer drum, and the remaining part being situated between the inner and outer parts; means for rotating at least one of said drums so as to effect relative rotation with respect to the other drum; projections carried by at least the inner drum and penetrating into the layer of grinding elements to the depth of the grinding elements situated immediately adjacent the drum so as to prevent displacement of the last named elements relatively to the adjacent drum in the circumferential direction; and means for adding the material to be ground to said layer and for discharging the ground material from said layer.
  • the inner FOREIGN PATENTS drum comprises an interior cooling jacket; and supply 24127 2/19 Denmark and discharge pipes for a cooling medium connected to said cooling jacket and extending through said hollow 469535 12/28 Germany 957,540 2/57 Germany. Shaft ends 5 468,812 7/37 Great Britain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US232436A 1961-11-03 1962-10-23 Method of and apparatus for grinding material Expired - Lifetime US3202364A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1269161A CH392222A (de) 1961-11-03 1961-11-03 Verfahren und Einrichtung zur Vermahlung von Material vermittels beweglicher Mahlkörper
CH1241663A CH407714A (de) 1961-11-03 1963-10-08 Vorrichtung zum Vermahlen von Material mittels beweglicher Mahlkörper

Publications (1)

Publication Number Publication Date
US3202364A true US3202364A (en) 1965-08-24

Family

ID=25710201

Family Applications (1)

Application Number Title Priority Date Filing Date
US232436A Expired - Lifetime US3202364A (en) 1961-11-03 1962-10-23 Method of and apparatus for grinding material

Country Status (5)

Country Link
US (1) US3202364A (de)
BE (2) BE652483A (de)
CH (2) CH392222A (de)
DE (1) DE1200656B (de)
FR (2) FR1341044A (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556416A (en) * 1968-06-28 1971-01-19 Huber Corp J M Apparatus for shearing solids in a solids-liquid suspension
US3667688A (en) * 1968-06-28 1972-06-06 Huber Corp J M Method for shearing solids in a solids-liquid suspension
US3993254A (en) * 1973-09-28 1976-11-23 Gebruder Netzsch, Maschinenfabrik Agitator mill
US4440351A (en) * 1981-12-21 1984-04-03 Allis-Chalmers Corporation Apparatus for delivering fluid to a rotating body
US4582266A (en) * 1982-09-23 1986-04-15 Epworth Manufacturing Co., Inc. Centrifugal media mill
US4634134A (en) * 1985-05-08 1987-01-06 Epworth Manufacturing Co., Inc. Mechanical seal
US4746069A (en) * 1982-09-23 1988-05-24 Epworth Manufacturing Co., Inc. Centrifugal media mill
US4776522A (en) * 1984-08-29 1988-10-11 Reimbold & Strick Gmbh & Co. Annular gap-type ball mill
FR2631253A1 (fr) * 1988-05-16 1989-11-17 Vernijura Sa Procede de broyage et dispersion d'un produit ou d'un melange et installation pour la mise en oeuvre du procede
EP0475015A1 (de) * 1990-09-14 1992-03-18 FRYMA-Maschinen AG Verfahren und Vorrichtung zum kontinuierlichen Feinzerkleinern und Dispergieren von Feststoffen in Flüssigkeit
US5346145A (en) * 1991-12-13 1994-09-13 Inoue Mfg., Inc. Dispersing and grinding apparatus
EP0704245A1 (de) * 1994-09-28 1996-04-03 Mitsubishi Jukogyo Kabushiki Kaisha Feinzerkleinerungsverfahren unter Verwendung einer horizontalen Mühle und horizontale Mühle
WO1996033019A1 (de) * 1995-04-21 1996-10-24 Friedrich Vock Verfahren und vorrichtung zum nassmahlen und dispergieren von feststoffpartikeln in flüssigkeiten
US20160318027A1 (en) * 2015-04-16 2016-11-03 Netzsch-Feinmahltechnik Gmbh Agitator ball mill

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3249914C2 (de) * 1982-12-10 1993-06-03 Buehler Ag, Uzwil, Ch
DE3249964C2 (en) * 1982-12-10 1991-12-19 Buehler Ag, Uzwil, Ch Ball mill with vertically mounted rotor
DE3249928C3 (de) * 1982-12-10 1995-06-29 Buehler Ag Geb Rührwerksmühle
DE3431142C2 (de) * 1984-08-24 1994-09-22 Fryma Masch Ag Mühle
DE3440993A1 (de) * 1984-11-09 1986-05-22 Omya GmbH, 5000 Köln Ruehrwerksmuehle, insbesondere ruehrwerkskugelmuehle
DE3504584A1 (de) * 1985-02-11 1986-08-21 Krupp Polysius Ag, 4720 Beckum Anlage zur zerkleinerung von mahlgut
DE3838981A1 (de) * 1988-11-18 1990-05-23 Eirich Walter Ruehrwerkskugelmuehle
DE19642056A1 (de) * 1996-10-11 1998-04-16 Krupp Polysius Ag Trommelmühle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1370259A (en) * 1920-02-04 1921-03-01 Gilbert H Beesmyer Ball-mill
DE469535C (de) * 1924-08-16 1928-12-18 Hermann Hildebrandt Verfahren und Vorrichtung zum Zerkleinern und Mischen von Gut
GB468812A (en) * 1935-06-25 1937-07-13 Wilhelm Steinmann Improvements in apparatus for treating animal matter such as carcasses, slaughter house offal, fish offal and the like
US2466443A (en) * 1944-06-19 1949-04-05 Geneva Processes Inc Apparatus for producing finely divided particles
DE957540C (de) * 1953-09-13 1957-02-07 Draiswerke Ges Mit Beschraenkt Walze, insbesondere fuer Reibwalzenmuehlen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE170570C (de) *
FR576368A (fr) * 1924-01-26 1924-08-20 Broyeur
FR29220E (fr) * 1924-08-19 1925-07-09 Broyeur
GB422628A (en) * 1933-07-13 1935-01-14 Whiston Alfred Bristow Improvements relating to the reduction of solid substances to a finely divided state
DE642127C (de) * 1935-07-14 1937-02-24 Manuel Godinez Muehle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1370259A (en) * 1920-02-04 1921-03-01 Gilbert H Beesmyer Ball-mill
DE469535C (de) * 1924-08-16 1928-12-18 Hermann Hildebrandt Verfahren und Vorrichtung zum Zerkleinern und Mischen von Gut
GB468812A (en) * 1935-06-25 1937-07-13 Wilhelm Steinmann Improvements in apparatus for treating animal matter such as carcasses, slaughter house offal, fish offal and the like
US2466443A (en) * 1944-06-19 1949-04-05 Geneva Processes Inc Apparatus for producing finely divided particles
DE957540C (de) * 1953-09-13 1957-02-07 Draiswerke Ges Mit Beschraenkt Walze, insbesondere fuer Reibwalzenmuehlen

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556416A (en) * 1968-06-28 1971-01-19 Huber Corp J M Apparatus for shearing solids in a solids-liquid suspension
US3667688A (en) * 1968-06-28 1972-06-06 Huber Corp J M Method for shearing solids in a solids-liquid suspension
US3993254A (en) * 1973-09-28 1976-11-23 Gebruder Netzsch, Maschinenfabrik Agitator mill
US4440351A (en) * 1981-12-21 1984-04-03 Allis-Chalmers Corporation Apparatus for delivering fluid to a rotating body
US4582266A (en) * 1982-09-23 1986-04-15 Epworth Manufacturing Co., Inc. Centrifugal media mill
US4746069A (en) * 1982-09-23 1988-05-24 Epworth Manufacturing Co., Inc. Centrifugal media mill
US4776522A (en) * 1984-08-29 1988-10-11 Reimbold & Strick Gmbh & Co. Annular gap-type ball mill
US4634134A (en) * 1985-05-08 1987-01-06 Epworth Manufacturing Co., Inc. Mechanical seal
FR2631253A1 (fr) * 1988-05-16 1989-11-17 Vernijura Sa Procede de broyage et dispersion d'un produit ou d'un melange et installation pour la mise en oeuvre du procede
EP0475015A1 (de) * 1990-09-14 1992-03-18 FRYMA-Maschinen AG Verfahren und Vorrichtung zum kontinuierlichen Feinzerkleinern und Dispergieren von Feststoffen in Flüssigkeit
US5346145A (en) * 1991-12-13 1994-09-13 Inoue Mfg., Inc. Dispersing and grinding apparatus
EP0704245A1 (de) * 1994-09-28 1996-04-03 Mitsubishi Jukogyo Kabushiki Kaisha Feinzerkleinerungsverfahren unter Verwendung einer horizontalen Mühle und horizontale Mühle
US5544818A (en) * 1994-09-28 1996-08-13 Mitsubishi Jukogyo Kabushiki Kaisha Pulverizing method and horizontal mill
WO1996033019A1 (de) * 1995-04-21 1996-10-24 Friedrich Vock Verfahren und vorrichtung zum nassmahlen und dispergieren von feststoffpartikeln in flüssigkeiten
US20160318027A1 (en) * 2015-04-16 2016-11-03 Netzsch-Feinmahltechnik Gmbh Agitator ball mill
US10603669B2 (en) * 2015-04-16 2020-03-31 Netzsch-Feinmahltechnik Gmbh Agitator ball mill

Also Published As

Publication number Publication date
CH392222A (de) 1965-05-15
CH407714A (de) 1966-02-15
FR86283E (de) 1966-03-30
DE1200656B (de) 1965-09-09
BE624266A (de)
BE652483A (de) 1964-12-16
FR1341044A (fr) 1963-10-25

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