US3392924A - Multichamber mill - Google Patents

Multichamber mill Download PDF

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Publication number
US3392924A
US3392924A US547398A US54739866A US3392924A US 3392924 A US3392924 A US 3392924A US 547398 A US547398 A US 547398A US 54739866 A US54739866 A US 54739866A US 3392924 A US3392924 A US 3392924A
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United States
Prior art keywords
mill
section
grinding
chamber
tumbling media
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
US547398A
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English (en)
Inventor
Schmitz Hugo
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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Filing date
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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
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/06—Crushing or disintegrating by disc mills with coaxial discs with horizontal axis
    • 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
    • B02C17/08—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 containers performing a planetary movement
    • 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
    • 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
    • B02C17/07—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 in radial arrangement

Definitions

  • My invention relates to a multichamber mill of the tube type having a plurality of grinding chambers rigidly connected to one another and located around a common rotational axis, the peripheral walls of the mill having no openings.
  • a heretofore known embodiment of a multichamber mill has a mill cylinder which is divided radially into live chambers.
  • the walls of each individual chamber consist of substantially a fifth of the peripheral wall of the mill and two substantially fiat plates disposed with respect to one another so as to define an acute angle.
  • live grinding chambers asymmetrical in cross section are formed.
  • the displacement of the tumbling media is also non-uniform or unbalanced. Since the chamber walls are not rotationally symmetrical, it is impossible to have a uniform state of motion of the aggregate tumbling media.
  • the flat partition walls serve as raising shovels.
  • the quantity of tumbling media is shifted from the flat partition, which serves as the supporting surface, to the rotationally symmetrical casing of the mill.
  • the potential energy of the tumbling media proper is transformed in part to kinetic energy for the comminuting operation, while the remaining potential energy inures to or is applied to the turning moment of the mill.
  • This reclaimed energy for driving the mill opposes the reduced comminuting action 4during the upward motion of the grinding chamber so that the throughput performance or efficiency is reduced, and the yield of the specific output or eiciency is further nullified or cancelled in part.
  • the approximately triangular form of the grinding chambers in the aforementioned known mills cause the tumbling media to accumulate at three locations during rotation of the mill, i.e. in the corners or angles thereof, so that an especially short free slope or embankment is produced on which the comminuting action in essence is carried out.
  • the comminuting efciency of these known mills is relatively small.
  • each of the grinding chambers in accordance with my invention, with peripheral walls comprising a iirst section curved more than and a second section spaced from the center of gravity of the cross-sectional plane of the grinding chamber a distance less than the distance of the first-mentioned section from the center of gravity, and both sections are so disposed with respect to one another that the section closer to the gravity center is slipped under the charge or quantity of tumbling media when the grinding chambers are moved upwardly.
  • the convex sections (unsteady or changing planes) located relatively close to the center of gravity effect a rotation of the tumbling media approaching the crest of the convex sections.
  • This rotation leads to a simultaneous movement of all the particles in the tumbling media whereby a grinding effect is achieved not only at the sloping surface of the tumbling media but also in the entire quantity of tumbling media particles. In this manner, therefore, the grinding eifect is increased.
  • the tumbling media lie in the form of a slope or embankment in the vicinity of the grinding chamber section which is curved more than 180 so that a slope is formed there just as for single-chamber mills and the same comminution effect as in singlechamber mills is achieved.
  • the supply of tumbling media particles is thrown onto the other side of the respective grinding chamber due to the sudden rotation thereof in the vicinity of the apex of the convex section so that the center of gravity is displaced in the same direction and the turning moment opposing the drive moment is therewith at least partly balanced or canceled.
  • the tumbling energy of the supply of tumbling media acts in the direction of the rotary motion of the grinding chamber so that this energy, insofar as it does not produce comminuting action, is applied toward driving the mill.
  • FIG. l is a longitudinal section of a multiple chamber mill constructed in accordance with my invention
  • FIGS. 2 and 3 are cross-sectional views taken respectively along the lines II-II and III-III in FIG. 1;
  • FIG. 4 is a cross-sectional view similar to that of FIG.
  • the multichamber mill constructed in accordance w-ith my invention is provided with four grinding chambers 2a, 2b, 2c, 2d, for example, symmetrically disposed about the axis of rotation 1 of the mill.
  • Flanges 3a and 3b secure the grinding chamber to the partition walls 4a and 4b which are'in turn respectively connected by the cylindrical rings 5a and 5b with the side walls 6a and 6b of the mill.
  • Hollow throat-like trunnions or journals 7a and 7b are located on the end Walls 6a, 6b and are rotatably mounted in bearings 8a and 8b.
  • a gear rim 9 is anged onto the end wall 6a and, by means of meshing pinion 10, which is dri-ven by a non-illustrated drive means, rotates the mill about the axis 1.
  • the working material which is to be comminuted is conducted through the hopper 11 onto the interior of the hollow cone 12. From the latter, the working material slides into the space 13 defined by the end wall 6a, the partition 4a, and a conical ring 14 located intermediate to the end lwall 6a and the partition 4a. In the upwardly turning portion of the mill, the working material lirst slides against a guide plate 15 (FIG. 2), and is then conducted from the latter through the openings 16 into the grinding chambers. The comminuted material discharges from the grinding chambers through the openings 17 in i out resulting in any reduction in the throughput efficiency of the mill. For this purpose, a predominant portion of the chamber walls, in fact the section 21 (FIG.
  • a further effect is obtained which is based upon the fact that the grinding chamber walls adjacent the section 21, which is curved more than 180, has a second section 22 which is spaced from the center of gravity 23 of the cross-sectional plane of the grinding chamber a lesser distance than the first-mentioned section 21 is spaced therefrom.
  • the second section 22 (which forms a spatially varying plane) is curved o ⁇ r arches into the interior of the grinding chamber and is so located that, during the rotation of the mill in the direction of the arrow 24 with the upward motion of the grinding chambers, the section 22 gradually slides under the quantity of tumbling media particles and places the particles in the vicinity of the apex or crest of the convex section 22.
  • a further advantage of the mill'constr'ucted in accordance with the invention is that the tumbling media particles are partly supported by the convex or arched wall section 22 during the upward movement of the grinding chambers whereby it is possible to drive the mill with less rotary speed than is necessary for the heretofore-known mills. Since the driving power is proportional to the rotary speed, it follows therefore that the driving power of the mill constructed in accordance with the invention must be smaller proportionately as the rotary speed is smaller.
  • a screw conveyor can be provided by means of which either all or a portion of the ground material can be returned from one or more of the grinding chambers again to the mill :inlet end 11 so as to be re-ground.
  • Grinding mill comprising a plurality of rigidly connected grinding chambers adapted to contain a quantity of tumbling media and disposed about a common rotational axis, said chambers having respective closed peripheral walls each comprising a rst section curved more than and a second section located closer to the center of gravity -of the respective chamber, in a cross-sec- ⁇ tional plane thereof, than said trst section, said sections being disposed relative lto one another so that said second section rides under the quantity of tumbling media in the respective chamber when said chamber is being moved in an upward direction about said' comm-on rotational axrs.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
US547398A 1965-04-30 1966-05-02 Multichamber mill Expired - Lifetime US3392924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0036968 1965-04-30

Publications (1)

Publication Number Publication Date
US3392924A true US3392924A (en) 1968-07-16

Family

ID=27623755

Family Applications (1)

Application Number Title Priority Date Filing Date
US547398A Expired - Lifetime US3392924A (en) 1965-04-30 1966-05-02 Multichamber mill

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US (1) US3392924A (enrdf_load_html_response)
AT (1) AT282313B (enrdf_load_html_response)
BE (1) BE679712A (enrdf_load_html_response)
CH (1) CH432992A (enrdf_load_html_response)
DE (1) DE1227316B (enrdf_load_html_response)
DK (1) DK123630B (enrdf_load_html_response)
ES (1) ES326042A1 (enrdf_load_html_response)
FR (1) FR1483040A (enrdf_load_html_response)
GB (1) GB1145067A (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2381837C2 (ru) * 2008-03-11 2010-02-20 Государственное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" (БГТУ им. В.Г. Шухова) Помольно-смесительный агрегат
CN109012915A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 一种侧出料球磨机的行星磨筒
CN109012893A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 用于行星球磨机的转盘装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253748A (ja) * 1985-09-02 1987-03-09 株式会社徳寿工作所 水平旋回型粉砕機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1449592A (en) * 1920-11-10 1923-03-27 Walter C Eggert Grinding mill
US1621775A (en) * 1924-08-25 1927-03-22 Gibson William Wallace Mill
US1951823A (en) * 1930-04-07 1934-03-20 Walter P Eppers Grinding mill
US3097967A (en) * 1961-05-16 1963-07-16 Dca Food Ind Apparatus for coating comestibles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR390998A (fr) * 1908-06-05 1908-10-20 Charles Morel Tube broyeur-raffineur
AT96843B (de) * 1920-09-03 1924-05-10 Trent Process Corp Mehrfach-Trommelmühle.
GB250504A (en) * 1925-12-28 1926-04-15 Octave Bouzin Improvements in or relating to tubular mills for grinding or crushing
GB347413A (en) * 1930-03-18 1931-04-30 Edward Giles Stone Improvements in ball or tube mills
DE578437C (de) * 1932-03-02 1933-06-14 Fried Krupp Grusonwerk Akt Ges Mehrkammermuehle
GB435046A (en) * 1934-03-13 1935-09-13 Mikael Vogel Jorgensen Improvements in or relating to rotary tubular grinding or crushing mills

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1449592A (en) * 1920-11-10 1923-03-27 Walter C Eggert Grinding mill
US1621775A (en) * 1924-08-25 1927-03-22 Gibson William Wallace Mill
US1951823A (en) * 1930-04-07 1934-03-20 Walter P Eppers Grinding mill
US3097967A (en) * 1961-05-16 1963-07-16 Dca Food Ind Apparatus for coating comestibles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2381837C2 (ru) * 2008-03-11 2010-02-20 Государственное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" (БГТУ им. В.Г. Шухова) Помольно-смесительный агрегат
CN109012915A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 一种侧出料球磨机的行星磨筒
CN109012893A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 用于行星球磨机的转盘装置
CN109012893B (zh) * 2018-10-12 2023-10-13 河南先导机械力化学研究院有限公司 用于行星球磨机的转盘装置

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Publication number Publication date
DK123630B (da) 1972-07-17
DE1227316B (de) 1966-10-20
GB1145067A (en) 1969-03-12
BE679712A (enrdf_load_html_response) 1966-10-03
FR1483040A (fr) 1967-06-02
ES326042A1 (es) 1967-03-01
CH432992A (de) 1967-03-31
AT282313B (de) 1970-06-25

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