US3739991A - Vibrating mill - Google Patents

Vibrating mill Download PDF

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Publication number
US3739991A
US3739991A US00184795A US3739991DA US3739991A US 3739991 A US3739991 A US 3739991A US 00184795 A US00184795 A US 00184795A US 3739991D A US3739991D A US 3739991DA US 3739991 A US3739991 A US 3739991A
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US
United States
Prior art keywords
grinding
vibrating mill
gas
ground
vibrating
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
US00184795A
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English (en)
Inventor
P Wehren
H Haas
G Demel
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Publication of US3739991A publication Critical patent/US3739991A/en
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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
    • B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/37—Cryogenic cooling

Definitions

  • VIBRATING MILL Inventors: Peter Wehren; Helmut Haas;
  • ABSTRACT In a vibrating mill installation having a horizontally extending grinding chamber between a closed material feed device and a closed material discharge device the grinding chamber is provided between its ends with a plurality of serially arranged openings from which portions of gas are withdrawn by pipelines leading to the suction side of a blower or pump, while a cooling agent such as liquid nitrogen-is introduced into the grinding chamber and cools the material being ground therein.
  • the pressure side of the blower or pump is connected with the material feed device so that the still cool gas withdrawn from the grinding chamber is used to subject the material in the feed device to a preliminary treatment before the material to be ground enters the grinding chamber of the vibrating mill.
  • the invention relates to a grinding mechanism employing a vibrating mill having a closed material feed means and a closed material discharge means.
  • This structure avoids the disadvantages which are present when the vibrating mill is cooled with water.
  • the amount of gas is withdrawn from the grinding space or grinding chamber at a predetermined pressure.
  • This permits one to determine in a simple manner the maximum permissible amount of gas to be withdrawn at which no reduction of the grinding capacity takes place, while on the other handfor instance when measuring first the grinding capacity and then determining the adjustment of the amounts of gas to be withdrawnsuch a method is very complicated and owing to the long delay period caused by the determination of the grinding capacity is also inaccurate.
  • the determination of the amount of gas to be withdrawn preferably takes place in such a manner that the adjustment of the predetermined pressure takes place by adjustable throttling means arranged in at least one of the pipelines connected with the gas withdrawal openings.
  • the withdrawal of the gases from the grinding chamber takes place in such a manner that at the gas discharge openings a reduced pressure is produced.
  • the reduced pressure at the gas withdrawal openings is suitably produced by the suction side of a blower or a pump.
  • the invention can also be applied with advantage to grinding operations in which the material to be ground is made brittle with the assistance of a refrigerant-for instance liquid nitrogen- -and therefore it is now possible to improve the grinding of different types of materials in vibrating mil1s-for instance plastics, which heretofore could not be ground at all.
  • the invention preferably employs a vibrating mill comprising two parallel grinding tubes.
  • the material feed opening is connected to a material feed device which subjects the material to be ground to a preliminary treatment, such as a cooling device.
  • the present invention is distinguished in this in that each grinding tube is provided with at least one withdrawal opening for the gases and these openings are connected by pipelines with a reduced pressure source. In this manner it is very simple to catch a pres sure rise in each grinding tube even when cooling agents are additionally introduced.
  • the installation is provided with an adjustable throttle device in each pipeline which extends from a gas withdrawal opening to the reduced pressure source.
  • an adjustable throttle device in each pipeline which extends from a gas withdrawal opening to the reduced pressure source.
  • the pressure side of the blower or the pump is connected by a pipeline with the feed device of the vibrating mill which is used for a preliminary treatment of the material to be ground.
  • This feed device in this particular embodiment of the invention comprises a cooling device.
  • the arrangement of the cooling device has the advantage that the gases which are withdrawn from the vibrating mill, in the event of the introduction of cooling agents into the grinding chamber, may still be exploited for the cooling or precooling of the material to be ground before they are discharged into the atmosphere.
  • An advantage of this arrangement resides in the fact that the gases which are withdrawn from the grinding chamber during the movement through the material to be ground in the feed device will be freed of any dust because the latter will be deposited on the material to be ground while in the feed device.
  • Still another object of the invention is the arrangement of a material lock which is impermeable to gas between the feed device and the material receiving opening of the vibrating mill.
  • a material lock which is impermeable to gas between the feed device and the material receiving opening of the vibrating mill.
  • the material lock is constructed in the form of a so-called bucket wheel lock which assures an almost complete sealing of the grinding chamber with respect to the feed device with reference to the passage of the gases from the grinding chamber into the feeding device.
  • Another advantage resides in the fact that the rotative speed of the bucket wheel lock in addition permits a simple manner of dosing of the material to be ground into the grinding chamber.
  • a vibrating mill which includes two horizontally disposed grinding tubes 2 and 3 which are connected with each other and are vibratorily supported and provided with an out-of-balance drive, and has its material feed opening 4 connected by means of a flexible intermediate member 5 with a material feed device 6.
  • This material feed device 6 is used for a preliminary treatment of the material to be ground and in the present instance comprises a cooling device.
  • the cooling device is connected by a pipeline 7 with a substantially horizontally disposed conveyor device 8-for instance comprising a vibrating conveyor tubeand the latter receives the material to be ground from a supply bin 9.
  • the two grinding tubes 2 and 3 which are both filled with grinding bodies, are connected with each other by a pipeline 10 in such a manner that the material to be ground passes first through one of the tubes 2 and then through the other one of the tubes in series.
  • the material discharge opening 11 of the grinding tube 3 is connected by a flexible intermediate tubular member 12 with a collecting container 13 into which the ground material is discharged.
  • this tubes In place of the illustrated series arrangement of the grinding tubes 2 and 3, it is also possible to arrange these tubes parallel with each other depending upon the type of material to be ground in the vibrating mill.
  • a bucket wheel lock 15 and 16 respectively, for adjusting the material feed and the material discharge, respectively.
  • a cooling agent is introduced whichdepending upon the degree of cooling required-comprises a gas or a liquid or a vaporous cooling agent, for instance nitrogen.
  • the cooling device is preferably constructed so that the liquid or vaporized nitrogen cannot directly reach the vibrating mill.
  • additional nitrogen is introduced in closed quantities directly into the grinding chamber either in a liquid or in a vapor form. This is accomplished preferably in the range of the point at which the material to be ground enters the grinding tube, namely at the range of the material feed opening 4 in the grinding tube 2 and in the range of the connecting pipe 10, where the latter is connected with the grinding tube 3.
  • the grinding tube 2 and also the grinding tube 3, with reference to the direction of movement of the material as indicated by the arrows 30 and 30, are provided in the center of their grinding chambers and at their ends with gas withdrawal openings 17, 18 and 19, 20, respectively, and these openings are each connected by suitable flexible intermediate tubular members with pipelines 21, 22, 23 and 24.
  • suitable flexible intermediate tubular members with pipelines 21, 22, 23 and 24.
  • the pipelines 21, 22, 23 and 24 areconnectecl with a manifold 25 and the latter is connected with the suction side of a blower 26.
  • a pressure gauge 27 In each of the pipelines 21, 22, 23 and 24 is arranged a pressure gauge 27.
  • an adjustable throttling device 28 is arranged in each of the pipelines 21, 22, 23 and 24.
  • the pressure side of the blower 26 is connected by a pipeline having a throttle 28 and gauge 27, 29 the cooling device 6. If the material to be ground is, for instance, cooled with liquid nitrogen, then for the purpose of saving nitrogen the gases withdrawn by the pipeline 29 are introduced for a preliminary cooling of the material to be ground into the material feed devices which are connected with the cooling device 6.
  • the material to be ground is taken by the vibrating tube conveyor 8 from the supply bin 9 and is conveyed into the pipeline 7 and by the latter into the cooling device 6.
  • the material to be ground comes into direct contact with liquid nitrogen and is sufficiently cooled so that the material becomes brittle and a very good grindability is obtained, or the grindability is improved therewith.
  • the bucket wheel lock 15 delivers the material to be ground to the feed opening 4 of the grinding tube 2 of the vibrating mill in dosed quantities.
  • the material to be ground moves under the influence of the continuously newly supplied amounts of material and under the vibrating movements of the grinding tubes first in the direction of the arrow 30 through their grinding tube 2 and is crushed or ground therein by the grinding bodies; then the material ground is transferred by the connecting pipe 10 into the grinding tube 3 in which the grinding operation is completed and the material is ground still more.
  • the bucket wheel lock 16 then transfers the completely ground material from the vibrating mill into the collecting container 13.
  • the throttles in these pipelines are now so adjusted that the pipelines 22 and 24 will each withdraw a somewhat larger partial stream of nitrogen than is done by the pipelines 21 and 23, respectively. In this manner the assurance is gained that the gas flow in the grinding tubes will always be in the same direction as the material to be ground as it moves through the grinding tubes.
  • the gaseous, but still cold nitrogen which is withdrawn from the vibrating mill is introduced by the pipeline 29 into the upper range of the cooling device 6 and is used for a preliminary cooling of the material to be ground,
  • This nitrogen gas leaves the installation in an opposite direction than the direction in which the terminal to be ground is moved, namely upwardly through the pipe 7 and through the vibrating conveyor 8 and finally through the supply bin 9 as indicated by the arrow above the bin 9.
  • the fine particles of the material which are withdrawn from the grinding space in this manner will be deposited on the material to be ground so that the nitrogen gas which escapes into the atmosphere is free of dust.
  • the collecting container 13 may be connected by a pipeline 33 with the manifold 25 of the blower 26 so that any nitrogen which reaches the collecting container 13 via the bucket wheel lock 16 may be removed.
  • the invention is not limited to a vibrating mill such as has been described in the foregoing, but may also be used in the same manner with other constructions of a vibrating mill and may even be used in connection with intermittently operating vibrating mills.
  • a vibrating mill installation having a closed material feed means and a closed material discharge means and therebetween means for grinding the material introduced into said mill, said means for grinding said material comprising two parallel. disposed horizontal grinding tubes each of which is provided with at least one opening used for the withdrawal of gas from the interior of said grinding tubes, means forming a source of reduced pressure, and pipelines connecting said openings with said source of reduced pressure.
  • a vibrating mill installation according to claim 1 including an adjustable throttling device in each pipeline connecting a gas withdrawal opening in said grinding tubes with said source of reduced pressure.
  • a vibrating mill installation according to claim 1 including a pipeline connecting the pressure side of said means forming a source of reduced pressure with said closed material feed means,
  • a vibrating mill installation including a pipeline connecting the pressure side of said means forming a source of reduced pressure with said closed material feed means, and an adjustable throttling device in said pipeline leading to said closed material feed means.
  • a vibrating mill installation according to claim 1 including a material lock which is impermeable to gas arranged between the material feed device and the inlet of the first one of said two grinding tubes.
  • a vibrating mill installation including a material lock which is impermeable to gas arranged between the material feed device and the inlet of the first one of said two grinding tubes, said material lock comprising a bucket wheel lock.
  • a vibrating mill including a collecting means connected with said material discharge means and a material lock which is impermeable to gas arranged in the connection between said material discharge means and said collecting means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
US00184795A 1970-10-05 1971-09-29 Vibrating mill Expired - Lifetime US3739991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702048810 DE2048810A1 (de) 1970-10-05 1970-10-05 Mahlverfahren fur Schwingmuhlen mit abgeschlossenen Gutein und Gutaustrags vorrichtungen und Anlage zur Durchfuhrung des Verfahrens

Publications (1)

Publication Number Publication Date
US3739991A true US3739991A (en) 1973-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00184795A Expired - Lifetime US3739991A (en) 1970-10-05 1971-09-29 Vibrating mill

Country Status (11)

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US (1) US3739991A (xx)
AR (1) AR198163A1 (xx)
AU (1) AU3413071A (xx)
CA (1) CA945127A (xx)
CH (1) CH535605A (xx)
DE (1) DE2048810A1 (xx)
ES (1) ES395655A1 (xx)
FR (1) FR2112997A5 (xx)
GB (1) GB1348727A (xx)
SE (1) SE369679B (xx)
ZA (1) ZA716650B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039414A (en) * 1989-08-01 1991-08-13 Mueller Marc B Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges
US5513809A (en) * 1995-07-03 1996-05-07 Tdf, Inc. Cryogenic vibratory mill apparatus
US6399676B1 (en) 2000-11-28 2002-06-04 Conoco, Inc. Drag-reducing polymer suspensions
US6576732B1 (en) 2000-11-28 2003-06-10 Conocophillips Co. Drag-reducing polymers and drag-reducing polymer suspensions and solutions
US6765053B2 (en) 2000-11-28 2004-07-20 Conocophillips Company Drag-reducing polymer suspensions
CN103480476A (zh) * 2013-09-18 2014-01-01 江苏泰格油墨有限公司 一种砂磨机低温冷却装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827912A1 (de) * 1977-10-13 1979-04-19 Simmering Graz Pauker Ag Verfahren und vorrichtung zur herstellung aktivierter gemische mineralischer komponenten
DE3014070A1 (de) * 1980-04-11 1981-10-15 Klöckner-Humboldt-Deutz AG, 5000 Köln Vorrichtung zur behandlung von stoffen, insbesondere feststoffen
SE469417B (sv) * 1991-12-20 1993-07-05 Sala International Ab Saett och anordning foer finmalning av foer filleraendamaal anvaendbara mineral i torrt tillstaand
CN102794452A (zh) * 2011-05-24 2012-11-28 合肥旭阳铝颜料有限公司 一种铝银浆的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2031710A (en) * 1931-08-29 1936-02-25 Firm G Polysius Ag Pulverizing apparatus
FR1283676A (fr) * 1960-03-14 1962-02-02 Salzgitter Ind Ges M B H Moulin oscillant et son procédé de mouture
US3310245A (en) * 1963-07-10 1967-03-21 Kloeckner Humboldt Deutz Ag Grinding mill of the swinging type with a plurality of grinder drums
US3510074A (en) * 1967-07-27 1970-05-05 Electronic Assistance Corp Vibrating ball mill
US3658259A (en) * 1969-12-15 1972-04-25 Inventa Ag Method for granule pulverization

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2031710A (en) * 1931-08-29 1936-02-25 Firm G Polysius Ag Pulverizing apparatus
FR1283676A (fr) * 1960-03-14 1962-02-02 Salzgitter Ind Ges M B H Moulin oscillant et son procédé de mouture
US3310245A (en) * 1963-07-10 1967-03-21 Kloeckner Humboldt Deutz Ag Grinding mill of the swinging type with a plurality of grinder drums
US3510074A (en) * 1967-07-27 1970-05-05 Electronic Assistance Corp Vibrating ball mill
US3658259A (en) * 1969-12-15 1972-04-25 Inventa Ag Method for granule pulverization

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039414A (en) * 1989-08-01 1991-08-13 Mueller Marc B Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges
US5513809A (en) * 1995-07-03 1996-05-07 Tdf, Inc. Cryogenic vibratory mill apparatus
US6399676B1 (en) 2000-11-28 2002-06-04 Conoco, Inc. Drag-reducing polymer suspensions
US6576732B1 (en) 2000-11-28 2003-06-10 Conocophillips Co. Drag-reducing polymers and drag-reducing polymer suspensions and solutions
US6765053B2 (en) 2000-11-28 2004-07-20 Conocophillips Company Drag-reducing polymer suspensions
CN103480476A (zh) * 2013-09-18 2014-01-01 江苏泰格油墨有限公司 一种砂磨机低温冷却装置
CN103480476B (zh) * 2013-09-18 2015-08-26 江苏泰格油墨有限公司 一种砂磨机低温冷却装置

Also Published As

Publication number Publication date
AR198163A1 (es) 1974-06-07
ZA716650B (en) 1972-06-28
SE369679B (xx) 1974-09-16
DE2048810A1 (de) 1972-04-06
AU3413071A (en) 1973-04-05
CH535605A (de) 1973-04-15
CA945127A (en) 1974-04-09
GB1348727A (en) 1974-03-20
ES395655A1 (es) 1974-10-01
FR2112997A5 (xx) 1972-06-23

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