US3785575A - Vibrating mill with introduction of refrigerants into the solid material being ground in the grinding chamber - Google Patents

Vibrating mill with introduction of refrigerants into the solid material being ground in the grinding chamber Download PDF

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Publication number
US3785575A
US3785575A US00199933A US3785575DA US3785575A US 3785575 A US3785575 A US 3785575A US 00199933 A US00199933 A US 00199933A US 3785575D A US3785575D A US 3785575DA US 3785575 A US3785575 A US 3785575A
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US
United States
Prior art keywords
chamber
grinding
refrigerant
inlet
outlet
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
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US00199933A
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English (en)
Inventor
J Langmaack
H Haas
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
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Kloeckner Humboldt Deutz AG
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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
    • B02C17/14—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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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

  • ABSTRACT A vibrating mill for grinding solid materials is provided with a grinding chamber with at least one or a plurality of spaced feed pipes for refrigerants which terminate within the body of the solid material being ground within the grinding chamber and the amount of the refrigerants introduced is controlled by temperature probe or probes which control valves in said feed pipes.
  • Drawing Figure 1 VIBRATING MILL wITII INTRODUCTION OF REFRIGERANTS INTo THE SOLID MATERIAL BEING GROUND IN THE GRINDING CHAMBER
  • the invention relates to a vibrating mill for the comminution of solid materials with addition of refrigerants into the grinding chamber.
  • the German Laid Out Specification No. 1,004,460 discloses a device for cold grinding of solid, viscous materials, in which the materials to be groundfor example thermoplastic synthetic materials-before the introduction into the grinding device, are conveyed through a cooling device filled with liquid nitrogen, in which the synthetic materials to be comminuted are embrittled.
  • a cooling device filled with liquid nitrogen, in which the synthetic materials to be comminuted are embrittled.
  • the vapors produced by the liquid bath of the cooling device are conveyed through the grinding device.
  • Another object of the invention is that thefeed openings for the refrigerant are arranged on the side of the grinding chamber, on which under the influence of the vibrating movement, a movement of the material being ground in a downward direction takes place.
  • the movement of the material being ground in the grinding chamber is made use of for the transportation and for the distribution of the refrigerant introduced into the lower areas of the material being ground.
  • a further advantage of this arrangement is that the formation of the feed apertures for the refrigerant, which must be protected with respect to a 2 direct contact with the grinding bodies, is relatively simple.
  • Still another object of the invention is that one or several valves of the feed openings are controllably connected in each case with a temperature probe whichin axial direction of the grinding chamber and viewed from the material feed point-is arranged spaced behind at least one feed'opening and is in connection with the interior of the grinding chamber.
  • At least one temperature probe is so arranged on the grinding container so that it is in contact with the grinding material. Thereby when the temperature probe is in contact with the grinding material it avoids merely taking the temperature of the gas flow above the surface of the material in the free space of the grinding container.
  • the material temperature is detected more accurately, it is to be expected that temperature changes will be recognized more rapidly, and thus upon the connection of the valves with the temperature probes to automatic control circuits, the idle time periods are few. The consumption of refrigerants therefore may be reduced.
  • The'number of the feed apertures for the refrigerant distributed over the length of the grinding container depends essentially on the length of the grinding container, and the passage time of the material to be ground. With a very fine comminution, the passage time for the material through the grinding container may amount to one hour and more, so that refrigerant must be introduced at several locations of the grinding container. Probes and the problem of how many feed valves are to be connected with one temperature probe in case of an automatic regulation depends likewise on the characteristics of the individual case.
  • the injection of the quantities of refrigerant through all the feed openings lying in front-viewed in direction of passage of the material- may be regulated through only one temperature probe which is advantageously arranged in the area of the material discharge opening of the grinding container.
  • a vibrating mill in which the grinding container is provided directly in front of the material discharge aperture with a separating wall, which holds back the grinding bodies but permits the passage of the comminuted material, the temperature probe projects into the area behind the separating wall into the comminuted material. This makes it possible to introduce the temperature probe deeply into the flow of material being ground, without special protective measures having to be provided with respect of the grinding bodies.
  • the drawing diagrammatically illustrates an example of a grinding arrangement of the invention and which explains the grinding of solid substances at low temperatures in a vibrating mill, in accordance with the invention.
  • the two grinding tubes 1 and 2 are connected together at the end of the grinding tube 1 facing away from the material inlet opening 4 by a vertical connecting pipe 5.
  • the grinding tube 2 has at its end facing away from the inlet of the connecting pipe 5 a material discharge 6, which discharges into a collecting container 7 for the material which has been ground.
  • the embrittled material to be ground passes from the cooling device through the material inlet opening 4 into the grinding tube 1. Under the influence of the vibrating movements and of the constantly flowing material, the individual particles of material travel in the direction of the arrow 8 through the grinding tube filled with grinding bodies. Through a separating wall 9 provided with fine holes, which insure the passage of the comminuted material, but hold back the grinding bodies in the grinding tube 1, the comminuted material passes through the connecting pipe 5 into the grinding tube 2 which likewise is filled with grinding bodies. Also here the material travels under the influence of the vibrating movements and the material flowing thereafter from the inlet aperture of the connecting pipe 5 in the direction of the arrow 9a to the discharge 6 of the grinding tube 2 into the collection container 7.
  • a feed pipe 11 extends into the material to be ground in the grinding tube 1.
  • This feed pipe which'for reasons of the better distribution of refrigerant and for the lowering of the inlet speed may advantageously have several parallel or divergingly constructed nozzle openings, is suitably arranged to extend through the end face of the grinding tube.
  • a control valve 12 is arranged in the refrigerant inlet of the feed pipe 11.
  • This control valve in the event of the equipment of the grinding installation is provided with an automatic regulation of the feed of the refrigerant into the grinding chamber, may be provided with a motor-driven, pneumatic or electromagnetically actuated adjusting device.
  • a temperature probe 13 which suitably is arranged on the grinding container so that it is in direct contact with the material to be ground, the quantity of refrigerant to be injected by the feed pipe 11 is regulated in dependence on the material temperature.
  • the value measured by the temperature pipe for example a thermo-elementis supplied as theoretical value of a regulating device 14 which adjusts the adjusting device of the control valve 12 corresponding to the predetermined theoretical values.
  • the feed pipe 15 is arranged on the side of the grinding container on which under effect of the vibrating movement, the grinding material carries out a movement directed downwardly according to the arrow 16.
  • the feed pipe which may have several parallel or divergently directed nozzle openings, must be covered on the inner side of the grinding container for protection against disturbances through the grinding bodies. Also this feed pipe is connected with a control valve 17 to the refrigerant supplier.
  • a temperature probe 18 is advantageously arranged in the area of the discharge opening of the grinding container 1, and in the rear of the perforated disc 9.
  • this space formed between the perforated disc 9 and the end wall 19 of the grinding container 1 there may for example be disposed through an overflow device 20 the inlet opening for the connecting pipe 5 in such a manner that the material passing through the perforated disc 9 first is dammed up or retained in this chamber, so that the temperature probe 18 may be inserted deeply into the ground material and thus quite an accurate value of the grinding material temperature may be determined.
  • the temperature probe 18 is also provided with a regulating device 21 which operates the control valve 17. Since the arrangement of the temperature probe 18 at the discharge end of the grinding container 1 insures quite an accurate determination of the material temperatureacco,rding to the characteristics of the substance to be comminuted, the quality of the insulation, the length of. the grinding container, etc.it may be sufficient if the feed of refrigerant is regulated solely by this temperature probe 18, so that the other temperature probe 13 with the corresponding regulating device 14 may not be necessary. In such a case the regulating device 21 and also the control valve 12 are connected with the feed pipe 11, as shown by the dash-dotted line 22.
  • the regulating device 21 may to advantage be so constructed that through the feed pipe 11 continuously or at uniform periods of time through the feed pipe 11 and if need be through the feed opening 15, a quantity of refrigerant regarded as constant in timing is supplied. Upon exceeding the minimum temperature of the material in the discharge housing, measured by the temperature probe 18, then up to a predetermined quantity of refrigerant limited by the regulator, a larger quantity of refrigerant may be introduced through the feed pipe 15.
  • the inference may be that already at the injecting point 15, the minimum material temperature is exceeded, so that additionally the quantities of perature probe 13 shown in the drawing as auxiliary regulating size of the regulating device 21.
  • the inoperative periods" and an oscillation of the regulating circuit may be appreciably diminished.
  • the construction of the vibrating mill in accordance with the invention is not limited to the arrangement of only two supply openings for refrigerant and correspondingly one or two temperature probes, but according to the requirements of the particular case, there may be arranged in longitudinal direction of the grinding container also several feed openings for refrigerant consecutively. whose regulating valves individually or combined into groups are connected with the regulating device.
  • the grinding container 2 is provided in a manner similar to the grinding container 1 with feed pipes or openings for refrigerant and corresponding temperatures probes and regulating devices.
  • a vibrating mill for the grinding of solid substances comprising in combination:
  • a vibratory drive means connected to the chamber for grinding material therein;
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 3:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 3:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a vibrating mill for the grinding of solid substances constructed in accordance with claim 1:
  • a second refrigerant inlet leading into the chamber having an opening positioned near a lower portion of the chamber for discharging refrigerant below the material being processed; a screen across the discharge end of the chamber; first and second temperature sensitive probes for controlling inlet valves for respectively the first and second refrigerant inlets; a second chamber having an inlet connected to the outlet for the first chamber; an outlet for said second chamber at the end opposite the inlet end; a screen across the outlet end of said second chamber; a screen across the outlet end of said first chamber; first and second refrigerant inlets leading into said second chamber; and first and second temperature sensitive probes connected to valves for the refrigerant inlets for the second chamber and being positioned within the second chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Crushing And Pulverization Processes (AREA)
US00199933A 1970-11-21 1971-11-18 Vibrating mill with introduction of refrigerants into the solid material being ground in the grinding chamber Expired - Lifetime US3785575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702057428 DE2057428A1 (de) 1970-11-21 1970-11-21 Schwingmuehle fuer die Zerkleinerung fester Stoffe unter Zugabe von Kaeltemitteln in den Mahlraum

Publications (1)

Publication Number Publication Date
US3785575A true US3785575A (en) 1974-01-15

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Family Applications (1)

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US00199933A Expired - Lifetime US3785575A (en) 1970-11-21 1971-11-18 Vibrating mill with introduction of refrigerants into the solid material being ground in the grinding chamber

Country Status (8)

Country Link
US (1) US3785575A (enrdf_load_stackoverflow)
AU (1) AU461997B2 (enrdf_load_stackoverflow)
CA (1) CA962248A (enrdf_load_stackoverflow)
DE (1) DE2057428A1 (enrdf_load_stackoverflow)
FR (1) FR2115868A5 (enrdf_load_stackoverflow)
GB (1) GB1375870A (enrdf_load_stackoverflow)
SU (1) SU410582A3 (enrdf_load_stackoverflow)
ZA (1) ZA717822B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085898A (en) * 1975-08-09 1978-04-25 Klockner-Humboldt-Deutz Ag Apparatus for comminution of welding electrode jackets
US4222527A (en) * 1979-02-22 1980-09-16 Union Carbide Corporation Cryopulverizing packed bed control system
US4409034A (en) * 1981-11-24 1983-10-11 Mobile Companies, Inc. Cryogenic cleaning process
US4491484A (en) * 1981-11-24 1985-01-01 Mobile Companies, Inc. Cryogenic cleaning process
US4533087A (en) * 1983-08-08 1985-08-06 Combustion Engineering, Inc. Apparatus with heat exchange means and transfer pipe for treating solid, granular and aggregate materials
US5513809A (en) * 1995-07-03 1996-05-07 Tdf, Inc. Cryogenic vibratory mill apparatus
EP2055386A1 (de) * 2007-10-29 2009-05-06 Messer Group GmbH Verfahren und Vorrichtung zur Feinstmahlung von Feststoffen
US20100137567A1 (en) * 2007-04-04 2010-06-03 Qiagen Gmbh Pulverizer and corresponding method for preparing a biological sample for processing
CN111346697A (zh) * 2020-04-07 2020-06-30 中山诺顿科研技术服务有限公司 一种研磨过滤机构及药材研磨设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014070A1 (de) * 1980-04-11 1981-10-15 Klöckner-Humboldt-Deutz AG, 5000 Köln Vorrichtung zur behandlung von stoffen, insbesondere feststoffen
RU2229340C2 (ru) * 2002-06-27 2004-05-27 Дубкова Наиля Зуфаровна Вибрационная шаровая мельница
RU2350393C1 (ru) * 2007-11-26 2009-03-27 Государственное образовательное учреждение высшего профессионального образования Воронежская государственная технологическая академия Устройство криоизмельчения

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561043A (en) * 1946-07-12 1951-07-17 Agrashell Inc Apparatus for grinding combustible materials
US3272443A (en) * 1962-02-22 1966-09-13 Reiners Ewald Vibratory mill
US3295791A (en) * 1964-12-11 1967-01-03 Dolphus H Black Storage container mounting for space vehicles
US3633830A (en) * 1968-05-10 1972-01-11 Linde Ag Process and apparatus for the comminution of soft material
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
US2561043A (en) * 1946-07-12 1951-07-17 Agrashell Inc Apparatus for grinding combustible materials
US3272443A (en) * 1962-02-22 1966-09-13 Reiners Ewald Vibratory mill
US3295791A (en) * 1964-12-11 1967-01-03 Dolphus H Black Storage container mounting for space vehicles
US3633830A (en) * 1968-05-10 1972-01-11 Linde Ag Process and apparatus for the comminution of soft material
US3658259A (en) * 1969-12-15 1972-04-25 Inventa Ag Method for granule pulverization

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085898A (en) * 1975-08-09 1978-04-25 Klockner-Humboldt-Deutz Ag Apparatus for comminution of welding electrode jackets
US4222527A (en) * 1979-02-22 1980-09-16 Union Carbide Corporation Cryopulverizing packed bed control system
US4409034A (en) * 1981-11-24 1983-10-11 Mobile Companies, Inc. Cryogenic cleaning process
US4491484A (en) * 1981-11-24 1985-01-01 Mobile Companies, Inc. Cryogenic cleaning process
US4533087A (en) * 1983-08-08 1985-08-06 Combustion Engineering, Inc. Apparatus with heat exchange means and transfer pipe for treating solid, granular and aggregate materials
US5513809A (en) * 1995-07-03 1996-05-07 Tdf, Inc. Cryogenic vibratory mill apparatus
US20100137567A1 (en) * 2007-04-04 2010-06-03 Qiagen Gmbh Pulverizer and corresponding method for preparing a biological sample for processing
US8348183B2 (en) * 2007-04-04 2013-01-08 Qiagen Gmbh Pulverizer and corresponding method for preparing a biological sample for processing
EP2055386A1 (de) * 2007-10-29 2009-05-06 Messer Group GmbH Verfahren und Vorrichtung zur Feinstmahlung von Feststoffen
CN111346697A (zh) * 2020-04-07 2020-06-30 中山诺顿科研技术服务有限公司 一种研磨过滤机构及药材研磨设备

Also Published As

Publication number Publication date
AU461997B2 (en) 1975-05-28
SU410582A3 (enrdf_load_stackoverflow) 1974-01-05
ZA717822B (en) 1972-08-30
GB1375870A (enrdf_load_stackoverflow) 1974-11-27
FR2115868A5 (enrdf_load_stackoverflow) 1972-07-07
DE2057428A1 (de) 1972-06-08
AU3597271A (en) 1973-05-31
CA962248A (en) 1975-02-04

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