WO1994000240A1 - Procede de trituration dans des appareils pourvus d'elements broyeurs - Google Patents

Procede de trituration dans des appareils pourvus d'elements broyeurs Download PDF

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Publication number
WO1994000240A1
WO1994000240A1 PCT/EP1993/001482 EP9301482W WO9400240A1 WO 1994000240 A1 WO1994000240 A1 WO 1994000240A1 EP 9301482 W EP9301482 W EP 9301482W WO 9400240 A1 WO9400240 A1 WO 9400240A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
grinding
suspension
devices provided
nitrogen
Prior art date
Application number
PCT/EP1993/001482
Other languages
German (de)
English (en)
Inventor
Wolfgang Volker
Dieter Steidl
Original Assignee
Messer Griesheim Gmbh
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 Messer Griesheim Gmbh filed Critical Messer Griesheim Gmbh
Publication of WO1994000240A1 publication Critical patent/WO1994000240A1/fr

Links

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
    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • 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

  • the invention relates to a method for fine grinding in apparatus with grinding media, according to the preamble of claim 1.
  • Apparatuses with grinding media are, for example, ball mills, roller mills and in particular agitator ball mills.
  • the latter can be operated horizontally or vertically and are almost completely filled with balls.
  • the balls have very small diameters of 0.1 to 10 mm, depending on the grinding task. They can be made from ceramic, metallic or other material.
  • the balls are stirred by a central shaft and disks attached to it.
  • the invention has for its object to provide a method for fine grinding in apparatus with grinding media, which allows easy separation of the ground product and suspension liquid and facilitates the grinding of difficult to select solids such as plastics and waxes.
  • argon, oxygen, hydrogen and helium are suitable as cryogenic liquids, and also mixtures of liquid and solid carbon dioxide or of liquid nitrogen and solid carbon dioxide.
  • a plant for fine grinding of plastics is shown, in which, according to the invention, liquid nitrogen serves as the liquid for forming the suspension.
  • the system essentially consists of the ball mill 1, the mixing tank 2, the metering screw 3 and the filter 4.
  • the ball mill 1, the mixing tank 2 and the metering screw 3 are driven by the motors 5, 6 and 7.
  • the direction of flow of the material flows is indicated by arrows that are not identified in any more detail.
  • the solids to be milled go continuously from the dosing screw 3 as feed (educt) into the mixing container 2.
  • liquid nitrogen reaches the mixing container 2 through line 8 and the valve 9 provided with a level control Solids and the liquid nitrogen formed. So that this suspension does not separate due to the different weights, intensive stirring of the suspension by means of the motor 6 in the mixing container 2 is required.
  • the suspension passes through line 10 by means of the pump 11 into the ball mill 1.
  • the pump 11 is also provided with a level control.
  • the solids are finely ground in the ball mill 1 and then passed through the line 12 into the filter 4.
  • the resulting gaseous nitrogen is drawn off through line 13, the finely ground nitrogen-free product is removed through line 14 and the remaining liquid nitrogen passes through line 15 and pump 16 back into the mixing container 2.
  • Zirconium oxide balls 1-1, 5mm 0

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

On triture des corps solides dans des appareils pourvus d'élément broyeurs, notamment dans des triturateurs (1) à boulets et à agitateur mécanique, en formant une suspension constituée des corps solides à triturer et d'un liquide, et en amenant la suspension à l'appareil. Une fois la trituration achevée, le liquide est éliminé. Afin de faciliter l'élimination du liquide, on utilise un liquide qui s'évapore sans laisser de résidus, de préférence un milieu cryogène tel que l'azote liquide.
PCT/EP1993/001482 1992-06-19 1993-06-11 Procede de trituration dans des appareils pourvus d'elements broyeurs WO1994000240A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4220014.8 1992-06-19
DE4220014A DE4220014A1 (de) 1992-06-19 1992-06-19 Verfahren zur Feinmahlung in Apparaten mit Mahlkörpern

Publications (1)

Publication Number Publication Date
WO1994000240A1 true WO1994000240A1 (fr) 1994-01-06

Family

ID=6461330

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/001482 WO1994000240A1 (fr) 1992-06-19 1993-06-11 Procede de trituration dans des appareils pourvus d'elements broyeurs

Country Status (3)

Country Link
DE (1) DE4220014A1 (fr)
WO (1) WO1994000240A1 (fr)
ZA (1) ZA934327B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019073172A1 (fr) * 2017-10-12 2019-04-18 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif et procédé de broyage cryogénique avec média de broyage sous forme de gaz cryogénique solidifié

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503914C2 (de) * 1995-02-07 1998-07-30 Christian Dipl Ing Schoepe Verfahren zur Zerkleinerung von bitumenhaltigen Bahnen
DE19528958A1 (de) 1995-08-08 1997-02-13 Hoechst Ag Autogenes Mahlen von Siliziumnitrid
DE10144886B4 (de) * 2001-09-12 2004-02-26 Peter Endres Vorrichtung zum Zerkleinern von Mahlgut
DE102007051545A1 (de) * 2007-10-29 2009-04-30 Messer Group Gmbh Verfahren und Vorrichtung zur Feinstmahlung von Feststoffen
FR3137590A1 (fr) * 2022-07-11 2024-01-12 Commissariat A L'energie Atomique Et Aux Energies Alternatives Procédé de dosage de poudres

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1094977A (fr) * 1953-11-28 1955-05-25 Installation de broyage à très basse température en présence de gaz liquéfiés
EP0367403A2 (fr) * 1988-10-03 1990-05-09 The Carborundum Company Procédé pour le broyage d'un matériel céramique, sensible à l'oxygène et poudre obtenue par le procédé
US5007589A (en) * 1987-03-26 1991-04-16 Metprotech Limited Process for simultaneously leaching and fine milling a subdivided source material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3345974C2 (de) * 1983-12-20 1994-03-10 Schmidt Ulrich Dr Verfahren zum Mahlen von kristallinen Feststoffen
AT381651B (de) * 1985-02-28 1986-11-10 Voest Alpine Ag Verfahren zum mahlen von mineralien mit einer mehrkammerrohrmuehle sowie anlage zur durchfuehrung des verfahrens
DE3833830A1 (de) * 1988-10-05 1990-04-12 Messer Griesheim Gmbh Verfahren und vorrichtung zum kaltmahlen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1094977A (fr) * 1953-11-28 1955-05-25 Installation de broyage à très basse température en présence de gaz liquéfiés
US5007589A (en) * 1987-03-26 1991-04-16 Metprotech Limited Process for simultaneously leaching and fine milling a subdivided source material
EP0367403A2 (fr) * 1988-10-03 1990-05-09 The Carborundum Company Procédé pour le broyage d'un matériel céramique, sensible à l'oxygène et poudre obtenue par le procédé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019073172A1 (fr) * 2017-10-12 2019-04-18 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif et procédé de broyage cryogénique avec média de broyage sous forme de gaz cryogénique solidifié
FR3072308A1 (fr) * 2017-10-12 2019-04-19 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif et procede de broyage cryogenique avec media de broyage sous forme de gaz cryogenique solidifie
JP2021508285A (ja) * 2017-10-12 2021-03-04 コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ 固化した低温ガスの形態の粉砕媒体を用いた低温粉砕のための装置及び方法

Also Published As

Publication number Publication date
DE4220014A1 (de) 1993-12-23
ZA934327B (en) 1994-08-10

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