EP0796660A1 - Procédé et dispositif pour la fabrication de poudres ultrafines - Google Patents

Procédé et dispositif pour la fabrication de poudres ultrafines Download PDF

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Publication number
EP0796660A1
EP0796660A1 EP97104100A EP97104100A EP0796660A1 EP 0796660 A1 EP0796660 A1 EP 0796660A1 EP 97104100 A EP97104100 A EP 97104100A EP 97104100 A EP97104100 A EP 97104100A EP 0796660 A1 EP0796660 A1 EP 0796660A1
Authority
EP
European Patent Office
Prior art keywords
dryer
powder
drying chamber
surface treatment
mill
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.)
Granted
Application number
EP97104100A
Other languages
German (de)
English (en)
Other versions
EP0796660B1 (fr
Inventor
Michael Andreae-Jäckering
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.)
Altenburger Maschinen KG Jaeckering and Co
Original Assignee
Altenburger Maschinen KG Jaeckering and Co
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 Altenburger Maschinen KG Jaeckering and Co filed Critical Altenburger Maschinen KG Jaeckering and Co
Publication of EP0796660A1 publication Critical patent/EP0796660A1/fr
Application granted granted Critical
Publication of EP0796660B1 publication Critical patent/EP0796660B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material

Definitions

  • the invention relates to a process for the production of extremely fine powders which are wet-ground in a mechanical mill and then dried.
  • the invention also relates to a plant for carrying out this method.
  • Powders of all kinds have to be finer and finer for technical reasons.
  • the finenesses achievable today are 1 ⁇ .
  • the powders affected here are wet-ground as components of a suspension in mechanical mills (ball mills, bead mills, annular gap mills, etc.). After grinding in the wet phase, the powders must be dried. For this purpose it is known to use spray dryers.
  • the present invention is based on the object of proposing a drying phase in a method of the type mentioned at the outset, which allows agglomerate-free drying of the allows extremely fine powder.
  • this object is achieved in that the drying of the ground powder, which is present in a suspension, is carried out in an air vortex mill.
  • the comminution principle is based on the fact that the regrind particles within a large number of air vortices, which are generated by rotating plates, are accelerated to a high speed and predominantly mutual impacts To run. Because the material is constantly in turbulent air currents, moisture adhering to the particles can be very quickly absorbed by the air and thus rapid and intensive drying can be achieved. In addition, the crushing effect is retained so that re-agglomerates do not arise.
  • agglomerate-free drying of the powders can be achieved in a single process step in the process according to the invention. It is expedient to supply hot air as carrier gas to the air vortex mill used as a dryer and / or to pump the suspension directly into the grinding chamber via a nozzle inlet. This accelerates drying.
  • Another advantage of the method according to the invention is that the agglomerate-free drying with a surface treatment the powder can be combined. This can be done, for example, by introducing the surface treatment agent together with the carrier air. Another possibility is that the treatment agent is sprayed into the grinding chamber of the mill through a nozzle.
  • Figures 1 and 2 show systems for performing the method according to the invention.
  • the schematically illustrated mechanical mill in which the powder is wet-ground is designated by 1.
  • the product is continuously conveyed through line 3 to the air vortex mill 4 serving as a dryer and injected into the grinding or drying chamber 5 via a nozzle, not shown in detail.
  • Air is supplied to the drying room 5 from below via the line 6.
  • the hot air generator arranged in line 6 is designated by 7.
  • the dried powder leaves the air vortex mill 4 used as a dryer through the upper product discharge 8 and reaches via line 9 into a commercially available filter cyclone 11, in which air and dried powder are separated.
  • the air leaves the cyclone 11 via the line 12 with the fan 13.
  • the powder exits through the product discharge 14.
  • the suspension leaving the mechanical mill 1 can be injected into the drying chamber 5 of the dryer 4 at various points.
  • the line 3 with the pump 2 can open into nozzles which are arranged at different heights.
  • a line 3 'leading to the upper region of the drying chamber and the pump 2' is shown in broken lines.
  • the choice of the location of the injection into the drying room 5 depends on the properties of the product and / or on the desired length of stay in the dryer 4.
  • the line 3 with the pump 2 opens into the lower region of the drying chamber 5 of the dryer 4.
  • a line 15 with the pump 16 opens into the upper region, preferably also via a nozzle, and connects to the container 18 in Connection is established.
  • the container 18 there is a surface treatment agent for the powder to be dried.
  • An alternative to this is shown in dashed lines, in which surface treatment agent, preferably in powder form, is introduced into the air intake of the dryer 4.
  • the line 19 opening into the air line 6 is provided with the blower 21, which is connected to the container 22 containing the agent.
  • the drying chamber 5 of the dryer 4 is supplied with hot air via line 6 and the suspension with the powder to be dried via line 3 (or 3 ′).
  • the powder is dried quickly, gently and without agglomerates within the large number of air vortices generated, e.g. to residual moisture of 0.5% and less.
  • the dried powder and the air leave the dryer 4 via the discharge 8 and are separated from one another in the cyclone 11.
  • a liquid treatment agent can be injected into the upper region of the drying chamber 5.
  • the product injected into the lower area is already dry, so that moisture adhering to the powder does not interfere with the desired coating.
  • the treatment agent can also be introduced into the hot air stream in line 6. This also applies to dry surface treatment agents that are in powder form e.g. be metered into the air intake of the dryer 4.
  • the water evaporates spontaneously without the products having a chance of re-agglomeration.
  • the typical inlet temperatures are between 200 ° and 400 ° C, in some special cases up to 500 ° C, the typical outlet temperatures of the mill are between 70 ° and 110 ° C. In a very short time, a temperature gradient of sometimes well over 300 ° C reached.
  • a coating of the product can e.g. be carried out with powdered stearate or with liquid stearic acid.
  • Stearate is preferably metered into the hot air intake, stearin into the drying room 5 (see FIG. 2).
  • Successful tests have been carried out with calcium carbonate and chalk (input TS each about 60%) as well as pigments and hydrated lime (input TS each about 30%).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Drying Of Solid Materials (AREA)
EP97104100A 1996-03-21 1997-03-12 Procédé et dispositif pour la fabrication de poudres ultrafines Expired - Lifetime EP0796660B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19611112A DE19611112C2 (de) 1996-03-21 1996-03-21 Verfahren und Vorrichtung zur Herstellung von extrem feinen Pulvern
DE19611112 1996-03-21
US08/985,535 US5984212A (en) 1996-03-21 1997-12-05 Method and apparatus for production of extremely fine powder

Publications (2)

Publication Number Publication Date
EP0796660A1 true EP0796660A1 (fr) 1997-09-24
EP0796660B1 EP0796660B1 (fr) 2000-06-14

Family

ID=26023990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104100A Expired - Lifetime EP0796660B1 (fr) 1996-03-21 1997-03-12 Procédé et dispositif pour la fabrication de poudres ultrafines

Country Status (3)

Country Link
US (1) US5984212A (fr)
EP (1) EP0796660B1 (fr)
DE (1) DE19611112C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998051413A1 (fr) * 1997-05-12 1998-11-19 Bayer Aktiengesellschaft Moulin a microtourbillon et procede pour le sechage et la desagglomeration de materiaux en poudre
DE19909223A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Beseitigung von spezifisch schweren Verunreinigungen aus dem Eingangsmaterial eines Turbo-Rotors
DE19909221A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Pulverisierung eines Materials in einer Mühle
DE19909222A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Regelung der Temperatur in einem Turbo-Rotor
EP1555286A2 (fr) * 2002-10-16 2005-07-20 Nabaltec GmbH Procédé pour la préparation d'un ignifuge et procédé pour la préparation d'une composition ignifuge de polymère
WO2007006456A2 (fr) * 2005-07-09 2007-01-18 Tronox Pigments Gmbh Production de pigments de dioxyde de titane au moyen d'un moulin a tourbillon d'air
EP1787722A2 (fr) 2005-11-22 2007-05-23 Altenburger Maschinen Jäckering GmbH Procédé et dispositif pour broyer et sécher des produits fluides
WO2008001226A2 (fr) * 2006-06-21 2008-01-03 Martinswerk, Gmbh Procédé de production de particules d'hydroxyde d'aluminium
WO2008053355A2 (fr) * 2006-06-21 2008-05-08 Martinswerk Gmbh Particules d'hydroxyde enduites d'aluminium produites par séchage-broyage
EP2724780A1 (fr) * 2012-10-26 2014-04-30 Evonik Degussa GmbH Procédé de fabrication d'un mélange d'isolation thermique

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6143221A (en) * 1999-03-12 2000-11-07 Tamer International, Ltd. Agglomerating and drying apparatus
US6270708B1 (en) * 1999-03-12 2001-08-07 Tamer International, Ltd. Agglomerating and drying apparatus
US20040000069A1 (en) * 1999-03-12 2004-01-01 Gurol I. Macit Agglomerating and drying apparatus
DE10148851A1 (de) * 2001-10-04 2003-04-17 Henkel Kgaa Puder- und Färbehilfsstoffe
US20050132893A1 (en) * 2003-12-17 2005-06-23 Kraft Foods Holdings, Inc. Process for single-stage heat treatment and grinding of coffee beans
US20060029703A1 (en) * 2004-08-06 2006-02-09 Kraft Foods Holdings, Inc. Process for single-stage heat treatment and grinding of mustard bran, and product and its uses
US20060040027A1 (en) * 2004-08-17 2006-02-23 Kraft Foods Holdings, Inc. Process for manufacture of grated cheese and uses thereof
US7445806B2 (en) * 2004-09-02 2008-11-04 Kraft Foods Global Brands Llc Process for selective grinding and recovery of dual-density foods
US20060083834A1 (en) * 2004-10-14 2006-04-20 Kraft Foods Holdings, Inc. Process for granulation of wet processed foods and use thereof
US20060088634A1 (en) * 2004-10-25 2006-04-27 Kraft Foods Holdings, Inc. Process for granulation of low-moisture processed foods and use thereof
US20060277887A1 (en) * 2005-05-31 2006-12-14 Nutragon, Llc Method for processing organic plant matter into dry powder, oil and juice products
US20060286232A1 (en) * 2005-06-15 2006-12-21 Kraft Foods Holdings, Inc. Process for granulation of low-moisture, high-lipid content processed foods and re-use thereof
US20060286230A1 (en) * 2005-06-15 2006-12-21 Kraft Foods Holdings, Inc. Process for packing separation and granulation of processed food content thereof, and products and uses thereof
US20060286246A1 (en) * 2005-06-16 2006-12-21 Kraft Foods Holdings, Inc. Preparation of bakery mixes
US20060286269A1 (en) * 2005-06-16 2006-12-21 Kraft Foods Holdings, Inc. Process for granulation of edible seeds
ES2310784T3 (es) * 2005-06-16 2009-01-16 KRAFT FOODS R & D, INC. ZWEIGNIEDERLASSUNG MUNCHEN Proceso para moler cascaras de cacao y productos comestibles granulares de las mismas.
US8067051B2 (en) * 2006-06-19 2011-11-29 Kraft Foods R & D, Inc. Process for milling cocoa shells
DE102006037362B3 (de) * 2006-08-09 2007-09-20 Heraeus Kulzer Gmbh Knochenersatzmaterial
GB2482032B (en) 2010-07-16 2013-04-10 Kraft Foods R & D Inc Coffee products and related processes
CN113457816B (zh) * 2021-07-01 2022-08-19 厦门艾思欧标准砂有限公司 一种采用立式研磨机制备球形化粉体的系统及工艺
CN114146805B (zh) * 2021-11-23 2023-01-06 济南鲁洪环保材料有限公司 空气助力工艺
CN116603589B (zh) * 2023-07-20 2023-09-12 中国水利水电第十四工程局有限公司 一种市政沟槽工程用破碎清理装置

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GB2132128A (en) * 1982-10-18 1984-07-04 Freunt Ind Co Ltd A granulating and coating machine
EP0226900A2 (fr) * 1985-12-07 1987-07-01 Altenburger Maschinen Jäckering GmbH Broyeur à plusieurs étages
DE3811910A1 (de) * 1988-04-09 1989-10-19 Mahltechnik Goergens Gmbh Muehle und verfahren zum gleichzeitigen mahlen und trocknen eines feuchten produkts
EP0406903A1 (fr) * 1989-07-07 1991-01-09 Freund Industrial Co., Ltd. Appareil pour granuler et enrober et méthode d'agglomération et d'enrobage utilisant cet appareil
DE4200827A1 (de) * 1992-01-15 1993-07-22 Jackering Altenburger Masch Verfahren und vorrichtung zur erfassung eines kunststoffes oder gummi aus einem abfallgemisch
DE4204600A1 (de) * 1992-02-15 1993-08-19 Erwin Dr Oser Verfahren zur nassmahlung und einrichtung dazu
DE29515434U1 (de) * 1995-09-27 1995-11-23 Mahltechnik Görgens GmbH, 41541 Dormagen Micro-Wirbel-Mühle

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FR2523477B1 (fr) * 1982-03-17 1989-06-09 Visch Maschinnoelektrotechnits Procede et dispositif de micronisation de matieres collantes a l'aide de tourbillons diriges
IT1169103B (it) * 1983-02-21 1987-05-27 Antonio Faulin Suola per scarpa da sci
GB2190016B (en) * 1985-08-01 1989-07-26 Ecc Int Ltd Communition of material
DE4137901C2 (de) * 1991-11-18 1998-10-01 Bernd Dipl Chem Dr Kroeckert Verfahren zur Strahlmahlung von anorganischen Pigmenten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132128A (en) * 1982-10-18 1984-07-04 Freunt Ind Co Ltd A granulating and coating machine
EP0226900A2 (fr) * 1985-12-07 1987-07-01 Altenburger Maschinen Jäckering GmbH Broyeur à plusieurs étages
DE3811910A1 (de) * 1988-04-09 1989-10-19 Mahltechnik Goergens Gmbh Muehle und verfahren zum gleichzeitigen mahlen und trocknen eines feuchten produkts
EP0406903A1 (fr) * 1989-07-07 1991-01-09 Freund Industrial Co., Ltd. Appareil pour granuler et enrober et méthode d'agglomération et d'enrobage utilisant cet appareil
DE4200827A1 (de) * 1992-01-15 1993-07-22 Jackering Altenburger Masch Verfahren und vorrichtung zur erfassung eines kunststoffes oder gummi aus einem abfallgemisch
DE4204600A1 (de) * 1992-02-15 1993-08-19 Erwin Dr Oser Verfahren zur nassmahlung und einrichtung dazu
DE29515434U1 (de) * 1995-09-27 1995-11-23 Mahltechnik Görgens GmbH, 41541 Dormagen Micro-Wirbel-Mühle

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998051413A1 (fr) * 1997-05-12 1998-11-19 Bayer Aktiengesellschaft Moulin a microtourbillon et procede pour le sechage et la desagglomeration de materiaux en poudre
DE19909223A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Beseitigung von spezifisch schweren Verunreinigungen aus dem Eingangsmaterial eines Turbo-Rotors
DE19909221A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Pulverisierung eines Materials in einer Mühle
DE19909222A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Regelung der Temperatur in einem Turbo-Rotor
EP1555286A2 (fr) * 2002-10-16 2005-07-20 Nabaltec GmbH Procédé pour la préparation d'un ignifuge et procédé pour la préparation d'une composition ignifuge de polymère
EP1555286A3 (fr) * 2002-10-16 2011-08-17 Nabaltec AG Procédé pour la préparation d'un ignifuge et procédé pour la préparation d'une composition ignifuge de polymère
WO2007006456A2 (fr) * 2005-07-09 2007-01-18 Tronox Pigments Gmbh Production de pigments de dioxyde de titane au moyen d'un moulin a tourbillon d'air
WO2007006456A3 (fr) * 2005-07-09 2007-05-24 Tronox Pigments Gmbh Production de pigments de dioxyde de titane au moyen d'un moulin a tourbillon d'air
EP1787722A2 (fr) 2005-11-22 2007-05-23 Altenburger Maschinen Jäckering GmbH Procédé et dispositif pour broyer et sécher des produits fluides
DE102005055563A1 (de) * 2005-11-22 2007-05-24 Altenburger Maschinen Jäckering GmbH Luftwirbelmühle für die Mahltrocknung eines strömungsfähigen Produkts sowie Verfahren zum Betrieb dieser Mühle
US7762483B2 (en) 2005-11-22 2010-07-27 Altenburger Maschinen Jäckering GmbH Air vortex mill for mill drying a flowable product and method for using the mill
WO2008004131A3 (fr) * 2006-06-21 2008-05-22 Martinswerk Gmbh Procédé de production de particules de trihydroxyde d'aluminium thermiquement stables par broyage-séchage d'un gâteau de filtration
WO2008146088A2 (fr) * 2006-06-21 2008-12-04 Martinswerk Gmbh Procédé de fabrication d'hydroxyde de magnésium
WO2008047237A2 (fr) * 2006-06-21 2008-04-24 Martinswerk Gmbh Procédé servant à produire des particules d'hydroxyde d'aluminium
WO2008053355A2 (fr) * 2006-06-21 2008-05-08 Martinswerk Gmbh Particules d'hydroxyde enduites d'aluminium produites par séchage-broyage
WO2008020324A3 (fr) * 2006-06-21 2008-05-22 Martinswerk Gmbh Procédé de fabrication de particules de trihydroxyde d'aluminium thermiquement stables par séchage en broyeur d'une pâte
WO2008015579A2 (fr) * 2006-06-21 2008-02-07 Martinswerk Gmbh Utilisation du séchage en moulin et de la désagrégation pour produire des particules de trihydroxyde d'aluminium thermiquement stables à partir d'un composé contenant l'hydrate d'alumine
WO2008015579A3 (fr) * 2006-06-21 2008-05-29 Martinswerk Gmbh Utilisation du séchage en moulin et de la désagrégation pour produire des particules de trihydroxyde d'aluminium thermiquement stables à partir d'un composé contenant l'hydrate d'alumine
WO2008001226A3 (fr) * 2006-06-21 2008-06-05 Martinswerk Gmbh Procédé de production de particules d'hydroxyde d'aluminium
WO2008053355A3 (fr) * 2006-06-21 2008-11-13 Martinswerk Gmbh Particules d'hydroxyde enduites d'aluminium produites par séchage-broyage
WO2008047237A3 (fr) * 2006-06-21 2008-11-13 Martinswerk Gmbh Procédé servant à produire des particules d'hydroxyde d'aluminium
WO2008146089A2 (fr) * 2006-06-21 2008-12-04 Martinswerk Gmbh Procédé de fabrication d'hydroxyde de magnésium
WO2008020324A2 (fr) * 2006-06-21 2008-02-21 Martinswerk Gmbh Procédé de fabrication de particules de trihydroxyde d'aluminium thermiquement stables par séchage en broyeur d'une pâte
WO2008152450A2 (fr) * 2006-06-21 2008-12-18 Martinswerk Gmbh Particules d'hydroxyde d'aluminium enrobées, obtenues par séchage par broyage
WO2008152451A2 (fr) * 2006-06-21 2008-12-18 Martinswerk Gmbh Utilisation du séchage par broyage et de la désagglomération pour produire des particules de trihydroxyde d'aluminium (ath), thermiquement stables, à partir d'un gâteau de filtration contenant de l'ath
WO2008152451A3 (fr) * 2006-06-21 2009-03-05 Martinswerk Gmbh Utilisation du séchage par broyage et de la désagglomération pour produire des particules de trihydroxyde d'aluminium (ath), thermiquement stables, à partir d'un gâteau de filtration contenant de l'ath
WO2008152450A3 (fr) * 2006-06-21 2009-07-02 Martinswerk Gmbh Particules d'hydroxyde d'aluminium enrobées, obtenues par séchage par broyage
WO2008146089A3 (fr) * 2006-06-21 2009-09-11 Martinswerk Gmbh Procédé de fabrication d'hydroxyde de magnésium
WO2008146088A3 (fr) * 2006-06-21 2009-09-17 Martinswerk Gmbh Procédé de fabrication d'hydroxyde de magnésium
WO2008004131A2 (fr) * 2006-06-21 2008-01-10 Martinswerk Gmbh Procédé de production de particules de trihydroxyde d'aluminium thermiquement stables par broyage-séchage d'un gâteau de filtration
WO2008001226A2 (fr) * 2006-06-21 2008-01-03 Martinswerk, Gmbh Procédé de production de particules d'hydroxyde d'aluminium
EP2724780A1 (fr) * 2012-10-26 2014-04-30 Evonik Degussa GmbH Procédé de fabrication d'un mélange d'isolation thermique
WO2014063949A1 (fr) * 2012-10-26 2014-05-01 Evonik Degussa Gmbh Procédé de fabrication d'un mélange thermo-isolant
US9784402B2 (en) 2012-10-26 2017-10-10 Evonik Degussa Gmbh Method for producing a thermally insulating mixture

Also Published As

Publication number Publication date
EP0796660B1 (fr) 2000-06-14
DE19611112A1 (de) 1997-09-25
DE19611112C2 (de) 2002-04-18
US5984212A (en) 1999-11-16

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