EP0191696A2 - Festpartikel-Schleudervorrichtung für Zentrifugalzerkleinerer im Vakuum - Google Patents

Festpartikel-Schleudervorrichtung für Zentrifugalzerkleinerer im Vakuum Download PDF

Info

Publication number
EP0191696A2
EP0191696A2 EP86400256A EP86400256A EP0191696A2 EP 0191696 A2 EP0191696 A2 EP 0191696A2 EP 86400256 A EP86400256 A EP 86400256A EP 86400256 A EP86400256 A EP 86400256A EP 0191696 A2 EP0191696 A2 EP 0191696A2
Authority
EP
European Patent Office
Prior art keywords
wheel
curve
particles
channels
friction
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
EP86400256A
Other languages
English (en)
French (fr)
Other versions
EP0191696B1 (de
EP0191696A3 (en
Inventor
Gérard Sevelinge
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Priority to AT86400256T priority Critical patent/ATE46830T1/de
Publication of EP0191696A2 publication Critical patent/EP0191696A2/de
Publication of EP0191696A3 publication Critical patent/EP0191696A3/fr
Application granted granted Critical
Publication of EP0191696B1 publication Critical patent/EP0191696B1/de
Expired legal-status Critical Current

Links

Images

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
    • 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
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B02C13/1842—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements

Definitions

  • the present invention relates to a device for projecting solid particles for a vacuum mill in which the particles to be ground are sprayed by centrifugal force on an impact surface arranged inside a vacuum enclosure.
  • a vacuum crusher comprises a closed enclosure resistant to pressure and evacuated and at the upper part of which is placed a distributor wheel driven in rotation at high speed.
  • the wheel is provided in its axis with a central feed chamber provided at its upper part with an axial orifice formed at the bottom of a hopper supplied with material to be ground by means of a metering device, for example screw, placed at the outlet of a supply chamber forming an airlock and which makes it possible to introduce the material into the vacuum enclosure.
  • the distributing wheel is also provided with a plurality of projection channels whose axes are centered in a median plane perpendicular to the axis and which open inwards into the supply chamber and outwards on the periphery of the wheel.
  • the material introduced by the metering device into the central feed chamber is therefore driven by centrifugal effect in the channels and projected at the outlet of these on a set of plates forming targets and which are placed all around the wheel. , along the side wall of the enclosure.
  • the lower part of it is form a hopper and collects the fine powder formed by the bursting of the grains of material thus projected onto the targets by the channels of the wheel.
  • a radial and tangential acceleration is created inside the channels, making it possible to obtain the desired speed at the outlet.
  • a contact effect between the particles and the wheel which depends on the speed of rotation and consequently a phenomenon of wear of the channels, in particular at the outlet of the wheel.
  • This abrasion phenomenon depends on the physical properties of the particles, but is always very important as soon as the ejection speed also becomes high, having regard to the high value of the particle-wheel contact effect and the relative speed of displacement of particles in the channels.
  • the subject of the invention is a new embodiment of a grinder wheel which makes it possible to remedy these drawbacks, by reducing the speed of movement of the particles in the projecting channels. while maintaining the same ejection speed.
  • the guide face of the particles in each channel has a positive curve, that is to say a curve winding in the same direction of rotation of the distributor wheel, and whose carefully calculated path, in as a function of the coefficients of friction of the materials in contact, it attaches to this curve a stable layer of self-protection constituted by the particles themselves, with automatic regeneration of said layer at the same time as its wear.
  • a cylindrical enclosure 1 with a vertical axis at the upper part of which is disposed a vertical duct of large section 2 having a branch on which is fixed a duct 3 connected to a vacuum pump not shown.
  • a duct 3 connected to a vacuum pump not shown.
  • hoppers 4 and 5 Inside the duct 2 are arranged hoppers 4 and 5.
  • the hopper 5 is connected to a vibrator 6.
  • a hopper 7 secured to a wheel 20 constituting the upper part of the rotor. This wheel is pierced with several radial direction channels such as 21 and 22 regularly distributed.
  • a target 8 is arranged, the impact surface of which is covered with a material resistant to wear and impact.
  • deflectors 9 fixed to a hopper which can be vibrating 10 whose role is to collect the crushed powdery material to direct it towards the outlet 11 connected to a set of vacuum airlocks allowing the flow of the product without breaking the vacuum in the enclosure.
  • the wheel 20 constituting the upper part of the rotor of the mill is secured to an elongated cylindrical tubular shaft 12.
  • This shaft 12, driven by a motor 13, is guided and supported by a set of bearings and stops 14.
  • the motor 13 makes it possible to drive the wheel 20 in rotation at very high speeds.
  • Fig. 2 there is shown on a larger scale the dispensing wheel 20 inside which are formed a supply chamber 23 and two channels 21 and 22 opening at their ends inwards into the supply chamber 23 and towards the outside on the periphery of the wheel by evacuation orifices 24 and 25.
  • the granular material penetrates into the feed chamber 23 and is projected outwards, by centrifugal effect passing through the channels 21 and 22.
  • the particles thus projected by the channels strike the target 8 and are reduced to a fine powder. .
  • Granular materials for example of ci ment or pulverized coal, treated in centrifugal mills being quite abrasive, we find in mills of this type used until now, a fairly rapid wear of the internal side wall of the projection channels, and in particular of the orifice of peripheral output.
  • the invention makes it possible to avoid this wear phenomenon by giving the distribution channels a particular and determined curve.
  • the friction face of each channel, on which the grains are projected has a positive curve A, that is to say a curve which winds in the same direction ⁇ as the rotation of the distributor wheel 20 .
  • This curve A the layout of which is judiciously calculated, as a function of the coefficients of friction of the materials in contact, that is to say as a function of the material constituting the distributing wheel and of the particles to be projected, allows the attachment to this curve A a stable layer 30 (FIG. 3) constituted by the particles themselves, thus providing effective protection of the distributor wheel.
  • the distributing wheel 20 must rotate at a greater or lesser speed. But in all cases we will get the creation of a protective mattress, because particle plating is independent of the speed of rotation of the wheel.
  • Self-protection of the channels is therefore carried out by the product itself, which avoids any abrasion phenomenon, while maintaining a sufficient speed of rotation of the distributing wheel to obtain the desired particle size.
  • a substantially flat or disk-shaped wheel it is also possible to use, for example, a hemispherical bowl, but the principle of tracing the channels remains the same to obtain the attachment of a film of particles to spray which serves as a protective layer for the channels and prevents abrasion by particles.
  • the number of ejection channels depends on the flow to be produced and the diameter of the distributor wheel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Glanulating (AREA)
  • Disintegrating Or Milling (AREA)
EP86400256A 1985-02-15 1986-02-06 Festpartikel-Schleudervorrichtung für Zentrifugalzerkleinerer im Vakuum Expired EP0191696B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400256T ATE46830T1 (de) 1985-02-15 1986-02-06 Festpartikel-schleudervorrichtung fuer zentrifugalzerkleinerer im vakuum.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8502234 1985-02-15
FR8502234A FR2577445B1 (fr) 1985-02-15 1985-02-15 Dispositif de projection de particules solides pour broyeur centrifuge sous vide

Publications (3)

Publication Number Publication Date
EP0191696A2 true EP0191696A2 (de) 1986-08-20
EP0191696A3 EP0191696A3 (en) 1987-12-23
EP0191696B1 EP0191696B1 (de) 1989-10-04

Family

ID=9316334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400256A Expired EP0191696B1 (de) 1985-02-15 1986-02-06 Festpartikel-Schleudervorrichtung für Zentrifugalzerkleinerer im Vakuum

Country Status (9)

Country Link
US (1) US4682739A (de)
EP (1) EP0191696B1 (de)
CN (1) CN86100993B (de)
AT (1) ATE46830T1 (de)
AU (1) AU583088B2 (de)
CA (1) CA1243992A (de)
DE (1) DE3665990D1 (de)
FR (1) FR2577445B1 (de)
ZA (1) ZA86660B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233812A3 (en) * 1986-02-10 1989-01-04 Framatome Impeller for a vacuum impact crusher
FR2628007A1 (fr) * 1988-03-07 1989-09-08 Electricite De France Broyeur a percussion sous vide
EP0835690A1 (de) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Verfahren und Vorrichtung zum synchronisierten Prallzerkleinern von Material
WO2016092457A1 (fr) * 2014-12-09 2016-06-16 Frewitt Fabrique De Machines Sa Système et procédé de broyage sous vide

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011841A3 (fr) * 1998-03-17 2000-02-01 Magotteaux Int Ejecteur a une ou plusieurs poche(s).
RU2162014C1 (ru) * 1999-06-29 2001-01-20 Общество с ограниченной ответственностью компания "ИНАЛЕТ" Установка для измельчения сыпучих материалов
DE102011054086B4 (de) * 2011-09-30 2013-05-23 Thyssenkrupp Polysius Ag Walzenmühle und Verfahren zur Zerkleinerung von sprödem Mahlgut
CN103348796B (zh) * 2013-07-17 2015-07-08 梁华安 旋轮斗抛射式离心扬泥机
CN119303700B (zh) * 2024-10-22 2025-03-14 江苏山宝集团有限公司 复合制砂机及整形系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174697A (en) * 1962-07-30 1965-03-23 Adams Engineering Impeller
FR2194132A5 (de) * 1972-07-27 1974-02-22 Air Liquide
US3970257A (en) * 1972-10-05 1976-07-20 Macdonald George James Apparatus for reducing the size of discrete material
FR2347102A1 (fr) * 1976-04-07 1977-11-04 Planiol Rene Perfectionnements aux broyeurs centrifuges sous vide
FR2412348A1 (fr) * 1977-12-20 1979-07-20 Creusot Loire Surface d'impact pour un broyeur a projection sous vide
US4577806A (en) * 1983-11-18 1986-03-25 Acrowood Corporation Impeller assembly for an impact crusher
US4575014A (en) * 1984-06-27 1986-03-11 Rexnord Inc. Vertical shaft impact crusher rings
JPS6137629A (ja) * 1984-07-30 1986-02-22 Asahi Breweries Ltd 軽粉粒体処理装置における詰り防止方法及びその装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233812A3 (en) * 1986-02-10 1989-01-04 Framatome Impeller for a vacuum impact crusher
FR2628007A1 (fr) * 1988-03-07 1989-09-08 Electricite De France Broyeur a percussion sous vide
EP0835690A1 (de) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Verfahren und Vorrichtung zum synchronisierten Prallzerkleinern von Material
WO2016092457A1 (fr) * 2014-12-09 2016-06-16 Frewitt Fabrique De Machines Sa Système et procédé de broyage sous vide
US11376602B2 (en) 2014-12-09 2022-07-05 Frewitt Fabrique De Machines Sa Vacuum grinding system and method

Also Published As

Publication number Publication date
EP0191696B1 (de) 1989-10-04
ZA86660B (en) 1986-09-24
FR2577445A1 (fr) 1986-08-22
CA1243992A (en) 1988-11-01
US4682739A (en) 1987-07-28
EP0191696A3 (en) 1987-12-23
CN86100993A (zh) 1986-08-20
AU5295386A (en) 1986-08-21
DE3665990D1 (en) 1989-11-09
CN86100993B (zh) 1988-04-06
ATE46830T1 (de) 1989-10-15
FR2577445B1 (fr) 1988-05-27
AU583088B2 (en) 1989-04-20

Similar Documents

Publication Publication Date Title
EP0191696B1 (de) Festpartikel-Schleudervorrichtung für Zentrifugalzerkleinerer im Vakuum
EP3681647B1 (de) Entpackungsvorrichtung mit verbesserter reinigung
EP0233812B1 (de) Schleuderrad für unter Vakuum arbeitenden Prallbrecher
EP1388001A2 (de) Pulverdosiervorrichtung
EP3485975A1 (de) Zerkleinerungsvorrichtung, die einen hohen zerkleinerungsdurchsatz erlaubt sowie eine variation der grössenverteilung der zerkleinerten partikel
CA3193252A1 (fr) Appareil a tambour de separation d'emballages et matiere y adherant, a impact ecologique ameliore
FR2984184A1 (fr) Separateur magnetique
FR2507925A1 (fr) Broyeur pulverisateur
CH633488A5 (fr) Appareil d'alimentation en objets en forme de disques.
FR2635432A1 (fr) Distributeur de semoir de precision en au moins une ligne
CH251956A (fr) Procédé de broyage par voie humide et broyeur pour la mise en oeuvre du procédé.
EP1009529A1 (de) Verbesserungen an ringwalzenmühlen
EP3204163B1 (de) Mühle zum zerkleinern eines materialienbettes durch verdichten
JPS62221480A (ja) 塊状の製品を長さによつて分類するための装置
EP1396290A1 (de) Verfahren und Anordnung für die automatische morphologische Sortierung von in wesentlichen kugelförmigen Artikeln
FR2651155A1 (fr) Dispositif broyeur de produits pulverulents.
EP0645326B1 (de) Vorrichtung zum kontinuierlichen Dosieren
WO2024218459A1 (fr) Dispositif de tri pour dispositif de broyage et dispositif de broyage
FR2628007A1 (fr) Broyeur a percussion sous vide
FR2500157A1 (fr) Dispositif pour delivrer des doses pre-etablies de materiaux en poudre ou granulaires
FR2495018A1 (fr) Procede et appareil de broyage de materiaux
FR2776210A1 (fr) Systeme d'ejection a rouleaux pour broyeur a axe vertical
FR2667217A1 (fr) Procede et appareil pour la distribution d'un aliment particulaire pour animaux.
WO1994005427A1 (fr) Dispositif d'introduction ou d'alimentation d'un materiau dans un broyeur a axe vertical et broyeur equipe de ce dispositif
FR2590806A3 (fr) Dispositif de reduction dimensionnelle de particules de matiere en suspension

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE GB IT LI SE

17P Request for examination filed

Effective date: 19871123

17Q First examination report despatched

Effective date: 19881024

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI SE

REF Corresponds to:

Ref document number: 46830

Country of ref document: AT

Date of ref document: 19891015

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3665990

Country of ref document: DE

Date of ref document: 19891109

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19940124

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940217

Year of fee payment: 9

EAL Se: european patent in force in sweden

Ref document number: 86400256.3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19950206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950207

EUG Se: european patent has lapsed

Ref document number: 86400256.3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980123

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980126

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980127

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19980209

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990228

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990228

BERE Be: lapsed

Owner name: FRAMATOME

Effective date: 19990228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990206

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050206