[go: up one dir, main page]

WO1989004220A1 - Procede et appareil de classage de particules - Google Patents

Procede et appareil de classage de particules Download PDF

Info

Publication number
WO1989004220A1
WO1989004220A1 PCT/GB1988/000965 GB8800965W WO8904220A1 WO 1989004220 A1 WO1989004220 A1 WO 1989004220A1 GB 8800965 W GB8800965 W GB 8800965W WO 8904220 A1 WO8904220 A1 WO 8904220A1
Authority
WO
WIPO (PCT)
Prior art keywords
ducting
particles
floor
passing
gas
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.)
Ceased
Application number
PCT/GB1988/000965
Other languages
English (en)
Inventor
Alan Davis
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1989004220A1 publication Critical patent/WO1989004220A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02—Arrangement of air or material conditioning accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall

Definitions

  • the invention relates to the classification of particles for example powders.
  • the invention is of especial use in the classification of metal or alloy powders in substantially dry form.
  • Metal powders are used for example in metal spraying of eroded components to build up the component.
  • metal spraying of eroded components to build up the component.
  • a method of classifying particles into separate groups comprising the steps of; - passing heated gas through a length of ducting, the upper wall of which extends upwardly at an angle to the horizontal,
  • the upper wall of the ducting extends upwardly between a minimum angle of about 20° and a maximum angle of about 30°, in order that the apparatus is compact and yet still provides efficient and finely divided classification.
  • the heated gas is air at a uniform pressure and velocity and caused to flow in laminar convection currents through the ducting.
  • the gas may be instead a gas inert with respect to the particles, eg, nitrogen or a noble gas.
  • the particles to be treated are preferably substantially dry so that their mass remains constant during travel through the apparatus.
  • the thermal currents tend to rise against the gravitational fall of the particles and the particles are suspended in the currents for a short time and have a short vertical and horizontal trajectory only.
  • the particles are subject to a small force and the air turbulence is low.
  • the classification is very efficient and the different classes of particles can be finely divided.
  • the invention provides apparatus for use in the method.
  • the invention also extends to particles that have been classified by the method.
  • Figure 1 is a schematic cross sectional view of apparatus according to the invention.
  • Figure 2 is a view to an enlarged scale along line A-A on Figure 1.
  • a hopper 1 contains a mixture of metal particles 2 of varying sizes together with ceramic inclusions and the like. There is an outlet 3 in the bottom of the hopper 1 through which the particles pass into a rotary screw feed 4 which is driven by a motor (not shown) .
  • the screw feed 4 supplies the particles 2 through an inlet 5 at the top of a vertical length of ducting 6.
  • a powder divider 7 is mounted within the ducting 6 and comprises a first generally triangular sheet 8 mounted vertically within the ducting. Two smaller triangles 8 are mounted underneath the first, and four yet smaller triangles
  • particles 2 are fed to the apex of the first triangle 8 and flows down the diverging sides thereof.
  • the two streams of particles then pass down the diverging sides of the second row of triangles 8 and then finally the third row so that eight sub-streams of particles flow onto a chute
  • the chute 9 mounted at the bottom of the ducting 6.
  • the chute 9 extends across path of the streams of particles at an angle of 60° to the horizontal and is oscillated in its own plane by a motor and springs or the like.
  • the classifying chamber 10 comprises a length of ducting 11 formed from steel sheeting or the like.
  • the ducting 11 includes an upper wall 12 which extends at an angle of betv/een 20° and 30° to the horizontal.
  • the floor of the ducting 11 defines four longitudinally spaced apart receptacles or collecting bins 13 which have valves 14 by which the bins may be emptied.
  • An electric heater 15 is mounted down stream of the chamber 10 and further ducting 11 leads from the heater 15 towards the chamber 10, the ducting 11 being of sufficient length to allow the thermal currents 16 produced by the heater 15 to settle into a laminar flow at a constant velocity and pressure.
  • a baffle plate 19 is located on the floor of the ducting 11 adjacent the entrance to the chamber 10 to direct the flow of gas towards the upper wall 12 of the chamber.
  • a cyclone 17 or pair of electrostatic plates may be disposed adjacent the outlet end 18 of the apparatus to collect the very fine dusts that have passed straight through.
  • the temperature of the thermal currents may be preset to a value dependent on the type of particles to be classified, eg, according to range of sizes, mass and shape.
  • the temperature is preferably maintained at: + 1°C.. In tests, I have found that a temperature of about 30°C is sufficient for fairly light particles such as aluminium, while a higher temperature such as 70°C is required for heavier particles.
  • the particles 2 are fed by the screw drive 4 from the hopper 1 and a "curtain" of particles is passed from the chute 9 into the laminar air flow 16.
  • the angle of the chute 9 ensures that air does not convect upwards and disrupt the particle flow.
  • the larger or heavier particles fall into the first collecting bin 11 while the smaller or lighter particles are carried along within the convection currents to fall within the further collecting bins 11.
  • the apparatus was according to that shown in the drawings but including three spaced collecting bins 11.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

Un procédé de classage de particules ou de grains (2) en groupes séparés selon leur masse ou leur grandeur consiste: à faire passer des courants d'air de convexion (16) à travers un segment d'un conduit (11), dont la paroi supérieure (12) forme un angle par rapport à l'horizontale; à faire passer les particules dans le courant d'air (16) à l'intérieur du conduit; et à laisser les particules tomber ou à les amener à tomber dans plusieurs récipients séparés (13) espacés longitudinalement le long du plancher du conduit.
PCT/GB1988/000965 1987-11-09 1988-11-09 Procede et appareil de classage de particules Ceased WO1989004220A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8726170A GB2212075B (en) 1987-11-09 1987-11-09 Thermal dry powder classification system
GB8726170 1987-11-09

Publications (1)

Publication Number Publication Date
WO1989004220A1 true WO1989004220A1 (fr) 1989-05-18

Family

ID=10626645

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1988/000965 Ceased WO1989004220A1 (fr) 1987-11-09 1988-11-09 Procede et appareil de classage de particules

Country Status (5)

Country Link
EP (1) EP0395675A1 (fr)
JP (1) JPH03500741A (fr)
AU (1) AU2625788A (fr)
GB (1) GB2212075B (fr)
WO (1) WO1989004220A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631826A1 (fr) * 1993-06-26 1995-01-04 SCHENKMANN & PIEL, VERFAHRENSTECHNIK GmbH & Co. KG Procédé et dispositif de séparation pneumatique
DE19510923A1 (de) * 1995-03-24 1996-10-10 Wipag Polymertechnik Peter Wie Verfahren und Einrichtung zum Trennen eines bei der Aufarbeitung von Verbundwerkstoffteilen anfallenden Partikelgemisches in mindestens zwei Partikelfraktionen
RU2209692C1 (ru) * 2002-01-08 2003-08-10 Кубанский государственный аграрный университет Устройство для сепарации сыпучей смеси
WO2014000132A1 (fr) * 2012-06-27 2014-01-03 山东亿恺仓储工程有限公司 Séparateur de sélection de grain

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1151898C (zh) * 2002-08-06 2004-06-02 王训明 一种物料就地分选的方法
CN107890995B (zh) * 2017-12-06 2019-11-08 湖北中烟工业有限责任公司 一种管道式烟梗除轻杂设备
CN108212791A (zh) * 2018-02-27 2018-06-29 芜湖鸣人热能设备有限公司 颗粒物料筛选除杂装置
CN110665807A (zh) * 2019-10-16 2020-01-10 上海电气集团股份有限公司 筛分装置及金属粉末的筛分方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR828125A (fr) * 1937-01-21 1938-05-11 Trieur séparateur
DE1134941B (de) * 1958-10-15 1962-08-23 Svenska Flaektfabriken Ab Freifall-Sichter zur Aufbereitung koerniger, pulverfoermiger oder spaeneartiger Stoffe
FR1396198A (fr) * 1964-05-26 1965-04-16 Davidson & Co Ltd Dispositif formant classeur pneumatique ou analogue et ses diverses applications
EP0040483A2 (fr) * 1980-05-15 1981-11-25 Roc-Tec, Inc. Procédé et dispositif pour classer des particules de matière pulvérulente
DE3245942A1 (de) * 1982-12-11 1984-07-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Gegenstrom-umlenksichter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR828125A (fr) * 1937-01-21 1938-05-11 Trieur séparateur
DE1134941B (de) * 1958-10-15 1962-08-23 Svenska Flaektfabriken Ab Freifall-Sichter zur Aufbereitung koerniger, pulverfoermiger oder spaeneartiger Stoffe
FR1396198A (fr) * 1964-05-26 1965-04-16 Davidson & Co Ltd Dispositif formant classeur pneumatique ou analogue et ses diverses applications
EP0040483A2 (fr) * 1980-05-15 1981-11-25 Roc-Tec, Inc. Procédé et dispositif pour classer des particules de matière pulvérulente
DE3245942A1 (de) * 1982-12-11 1984-07-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Gegenstrom-umlenksichter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631826A1 (fr) * 1993-06-26 1995-01-04 SCHENKMANN & PIEL, VERFAHRENSTECHNIK GmbH & Co. KG Procédé et dispositif de séparation pneumatique
DE19510923A1 (de) * 1995-03-24 1996-10-10 Wipag Polymertechnik Peter Wie Verfahren und Einrichtung zum Trennen eines bei der Aufarbeitung von Verbundwerkstoffteilen anfallenden Partikelgemisches in mindestens zwei Partikelfraktionen
DE19510923B4 (de) * 1995-03-24 2007-04-05 WIPAG Süd GmbH & Co. KG Verfahren und Einrichtung zum Trennen eines bei der Aufarbeitung von Verbundwerkstoffteilen anfallenden Partikelgemisches in mindestens zwei Partikelfraktionen
RU2209692C1 (ru) * 2002-01-08 2003-08-10 Кубанский государственный аграрный университет Устройство для сепарации сыпучей смеси
WO2014000132A1 (fr) * 2012-06-27 2014-01-03 山东亿恺仓储工程有限公司 Séparateur de sélection de grain

Also Published As

Publication number Publication date
AU2625788A (en) 1989-06-01
GB2212075A (en) 1989-07-19
JPH03500741A (ja) 1991-02-21
EP0395675A1 (fr) 1990-11-07
GB2212075B (en) 1991-11-27
GB8726170D0 (en) 1987-12-16

Similar Documents

Publication Publication Date Title
US5032256A (en) Method and apparatus for air separation of material
US7105041B2 (en) Grid type electrostatic separator/collector and method of using same
US4153541A (en) Method and apparatus for the continuous centrifugal classifying of a continuous flow of particulate material in a deflected flow
US4213852A (en) Method and apparatus for particle classification
US4950388A (en) Separation of mixtures in a wind tunnel
WO1989004220A1 (fr) Procede et appareil de classage de particules
EP0267948A1 (fr) Procede et appareil de separation
CA2420303C (fr) Appareil de triage de copeaux de bois en fractions separees
US4519896A (en) Dry material sorting device
EP0478280A2 (fr) Séparateur pour petites particules
RU2132242C1 (ru) Способ аэродинамической классификации металлических порошков и установка для его осуществления
EP0809534A1 (fr) Separateur de matieres minerales
US4640768A (en) Elutriation apparatus for the purification and separation of powders of different densities
US2389701A (en) Pneumatic sizing
JPH0665393B2 (ja) 粒度による粒子分離装置および方法
NL8103586A (nl) Werkwijze en inrichting voor het scheiden van zand uit botanisch fijnkool.
EP4037845B1 (fr) Dispositif pour le tri de particules de poudre
SU1755946A1 (ru) Пневматический классификатор
WO2002024352A1 (fr) Dispositif permettant de repartir des copeaux de bois en fractions distinctes
US4759840A (en) Particle classifier
AU570554B2 (en) Dry material sorting device
JPS6038072A (ja) 粒状材料を分別するための分別装置
AU592010B2 (en) Separation of mixtures in a wind tunnel
CA1125705A (fr) Separateur pneumatique a debut d'air laminaire pour le recyclage du mica
TR2021008174A2 (tr) Havali toz siniflandirma ci̇hazi

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP KR SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1988909590

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1988909590

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1988909590

Country of ref document: EP