Nothing Special   »   [go: up one dir, main page]

EP0298777A3 - Method of producing fine particles - Google Patents

Method of producing fine particles Download PDF

Info

Publication number
EP0298777A3
EP0298777A3 EP88306282A EP88306282A EP0298777A3 EP 0298777 A3 EP0298777 A3 EP 0298777A3 EP 88306282 A EP88306282 A EP 88306282A EP 88306282 A EP88306282 A EP 88306282A EP 0298777 A3 EP0298777 A3 EP 0298777A3
Authority
EP
European Patent Office
Prior art keywords
particle size
particles
classification device
fine
fraction
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
EP88306282A
Other versions
EP0298777B1 (en
EP0298777A2 (en
Inventor
Herbert Frank Askew
Stephen Clifford Brown
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.)
Rio Tinto Alcan International Ltd
Original Assignee
Alcan International Ltd Canada
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 Alcan International Ltd Canada filed Critical Alcan International Ltd Canada
Priority to AT88306282T priority Critical patent/ATE77974T1/en
Publication of EP0298777A2 publication Critical patent/EP0298777A2/en
Publication of EP0298777A3 publication Critical patent/EP0298777A3/en
Application granted granted Critical
Publication of EP0298777B1 publication Critical patent/EP0298777B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B02C23/36—Adding fluid, other than for crushing or disintegrating by fluid energy the crushing or disintegrating zone being submerged in liquid
    • 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
    • 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Glanulating (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Disintegrating Or Milling (AREA)
  • Cyclones (AREA)

Abstract

This invention relates to a method of reducing the particle size of solid particles and is applicable to the production of very fine particles of a wide variety of solids, includuing relatively hard solids. The method comprises milling a liquid suspension of solid particles in an agitated media mill (13), pumping the milled suspension through a particle size classification device (16) to separate the slurry into a coarse fraction (17) and a fine fraction (18), the particles of the coarse fraction having a greater median particle size than the particles of the fine fraction, recycling the coarse fraction (17) from the particle size classification device to the input of the mill (13), and recycling the fine fraction (18) by pumping (15) it to the classification device, wherein recycling of both coarse and fine fractions are continued until solid particles of the desired reduced particle size are produced. Preferably a single classification device and a single mill can be used, and particles having a median particle size of 0.3 microns or less and a relatively narrow particle size distribution can be produced, even using a hydrocyclone as the classification device.
EP88306282A 1987-07-09 1988-07-08 Method of producing fine particles Expired - Lifetime EP0298777B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88306282T ATE77974T1 (en) 1987-07-09 1988-07-08 PROCESS FOR THE MANUFACTURE OF FINE PARTICLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8716213 1987-07-09
GB878716213A GB8716213D0 (en) 1987-07-09 1987-07-09 Producing fine particles

Publications (3)

Publication Number Publication Date
EP0298777A2 EP0298777A2 (en) 1989-01-11
EP0298777A3 true EP0298777A3 (en) 1990-02-07
EP0298777B1 EP0298777B1 (en) 1992-07-08

Family

ID=10620393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88306282A Expired - Lifetime EP0298777B1 (en) 1987-07-09 1988-07-08 Method of producing fine particles

Country Status (12)

Country Link
EP (1) EP0298777B1 (en)
JP (1) JPH01104354A (en)
AT (1) ATE77974T1 (en)
AU (1) AU605886B2 (en)
BR (1) BR8803484A (en)
CA (1) CA1323015C (en)
DE (1) DE3872610T2 (en)
GB (1) GB8716213D0 (en)
IE (1) IE61937B1 (en)
IN (1) IN171515B (en)
NO (1) NO174282C (en)
ZA (1) ZA884970B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2579984B2 (en) * 1988-01-28 1997-02-12 株式会社クボタ Method for producing granular material and apparatus for producing the same
US5171631A (en) * 1990-07-19 1992-12-15 Aluminum Company Of America Spacer/extender for titanium dioxide in pigment systems for coatings
ES2311826T3 (en) * 2003-06-17 2009-02-16 Xuning Wang CRUSHING AND GRINDING DEVICE, MACHINE TO MAKE SOY SEED MILK THAT INCLUDES SUCH DEVICE AND A METHOD FOR THE PRODUCTION OF SOY SEED MILK.
JP4703126B2 (en) * 2004-03-29 2011-06-15 太平洋セメント株式会社 Hydrogen storage material manufacturing apparatus and hydrogen storage material manufacturing method
JP5058037B2 (en) * 2008-03-17 2012-10-24 Ｊｆｅスチール株式会社 Method for producing carbon monoxide adsorbent
SG170634A1 (en) * 2009-10-20 2011-05-30 Musse Singapore Pte Ltd An apparatus and method for size reduction
TR201904225A2 (en) 2019-03-21 2019-07-22 Kaleseramik Canakkale Kalebodur Seramik Sanayi Anonim Sirketi A MILLING SYSTEM AND METHOD AND A RELATED CERAMIC PRODUCTION METHOD

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB798100A (en) * 1954-12-17 1958-07-16 Dorr Oliver Inc A method of grinding, utilizing a continuously operating automatically self-regulating wet grinding process
DE1913440A1 (en) * 1968-03-21 1970-01-02 Escher Wyss Ag Method and device for grinding and sifting granular material, in particular cement
US3887142A (en) * 1973-06-21 1975-06-03 Richard E Mcelvain Ore grinding circuit
DE3334235A1 (en) * 1982-11-04 1984-05-10 Heinz 4630 Bochum Jäger Process and apparatus for the energy-saving production of a fine material, especially cement
EP0253635A1 (en) * 1986-07-16 1988-01-20 Alcan International Limited Alumina hydrates

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB798100A (en) * 1954-12-17 1958-07-16 Dorr Oliver Inc A method of grinding, utilizing a continuously operating automatically self-regulating wet grinding process
DE1913440A1 (en) * 1968-03-21 1970-01-02 Escher Wyss Ag Method and device for grinding and sifting granular material, in particular cement
US3887142A (en) * 1973-06-21 1975-06-03 Richard E Mcelvain Ore grinding circuit
DE3334235A1 (en) * 1982-11-04 1984-05-10 Heinz 4630 Bochum Jäger Process and apparatus for the energy-saving production of a fine material, especially cement
EP0253635A1 (en) * 1986-07-16 1988-01-20 Alcan International Limited Alumina hydrates

Also Published As

Publication number Publication date
BR8803484A (en) 1989-01-31
NO883051L (en) 1989-01-10
DE3872610T2 (en) 1993-02-18
GB8716213D0 (en) 1987-08-12
AU605886B2 (en) 1991-01-24
EP0298777B1 (en) 1992-07-08
JPH01104354A (en) 1989-04-21
IN171515B (en) 1992-10-31
EP0298777A2 (en) 1989-01-11
AU1891088A (en) 1989-01-12
DE3872610D1 (en) 1992-08-13
NO174282C (en) 1994-04-13
NO883051D0 (en) 1988-07-08
IE61937B1 (en) 1994-11-30
ATE77974T1 (en) 1992-07-15
NO174282B (en) 1994-01-03
IE882089L (en) 1989-01-09
ZA884970B (en) 1989-03-29
CA1323015C (en) 1993-10-12

Similar Documents

Publication Publication Date Title
IN188944B (en)
IN169936B (en)
US4303204A (en) Upgrading of bauxites, bauxitic clays, and aluminum mineral bearing clays
JPH0711268A (en) Production of deashed high-concentration coal-water slurry
EP0298777A3 (en) Method of producing fine particles
ES2021395B3 (en)
DE3477939D1 (en) Process and installation for preparing coated metallic articles and for obtaining spherical metallic particles
JP2693039B2 (en) Zirconium silicate grinding medium and fine grinding method
FI880113A (en) Method for forming finely divided calcium sulfate
RU1799627C (en) Method for ore magnetic concentration
GB2082554A (en) Upgrading of bauxites, bauxitic clays, and aluminum mineral bearing clays by beneficiation
JPS59154149A (en) Grinding method of solid particles
Kihlstedt Energy and Minerals Beneficiation
WO1989006680A1 (en) A novel and improved method of producing solid-liquid mixtures with a high concentration of solids
JPS6451493A (en) Production of coal-water slurry
Hoyer Removal of Pebbles and Pre-crushing of Selected Feed Material in Autogenous Milling

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 FR GB IT LI NL 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 FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19900306

17Q First examination report despatched

Effective date: 19910506

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 FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 77974

Country of ref document: AT

Date of ref document: 19920715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3872610

Country of ref document: DE

Date of ref document: 19920813

ET Fr: translation filed
ITF It: translation for a ep patent filed
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
EAL Se: european patent in force in sweden

Ref document number: 88306282.0

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

Ref country code: AT

Payment date: 19980623

Year of fee payment: 11

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

Ref country code: CH

Payment date: 19980706

Year of fee payment: 11

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

Ref country code: AT

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

Effective date: 19990708

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

Ref country code: CH

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

Effective date: 19990731

Ref country code: LI

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

Effective date: 19990731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: NL

Payment date: 20050616

Year of fee payment: 18

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

Ref country code: FR

Payment date: 20050718

Year of fee payment: 18

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

Ref country code: SE

Payment date: 20050720

Year of fee payment: 18

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

Ref country code: BE

Payment date: 20050819

Year of fee payment: 18

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

Ref country code: DE

Payment date: 20050831

Year of fee payment: 18

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

Ref country code: SE

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

Effective date: 20060709

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

Ref country code: BE

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

Effective date: 20060731

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

Ref country code: NL

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

Effective date: 20070201

Ref country code: DE

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

Effective date: 20070201

EUG Se: european patent has lapsed
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20070201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070330

BERE Be: lapsed

Owner name: *ALCAN INTERNATIONAL LTD

Effective date: 20060731

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

Ref country code: GB

Payment date: 20070727

Year of fee payment: 20

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

Ref country code: IT

Payment date: 20070730

Year of fee payment: 20

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

Ref country code: FR

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

Effective date: 20060731

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20080707

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 EXPIRATION OF PROTECTION

Effective date: 20080707