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EP0211117A3 - Method and apparatus for providing finely divided powder - Google Patents

Method and apparatus for providing finely divided powder Download PDF

Info

Publication number
EP0211117A3
EP0211117A3 EP85305506A EP85305506A EP0211117A3 EP 0211117 A3 EP0211117 A3 EP 0211117A3 EP 85305506 A EP85305506 A EP 85305506A EP 85305506 A EP85305506 A EP 85305506A EP 0211117 A3 EP0211117 A3 EP 0211117A3
Authority
EP
European Patent Office
Prior art keywords
classifier
feedstock
pulverizer
gas
pressure
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.)
Withdrawn
Application number
EP85305506A
Other languages
German (de)
French (fr)
Other versions
EP0211117A2 (en
Inventor
Richard M Dunbar
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.)
RMD Industries Inc
Original Assignee
RMD Industries Inc
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
Priority to US06/510,089 priority Critical patent/US4538764A/en
Application filed by RMD Industries Inc filed Critical RMD Industries Inc
Priority to EP85305506A priority patent/EP0211117A3/en
Publication of EP0211117A2 publication Critical patent/EP0211117A2/en
Publication of EP0211117A3 publication Critical patent/EP0211117A3/en
Withdrawn legal-status Critical Current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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/06—Jet mills
    • B02C19/065—Jet mills of the opposed-jet type

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

A no-moving parts pulverizer (19) and classifier system (15) reduces materials to one hundred fifty microns to less than ten microns using superheated steam or any gas capable of being compressed and expanded thru machined orifices. The resultant size reduction depends upon the classifier gas rate and pressure, the pulverizer gas rate and its pressure. These combinations control and regulate miximum particle size, average particle size and the mix of gas and solids in process.
The feedstock enters the classifier chamber (15) by auger (12) or similar manner as long as the feeder maintains a positive seal. The classifier chamber (15) separates the feedstock by size and particles of a predetermined size exit (32) the system in a specific ratio of gas and solids. The feedstock larger than specified exit the base of the classifier (15), split into two equal streams (20A, 20B) and accelerate thru the pulverizer (19). The reduced feedstock exits (13) the pulverizer (19), mixes with incocming feedstock (10) and again enters the classifier (15).
The system is controlled using pressure, temperature, feedrate or any combination of the three. Other control methods can be used if any one of the three are part of the control circuit.
EP85305506A 1983-06-30 1985-08-02 Method and apparatus for providing finely divided powder Withdrawn EP0211117A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/510,089 US4538764A (en) 1983-06-30 1983-06-30 Method and apparatus for providing finely divided powder
EP85305506A EP0211117A3 (en) 1985-08-02 1985-08-02 Method and apparatus for providing finely divided powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85305506A EP0211117A3 (en) 1985-08-02 1985-08-02 Method and apparatus for providing finely divided powder

Publications (2)

Publication Number Publication Date
EP0211117A2 EP0211117A2 (en) 1987-02-25
EP0211117A3 true EP0211117A3 (en) 1988-02-03

Family

ID=8194308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305506A Withdrawn EP0211117A3 (en) 1983-06-30 1985-08-02 Method and apparatus for providing finely divided powder

Country Status (1)

Country Link
EP (1) EP0211117A3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943733C2 (en) * 1989-05-12 1999-01-21 Canon Kk Air separator classifying powders
DE4431534B4 (en) * 1994-02-10 2006-12-28 Nied, Roland, Dr. Ing. Machine for acting on comminuted and classifiable raw material, as well as method for operating the machine
DE102006017472A1 (en) 2006-04-13 2007-10-18 Nied, Roland, Dr. Ing. Method for producing finest particles by means of a jet mill
DE102006023193A1 (en) 2006-05-17 2007-11-22 Nied, Roland, Dr.-Ing. Method for producing finest particles by means of a jet mill
TW200940619A (en) 2007-10-09 2009-10-01 Cbp Carbon Ind Inc Elastomer composition with reclaimed filler materials
US8394189B2 (en) 2007-11-07 2013-03-12 John H. Fader Asphalt composition using pyrolysed carbonaceous material
RU2403097C1 (en) * 2009-06-09 2010-11-10 Закрытое акционерное общество "НИИЦемент" Method of dry enrichment of metal and non-metal minerals and counterflow jet mill (versions)
CN117816325B (en) * 2024-01-26 2024-07-02 青岛新天和碳材料有限公司 High-energy jet mill for natural graphite

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624516A (en) * 1949-01-04 1953-01-06 Blaw Knox Co Fluid impact pulverizer and separator
US2636688A (en) * 1948-02-20 1953-04-28 Inst Gas Technology Method for treating coal and the like
US3186648A (en) * 1963-05-27 1965-06-01 Grace W R & Co Fluid energy mill
US3885931A (en) * 1972-06-12 1975-05-27 Donaldson Co Inc Vortex forming apparatus and method
US4019688A (en) * 1975-06-02 1977-04-26 Viktor Ivanovich Akunov Device for treating loose materials
US4538764A (en) * 1983-06-30 1985-09-03 Dunbar Richard M Method and apparatus for providing finely divided powder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636688A (en) * 1948-02-20 1953-04-28 Inst Gas Technology Method for treating coal and the like
US2624516A (en) * 1949-01-04 1953-01-06 Blaw Knox Co Fluid impact pulverizer and separator
US3186648A (en) * 1963-05-27 1965-06-01 Grace W R & Co Fluid energy mill
US3885931A (en) * 1972-06-12 1975-05-27 Donaldson Co Inc Vortex forming apparatus and method
US4019688A (en) * 1975-06-02 1977-04-26 Viktor Ivanovich Akunov Device for treating loose materials
US4538764A (en) * 1983-06-30 1985-09-03 Dunbar Richard M Method and apparatus for providing finely divided powder

Also Published As

Publication number Publication date
EP0211117A2 (en) 1987-02-25

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Inventor name: DUNBAR, RICHARD M