GB958484A - Method and apparatus for impact pulverisation-classification - Google Patents

Method and apparatus for impact pulverisation-classification

Info

Publication number
GB958484A
GB958484A GB16306/63A GB1630663A GB958484A GB 958484 A GB958484 A GB 958484A GB 16306/63 A GB16306/63 A GB 16306/63A GB 1630663 A GB1630663 A GB 1630663A GB 958484 A GB958484 A GB 958484A
Authority
GB
United Kingdom
Prior art keywords
chamber
solids
mill
carrier gas
classification
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.)
Expired
Application number
GB16306/63A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB958484A publication Critical patent/GB958484A/en
Expired 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
    • 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
    • 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
    • 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
    • B02C13/1814—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 on top of a disc type rotor
    • 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
    • B02C13/22—Disintegrating by mills having rotary beater elements ; Hammer mills with intermeshing pins ; Pin Disk Mills
    • B02C13/24—Disintegrating by mills having rotary beater elements ; Hammer mills with intermeshing pins ; Pin Disk Mills arranged around a vertical axis
    • 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
    • B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
    • 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
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Abstract

958,484. Impact pulverizers; centrifugal separators. E. I. DU PONT DE NEMOURS & CO. April 25, 1963 [April 27, 1962], No. 16306/63. Headings B2A and B2P. Apparatus for pulverizing and classifying solids comprises a centrifugal impact mill, means for introducing solids to be pulverized together with carrier gas radially of the mill, a closed generally circular cross-section chamber in open communication with the pulverized product delivery side of the mill, the chamber being provided with a centrally disposed port for the withdrawal of fine pulverized solids entrained in carrier gas exiting from the mill and a plurality of gas inlet ports disposed in the peripheral wall of the chamber for introducing additional carrier gas into the chamber thereby to maintain a vortical flow of carrier gas within the chamber for effecting a particle size classification of pulverized solids delivered by the mill and dispersed in the carrier gas. The apparatus shown in Figs. 1 and 2 comprise a mill having an inlet 40 for solids to be pulverized and a rotary disc 45 provided with radial vanes 47 for drawing in air through port 40 as well as through recycling ducts 39, and louvres 55 arranged around the entire circumference, at intervals from 5 to 15 degrees, of a receiver 38 for supplying additional air, preferably between 0À1 and 0.9 sonic velocity, tangentially to a classifier chamber 57, the receiver having air supplied thereto from a duct 34, Fig. 1, by means of a fan 32 and duct 35. The chamber 57 is provided with plates 60, 62 rotatable with the disc 45. The periphery of plate 62 is provided with vanes 64 for ejecting coarse solids from the pulverizer and from the classifier through a trough 65 to the ducts 39. The fine fraction resulting from the classification is concentrated of the vortical flow of the classification air and is withdrawn from chamber 57 by a fan 31 which delivers it to a volute casing 36. A trough for removing coarse solids from the pulverizer may be provided between trough 65 and the anvil face 50 of the pulverizer. Also, the plate 62 may be stationary or the plates 60, 62 may be driven from the shaft of motor 30. Further, one or more of the ducts 39 may be used for feeding solids. In a modification, Fig. 3, the louvres 55 may be replaced by nozzles 77 for supplying steam, at or above sonic velocity, into classification chamber 78, the nozzles being cylindrical or of converging-diverging type and in the latter case dimensions are given. The steam effects additional grinding so that recycling is not necessary. It is stated that the louvres 55 and nozzles 77 may be used in conjunction with each other and that the same mill may be used interchangeably with the classifier of Figs. 1 and 2 or that of Fig. 3. Specification 844,148 and U.S.A. Specification 2,694,492 are referred to.
GB16306/63A 1962-04-27 1963-04-25 Method and apparatus for impact pulverisation-classification Expired GB958484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US190761A US3224686A (en) 1962-04-27 1962-04-27 Impact pulverization-classification

Publications (1)

Publication Number Publication Date
GB958484A true GB958484A (en) 1964-05-21

Family

ID=22702652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16306/63A Expired GB958484A (en) 1962-04-27 1963-04-25 Method and apparatus for impact pulverisation-classification

Country Status (6)

Country Link
US (1) US3224686A (en)
BE (1) BE631610A (en)
CH (1) CH400733A (en)
DE (1) DE1291604B (en)
FR (1) FR1355213A (en)
GB (1) GB958484A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120112A (en) * 1979-07-02 1983-11-30 United States Gypsum Co Apparatus for treating calcined gypsum
GB2253361A (en) * 1991-02-15 1992-09-09 Ronald Frederick Bourne Treatment of particulate material - milling, classifying

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1467437A1 (en) * 1965-03-08 1968-12-19 Degussa Process for the production of silicic acids suitable for matting and varnishing and plastic masses
US3468489A (en) * 1965-10-22 1969-09-23 Norwood H Andrews Comminuting apparatus
US3528915A (en) * 1969-02-28 1970-09-15 Titan Products Co Titaniferous biotite lubricant
US3599880A (en) * 1969-03-24 1971-08-17 Du Pont Lead-chromate-based pigment
DE9005091U1 (en) * 1990-05-04 1990-07-12 F.B. Lehmann Maschinenfabrik Gmbh, 7080 Aalen, De
US5690284A (en) * 1991-01-09 1997-11-25 Qed International Limited Method and apparatus for grinding
WO2004067468A1 (en) * 2003-01-29 2004-08-12 John Hugo Nellmapius Increased repla cement of fly ash in cement compositions

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB196487A (en) * 1900-01-01
US654294A (en) * 1900-01-02 1900-07-24 Farben Fabriken Of Elberfeld Company Blue anthraquinone dye and method of making same.
US1159122A (en) * 1912-05-09 1915-11-02 Charles J Reilly Pulverizing and separating machine.
DE619750C (en) * 1932-08-07 1935-10-05 Kohlenscheidungs Ges M B H Grinding plant
US2092307A (en) * 1935-06-20 1937-09-07 Peabody Engineering Corp Pulverizer
FR988011A (en) * 1942-09-07 1951-08-22 Internat Pulverizing Corp Improvements made to grinding or pulverizing devices
DE941585C (en) * 1943-07-04 1956-04-12 Arno Andreas Impact mill with a high-speed rotor serving for centrifugation
US2342255A (en) * 1943-08-30 1944-02-22 Lawrence N Doyle Pulverizer
DE863284C (en) * 1948-12-28 1953-01-15 Alpine Aktien Ges Eisengiesser Grinding classifier
DE846503C (en) * 1950-02-08 1952-08-14 Kosmos Ges Fuer Internationale Impact mill with impact ring and vertical shaft for different types of grist
DE954473C (en) * 1952-08-16 1956-12-20 Basf Ag Grinding device
US2963230A (en) * 1954-06-30 1960-12-06 Microcyclomat Co Dry material pulverizer with integral classifier
CH349475A (en) * 1955-02-14 1960-10-15 Lecher Joseph Crushing device for reducing the grain size of particles made of solid material
US3023973A (en) * 1959-03-17 1962-03-06 Entoleter Centrifugal impacting apparatus
US3015391A (en) * 1960-02-24 1962-01-02 Sharples Corp Classification process and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120112A (en) * 1979-07-02 1983-11-30 United States Gypsum Co Apparatus for treating calcined gypsum
GB2253361A (en) * 1991-02-15 1992-09-09 Ronald Frederick Bourne Treatment of particulate material - milling, classifying
GB2253361B (en) * 1991-02-15 1995-01-04 Ronald Frederick Bourne Treatment of particulate material by use of a mill, classifier or grinder unit
US5419499A (en) * 1991-02-15 1995-05-30 Bourne; Ronald F. Treatment of particulate material

Also Published As

Publication number Publication date
FR1355213A (en) 1964-03-13
US3224686A (en) 1965-12-21
CH400733A (en) 1965-10-15
DE1291604B (en) 1969-03-27
BE631610A (en)

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