WO1987003220A1 - Appareil de production d'un produit trie en fines - Google Patents
Appareil de production d'un produit trie en fines Download PDFInfo
- Publication number
- WO1987003220A1 WO1987003220A1 PCT/FI1986/000141 FI8600141W WO8703220A1 WO 1987003220 A1 WO1987003220 A1 WO 1987003220A1 FI 8600141 W FI8600141 W FI 8600141W WO 8703220 A1 WO8703220 A1 WO 8703220A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crusher
- classifier
- procedure
- air
- product
- Prior art date
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
- B02C23/24—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
-
- 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
-
- 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
Definitions
- the present Invention concerns a procedure for producing classified fines product from material constituted by coarser particles, in said procedure the material being first processed with a rotor crusher, from which the crushed material is transported, carried by an air flow, to a centrifugal classifier, which effects separation of the final fines product.
- the rotor crusher is typically a means comprising a vertical shaft and thereto attached a rotor constituted by a horizontal disperser disk, a shell encircling this laterally, and feeding and output apertures or passages for the crushed material, located above and below the disperser disk.
- the material to be crushed is fed onto the disperser disk, which by centrifugal action flings the material against the encircling shell.
- the shell consists of vertical plates on hitting which the material particles are crushed.
- the shell has been designed to be a housing in which is formed a material bed consisting of particles to be crushed and from which the particles flung out by the disperser disk rebound so that crushing mainly takes place as particles collide in the air.
- the object of the present invention is to devise a new kind of design solution, based on crushing effected with a rotor crusher and on centrifugal classification, for producing a classified fines product, and which is particularly applicable in those cases in which the material consisting of coarser particles and constituting the initial material is moist.
- the Invention is characterized in that the material which is separated in the centrifugal classifier to constitute the coarse fraction is processed with a jet grinder, operating on compressed air, connected in conjunction with the classifier and from which the material is returned to the classifier in more finely ground condition.
- the jet grinder is a means in which the material to be ground is mixed with hot compressed air, which is divided into flows which, after being accelerated, are made to collide with each other. Grinding will then take place in the collisions between material particles carried by said flows.
- the advantages of using a jet grinder as a component part in a process comprising crushing and classification is based on the fact that the grinder produces warm exhaust air which can be employed towards drying the moist material that is being processed in the crusher. If such moist material were processed in apparatus of prior art, comprising a rotor crusher and a classifying space provided in its conjunction, it would be necessary to arrange for separate drying of the material.
- the manufacturing of a finely divided product meant to be used like cement or another equivalent bonding agent from water-granulated, calciferous blast furnace slag.
- the slag constitutes the moist material being supplied to the rotor crusher, this material being dried with the warm exhaust air conducted from the jet grinder to the crusher.
- the invention further concerns an apparatus for producing classified fines product from material constituted by coarser particles, by the procedure above described.
- the apparatus comprises, as elements known in themselves in the art, a rotor crusher and a centrifugal classifier connected thereto through a passage and into which the crushed material has been arranged to go along with the air flow, and which performs the final fines product separation with the aid of centrifugal force.
- the apparatus of the invention is characterized in that it comprises, in addition, a jet grinder operating on compressed air and connected in conjunction with the centrifugal classifier and arranged to comminute the material that is being separated as coarse fraction in the classifier, for repeated classifying treatment.
- Fig. 1 presents an apparatus according to the invention for producing classified fines product, comprising a rotor crusher, a pneumatic centrifugal classifier and a jet grinder, and
- Fig. 2 presents, as indicated by arrows II-II in Fig. 1, part of the jet grinder.
- Supply of the material to be processed in the apparatus is through the passage 6 onto the rotating disperser disk 4 of the crusher 1, the disperser disk flinging the material particles against the encircling shell 3.
- a material bed 7 consisting of particles to be crushed builds up on the shell 5 and from which the particles flung out by the disperser disk 4 rebound, to begin with obliquely upward, and thereafter downward conforming to the surface of said bed and shell in such manner that crushing of the material takes place meinly as the particles collide in air.
- the material which remains coarser in the crusher 1 descends under gravity effect to the recycling passage 8, starting at the lower end of the crusher, this passage recycling it to the crusher for another crushing treatment.
- the more finely divided material produced by the crusher ascends with the air flow, upward to the passage 9 starting above the disperser disk 4 of the rotor, this passage leading to the centrifugal classifier 10.
- the task of the pneumatic centrifugal classifier 10 comprised in the apparatus is to divide the solids that have been conducted into it, into a classified fines product consisting of the most finely divided particles and a coarse fraction consisting of coarser particles.
- the classifier 10 comprises a substantially cylindrical classifying space 11 with horizontal axis, with which said passage 9 connects tangentially. Moreover, with the classifying space 11 connects tangentially a passage 13 provided with a blower 12, through this passage being blown into said space an air flow generating and maintaining a centrifugal field.
- the air, and the solids conducted into the classifier are thereby set in rotary motion within the classifying space 11, where the fines product becomes separated to reside in the centre of the classifying space and the coarse fraction, on its margin.
- the fines product is removed to an exit aperture 14 located roughly on the horizontal central axis of the classifying space 11, this aperture leading to the fines product cyclone 13, whence the air accompanying the fines product returns through the passage 16 and blower 12 to the classifying space 11, to be reused as classifying fluid.
- the coarse fraction departs to the exit aperture 17 in the lower part of the classifying space 11, which leads to the coarse product cyclone 18.
- the extra air is removed from the classifier 10 to the passage 19.
- the coarse fraction accumulating in the coarse product cyclone 18 is processed, as taught by the invention, with a jet grinder 20 connected in conjunction with the classifier.
- the coarse fraction goes further from the coarse product cyclone 18 through the passage 21 to a feed chamber 23, provided with screw conveyor 22, whence it goes, pushed by the screw conveyor, into a mixing space 24, into which is conducted hot compressed air through the passage 25.
- the pressure of the compressed air that is used may be, for instance, 16 bar and its temperature about 350oC.
- the particles of the coarse fraction are mixed with the compressed air and go along therewith, with high velocity, into two curved passages 26, tapering down at their ends, (Fig. 2) the ends 27 of which are placed against each other so that the flows conducted through the passages collide.
- the material particles carried by the flows break up on impact so that grinding of the material is the end result.
- the ground material, and the air goes thereafter through the passage 28 to the filter 29, where they are separated.
- the ground material is fed from the filter 29 through the passage 30, tangential ly into the classifying space 11 of the centrifugal classifier 10, for repeated classifying treatment.
- the escaping air which has a temperature still higher than 100oC, goes from the filter 29 to the blower 31, which blows it through the passage 32 into the recycling passage of the rotor crusher 1, to serve as recycling fluid and as drying agent for the material supplied to the crusher through the passage 6.
- the apparatus just described may be used e.g. to comminute granulated blast furnace slag to become a finely divided, cement-like product.
- the granulated moist slag which has particle size in the range fron 0 to 50 mm and moisture content about 10%, is fed into the rotor crusher 1, which dries.it with the aid of the exhaust air derived from the jet grinder 20 and comminutes it to particle size 0-2 mm.
- the slag that has been comminuted in this way goes along with the air flow to the centrifugal classifier 10, which separates particles smaller than the separation limit of 20 urn to form the fines product in the cyclone 15.
- Air containing the moisture which was present in the slag, is removed from the apparatus, at a rate equivalent to the input of air into the apparatus, to the passage 19.
- the apparatus produces, from slag, completely dry, finely divided end product which has particle size in the range from 0 to 20 ⁇ m.
Abstract
Procédé et appareil de production d'un produit trié en fines à partir d'un matériau constitué de particules plus épaisses. Selon la présente invention, ledit matériau est d'abord traité par un broyeur à rotor (1) et ensuite transporté, au moyen d'un courant d'air, vers un trieur centrifuge (10), qui effectue la séparation du produit final en fines. Il est essentiel pour la présente invention que le matériau se séparant en fractions grossières dans le trieur centrifuge (10) soit traité dans un broyeur (20) à jet fonctionnant à l'air comprimé, le matériau ainsi obtenu étant renvoyé vers le trieur dans un état de broyage plus fin. Lorsque la présente invention s'applique au broyage fin de matériau humide, l'air d'évacuation chaud provenant du broyeur (20) à jet peut être conduit vers le broyeur à rotor (1), afin d'être utilisé comme air de séchage pour ledit matériau.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI854735 | 1985-11-29 | ||
FI854735A FI74890C (fi) | 1985-11-29 | 1985-11-29 | Foerfarande och anordning foer framstaellning av en klassificerad fraktion av finfoerdelat material. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1987003220A1 true WO1987003220A1 (fr) | 1987-06-04 |
Family
ID=8521772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1986/000141 WO1987003220A1 (fr) | 1985-11-29 | 1986-12-01 | Appareil de production d'un produit trie en fines |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU6727187A (fr) |
FI (1) | FI74890C (fr) |
WO (1) | WO1987003220A1 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990006179A1 (fr) * | 1988-11-28 | 1990-06-14 | Oy Finnpulva Ab | Procede et equipement de traitement de matiere finement divisee |
WO1993008916A1 (fr) * | 1991-11-06 | 1993-05-13 | Oy Finnpulva Ab | Procede de broyage d'un materiau finement divise |
AT398173B (de) * | 1990-01-16 | 1994-10-25 | Schmidt Ernst Dipl Ing | Verfahren zum mahlen von feststoffen |
WO1999067182A1 (fr) * | 1998-06-24 | 1999-12-29 | 'holderbank' Financiere Glarus Ag | Procede de fragmentation et de reduction de scories contenant un oxyde metallique |
WO2009048592A1 (fr) * | 2007-10-09 | 2009-04-16 | Cbp Carbon Industries, Inc. | Dispositif pour classifier des particules dans un résidu charbonneux pyrolysé |
US8394189B2 (en) | 2007-11-07 | 2013-03-12 | John H. Fader | Asphalt composition using pyrolysed carbonaceous material |
WO2016126961A1 (fr) * | 2015-02-06 | 2016-08-11 | Edw. C. Levy Co. | Système de classification à air centrifuge et son procédé d'utilisation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114798149B (zh) * | 2022-05-06 | 2023-07-21 | 太原理工大学 | 含炭煤灰渣分选残炭的方法以及气流分选系统 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2023247A (en) * | 1932-12-29 | 1935-12-03 | Raymond Brothers Impact Pulver | Mill-drying process and apparatus |
GB708491A (en) * | 1951-06-22 | 1954-05-05 | Titan Co Inc | Improvements in the production of finely divided materials |
US3289950A (en) * | 1962-12-12 | 1966-12-06 | Polysius Gmbh | Method of and apparatus for grinding moist material |
US3937405A (en) * | 1973-12-18 | 1976-02-10 | Fluid Energy Processing And Equipment Company | Apparatus for mixing pulverizing and grinding black powder |
US4131239A (en) * | 1977-06-13 | 1978-12-26 | Energy Processing And Equipment Co. | Fluid energy mill for large particulate materials |
US4582264A (en) * | 1984-03-05 | 1986-04-15 | Stephanoff Nicholas N | Jet-type grinding systems for large particles |
-
1985
- 1985-11-29 FI FI854735A patent/FI74890C/fi not_active IP Right Cessation
-
1986
- 1986-12-01 AU AU67271/87A patent/AU6727187A/en not_active Abandoned
- 1986-12-01 WO PCT/FI1986/000141 patent/WO1987003220A1/fr unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2023247A (en) * | 1932-12-29 | 1935-12-03 | Raymond Brothers Impact Pulver | Mill-drying process and apparatus |
GB708491A (en) * | 1951-06-22 | 1954-05-05 | Titan Co Inc | Improvements in the production of finely divided materials |
US3289950A (en) * | 1962-12-12 | 1966-12-06 | Polysius Gmbh | Method of and apparatus for grinding moist material |
US3937405A (en) * | 1973-12-18 | 1976-02-10 | Fluid Energy Processing And Equipment Company | Apparatus for mixing pulverizing and grinding black powder |
US4131239A (en) * | 1977-06-13 | 1978-12-26 | Energy Processing And Equipment Co. | Fluid energy mill for large particulate materials |
US4582264A (en) * | 1984-03-05 | 1986-04-15 | Stephanoff Nicholas N | Jet-type grinding systems for large particles |
Non-Patent Citations (1)
Title |
---|
DERWENT'S ABSTRACT, No. D837/17; & SU,A,682267. * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990006179A1 (fr) * | 1988-11-28 | 1990-06-14 | Oy Finnpulva Ab | Procede et equipement de traitement de matiere finement divisee |
AU622742B2 (en) * | 1988-11-28 | 1992-04-16 | Oy Finnpulva Ab | Method and equipment for processing of particularly finely divided material |
AT398173B (de) * | 1990-01-16 | 1994-10-25 | Schmidt Ernst Dipl Ing | Verfahren zum mahlen von feststoffen |
WO1993008916A1 (fr) * | 1991-11-06 | 1993-05-13 | Oy Finnpulva Ab | Procede de broyage d'un materiau finement divise |
WO1999067182A1 (fr) * | 1998-06-24 | 1999-12-29 | 'holderbank' Financiere Glarus Ag | Procede de fragmentation et de reduction de scories contenant un oxyde metallique |
WO2009048592A1 (fr) * | 2007-10-09 | 2009-04-16 | Cbp Carbon Industries, Inc. | Dispositif pour classifier des particules dans un résidu charbonneux pyrolysé |
US8247527B2 (en) | 2007-10-09 | 2012-08-21 | Cbp Carbon Industries, Inc. | Enhanced fine agglomerate mixture |
US8322642B2 (en) | 2007-10-09 | 2012-12-04 | Fader John H | Arrangement for classifying particles in a pyrolysed char |
US8394189B2 (en) | 2007-11-07 | 2013-03-12 | John H. Fader | Asphalt composition using pyrolysed carbonaceous material |
WO2016126961A1 (fr) * | 2015-02-06 | 2016-08-11 | Edw. C. Levy Co. | Système de classification à air centrifuge et son procédé d'utilisation |
Also Published As
Publication number | Publication date |
---|---|
FI74890C (fi) | 1988-04-11 |
AU6727187A (en) | 1987-07-01 |
FI854735A0 (fi) | 1985-11-29 |
FI854735A (fi) | 1987-05-30 |
FI74890B (fi) | 1987-12-31 |
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