EP1669137B1 - Dispositif de concassage de materiaux - Google Patents

Dispositif de concassage de materiaux Download PDF

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Publication number
EP1669137B1
EP1669137B1 EP04734467A EP04734467A EP1669137B1 EP 1669137 B1 EP1669137 B1 EP 1669137B1 EP 04734467 A EP04734467 A EP 04734467A EP 04734467 A EP04734467 A EP 04734467A EP 1669137 B1 EP1669137 B1 EP 1669137B1
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EP
European Patent Office
Prior art keywords
mill chamber
respect
angle
atomizers
ring
Prior art date
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Expired - Lifetime
Application number
EP04734467A
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German (de)
English (en)
Other versions
EP1669137A1 (fr
EP1669137A4 (fr
Inventor
Aleksandr Kurochka
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Individual
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Priority claimed from PCT/UA2004/000032 external-priority patent/WO2005018811A1/fr
Publication of EP1669137A1 publication Critical patent/EP1669137A1/fr
Publication of EP1669137A4 publication Critical patent/EP1669137A4/fr
Application granted granted Critical
Publication of EP1669137B1 publication Critical patent/EP1669137B1/fr
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    • 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
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • 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
    • B02C19/061—Jet mills of the cylindrical type

Definitions

  • a material milling device belongs to the designs of mills and is designed in particular for ultra-fine milling of viscous and other materials.
  • jet mills For ultra-fine milling of materials in various fields of industry jet mills are used as one of the basic types of equipment. There are several types of jet mill constructions, that differ by the form of mill chamber and number and mode of the jet nozzles location. But the principle of their functioning is the same: material to be ground is sped up by jets of an energy carrier and is ground by particle-on-particle impact or collision with a fixed barrier.
  • a counter flow jet mill having a mill chamber, a nozzle for feeding of an energy carrier and a booster pipe, where overheated steam, pressurized air, gas or jet engine exhausted gases are used as energy carriers is known ( Akunov V.I. Jet mills. - M.:Mashgiz, 1962. - p. 111-113 ) . In mills of this type the process of milling is not carried out sufficiently enough.
  • a jet-type mill consisting of a flat type mill chamber limited by upper and lower lids and a multifaceted-shaped sidewall is also known (Certificate of authorship USSR No. 1423156, Cl. B 02C 19/06, 1987).
  • gas flow in the grinding space is generated by peripheral supersonic nozzles that are equally spaced along the perimeter of the sidewall and are inclined with respect to its surface.
  • Peripheral nozzles for gas energy carrier feeding allow the generation of a high speed jet stream near the sidewall of a mill chamber. But milling of the material here occurs in vortex flows in the zone of interaction /intersection/ of blasted streams and has local character.
  • the closest technical solution is a milling device presented as an aerodynamic jet mill designed, in particular, for soft milling of the materials (Patent USSR No. 1582977 ).
  • the device consists of a chamber for grinding to which an injector and manifold are connected.
  • grinded material enters the mill chamber in a form of gas suspension, which limits the speed of the flow fields. Milling here occurs in two phases, jet-type in the injection devices and vortex-type in cylindrical mill chamber. After pre-cutting in the injection devices the material is conveyed to the mill chamber with loss of energy as the delivery of gas suspension through cylindrical channel also limits its speed, which cannot reach sonic or supersonic speed.
  • This construction design is intended for soft milling.
  • the known solution can not ensure an acceleration to a high speed in the known device that leads to a reduction of the soft milling productiveness, including materials of super hard and viscous metals for which soft milling having this construction design is impossible, and more over high productiveness and purity of the materials are not obtained after the milling.
  • Patent document GB 1362373 discloses a mill comprising a cylindrical chamber, a feed injector, a plurality of nozzles, a ring of tangential vanes set at an angle to a diameter of the mill in the opposite sense to the angle of the nozzles, and an exhaust outlet connected to a cyclone through a conduit, wherein a nozzles ring is coated with an abrasion resistant material.
  • Technical result of the proposed device is to obtain viscous and other materials ground to nanoparticles as well as to reach high productiveness and purity of the ground materials.
  • the device inter alia having a cylindrical mill chamber wherein to an exterior surface of the lid thereof an aerodynamic turbine is connected, inside of the mill chamber an aerodynamic classifier is positioned and connected to the lid thereby on the exterior of the aerodynamic classifier vertical holes of definite shape are provided inclined at a definite angle with respect to the air flow. Also inside the mill chamber a coated ring is positioned, thereby the device has at least one pressurized air feeding atomizer which passes into the opening of the nozzle of a definite shape provided on the ring wherein the atomizers are connected to the mill camera casing inclined with respect to the vertical axis and inclined with respect to the cylindrical injector for pressurized air and feed stream.
  • the angle at which atomizers are connected to the mill chamber casing with respect to the vertical axis can be 0° - 90°, likewise the angle at which atomizers are connected to the mill chamber casing with respect to the cylindrical injector can be 0° - 90° and provides for directionality of the high speed feed stream to the cutting part of the coated ring /in case of milling soft, viscous materials/.
  • Change of the feed angle of the accelerating and cutting atomizers provides for the retraction of the high-speed feed stream from the coated ring and convey milling zone to the area between the exterior side of the classifier and the inner side of the coated ring that allows for grinding abrasives and special hard materials /milling as a result of impact/.
  • Feed angle of accelerating and cutting atomizers is set up individually depending on the properties of the ground material.
  • Size of an angle is defined experimentally. It is optimal from the point of view of avoiding the presence of foreign body impurities and more over change of the angle leads to the change in the productiveness.
  • Holes of the ring nozzles can be slot-shaped, which allows a significant increase in the volume of milling in the cutting zone.
  • Holes of the ring nozzles can be round-shaped, which allows a significant increase in speed and directionality in the milling zones.
  • Coating of the ring is done by means of diamond dusting or other technologically acceptable material with cutting properties.
  • Device consists of the mill chamber 1 to which atomizers 2 and injector 3 are connected.
  • Mill chamber 1 is a cylindrical reservoir with lids 4, 5.
  • Atomizer 2 is connected to the chamber casing and passes into the opening 6 of definite shape nozzle on the ring 17.
  • Device has at least one atomizer or more. Atomizers can be distributed in several levels along horizontal axis.
  • Fig. 3 shows a ring with slot-shaped opening of the nozzle.
  • Fig. 4 shows a ring with round opening of the jet nozzle.
  • Injector 3 has a cylindrical form.
  • a manifold 7 is connected, to which an aerodynamic passive turbine is coupled. Aerodynamic passive turbine is made as a cylinder 8 that passes into the cone 9.
  • junction 10 On the sidewall of the cylinder there is a junction 10 with manifold 7, which is the inlet for the air-feed mass and is positioned tangentially to the horizontal axis.
  • spindle 11 Inside of the cylinder 8 there is a spindle 11 that is connected by threaded connection to the exterior of the lid of the cylinder 8 at one end and has cone-shaped form at its other end and by this cone it is directed to the cone part of the turbine casing.
  • the shaft is fixed, on the shaft there is a twelve-vane impeller 12 that is rigidly connected to the shaft.
  • Atomizer 2 is connected to the casing of the mill chamber 1 at an angle of 0° - 90° with respect to the vertical axis and at an angle of 0° - 90° with respect to the injector which makes an angle of pressurized air feed.
  • Device can have several atomizers.
  • Aerodynamic classifier 13 is positioned, which is connected by threaded connection 14 to the lid of the mill chamber 1.
  • Aerodynamic classifier 13 is a cylinder exterior side of which equals to the height of the mill chamber 1, also on the exterior there are vertical holes 15 of definite shape - for example, slot-shaped or round-shaped holes - inclined at specific angle with respect to the airflow. Specific angle can be opposite with respect to the airflow.
  • Lower part of the aerodynamic classifier 13, namely cylinder has a significant thickening in the centre of which there is a threaded opening 16.
  • Inside of the mill chamber 1 there is a ring 17 with coating 18, besides this coating performs cutting function for milling the material.
  • the coating 18 of the ring 17 is done by means of diamond dusting or other technologically acceptable material having cutting properties.
  • the size of the particles is chosen according to the requirements for the grinded material.
  • Fig. 6 shows availability of several atomizers /atomizer is shown under number 2, as well as in other figures/ that are connected to chamber casing and pass into the opening 6 of the definite shape nozzle made on the ring 17. Connection of the nozzle to the casing is shown at fig.7
  • Pressurized air is delivered to the chamber 1 for milling by pressurized air, through injector 3 is accelerated in the mill chamber 1 by means of pressurized air stream blasted into the mill chamber through atomizer 2.
  • feed stream of the material is accelerated due to volume contraction, in which the material is ground in the mill chamber 1 by aerodynamic classifier 13.
  • Centrifugal forces that emerge, direct the particles flux of the material to the ring 17 with coating 18, which is performing the cutting function.
  • Ground particles due to loss of centrifugal forces are taken by the reverse stream of aerodynamic classifier 13 and are conveyed through manifold to the cyclone where the material is separated from air.
  • Aerodynamic turbine takes down back pressure in the mill chamber and increases pressure in the cone part of the turbine which increases centrifugal force of the ground material and as a result particles of the material takes the form of pellets.
  • Material milling device can be used in different fields of industry including mining, civil engineering, chemical industry, metallurgy, agriculture, food industry and provides ultra-thin up to nanosizes milling of viscous and other materials. High productiveness up to several tons per hour is obtained and purity of the materials after milling excludes presence of impurities.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)

Claims (9)

  1. Dispositif de broyage de matériau avec une chambre broyeuse (1) de forme cylindrique, un injecteur (3) pour le matériau à broyer, un collecteur (7) connecté à la chambre (1) à l'extérieur d'un couvercle (5) de celle-ci, un ou plusieurs atomiseurs (2) pour fournir de l'air pressurisé, et un cyclone (8, 9) connecté au collecteur (7) pour diminuer la pression de retour de la chambre broyeuse (1), dans lequel un classificateur aérodynamique (13) est positionné à l'intérieur de la chambre broyeuse (1) et est connecté au couvercle (5), dans lequel il y a, à l'extérieur du classificateur aérodynamique (13), des trous verticaux (15) d'une forme définie prévus à un angle défini par rapport à un flux d'air ;
    dans lequel il y a en outre, à l'intérieur de la chambre broyeuse (1), un anneau (17) avec un revêtement (18), les atomiseurs (2) sont attachés audit anneau et passent dans l'ouverture (6) d'une buse d'une forme définie prévue sur l'anneau (17),
    caractérisé en ce que
    les atomiseurs (2) sont connectés au boîtier de chambre broyeuse à un angle par rapport à un axe vertical et à un angle par rapport à un injecteur cylindrique (3) pour l'alimentation de matériau et d'air pressurisé, et en ce que
    le cyclone est fait comme un cylindre (8) qui passe dans un cône (9), comprenant en outre une jonction (10) avec le collecteur (7) servant comme une entrée et positionnée tangentiellement sur une paroi de flanc du cylindre (8), comprenant en outre un axe (11) connecté, à une extrémité, à l'intérieur du cylindre (8) par une connexion filetée à un extérieur d'un couvercle du cylindre (8), ledit axe (11) ayant une forme de cône à son autre extrémité et étant dirigé par cette partie conique vers le cône (9) du cyclone, et un agitateur à douze pales (12) étant connecté de manière rigide audit axe (11) fixé.
  2. Dispositif selon la revendication 1, caractérisé par le classificateur aérodynamique (13) ayant une forme cylindrique avec la partie inférieure ayant un épaississement (14), dans le centre duquel il y a une ouverture filetée (16).
  3. Dispositif selon l'une des revendications 1 et 2, caractérisé par les trous verticaux (15) sur le classificateur aérodynamique (13) étant en forme de fente et prévus à un angle aigu opposé par rapport au flux d'air.
  4. Dispositif selon l'une des revendications 1 et 2, caractérisé par les trous verticaux (15) sur le classificateur aérodynamique (13) étant de forme ronde et prévus à un angle aigu opposé par rapport au flux d'air.
  5. Dispositif selon la revendication 1, caractérisé en ce que l'angle auquel les atomiseurs (2) sont connectés au boîtier de la chambre broyeuse (1) par rapport à l'axe vertical est de 0° à 90°.
  6. Dispositif selon la revendication 1, caractérisé en ce que l'angle auquel les atomiseurs (2) sont connectés au boîtier de la chambre broyeuse (1) par rapport à l'injecteur cylindrique (3) est de 0° à 90°.
  7. Dispositif selon la revendication 1, caractérisé par des trous de buse à jet en forme de fente (6).
  8. Dispositif selon la revendication 1, caractérisé par des trous de buse à jet de forme ronde (6).
  9. Dispositif selon la revendication 1, caractérisé en ce que le revêtement (18) d'anneau est fait de poussière de diamant ou tous autres matériaux technologiquement acceptables ayant des propriétés de coupe.
EP04734467A 2003-08-26 2004-05-21 Dispositif de concassage de materiaux Expired - Lifetime EP1669137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UA3087985 2003-08-26
PCT/UA2004/000032 WO2005018811A1 (fr) 2003-08-26 2004-05-21 Dispositif de concassage de materiaux

Publications (3)

Publication Number Publication Date
EP1669137A1 EP1669137A1 (fr) 2006-06-14
EP1669137A4 EP1669137A4 (fr) 2006-12-20
EP1669137B1 true EP1669137B1 (fr) 2013-01-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04734467A Expired - Lifetime EP1669137B1 (fr) 2003-08-26 2004-05-21 Dispositif de concassage de materiaux

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EP (1) EP1669137B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019043439A1 (fr) * 2017-09-04 2019-03-07 Nano Coal, Sia Dispositif de broyage de matériau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112892809B (zh) * 2021-02-05 2023-01-24 惠州大唐伟业电子有限公司 一种光学玻璃的超声加工装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019043439A1 (fr) * 2017-09-04 2019-03-07 Nano Coal, Sia Dispositif de broyage de matériau

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Publication number Publication date
EP1669137A1 (fr) 2006-06-14
EP1669137A4 (fr) 2006-12-20

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