EP3603811B1 - Zerkleinerungsverfahren und -anlage - Google Patents

Zerkleinerungsverfahren und -anlage Download PDF

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Publication number
EP3603811B1
EP3603811B1 EP19189504.4A EP19189504A EP3603811B1 EP 3603811 B1 EP3603811 B1 EP 3603811B1 EP 19189504 A EP19189504 A EP 19189504A EP 3603811 B1 EP3603811 B1 EP 3603811B1
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EP
European Patent Office
Prior art keywords
crushing
rotors
housing
zone
aerodynamic
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.)
Active
Application number
EP19189504.4A
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German (de)
English (en)
French (fr)
Other versions
EP3603811A1 (de
Inventor
Elena Vladimirovna Artemieva
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.)
Finegri Uab
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Finegri Uab
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Application filed by Finegri Uab filed Critical Finegri Uab
Priority to EP22201926.7A priority Critical patent/EP4186596A1/de
Publication of EP3603811A1 publication Critical patent/EP3603811A1/de
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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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
    • 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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/06—Jet mills

Definitions

  • the invention relates to the field of fine comminution of solid materials, which can be of different origin and composition and of different degrees of strength.
  • it can be used for the processing of all kinds of minerals and solid fossil raw materials in the construction, mining, smelting, chemical and other industries, as well as in the production of high-quality cements, concentrated feed, flour and finely ground multi-component mixtures of minerals and powders be used.
  • the invention is realized in the form of a new method and a special device in which the method is implemented.
  • the material flows become one Subjected to centrifugal force and the more or less coarse or fine particles of the material flow hit on their way to the periphery of the rotors crushing elements that are mounted in a ring on the counter-rotating rotors.
  • the material flows between the collisions with the shredding elements are accelerated on their way to the periphery of the rotors.
  • the cross-section (circumferential contour) of the channels between the crushing elements has a closed shape, ie the channel sections rotating with the counter-rotating rotors have walls (are covered) on all sides.
  • the comminution takes place essentially due to the impacts that act on the material to be comminuted on its way to the periphery of the rotors when it hits the comminution elements.
  • the comminuted material is discharged from the individual channels between the comminution elements of the outermost ring directly into the housing of the comminution device and discharged from the housing via an outlet opening.
  • a crusher comprising the following components: a housing with an axial inlet and a tangential outlet opening and a substantially cylindrical annular crushing chamber; in the latter two rotors arranged horizontally and coaxially are mounted; these rotors can rotate in counter-rotation and are provided on the inside, ie on the rotor surface facing the respective other rotor, with annularly arranged crushing elements, between which run channel sections which ensure the centrifugal effect; the channels running between the crushing elements of the rotors have a cross-section with a closed contour.
  • figure 1 the vertical partial section represented by an overall view of a comminution device according to the invention, and in figure 2 a section in the plane AA according to figure 1 shown.
  • the comminution method disclosed herein in which two different comminution principles are combined in one system or device, serves to solve the above-mentioned task.
  • the material to be crushed is first - essentially as in the prior art - in the form of a two-phase medium (mixture of the material and gas; suspension of the material in a gas phase) in partial flows through radial channels of two counter-rotating grinding elements (rotors) from the axis of the shredder away to its periphery.
  • the respective material flow collides one after the other with shredding elements that are mounted on the counter-rotating rotors.
  • the material flows are accelerated in the radial direction in the channels on the rotors.
  • the channel cross-section (the channel wall) has the shape of a closed contour.
  • the comminution occurs not only through numerous collisions between the material streams accelerated in the centrifugal direction and comminution elements, but also through multiple collisions between the particles of the gas and material mixture in an outermost annular zone of the rotors, into which the various material streams emerge from the channels , in particular in aerodynamic vortices, which are amplified in the peripheral area of the rotors by additional cavities (blind holes, blind holes) provided in the peripheral zone of the rotors.
  • the comminution process presented makes it possible to combine two different comminution methods, to gradually change and adapt different particle comminution and fracture methods and to combine them in one system.
  • the change in the crushing process is done by changing the shape of the crushing elements and changing from the aerodynamic method to the mechanical one and vice versa. Accordingly, two different shredding techniques are used in one and the same plant.
  • the material to be shredded can be fed in various ways: either in the free flow of material, optionally supported by suction of the material through the inlet opening by generating negative pressure in the housing, or forced by feeding devices of various types (feed conveyors).
  • the material to be shredded is accelerated from the rotor axis to the periphery by centrifugal forces as the rotors rotate.
  • the first comminution stage takes place in the ring area of the system disclosed here, which is located near the vertical axis of the rotors or the axial inlet opening. In this area, the particles break brittle as they collide with the crushing elements moving in opposite directions on circular paths.
  • Impingement plates of various sizes and configurations are mounted on ring inserts on the facing surfaces of the upper and lower rotors.
  • the state energy (potential energy) of the elastic deformation (solid fracture mechanics) is converted into thermal energy during shredding inside the shredder housing. Accordingly, there is the possibility of not only shredding the material, but also drying it at the same time (if it is too damp).
  • the crusher using this technique it means that the ring areas can be combined in blocks and that the number of these blocks can be increased or decreased with different crushing methods.
  • a device comprising the following components: a housing with an axial inlet opening, a tangential outlet opening and an annular, substantially cylindrical grinding chamber.
  • a housing with an axial inlet opening, a tangential outlet opening and an annular, substantially cylindrical grinding chamber.
  • two horizontally and coaxially arranged rotors are mounted.
  • the rotors can rotate in opposite directions and are internally, on the sides facing each other, provided with crushing elements arranged in a ring, mounted obliquely to the rotor body and between which there are channels with a cross-section of closed shape.
  • the outer, channel-free ring areas of the rotors also have cavities (depressions, blind or blind holes) that form an additional comminution zone.
  • the additional comminution elements can also be conical and, for example, narrow in the direction of their free opening.
  • the additional crushing elements are thin plates, usually made of high-strength and non-brittle ceramic materials. Depending on the strength of the material to be crushed, their shape and configuration can be different.
  • Additional grinding elements are located within the grinder housing, between the inner wall of the housing (the grinding chamber) and the rims of the rotors. These are variable shape impact plates. When the material jet impacts, the angle of inclination of these impact plates changes. This creates an aerodynamic disruptive effect on the material and creates an additional comminution zone.
  • Air extraction devices are advantageously also attached to the housing of the shredder.
  • the concentration of the material to be shredded in the two-phase medium in the housing can be changed by the more or less intensive removal of air from the surface (outside) of the rotors. This enables a more efficient Crushing in the additional ring zone between the inner wall of the housing and the edges of the rotors.
  • the comminution unit consists of a housing 1 with an axial inlet opening 2, a diffuser (spun spreader G) mounted underneath and a tangential outlet opening 3, and an annular housing section defining a comminution chamber 4 in which horizontally arranged and counter-rotating rotating rotors 5 and 6 are accommodated, on the mutually facing rotor surfaces of which crushing elements 8, 9, 10, 16 and 17 are mounted in annular rows.
  • the rotors 5 and 6 have a common drive (which is not shown on the figure).
  • Channels run between the crushing elements 8, 9, 10, 16 and 17, the cross-section of which narrows in the radial direction from the axis to the periphery of the crushing chamber 4 by reducing the channel height.
  • An annular series of paddles 7 closest to the axis of the rotors 5 and 6 and channels 17 between these paddles belong to the acceleration zone of the material to be crushed.
  • the upper and lower sides of the channels are formed by faces of the respective rotor and faces of a respective associated concentric ring 11, 12, 13, 14, 15 and 18, each row of paddles 7 and crushing elements 8, 9, 10 and 16, 17 covered.
  • the rings 11, 12, 13, 14, 15, 18 are connected to the respective crushing elements 8, 9, 10 and 16, 17 firmly and without play and rotate together with them during operation of the system.
  • the rings 11 to 18 can be detachably mounted or can be manufactured as an integral part of the rotors 5 and 6. They can also be manufactured as a continuous or segmented ring. Each set of segments covers a single channel between the paddles 7 and crushing elements. The side surfaces of the channels are from the front of each paddle 7 or Crushing element 8, 9, 10, 16, 17 and the back of the adjacent paddle or crushing element formed.
  • crushing elements in the form of conical depressions (cavities, blind holes) 21, 22 on the mutually facing surfaces edge surfaces of the rotors 5 and 6.
  • impact plates of variable shape are mounted on the inner wall of the crushing chamber body.
  • the angle of inclination of these impact plates 23, 24, 25 to the inner wall of the crushing chamber can also be changed.
  • the crushing device works as follows: The feed of the starting material of a starting grain size is carried out by free material flow or suction by a negative pressure in the housing via the inlet opening or by feeding devices of various types (feed conveyor).
  • the material is fed into the acceleration zone of the upper rotor 5 of the crusher, where during rotation its particles move along the surface of acceleration paddles 7 in the radial direction. Once the particles have reached their maximum speed, they also have a certain take-off speed and take-off angle and a free flight path (trajectory) into the brittle fracture zone (Zone A). In this zone, the particles collide with the comminution elements 8 running towards them, resulting in brittle fracture. The particle mass then consists of individual fragments whose microhardness exceeds that of the initial particles.
  • the fragments are accelerated along the comminution element 8 in this zone by rotating the rotor. Once the required speed is reached, they collide with the crushing elements 9 of the next rotor element, whereby the material surface is again increased.
  • the particles then move in a radial direction into the zone where the force acts on the entire particle surface (zone B).
  • This zone no longer contains crushing elements, but contains a number of aerodynamic devices in the form of cavities (depressions, blind holes) 21, 22.
  • the crushing method is changed in these.
  • the particles of the already partially crushed material from the various channels collide at high speed and high frequency in the outer annular gap between the counter-rotating rotors. This happens through an aerodynamic interference effect and the resulting aerodynamic vortices.
  • the size, mass and specific surface area of the particles now differ significantly from the characteristics of the starting material in Zone A.
  • a zone C where the particles of the material streams collide with each other and impact plates, is located further away from the vertical axis of the rotating rotors.
  • the peripheral speed of the rotor disks and the material on them is even higher in this zone.
  • the changed configuration of the rotors in this zone makes it possible to bring about a collision of a large number of air flows with the maximum concentration of solid particles from the channels of the upper and lower rotors. Particle size reduction occurs by colliding the material, similar to jet mills, but at incomparably faster speeds with minimal energy costs.
  • Air extraction devices are also installed on the shredder housing (not shown on the drawings).
  • the concentration of the two-phase medium of the material to be shredded in the housing can be changed by removing air from the outer rotor surface. This enables more efficient comminution in an additional annular area between the inner wall of the comminution chamber and the edges of the rotors.
  • the comminution device comprises the following components: a housing with an axial inlet opening, a tangential outlet opening and an annular, essentially cylindrical comminution chamber. In the latter, two horizontally and coaxially arranged rotors are mounted. These rotors can rotate in opposite directions and are provided with crushing elements arranged in a ring shape on their facing surfaces. Channels with a closed cross-section run between these comminution elements, which are mounted at an angle to the rotor body.
  • the annular areas of the rotors also include cavities or indentations which form an additional comminution zone.
  • Impingement plates are also preferably installed inside the housing, between the inner wall and the edges of the rotors. When the material jet impacts, the angle of these impact plates changes, creating an additional crushing zone.
  • the impact plates can be arranged in one row or in several rows one above the other.
  • Air extraction devices are preferably also mounted on the housing of the shredder. By taking air The concentration of the material to be crushed in the two-phase medium can be changed from the surface of the rotors. This enables more efficient comminution in an additional annular zone between the inner wall of the comminution chamber and the edges of the rotors.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP19189504.4A 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage Active EP3603811B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22201926.7A EP4186596A1 (de) 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018212830.8A DE102018212830B3 (de) 2018-08-01 2018-08-01 Zerkleinerungsverfahren und -anlage

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP22201926.7A Division EP4186596A1 (de) 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage

Publications (2)

Publication Number Publication Date
EP3603811A1 EP3603811A1 (de) 2020-02-05
EP3603811B1 true EP3603811B1 (de) 2022-11-02

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ID=67514456

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EP19189504.4A Active EP3603811B1 (de) 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage
EP22201926.7A Pending EP4186596A1 (de) 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage

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EP22201926.7A Pending EP4186596A1 (de) 2018-08-01 2019-08-01 Zerkleinerungsverfahren und -anlage

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EP (2) EP3603811B1 (lt)
DE (1) DE102018212830B3 (lt)
LT (1) LT3603811T (lt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021235800B2 (en) * 2020-03-12 2024-06-13 Tritana Intellectual Property Ltd. Weed seed destruction
DE102020204780A1 (de) 2020-04-15 2021-10-21 Elena Vladimirovna Artemieva Vorrichtung und Verfahren zum Zerkleinern von festen Materialien

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2166367C1 (ru) * 2000-10-17 2001-05-10 Артемьева Елена Владимировна Способ и устройство для измельчения материалов

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337998A1 (de) * 1993-11-06 1995-05-11 Escher Wyss Gmbh Mahlmaschine und Mahlwerkzeug zum Mahlen von suspendiertem Faserstoffmaterial
RU2070094C1 (ru) 1993-12-06 1996-12-10 Артемьева Елена Владимировна Способ сверхтонкого измельчения материалов
AU8468098A (en) 1998-04-03 1999-10-25 Alexei Vyacheslavovich Kontyaev Method and device for grinding materials
US6286771B1 (en) * 1998-08-25 2001-09-11 Charles Kepler Brown, Jr. Two-stage micronizer for reducing oversize particles
DE202011106419U1 (de) 2010-12-15 2012-01-10 Elena Vladimirovna Artemieva Anlage zum Mahlen von Materialien
JP5807919B2 (ja) 2013-07-31 2015-11-10 大学共同利用機関法人自然科学研究機構 糖尿病による代謝異常を改善するための組成物

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2166367C1 (ru) * 2000-10-17 2001-05-10 Артемьева Елена Владимировна Способ и устройство для измельчения материалов

Also Published As

Publication number Publication date
LT3603811T (lt) 2023-02-10
EP3603811A1 (de) 2020-02-05
DE102018212830B3 (de) 2020-01-23
EP4186596A1 (de) 2023-05-31

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