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EP4054766B1 - Broyeur - Google Patents

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Publication number
EP4054766B1
EP4054766B1 EP20884718.6A EP20884718A EP4054766B1 EP 4054766 B1 EP4054766 B1 EP 4054766B1 EP 20884718 A EP20884718 A EP 20884718A EP 4054766 B1 EP4054766 B1 EP 4054766B1
Authority
EP
European Patent Office
Prior art keywords
rotor
mill
bottom plate
mill according
driving shaft
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
EP20884718.6A
Other languages
German (de)
English (en)
Other versions
EP4054766A4 (fr
EP4054766C0 (fr
EP4054766A1 (fr
Inventor
Pertti Hänninen
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.)
Moviator Oy
Original Assignee
Moviator Oy
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 Moviator Oy filed Critical Moviator Oy
Publication of EP4054766A1 publication Critical patent/EP4054766A1/fr
Publication of EP4054766A4 publication Critical patent/EP4054766A4/fr
Application granted granted Critical
Publication of EP4054766C0 publication Critical patent/EP4054766C0/fr
Publication of EP4054766B1 publication Critical patent/EP4054766B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the 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
    • B02C13/26—Details
    • B02C13/30—Driving mechanisms
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the present invention relates to a mill as defined in the preamble of claim 1, which mill is intended for crushing steel slag or bottom ash so that metals and slag materials can be separated.
  • mills of the prior art which are intended for crushing steel slag or bottom ash, are single rotor mills or they comprise other kinds of crushing mechanisms.
  • the problem with the mills of that kind is that the required impact velocity for crushing of sufficient quality is not achieved.
  • the mills of that kind are not adequately suited for the materials mentioned above.
  • the simple and inventive solution presented in the international patent publication No. WO2019/141906 A1 is intended to eliminate this problem.
  • the mill according to the WO publication comprises a crushing element with two rotors, an inner rotor and an outer rotor that are rotating opposite to each other. In that way the impact velocity can be doubled.
  • the mills of the prior art are mainly also so-called dry mills.
  • One significant problem then is that when they are in operation, they emit a huge amount of fine dust which is often also toxic.
  • the object of the present invention is to eliminate the drawbacks of the prior art in general described above and to further develop the mill described in the Finnish patent.
  • One object of the invention is also to improve the effectiveness of the mill so that the outcome of the crushed material is easily adjustable by the speeds and rotation directions of the rotors of the mill.
  • the mill according to the invention is characterized by what is presented in the characterization part of claim 1.
  • Other embodiments of the invention are characterized by what is presented in the other claims.
  • the present invention provides a mill for crushing steel slag or bottom ash to separate metals and slag.
  • the mill comprises a casing, a cover plate, a bottom plate and a crushing mechanism inside the casing by means of which crushing mechanism the steel slag and/or the bottom ash are crushed.
  • the crushing mechanism comprises an inner rotor and an outer rotor, and the material to be crushed is arranged to be fed to the center area of the inner rotor, from where it is ejected by centrifugal force to the outer rotor and further outwards through the outlets.
  • the mill comprises a lower rotor below the inner rotor and outer rotor, which lower rotor is arranged to receive its rotational motion from its own power source.
  • the lower rotor comprises a bottom plate which comprises openings for the crushed material to fall through the openings.
  • the solution according to the invention has the advantage that thanks to the third rotor under the two other rotors the outcome of the crushed material is easily adjustable by the speeds and rotation directions of the rotors of the mill.
  • Another advantage is the air gap between the driving shaft of the outer rotor and the feeder hopper, which air gap makes it possible to feed among other things pressurized air or compressed air to the crushing mechanism.
  • pressurized air also water and/or various chemicals may be fed to the crushing mechanism so that, for instance the water disintegrates into small droplets among the pressurized air. This prevents poisonous particles from exiting the mill with dust particles.
  • various chemicals that may be fed separately or together with the air and/or water may be made to react positively with small poisonous particles of the crushed materials and thus to prevent detrimental emissions effectively on their own behalf.
  • air/water mixture improves the distribution of the material to be crushed and also cools the material at the same time.
  • the mill according to the invention is intended for crushing steel slag so that metals and slag materials can be separated.
  • the mill comprises a casing 1, a cover plate 2 and a bottom plate 3. Inside the casing 1 the mill comprises a crushing mechanism 4 by the help of which the steel slag can be crushed.
  • the mill also comprises a feeder hopper 7 through which the material to be crushed is fed into the casing 1 of the mill, and further the mill comprises a power arrangement to power the mill, and also a control system to control and adjust the operations of the mill.
  • the crushing mechanism 4 comprises two co-axial contra-rotating rotors; an inner rotor 5 and an outer rotor 6 which are rotating opposite each other.
  • the rotors 5 and 6 overlap each other vertically so that the inner rotor 5 is substantially below and totally or partially inside the outer rotor 6.
  • the inner rotor 5 comprises a substantially circular bottom plate 5e and a group of radial rotor vanes 5a fastened onto the bottom plate 5e.
  • the rotor vanes 5a of the inner rotor 5 extend upwards from the bottom plate 5e inside the inner circle of the crushing blades 6a of the outer rotor 6.
  • the outer rotor 6 is the uppermost rotor and comprises a substantially circular cover plate 6e and a group of crushing blades 6a in its outer circumference.
  • the crushing blades 6a of the outer rotor 6 extend downwards outside the outer circle of the vanes 5a of the inner rotor 5 so that advantageously the lower ends of the crushing blades 6a of the outer rotor 6 are near the upper surface of the bottom plate 5e of the inner rotor 5 or below it.
  • the crushing mechanism 4 also comprises a third rotor or a lower rotor 8 in the casing 1 below the rotors 5 and 6.
  • the lower rotor 8 comprises a bottom plate 8e and a group of crushing blades 8a in its outer circumference.
  • the crushing blades 8a of the lower rotor 8 extend upwards outside the outer circle of the inner rotor 5.
  • the bottom plate 8e of the lower rotor 8 comprises openings 9 which may preferably be between the crushing blades 8a that are in the outer circumference of the lower rotor 8.
  • the openings 9 may, for instance, be semicircular in shape and extend from the outer circumference of the bottom plate 8e towards the center of the bottom plate 8e, or the openings may also be circular or of any shape in the area of the bottom plate 8e of the lower rotor 8.
  • All the three rotors 5, 6, 8 are co-axial and have their own driving shafts 5b, 6b and 8b and power sources, such as electric motors.
  • the driving shaft 6b of the outer rotor 6 is a hollow shaft and is advantageously bearing-mounted on the cover plate 2 of the casing 1.
  • the power and rotational motion for the driving shaft 6b of the outer rotor 6 is preferably transmitted from its own power source through a transmission belt 6c and driving shaft pulley 6d that is fastened onto the driving shaft 6b.
  • the driving shaft 8b of the lower rotor 8 is also a hollow shaft and is advantageously bearing-mounted on the bottom plate 3 of the casing 1.
  • the power and rotational motion for the driving shaft 8b of the lower rotor 8 is preferably transmitted from its own power source through a transmission belt 8c and driving shaft pulley 8d that is fastened onto the driving shaft 8b.
  • the driving shaft 5b of the inner rotor 5 is preferably bearing-mounted inside the hollow driving shaft 8b of the lower rotor 8.
  • the power and rotational motion for the driving shaft 5b of the inner rotor 5 is preferably transmitted from its own power source through a transmission belt 5c and driving shaft pulley 5d that is fastened onto the driving shaft 5b.
  • the control system of the mill comprises adjustment means by the help of which the speed and/or direction of rotation of each rotor 5, 6, and 8 may be adjusted. Preferably, rotational speeds and directions of rotation of the rotors 5, 6 and 8 can be adjusted independently of each other.
  • the control system and adjustment means may be in common to all the power sources of the rotors 5, 6 and 8, or each power source may have its own control system and adjustment means.
  • the feeder hopper 7 comprises a funnel-shaped upper part 7a and a tubular lower part 7b that is inserted into the hollow driving shaft 6b of the outer rotor 6 and preferably extends down into the center area of the inner rotor 5.
  • the material 12 to be crushed is arranged to be fed through the feeder hopper 7 into the center area of the inner rotor 5, from which it is ejected by the centrifugal force onto the crushing blades 6a of the outer rotor 6, and further down to the lower rotor 8. After the lower rotor 8 the crushed material falls out from the casing 1 through the outlet openings 10 which are below the lower rotor 8 in the bottom plate 3 of the casing 1.
  • the mill below the feeder hopper 7 the mill comprises a cone 11 tapering upwards from the bottom plate 5e in the center of the inner rotor 5.
  • the cone 11 is arranged to guide the steel slag or bottom ash onto the vanes 5a of the inner rotor 5.
  • the mill according to the invention also comprises a feed channel 13 to feed pressurized air, water or chemicals or their mixtures into the material inside the casing 1, for instance in the direction of arrow 14.
  • the feed channel 13 may be a circular gap between the driving shaft 6b of the outer rotor 6 and the feeder hopper 7, and it may extend downwards into the center area of the space between the inner rotor 5 and the outer rotor 6.
  • the feed channel 13 makes it possible to feed among other things pressurized air to the crushing mechanism 4.
  • water and/or various chemicals may be fed to the crushing mechanism 4 so that, for instance, the water disintegrates into small droplets among the pressurized air. This prevents poisonous particles from exiting the mill with dust particles.
  • various chemicals that may be fed separately or together with the air and/or water may be made to react positively with the small poisonous particles of the crushed materials and thus to prevent detrimental emissions effectively.
  • the components of the mill have been manufactured of a suitable steel material with both durability and toughness.
  • the mill is also suitable not only for crushing steel slag and bottom ash but also for crushing other slag materials.
  • the separation of the metals from the crushed material is carried out by methods known per se.
  • Iron particles can be separated, for example, by a magnetic separator and other non-magnetic metals, for example, by known chemical methods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (11)

  1. Un broyeur pour le broyage de scories d'acier ou de mâchefers pour séparer les métaux et les scories, lequel broyeur comprend un boîtier (1), une plaque de couverture (2), une plaque de fond (3) et un mécanisme de broyage (4) à l'intérieur du boîtier (1) au moyen duquel le mécanisme de broyage (4) broie les scories d'acier et/ou les mâchefers, et lequel mécanisme de broyage (4) comprend un rotor intérieur (5) et un rotor extérieur (6), et que le matériau à broyer est arrangé pour être alimenté dans la zone centrale du rotor intérieur (5), d'où il est éjecté par une force centrifuge vers le rotor extérieur (6) et plus loin vers l'extérieur par des sorties (10) caractérisés par un rotor inférieur (8) au-dessous du rotor intérieur (5) et du rotor extérieur (6), Ce rotor inférieur (8) est conçu pour recevoir son mouvement de rotation de sa propre source d'énergie, et est en outre caractérisé en ce que le rotor inférieur (8) comprend une plaque de fond (8e) qui comprend des ouvertures (9) pour que le matériau broyé tombe à travers les ouvertures (9).
  2. Un broyeur selon la revendication 1, caractérisé en ce que chacun des trois rotors (5, 6, 8) a sa propre source d'énergie, telle qu'un moteur électrique, au moyen duquel les vitesses et les directions de rotation des rotors (5, 6, 8) sont arrangées indépendamment les unes des autres.
  3. Un broyeur selon la revendication 1 ou 2, caractérisé en ce que le broyeur comprend un système de contrôle et des moyens de réglage pour contrôler et régler indépendamment la vitesse de rotation de chaque rotor (4, 5, 8).
  4. Un broyeur selon la revendication 1, 2 ou 3, caractérisé en ce que le broyeur comprend un système de commande et des moyens de réglage pour contrôler et régler indépendamment le sens de rotation de chaque rotor (4, 5, 8).
  5. Un broyeur selon l'une des revendications précédentes, caractérisé en ce que le rotor extérieur (6) comprend un arbre d'entraînement tubulaire (6b) et le rotor inférieur (8) comprend un arbre d'entraînement tubulaire (8b), et le rotor intérieur (5) comprend un arbre d'entraînement (5b) qui est placé à l'intérieur de l'arbre d'entraînement tubulaire (8b) du rotor inférieur (8).
  6. Un broyeur selon l'une des revendications précédentes, caractérisé en ce que le broyeur comprend une trémie d'alimentation (7) ayant une partie inférieure tubulaire (7b) qui est insérée dans l'arbre d'entraînement creux (6b) du rotor extérieur (6) et s'étend de préférence vers le bas dans la zone centrale du rotor intérieur (5).
  7. Un broyeur selon l'une quelconque des revendications précédentes, caractérisé en ce que le broyeur comprend un canal d'alimentation (13) pour alimenter l'air sous pression, l'eau ou les produits chimiques ou leurs mélanges dans le matériau à l'intérieur du boîtier (1).
  8. Un broyeur selon la revendication 7, caractérisé en ce que le canal d'alimentation (13) est un espace circulaire entre l'arbre d'entraînement tubulaire (6b) du rotor extérieur (6) et la partie inférieure (7b) de la trémie d'alimentation (7).
  9. Un broyeur selon l'une des revendications précédentes, caractérisé en ce que sous la partie inférieure tubulaire (7b) de la trémie d'alimentation (7), le moulin comprend un cône (11) se rétrécissant vers le haut à partir d'une plaque de fond (5e) dans la zone centrale du rotor interne (5).
  10. Un broyeur selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de broyage du rotor inférieur (8) sont des lames de broyage (8a) s'étendant vers le haut.
  11. Un broyeur selon l'une quelconque des revendications précédentes, caractérisé en ce que les ouvertures (9) sont l'une ou plusieurs des suivantes : de forme semi-circulaire et s'étendant de la circonférence extérieure de la plaque de fond (8e) entre les lames de broyage (8a) vers le centre de la plaque de fond (8e) ; de forme circulaire dans la zone libre de la plaque de fond (8e) ; de forme quelconque dans la zone libre de la plaque de fond (8e).
EP20884718.6A 2019-11-04 2020-10-28 Broyeur Active EP4054766B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20190084 2019-11-04
PCT/FI2020/050708 WO2021089912A1 (fr) 2019-11-04 2020-10-28 Broyeur

Publications (4)

Publication Number Publication Date
EP4054766A1 EP4054766A1 (fr) 2022-09-14
EP4054766A4 EP4054766A4 (fr) 2023-12-27
EP4054766C0 EP4054766C0 (fr) 2025-06-04
EP4054766B1 true EP4054766B1 (fr) 2025-06-04

Family

ID=75849581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20884718.6A Active EP4054766B1 (fr) 2019-11-04 2020-10-28 Broyeur

Country Status (2)

Country Link
EP (1) EP4054766B1 (fr)
WO (1) WO2021089912A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250041872A1 (en) * 2021-08-31 2025-02-06 Moviator Oy Apparatus and method for crushing lumpy material
FI13387Y1 (fi) * 2023-03-21 2023-05-24 Moviator Oy Mylly
FI13537Y1 (fi) * 2023-11-24 2024-01-26 Moviator Oy Mylly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61110912U (fr) * 1984-12-26 1986-07-14
FI117094B (fi) * 2003-01-15 2006-06-15 Fractivator Oy Menetelmä orgaanisen jätteen hajottamiseksi
DE102013110352A1 (de) * 2013-09-19 2015-03-19 Pms Handelskontor Gmbh Zerkleinerungsvorrichtung
RU2577630C1 (ru) * 2014-12-15 2016-03-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Дезинтегратор
WO2019141906A1 (fr) * 2018-01-18 2019-07-25 Moviator Oy Broyeur
CN110075971A (zh) * 2019-06-10 2019-08-02 黄代珍 锤头同层内外对旋式立轴高能破碎机

Also Published As

Publication number Publication date
EP4054766A4 (fr) 2023-12-27
EP4054766C0 (fr) 2025-06-04
EP4054766A1 (fr) 2022-09-14
WO2021089912A1 (fr) 2021-05-14

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