EP3655164A1 - Circuit de broyage à deux niveaux et procédé pour la fabrication d'un produit broyé au moyen d'un broyage à deux niveaux - Google Patents

Circuit de broyage à deux niveaux et procédé pour la fabrication d'un produit broyé au moyen d'un broyage à deux niveaux

Info

Publication number
EP3655164A1
EP3655164A1 EP18740781.2A EP18740781A EP3655164A1 EP 3655164 A1 EP3655164 A1 EP 3655164A1 EP 18740781 A EP18740781 A EP 18740781A EP 3655164 A1 EP3655164 A1 EP 3655164A1
Authority
EP
European Patent Office
Prior art keywords
mill
grinding
stage
dynamic
grits
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.)
Pending
Application number
EP18740781.2A
Other languages
German (de)
English (en)
Inventor
Guido KACHE
Michael Wilczek
Björn-Olaf ASSMANN
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.)
Thyssenkrupp Polysius GmbH
ThyssenKrupp AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
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 ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Publication of EP3655164A1 publication Critical patent/EP3655164A1/fr
Pending 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of 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
    • B02C21/00—Disintegrating plant with or without drying of the material
    • 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
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • a two-stage grinding circuit for energy-saving crushing of blast furnace slag-containing cements is known.
  • a ball, good bed roller or vertical mill roller is optionally used.
  • a ball mill, a vertical roller mill or a stirred ball mill are used as the mill of the second grinding stage.
  • Also known from DE 195 01 616 A1 is a plant for comminuting regrind, preferably for fine and ultrafine grinding of comminuted millbase, in which for energy-saving two-stage refining a roller press or high-pressure roller press are used as a first grinding stage and a stirred ball mill as a second grinding stage.
  • the first grinding stage is equipped with a classifier, which returns the coarse material of the comminuted material comminuted in the first grinding stage to the grinding stage.
  • the fine material then enters the second grinding stage, which in turn is combined with a classifier.
  • the invention is based on the object, the efficiency of the two-stage
  • a portion of the grits of the first dynamic classifier is diverted and at least partially abandoned to the second mill.
  • the fresh material applied to the first grinding stage usually has a particle size of up to 30,000 ⁇ .
  • the comminuted material is transported via an air flow to a classifier usually arranged above the grinding table.
  • the fines which usually has a mean particle size ⁇ 63 ⁇ , discharged together with the air flow through the rotor basket.
  • the coarse material has an average particle size of about 45 ⁇ to 8,000 ⁇ and is rejected by the rotor basket and falls by gravity on the Gr manekonus back on the grinding table.
  • the coarse material has already been comminuted at least once on the grinding table and has been transported via the air flow to the classifier, the coarse material has a significantly smaller average particle size ( ⁇ 8,000 ⁇ m) than the fresh product ( ⁇ 30,000 ⁇ m).
  • This higher fineness leads to a reduction of the grinding efficiency of the vertical roller mill, as the packing density of the bed increases due to the broader particle size distribution on the grinding table and thus the degree of voiding is reduced.
  • the degree of voiding of the good bed before the load is a criterion for the efficiency of the comminution.
  • a finished silo may be provided which communicates with the fines effluent of the first dynamic sifter and / or second dynamic sifter and / or the outlet of the second mill.
  • the branched grits may be subjected to single or multi-stage screening prior to being fed to the second mill, resulting in coarser and finer grits, and only the finer grits of the second grinder being fed, while the coarser grits are fed to the vertical roller mill to be led back.
  • the second mill i. the agitator ball mill or ball mill is dry, i. without adding a liquid.
  • the first exemplary embodiment of a two-stage grinding cycle shown in FIG. 1 has a first grinding stage 1 and a second grinding stage 2.
  • the first grinding stage 1 comprises a vertical roller mill 10, which is shown in somewhat more detail in FIG. In particular, it comprises a grinding table 11, a plurality of grinding rollers 12 cooperating with the grinding table, and a dynamic sifter 13.
  • the fresh material 3 to be comminuted may contain, in addition to cement clinker, one or more of the following components: granulated slag, limestone, natural and naturally tempered pozzolan, fly ash , burned slate, silicate dust.
  • the fresh material 3 passes through a Frischgutschurre 14 in the middle of the grinding table 11, where it gets outwardly under the grinding rollers 12 due to the centrifugal force.
  • the crushed under the grinding rollers 12 material passes over the Mahltellerrand and is detected there by a supplied below the Mahltellers airflow 4 and transported to the arranged above the Mahltellers, first dynamic classifier 13.
  • the fine material 5 is discharged together with the air stream 4 via the fine material output 15 and fed to a cyclone separator 6.
  • the separated in the cyclone 6 fines 5 is discharged as finished goods. While part of the air stream cleaned by the cyclone separator 6 is further dedusted in another dust separator 7, another part is returned to the vertical roll mill as a classifying air.
  • the proportions can vary from 0% to 100%.
  • the rejected in the dynamic classifier 13 Grits 8 are returned to the grinding table via a semolina refinery formed as a semolina cone 16.
  • a mixing box 17 is provided, in which the recirculated grits 8 and the fresh material 3 fed via the fresh goods chute 14 are mixed with one another before the mixture reaches the center of the grinding plate.
  • a semisuction device 18 is connected, via which a portion of the grits can be discharged from the vertical roller mill 10.
  • This semolina discharge device 18 is formed, for example, by a conveying device which projects into the semolina recirculation 16 designed as semolina cone. There, the discharge device 18 cooperates, for example, with a collecting hopper 19, to direct a portion of the reject rejected by the rotor 8 on the Gr maneabzugs affection 18.
  • the second grinding stage 2 has a second mill 20 designed as a ball mill or as an agitating ball mill, which comprises an inlet 21 and an outlet 22.
  • the semolina discharge device 18 is connected to the inlet 21 of the second mill 20 either directly or indirectly via a classifying device 23.
  • a classifying device 23 In the illustrated embodiment, such sortungsoder classifying device 23 is provided, which may be formed either one or more stages. It separates the grits discharged via the semolina discharge device 18 into coarser grits 8a and finer grits 8b. The coarser 8a are returned together with the over the edge of the grinding table 11 down falling regrind 8c via a bucket elevator 30 and a possibly required further conveyor 31 for Frischgutschurre 14.
  • the finer grains 8b pass via the inlet 21 into the second mill.
  • the comminuted finished product 9 is discharged via the outlet 22 of the second mill 20 and combined with the fine material 5 of the cyclone separator 6 via suitable conveying devices.
  • a possibly used in the second mill 20 air flow is dedusted in a dust collector 24.
  • the second mill 20 in the second grinding stage 2, is combined with a dynamic classifier 25, so that the comminuted material of the second mill 20 is first fed to the second dynamic 25, the coarse material 25a of which enters the inlet 21 of the second mill 20 is abandoned while the fines are deposited in a separator 26 as finished 9.
  • a second mill 20 is likewise used in the second grinding stage 2, but in this case the product of the second grinding stage is fed to the classifier of the vertical mill via the classifier blanket, so that the product fineness is set via the dynamic classifier 13 of the vertical mill can.

Landscapes

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

Abstract

Le circuit de broyage à deux niveaux selon l'invention se compose essentiellement d'un premier niveau de broyage (1), comprenant un broyeur à rouleaux vertical (10) comprenant une table de broyage (11), au moins un galet de broyage (12) coopérant avec la table de broyage (11) et un premier cribleur dynamique (13), le premier cribleur dynamique (13) comprenant une sortie de particules fines (15) pour l'évacuation de particules fines (5) et un retour de gravillons (16) pour la réintroduction de broyat (8) à la table de broyage (11), et un deuxième niveau de broyage (2), comprenant un deuxième broyeur (2) formé par un broyeur agitateur à boulets ou un broyeur à boulets, le deuxième broyeur (20) comprenant une entrée (21) et une sortie (22). L'invention concerne en outre un dispositif d'évacuation de broyat (18) pour l'évacuation d'une partie du broyat (8), raccordé au retour de broyat (16) et lié à l'entrée (21) du deuxième broyeur (20).
EP18740781.2A 2017-07-17 2018-07-10 Circuit de broyage à deux niveaux et procédé pour la fabrication d'un produit broyé au moyen d'un broyage à deux niveaux Pending EP3655164A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017115994.0A DE102017115994A1 (de) 2017-07-17 2017-07-17 Zweistufiger Mahlkreislauf und Verfahren zur Herstellung eines gemahlenen Produkts mittels einer zweistufigen Mahlung
PCT/EP2018/068654 WO2019016031A1 (fr) 2017-07-17 2018-07-10 Circuit de broyage à deux niveaux et procédé pour la fabrication d'un produit broyé au moyen d'un broyage à deux niveaux

Publications (1)

Publication Number Publication Date
EP3655164A1 true EP3655164A1 (fr) 2020-05-27

Family

ID=62916647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18740781.2A Pending EP3655164A1 (fr) 2017-07-17 2018-07-10 Circuit de broyage à deux niveaux et procédé pour la fabrication d'un produit broyé au moyen d'un broyage à deux niveaux

Country Status (4)

Country Link
EP (1) EP3655164A1 (fr)
CN (1) CN110869131A (fr)
DE (1) DE102017115994A1 (fr)
WO (1) WO2019016031A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110201773A (zh) * 2019-05-14 2019-09-06 辉县市新科机械设备有限公司 金属硅粉生产加工***

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3717976A1 (de) * 1987-05-27 1988-12-08 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von mahlgut
JP2506796Y2 (ja) * 1991-07-16 1996-08-14 石川島播磨重工業株式会社 予備粉砕装置
DE19501616A1 (de) 1995-01-20 1996-07-25 Kloeckner Humboldt Deutz Ag Mahlverfahren und Anlage zur Zerkleinerung von Mahlgut
JP2001334168A (ja) * 2000-05-29 2001-12-04 Ube Ind Ltd 繊維材の回収方法
DE102007046834B4 (de) 2007-09-29 2010-01-14 Holcim Technology Ltd. Verfahren zur Herstellung von Hüttensandmehl enthaltenden Zementen
CN101722083A (zh) * 2008-10-14 2010-06-09 王华业 一种粉磨方法和粉磨装置
CN103736663B (zh) * 2014-01-23 2017-10-13 陕西三沅重工发展股份有限公司 一种磁铁矿选矿方法
DE102014108334A1 (de) * 2014-06-13 2015-12-17 Thyssenkrupp Ag Mahlanlage und Verfahren zur Zerkleinerung von Mahlgut
DE102014015549A1 (de) * 2014-10-22 2016-04-28 Thyssenkrupp Ag Mahlanlage zum Zerkleinern von Mahlgut sowie Verfahren zum Zerkleinern von Mahlgut
CN205815894U (zh) * 2016-07-26 2016-12-21 新乡市长城机械有限公司 矿渣立磨外循环物料无扬尘输送除铁***

Also Published As

Publication number Publication date
DE102017115994A1 (de) 2019-01-17
WO2019016031A1 (fr) 2019-01-24
CN110869131A (zh) 2020-03-06

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