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EP0366759A1 - Procede pour broyer des matieres friables. - Google Patents

Procede pour broyer des matieres friables.

Info

Publication number
EP0366759A1
EP0366759A1 EP89905398A EP89905398A EP0366759A1 EP 0366759 A1 EP0366759 A1 EP 0366759A1 EP 89905398 A EP89905398 A EP 89905398A EP 89905398 A EP89905398 A EP 89905398A EP 0366759 A1 EP0366759 A1 EP 0366759A1
Authority
EP
European Patent Office
Prior art keywords
comminution
fed
stage
mill
tube mill
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.)
Granted
Application number
EP89905398A
Other languages
German (de)
English (en)
Other versions
EP0366759B1 (fr
Inventor
Franz Thomas
Herbert Weit
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.)
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Original Assignee
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6353633&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0366759(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Christian Pfeiffer Maschinenfabrik GmbH and Co KG filed Critical Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Priority to AT89905398T priority Critical patent/ATE97836T1/de
Publication of EP0366759A1 publication Critical patent/EP0366759A1/fr
Application granted granted Critical
Publication of EP0366759B1 publication Critical patent/EP0366759B1/fr
Anticipated expiration legal-status Critical
Revoked 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

Definitions

  • the invention relates to a method for comminuting brittle regrind according to the preamble of claim 1.
  • the good-bed roller mills usually used for simultaneous single-grain and material-bed comminution have the advantage that they can be used to grind relatively fine-grained and regrind particles ⁇ 2 mm are possible.
  • a material bed roller mill requires a relatively high investment in comparison to other mills or crushers.
  • the coarse particles passing through the material bed roller mill make it necessary, for example, for the downstream comminution by means of a gravity mill and, in particular, a tube mill, also with grinding media of relative. large diameter must be equipped. Large steel balls are inevitably also available due to the coarse particles passing through a material bed roller mill.
  • the present invention is therefore based on the object of designing the generic method in such a way that, on the one hand, the specific energy requirement for a specific quantity of regrind is improved and, furthermore, the overall economy is considerably increased by a sharp reduction in investment costs, with a flexible design ⁇ possibility of the method should be given.
  • this object is achieved in a generic method by the features of the characterizing part of claim 1.
  • An essential core idea of the invention can be seen in ge, the first crushing process of Mahl ⁇ guts mill no longer be carried out with a relatively expensive material bed Walzen ⁇ but with a primary crusher and 'ins ⁇ particular a centrifugal crusher.
  • this primary crusher it is consciously accepted that the ground material particles leaving the primary crusher are not broken up as finely as, for example, in a vertical bed roller mill.
  • less coarse material is produced with a significantly reduced coarse material, which would otherwise hinder the comminution of the coarse material by its buffering action in a second shredding stage. This eliminates the previously serious disadvantage that even relatively large particles are fed to the subsequent processing stages in a fine material bed.
  • the diameter of the used Keep the grinding media smaller, use the pre-shredded material in a targeted manner and thereby also reduce the degree of filling.
  • centrifugal crusher as a primary crusher, which is in itself an independent feature of the invention, with which one deliberately proceeds from the previous idea of the smallest possible size reduction in the first stage and takes a comparatively contrary measure, brings the advantage less Investments.
  • a centrifugal crusher is usually significantly less maintenance and easier to maintain than a Gutbett roller mill, which is usually designed with oil hydraulics for generating high pressures.
  • a relatively low construction of the plant can also be achieved. In this way, not only is a cost-effective method implemented in terms of plant technology, but also the specific work and energy requirements can be considerably reduced. Experimentally, values in the range of 2 to 2.5 kWh / t were achieved.
  • the semolina or the coarse particles of the screening process are suitably returned to the second comminution stage.
  • the discharge material which is essentially in the form of agglomerates (slugs)
  • agglomerates slugs
  • the discharge material can additionally be added to a downstream centrifugal crusher for deagglomeration and coarse material comminution. be carried out in order to then be available agglomerate-free for further treatment.
  • Another advantage of the process is that no agglomerates (slugs) are produced in the centrifugal crusher. This also enables problem-free separation of the pre-shredded goods into coarse and fine goods (e.g. by sifting). The fine material is drawn off before the second comminution stage and thus the economy is further increased, since no undesired fine material gets into the second comminution stage.
  • FIG. 1 shows the basic illustration of a plant for the continuous comminution of regrind, in which, after the first comminution stage, the material is fed directly to a second comminution stage;
  • FIG. 2 shows a process sequence with the comparable parts of the plant according to FIG. 1, but a visual process is interposed before the second comminution stage and
  • FIG. 3 shows a further variant of the invention, in which a screening is carried out after the first comminution and only the ground material up to a certain particle size is fed to the second comminution stage.
  • 1 shows a schematic representation of the process sequence in an alternative, which is preferred.
  • the regrind which can be cement clinker, for example, is fed to the entire system 1 from a feed bunker 2 via a scale 3.
  • a time-metered supply can be carried out by means of the scale 3.
  • the ground material is fed to a primary crusher 4, which is preferably a centrifugal crusher.
  • the material comminuted up to a relatively defined maximum grain size in the centrifugal crusher 4 is passed directly over a section 5 into the second comminution stage, which is designed here as a two-chamber tube mill 6.
  • the first chamber 7 of the tube mill 6 has, for example, steel balls as grinding media with diameters in the range from 40 to 60 mm.
  • the second chamber 8 adjoining the intermediate wall 9 is provided with steel balls in the range from 10 to 30 mm and preferably with diameters in the range from 15 to 30 mm.
  • the coarse material is discharged downwards and passes via a conveyor section which is provided with a bucket elevator 11 and the line 17 into a classifier 18.
  • a cross-flow classifier, the size of which is particularly suitable for the classifier 18 the coarse material outlet 20 and the line 21 of the tube mill 6 are fed as a second crushing stage.
  • the fines particles discharged into the fines outlet are withdrawn from the process circuit via a removal section 16.
  • the air-fine particle mixture at the outlet 23 of the tube mill 6 is fed via a line 12 to a filter 13 in which the fine particles are separated from the air.
  • the fine material particles are fed via the fine material outlet 15 to the removal section 16, while the air is exits 14, if necessary, is returned to the process cycle.
  • the regrind 4 comminuted at the exit of the relatively low investment has a well-defined grain size, for which there are largely no larger regrind particles beyond the desired size range.
  • FIG. 2 shows a variant of the plant according to FIG. 1 for carrying out the method according to the invention.
  • Corresponding reference numerals relate to the same parts of the system.
  • the difference compared to the embodiment according to FIG. 1 is that the centrifugal crusher 4 of the first crushing stage is now directly followed by the classifier 18.
  • the grit of the classifier 18 in the example according to FIG. 2 is now supplied via the coarse material outlet 20 and the line 21 in the circuit of the tube mill 6, the equipment of which with grinding elements is corresponding to the embodiment according to FIG. 1.
  • the material fed to the bucket elevator 11 arrives in the sifter 18.
  • the coarse material obtained after the sifting process is again fed into the second comminution stage 6 via the return line 41a.
  • the method according to the invention and the plant alternatives provided therefor reduce the specific work required per intended quantity of regrind, this being supplemented by wear reductions at least on the second size reduction stage.
  • it also requires lower investment costs than comparable systems according to the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

Les procédés existants de broyage de matières friables sont basés uniquement sur une première phase de fragmentation de chaque gran et de l'ensemble de la matière et se révèlent peu économiques. Aussi la présente invention propose-t-elle un broyage préliminaire de ladite matière jusqu'à une granulométrie relativement précise, les phases ultérieures étant adaptées en conséquence à ladite granulométrie de manière à réduire le travail nécessaire en fonction de la quantité de matière à broyer.
EP89905398A 1988-05-04 1989-05-03 Procede pour broyer des matieres friables Revoked EP0366759B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89905398T ATE97836T1 (de) 1988-05-04 1989-05-03 Verfahren zur zerkleinerung von sproedem mahlgut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815217A DE3815217A1 (de) 1988-05-04 1988-05-04 Verfahren zur zerkleinerung von sproedem mahlgut
DE3815217 1988-05-04

Publications (2)

Publication Number Publication Date
EP0366759A1 true EP0366759A1 (fr) 1990-05-09
EP0366759B1 EP0366759B1 (fr) 1993-12-01

Family

ID=6353633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905398A Revoked EP0366759B1 (fr) 1988-05-04 1989-05-03 Procede pour broyer des matieres friables

Country Status (5)

Country Link
US (1) US5058813A (fr)
EP (1) EP0366759B1 (fr)
JP (1) JPH0751221B2 (fr)
DE (2) DE3815217A1 (fr)
WO (1) WO1989010790A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5417760A (en) * 1993-02-04 1995-05-23 F. L Smidth & Co. A/S Method for manufacturing of normal as well as ultra-fine cement

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH089016B2 (ja) * 1991-05-14 1996-01-31 川崎重工業株式会社 竪型ローラミルによる粉砕装置および粉砕方法
DE4122717C2 (de) * 1991-07-09 1994-04-14 Ear Gmbh Verfahren und Vorrichtung zur Aufbereitung von Metallträger-Katalysatoren
DE4320025A1 (de) * 1993-06-17 1994-12-22 Krupp Polysius Ag Mahlanlage und Verfahren zum Mahlen und Sichten von sprödem Mahlgut
DE102011088414A1 (de) * 2011-12-13 2013-06-13 Cerdur Ceramic GmbH Mahlverfahren und Mahlvorrichtung zur Herstellung von Nano-Mahlgut
DE102013005931A1 (de) * 2013-04-05 2014-10-09 Micro Impact Mill Limited Vorrichtung und Verfahren zum Erzzerkleinern mit Rückführung
CN103263966A (zh) * 2013-06-17 2013-08-28 长兴电子材料（昆山）有限公司 一种粉碎球磨一体机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1219779B (de) 1962-12-12 1966-06-23 Polysius Gmbh Mahltrocknungsverfahren und Anlage zur Durchfuehrung des Verfahrens
DE1266618B (de) * 1965-05-12 1968-04-18 Rheinische Kalksteinwerke Verfahren zur Regelung fuer das Feinmahlen von Mahlgut unterschiedlicher Mahlbarkeit bei konstanter Aufgabenmenge
DE2620463C2 (de) * 1976-05-08 1983-01-13 Klöckner-Humboldt-Deutz AG, 5000 Köln Mahltrocknungsanlage
DE2620461A1 (de) * 1976-05-08 1977-11-24 Kloeckner Humboldt Deutz Ag Mahltrocknungsanlage
US4398673A (en) 1980-06-12 1983-08-16 Domtar Industries Inc. Method of classifying and comminuting a gypsum ore or the like
DE3302176A1 (de) * 1983-01-24 1984-07-26 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und anlage zur kontinuierlichen druckzerkleinerung sproeden mahlgutes
DE3314103A1 (de) * 1983-04-19 1984-10-25 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und anlage zur gemeinsamen mahlung zweier oder mehrerer unterschiedlich mahlbarer sproeder stoffe
DE3506486A1 (de) * 1985-02-23 1986-08-28 Klöckner-Humboldt-Deutz AG, 5000 Köln Einrichtung zur zerkleinerung und mahlung sproeden mahlgutes wie zum beispiel zementklinker, erz, kohle oder dergleichen
DE3520069A1 (de) * 1985-06-04 1986-12-04 Krupp Polysius Ag, 4720 Beckum Verfahren und anlage zur zweistufigen zerkleinerung
DE3609229A1 (de) * 1986-03-19 1987-09-24 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von sproedem mahlgut
DE3644342A1 (de) * 1986-12-23 1988-07-07 Krupp Polysius Ag Verfahren und anlage zur zweistufigen zerkleinerung von sproedem mahlgut
DE3717976A1 (de) * 1987-05-27 1988-12-08 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von mahlgut

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910790A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5417760A (en) * 1993-02-04 1995-05-23 F. L Smidth & Co. A/S Method for manufacturing of normal as well as ultra-fine cement

Also Published As

Publication number Publication date
DE58906304D1 (de) 1994-01-13
US5058813A (en) 1991-10-22
EP0366759B1 (fr) 1993-12-01
DE3815217C2 (fr) 1991-01-10
DE3815217A1 (de) 1989-11-16
JPH0751221B2 (ja) 1995-06-05
JPH02501544A (ja) 1990-05-31
WO1989010790A1 (fr) 1989-11-16

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