EP0208947B1 - Procédé et dispositif de broyage de matière à broyer - Google Patents

Procédé et dispositif de broyage de matière à broyer Download PDF

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Publication number
EP0208947B1
EP0208947B1 EP86108468A EP86108468A EP0208947B1 EP 0208947 B1 EP0208947 B1 EP 0208947B1 EP 86108468 A EP86108468 A EP 86108468A EP 86108468 A EP86108468 A EP 86108468A EP 0208947 B1 EP0208947 B1 EP 0208947B1
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EP
European Patent Office
Prior art keywords
grinding
rolls
roll gap
mass flow
roll
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.)
Expired
Application number
EP86108468A
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German (de)
English (en)
Other versions
EP0208947A2 (fr
EP0208947A3 (en
Inventor
Heinrich Dipl.-Ing. Henne
Norbert Dipl.-Ing. Patzelt
Lutz Thomas Dipl.-Ing. Schneider
Osbert Richard Dipl.-Ing. Knobloch
Manfred Dipl.-Ing. Müller
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 Industrial Solutions AG
Original Assignee
Krupp Polysius 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
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Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0208947A2 publication Critical patent/EP0208947A2/fr
Publication of EP0208947A3 publication Critical patent/EP0208947A3/de
Application granted granted Critical
Publication of EP0208947B1 publication Critical patent/EP0208947B1/fr
Expired legal-status Critical Current

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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/42—Driving mechanisms; Roller speed control

Definitions

  • the invention relates to a method and a system for comminuting regrind by means of two rollers pressed against one another at high pressure.
  • the fine and very fine comminution of regrind with brittle material behavior in the gap between two rollers pressed against one another at high pressure is known, for example, from DE-B 2 708 053.
  • the regrind undergoes comminution in the roller gap. If the regrind is fed in with a grain size that is larger than the width of the roller gap, the material is first subjected to single-grain size reduction as it passes through the roller gap, and then immediately to size-size reduction.
  • the feed of the millbase to the roll nip has hitherto generally been effected solely by the action of gravity through a feed chute in which the millbase is at a certain level.
  • Another problem is to ensure over a wide range of throughput variations that the grinding effect and thus the product quality remains constant within narrow limits.
  • the invention is therefore based on the object of developing a method of the type required in the preamble of claim 1 in such a way that in the case of regrind of all types, in particular also in materials which tend to slip on the rollers, a perfect retraction of the regrind into the nip is ensured and with a throughput that changes over a wide range, a constant grinding effect (product granulation) is achieved regardless of the nature of the product.
  • the problems described above can also be avoided with materials that are to be fed in critically.
  • the forced feeding of the millbase according to the invention in a controllable mass flow creates the possibility of keeping the grinding action and thus the product quality constant over a wide variation range of the throughput, by changing the throughput with constant comminution effect, the roller circumferential speed proportional to the forcibly fed Mass flow changed while the grinding force is kept constant.
  • the process according to the invention is suitable for comminution of regrind of all kinds. It has particular advantages for comminution of regrind of high moisture, which is simultaneously mechanically dewatered and comminuted when it passes through the roll nip. In the case of forced feeding to the roll nip, for example via a screw, the regrind can already be subjected to pre-compression.
  • the system shown contains a material bed roller mill 1 with two rollers 2, 3, which are pressed against one another at high pressure.
  • the roller 2 is designed, for example, as a fixed roller, while the roller 3 which is movable in the horizontal direction is pressed in the direction of the stationary roller 2 by an actuating device (for example a number of printing cylinders) which is not illustrated in detail.
  • one or more vertically arranged screws 4 are provided, which are driven by a motor 5 in a speed-controllable manner.
  • the two rollers 2, 3 are surrounded by a housing 6, which is closed at the bottom by a water collecting box 7.
  • This water collecting box 7 has an opening 8 in the middle, below the nip, for the exit of the strand 9 leaving the nip downwards.
  • the opening 8 is limited by slidable cutting 10.
  • wiper strips 11, 12, 13 are also provided on the end faces and on the peripheral sides of the rollers 2, 3.
  • a conveying member 14 which is designed as a rotating sieve and is permeable to liquid and which receives the strand strand 9.
  • a water collecting trough 15 which is inclined to one side (perpendicular to the plane of the drawing in FIG. 1).
  • the regrind (arrow 17) reaches the screw 4 via a chute 16 and is forcibly fed to the roller gap by the screw 4 in a controllable mass flow.
  • the ground material already undergoes a certain amount of pre-compression.
  • the ground material When passing through the nip, the ground material is comminuted, it generally being first subjected to single-grain comminution and then (in the same pass) comminuted material bed. At the same time, the regrind is mechanically dewatered as it passes through the nip by removing the water, the volume of which is above the Residual pore content of the Schülpen goes out, is expelled in the nip.
  • the regrind has a residual porosity of 20% and a consistency (dry) of 2.5 g / cm3, the volumetric residual water content is 20% and the water content based on mass is 9%.
  • the regrind can therefore be dewatered or dried to about 9% residual moisture in the nip.
  • the water is essentially displaced to the sides and - seen in the direction of the current - back.
  • the water that is pushed back increases the moisture of the incoming material.
  • the laterally emerging water or sludge flows are separated by the blades 10 arranged immediately below the nip from the leg strand 9 in order to avoid rewetting it.
  • the water adhering to the rollers 2, 3 is removed by the scraper bars 11, 12, 13 and discharged from the water collecting box 7 together with the water removed via the cutting edges 10 (arrow 18).
  • the conveying member 14 which is designed as a sieve, serves to drain liquid which is located on the outside of the strand 9.
  • the screw 4 serves the purpose of forcibly feeding regrind that would slip through the roller gap at a high roller speed or would only be poorly fed into the roller gap and thus enable high throughput even with such material (for example very moist coal) in the first place. Furthermore, however, the screw 4 serves the special purpose of ensuring, over a wide variation range of the throughput, that the grinding action and thus the product quality remains constant within narrow limits.
  • a device (not illustrated) which, when the throughput is changed, simultaneously changes the rotational speed of the roller mill and the rotational speed of the screw in such a way that the peripheral speed of the rollers changes in proportion to the mass flow force-fed by the screw. If the grinding force is kept constant at the same time (i.e. the force with which the movable roller 3 is pressed in the direction of the fixedly arranged roller 2), the scale thickness and the comminution conditions and thus also the product quality remain constant.
  • the throughput (mass flow) M results from the following relationship
  • the specific throughput m is defined as follows the following relationship can be derived from (1) and (2)
  • the speed of the screw 4 is changed so that the mass flow M forcibly fed by the screw changes in proportion to the peripheral speed u of the rollers.
  • the specific throughput m thus remains constant, as follows from (2). However, the shoulder thickness s remains unchanged, cf. (3).
  • the ratio of grinding force / specific throughput is a parameter to be kept constant for the respective regrind, which is a measure of the energy requirement for the desired degree of comminution.
  • the combined control of screw and roller speed thus ensures that the product properties can be kept constant and controllable, even if the properties of the millbase, such as the task, grain size, hardness, grindability, composition, moisture, etc., change.

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

Claims (7)

1. Procédé de fragmentation d'une matière à broyer au moyen de deux cylindres (2, 3) serrés l'un contre l'autre sous haute pression, caractérisé par les particularités suivantes:
a) la matière à broyer est dirigée de manière contrôlée ou forcée en un flux massique (M) réglable dans le jeu séparant les cylindres;
b) pour faire varier le débit avec une fragmentation constante,
bi) la vitesse circonférentielle (u) des cylindres subit une variation proportionnelle au flux massique (M) arrivant de manière contrôlée ou forcée, b2) et, simultanément, la force de broyage est maintenue à une valeur constante.
2. Procédé selon la revendication 1, en particulier pour l'assèchement et la fragmentation simultanés d'une matière à broyer très humide, caractérisé en ce que la matière à broyer est soumise également à une précompression lorsqu'elle est amenée de manière contrôlée dans le jeu séparant les cylindres.
3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comprenant:
a) un broyeur (1) d'un lit de matière, qui comporte deux cylindres (2, 3) serrés l'un contre l'autre sous haute pression, caractérisé par:
b) une installation, formée avantageusement d'une ou de plusieurs vis sans fin (4), d'alimentation contrôlée ou forcée du jeu séparant les cylindres en matière à broyer en un flux massique (M) réglable.
4. Dispositif selon la revendication 3, caractérisé par:
c) une installation destinée à faire varier simultanément la vitesse du broyeur à cylindres (1) et celle de la vis sans fin (4) de manière que la vitesse circonférentielle (u) des cylindres (2, 3) varie proportionnellement au flux massique (M) amené de manière contrôlée ou forcée par la vis fin (4),
d) une installation destinée à maintenir la force de broyage à une valeur constante.
5. Dispositif selon la revendication 4, destiné à l'assèchement et à la fragmentation simultanés d'une matière à broyer très humide, caractérisé en ce que des couteaux (10), dont la position est de préférence réglable, sont prévus immédiatement sous le jeu séparant les cylindres afin de séparer le liquide exprimé de la matière à broyer de la matière ayant subi la fragmentation et sortant du jeu séparant les cylindres sous forme d'une nappe de matière en grains (9).
6. Dispositif selon la revendication 5, caractérisé en ce que des racles (11, 12, 13) d'enlèvement du liquide entraîné par les cylindres (2, 3) et exprimé de la matière de broyer sont prévues sur les côtés extrêmes et sur la circonférence des cylindres (2, 3).
7. Dispositif selon les revendications 5 et 6, caractérisé en ce qu'un organe (14) de transport de la matière ayant subi la fragmentation et l'assèchement, qui est perméable aux liquides et a de préférence la forme d'un tamis sans fin, est prévu du côté de la sortie du jeu séparant les cylindres.
EP86108468A 1985-07-19 1986-06-20 Procédé et dispositif de broyage de matière à broyer Expired EP0208947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3525935 1985-07-19
DE19853525935 DE3525935A1 (de) 1985-07-19 1985-07-19 Verfahren und anlage zur zerkleinerung von mahlgut

Publications (3)

Publication Number Publication Date
EP0208947A2 EP0208947A2 (fr) 1987-01-21
EP0208947A3 EP0208947A3 (en) 1987-08-26
EP0208947B1 true EP0208947B1 (fr) 1989-03-08

Family

ID=6276264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108468A Expired EP0208947B1 (fr) 1985-07-19 1986-06-20 Procédé et dispositif de broyage de matière à broyer

Country Status (9)

Country Link
US (1) US4709864A (fr)
EP (1) EP0208947B1 (fr)
JP (1) JPS6227049A (fr)
KR (1) KR900005174B1 (fr)
BR (1) BR8603401A (fr)
CA (1) CA1280733C (fr)
DE (2) DE3525935A1 (fr)
ES (1) ES2000924A6 (fr)
IN (1) IN166964B (fr)

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DD268891A1 (de) * 1987-02-19 1989-06-14 Dessau Zementanlagenbau Veb Verfahren zur vor- bzw. feinzerkleinerung mineralischer rohstoffe in einer walzenmuehle
US4932595A (en) * 1989-02-22 1990-06-12 John Brown Inc. Size reduction system for plastic articles
IT223042Z2 (it) * 1990-05-16 1995-06-09 Dario Toncelli Dispositivo per controllare le aggregazioni di un impasto di lapidei eleganti per la produzione di pietra agglomerata
DE4028015A1 (de) * 1990-09-04 1992-03-05 Krupp Polysius Ag Verbesserung des einzugsverhaltens einer walzenmuehle
TW466136B (en) * 2000-01-28 2001-12-01 F L Smidth & Amp Co As Method and apparatus for grinding of particulate material
AUPR306101A0 (en) * 2001-02-13 2001-03-08 Oldenburg Australasia Pty Ltd An improved crushing method
CA2585345C (fr) * 2004-10-22 2013-01-29 Technological Resources Pty. Limited Broyage de materiau
DE102006032362A1 (de) * 2006-07-13 2008-01-17 Khd Humboldt Wedag Gmbh Rollenpresse insbesondere zur Gutbettzerkleinerung
DE202009014079U1 (de) * 2009-10-17 2009-12-31 Khd Humboldt Wedag Gmbh Rollenpresse mit Vorrichtung zum Vorverdichten des Mahlgutes
CN104258951A (zh) * 2014-08-27 2015-01-07 梧州市旺捷机械制造有限公司 涂料粉碎机
KR102142265B1 (ko) 2015-10-19 2020-08-10 콜드 제트 엘엘씨 블래스트 매체 분쇄기
CN105289812A (zh) * 2015-11-24 2016-02-03 全友家私有限公司 一种用于开料后板件边料的自动进料边料破碎系统
WO2019159119A1 (fr) * 2018-02-15 2019-08-22 Flsmidth A/S Mécanisme et procédé d'alimentation de dispositif de broyage
CN109939783A (zh) * 2019-04-17 2019-06-28 武汉耐恩贝有色金属科技有限公司 一种电子废料再利用回收黄金的设备及方法
CN111437913A (zh) * 2020-03-27 2020-07-24 苏州耀水源环境科技有限公司 一种混凝土废料破碎处理装置
CN112337628A (zh) * 2020-11-26 2021-02-09 湖北省金谷药业有限公司 一种红曲发酵料粉碎装置
CN116474871B (zh) * 2023-05-05 2023-09-19 哈尔滨工业大学 一种可对研磨速率和力度进行调节的骨料研磨机

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Also Published As

Publication number Publication date
JPH0323216B2 (fr) 1991-03-28
DE3525935A1 (de) 1987-01-29
ES2000924A6 (es) 1988-04-01
KR900005174B1 (ko) 1990-07-20
DE3662235D1 (en) 1989-04-13
JPS6227049A (ja) 1987-02-05
EP0208947A2 (fr) 1987-01-21
CA1280733C (fr) 1991-02-26
BR8603401A (pt) 1987-02-24
EP0208947A3 (en) 1987-08-26
KR870000964A (ko) 1987-03-10
US4709864A (en) 1987-12-01
IN166964B (fr) 1990-08-11

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