EP1640070A1 - Installation et procédure de fragmentation du produit de passage à la meule - Google Patents

Installation et procédure de fragmentation du produit de passage à la meule Download PDF

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Publication number
EP1640070A1
EP1640070A1 EP05018192A EP05018192A EP1640070A1 EP 1640070 A1 EP1640070 A1 EP 1640070A1 EP 05018192 A EP05018192 A EP 05018192A EP 05018192 A EP05018192 A EP 05018192A EP 1640070 A1 EP1640070 A1 EP 1640070A1
Authority
EP
European Patent Office
Prior art keywords
coarse
classifier
fine
grinding
grinding chamber
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
EP05018192A
Other languages
German (de)
English (en)
Other versions
EP1640070B1 (fr
Inventor
Franz-Josef Zurhove
Karl-Heinz Alker
Jens Reimers
Ludwig KÖNNING
Reinhard Giesemann
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
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
Application filed by Polysius AG filed Critical Polysius AG
Publication of EP1640070A1 publication Critical patent/EP1640070A1/fr
Application granted granted Critical
Publication of EP1640070B1 publication Critical patent/EP1640070B1/fr
Expired - Fee Related 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
    • 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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/1835—Discharging devices combined with sorting or separating of material
    • B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
    • B02C17/1845—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone with return of oversize material to crushing 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
    • 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
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator

Definitions

  • the invention relates to a system and a method for comminuting material to be ground with a coarse classifier, a fine classifier and a tube mill consisting of at least one coarse grinding chamber having Grobmahl Scheme and at least one fine grinding chamber having fine grinding range.
  • tube mills in particular ball mills
  • dynamic or static classifier are used to separate from a good flow of fine material, which already has the desired product fineness, from coarse material content.
  • the material to be crushed is crushed in the grinding process of the MahlSystem subung inside the grinding chambers, being used as a grinding body both spherical and rod or rod-like body.
  • MahlSystem the effective use of grinding media of different geometrical design, in particular the use of different diameters in spherical grinding media, is possible.
  • the individual grinding chambers can also have different Mahl emotions alternllungsgrade.
  • the partition walls used to separate the chambers are permeable to the material to be ground and retain the grinding media.
  • a tube mill with a coarse grinding chamber and a fine grinding chamber and an intermediate wall which has an inner, vertical screen wall.
  • the coarse material produced in front of the screen wall is conveyed back via lifting elements and a cone directly in front of the intermediate wall into the coarse grinding chamber.
  • the coarse material is thus not discharged from the mill and / or transported back to the beginning of the coarse grinding chamber.
  • a disadvantageous feature of this technique is the Accumulation of coarse material directly in front of the intermediate wall and the resulting short residence time of the returned coarse material in the coarse grinding chamber.
  • the residence time of the recycled coarse material is determined by the total amount of circulating regrind, which is the sum of fresh material, reformergrie touch and coarse material of the wall.
  • the energy efficiency of the grinding and the quality characteristics of the classifier fines are known to depend on the amount of grinding material circulating. A large part of the efficiency gained by limiting the maximum particle size in the fine grinding chamber is lost again due to this circulating limitation.
  • the quality parameters of the material to be grounded which are influenced by the particle size distribution, can not be used due to the greatly limited manipulated variable "grinding material circulation volume".
  • the coarse grinding range is divided into two coarse grinding chambers, wherein the material comminuted in the coarse grinding range is fed to a sieve for rough classification.
  • the coarse material of the sieve is returned to the coarse grinding area, while the fine good of the sieve is given to an air separator.
  • the fine material of the separator is discharged as finished product, while the coarse material is fed via a cooler to the fine grinding range of the tube mill.
  • the material further comminuted in the fine grinding area is then directly fed to the separator.
  • the coarse grinding area is divided into two coarse grinding chambers in order to keep as small as possible in particular the first coarse grinding chamber, which has the lowest grinding economy.
  • the efficiency is, however, reduced by the fact that the fresh material and the entire rough good of the screen is first given up these first roughing chambers.
  • the use of a sieve does not allow regulation of the quantity distribution of screen coarse and Siebfeingut. For changes in the amount of fresh goods or the fresh grain size distribution the grinding stock filling level of both the coarse and fine grinding chambers, which is essential for efficient comminution, can not be ensured. While one mill area is overfilled, the other area is empty.
  • the invention is therefore based on the object of further improving the plant and the method for comminuting regrind with a coarse classifier, a fine classifier and a tube mill with regard to the energy efficiency. Another object is to increase the flexibility of the process for producing different products.
  • the plant according to the invention for comminuting regrind with a coarse classifier, a fine classifier and a tube mill consists essentially of a coarse grinding area having at least one coarse grinding chamber and a fine grinding area having at least one pulverising chamber, wherein the millbase of the two grinding areas is wholly or partly fed to the coarse classifier and at least one Part of the fine material of the coarse classifier is given to the fine classifier and wherein the coarse material of the coarse classifier of the coarse grinding chamber and the coarse material of the fine classifier is at least fed to the fine grinding chamber, while the fine material of the fine classifier is discharged as finished goods.
  • the coarse grinding range is designed such that less than 25% of the introduced drive power of the tube mill is converted in the coarse grinding range.
  • the plant according to the invention for comminuting regrind with a coarse classifier and a fine classifier and a tube mill consists essentially of a coarse grinding area having at least one coarse grinding chamber and a fine grinding area having at least one pulverising chamber, wherein the millbase of the two refining areas is wholly or partly fed to the coarse classifier and at least part of the coarse class fine material is given to the fine classifier and wherein the coarse material of the coarse classifier of the coarse grinding chamber and the coarse material of the fine classifier is at least fed to the fine grinding chamber while the fine material of the fine classifier is discharged as finished product, wherein the ratio of length to inside diameter of the coarse grinding range is in a range of 0.3 to 0.7.
  • the inventive method for comminution of material to be ground with a coarse classifier, a fine classifier and a tube mill comprising a coarse grinding range having at least one coarse grinding chamber and a fine grinding range having at least one fine grinding chamber is characterized in that the grinding material of the two grinding regions is wholly or partly fed to the coarse classifier and at least a part of the fine material of the coarse classifier is given to the fine classifier and wherein the coarse material of the coarse classifier of the coarse grinding chamber and the coarse material of the fine classifier is at least fed to the fine grinding chamber, while the fine material of the fine class is discharged as finished goods.
  • less than 25% of the introduced drive power of the tube mill is converted in the rough grinding range.
  • a further increase in the energy efficiency can be achieved if the coarse grinding range is designed such that less than 22%, preferably less than 20% of the introduced drive power of the tube mill is converted in the coarse grinding range.
  • an increase can be achieved in that the ratio of length to inner diameter of the coarse grinding range is in a range of 0.3 to 0.6, preferably in a range of 0.3 to 0.5.
  • the separating cut of the two classifiers is adjustable.
  • a targeted control of Mahlguthellungsgrades be guaranteed in all grinding chambers even with variations in the grindability and particle size distribution of the fresh material.
  • means are provided to supply at least a portion of the fresh material to the coarse classifier. In this way, even a sufficiently fine component of the fresh material can be abandoned under the environment of the coarse grinding chamber equal to the fine grinding chamber. In addition, it is possible to dry any moist fresh material in the coarse classifier by using hot gases.
  • a further improvement can be achieved by providing means for feeding a part of the coarse material of the fine classifier to the coarse grinding chamber.
  • a divider can be arranged to divide the coarse material of the fine classifier in a first and a second partial flow, wherein the first partial flow to the coarse grinding chamber and the second partial flow is passed to the fine grinding chamber.
  • the mill shown in Fig. 1 for crushing regrind consists essentially of a tube mill 1, a coarse classifier 2 and a fine classifier 3.
  • the tube mill is divided into a Grobmahlhunt having a Grobmahlhunt 1.1 and a Feinmahlhunt 1.2 having fine grinding range.
  • a center discharge 1.3 is provided, from which part of the ground material of both grinding areas with the mill air 4 is pneumatically discharged and the other part 5.1 by means of gravity.
  • the granulated material 5.1 discharged by gravity is given to the coarse classifier 2.
  • the amount of gas of the coarse or fine grinding chamber can be controlled separately via suitable, not shown throttle at the entrance of the chambers.
  • Frischgut 5 can either the coarse grinding chamber 1.1 or partially or preferably completely abandoned together with the discharged regrind 5.1 the coarse classifier 2.
  • the coarse classifier 2 is formed by either a static or a dynamic classifier.
  • the fine material 5.2 of the coarse classifier 2 is the fine classifier 3 abandoned while the coarse material 5.3 of the coarse classifier 2 of the coarse grinding chamber 1.1 is fed and crushed there.
  • the fine classifier 3 may in turn consist of a static or preferably a dynamic classifier, with a dynamic classifier achieving higher finished product finenesses and better separating cuts.
  • the fine material 5.4 of the fine classifier 3 is discharged as finished material from the grinding plant.
  • the coarse material 5.5 of the fine classifier 3 passes completely or partially into the fine grinding chamber 1.2 by means of a divider 6.
  • the coarse material of the fine classifier 3 is divided into a first partial flow 5.5.1 and a second partial flow 5.5.2, wherein the first partial flow 5.5.1 is passed to the fine grinding chamber 1.2 and the second partial flow 5.5.2 to the coarse grinding chamber 1.1.
  • the fresh product is classified according to grain sizes, e.g. Fine fly ash and flours 5 'on the one hand and clinker and limestone 5 on the other hand, they can be wholly or partially abandoned the coarse grinding chamber or the fine grinding chamber and / or the coarse classifier or the fine classifier.
  • grain sizes e.g. Fine fly ash and flours 5 'on the one hand and clinker and limestone 5 on the other hand, they can be wholly or partially abandoned the coarse grinding chamber or the fine grinding chamber and / or the coarse classifier or the fine classifier.
  • the very finest constituents of the millbase of both mill areas are discharged via the mill air 4 and fed to the fine classifier 3. Furthermore, it is provided that the remaining remainder of the ground material of both grinding areas is discharged separately from one another.
  • the material to be grounded 5.1.1 of the coarse grinding chamber 1.1. to the coarse classifier 3 while the material to be ground 5.1.2 of the fine grinding chamber of 1.2 the fine classifier 3 is supplied.
  • the center discharge wall 1.3 is divided for this purpose via an internal device 1.4 into two subregions.
  • this internal device 1.4 is designed as a separating device, the finer Mahlgutanteil from the coarse grinding chamber 1.1. let pass, so that this good share equal to the fine classifier 3 arrives.
  • a divider 7 may be provided which divides the fine material 5.2 of the coarse classifier 2 into a first partial stream 5.2.1 and a second partial stream 5.2.2.
  • the first sub-stream 5.2.1 passes to the fine classifier 3, while the second Part stream 5.2.2 under the environment of the fine classifier 3 of the fine grinding chamber 1.2 is supplied.
  • the coarser fresh material 5 can be supplied wholly or partly to the coarse grinding chamber 1.1 or the coarse classifier 2, while the finer fresh product 5 'can optionally be fed to the pulverising chamber 1.2 or the fine classifier 3.
  • the coarse grinding range includes all coarse grinding chambers, which are provided before the discharge of the grinded material ground in the rough grinding range. In the illustrated embodiments, only a coarse grinding chamber is provided. But there are also several Grobmahlhunt conceivable.
  • the coarse grinding range is designed such that less than 25% of the introduced drive power of the tube mill 1 is implemented in the coarse grinding range. A further increase is possible if less than 22%, preferably less than 20% of the introduced drive power of the tube mill is carried out in the coarse grinding range.
  • the ratio of length to inner diameter of the coarse grinding range is in the range of 0.3 to 0.7, in particular between 0.3 to 0.6 and preferably between 0.3 and 0.5.
  • the coarse classifier and / or the fine classifier are subjected to hot gases, in order at the same time to effect a drying of the ground material. If, moreover, the fresh goods are at least partially abandoned to the coarse classifier, an energetic unfavorable grinding of any moist material in the coarse grinding chamber can be reliably avoided.
  • the fresh material has a high proportion of fine particles, it is advantageous if it is fed directly to the fine grinding chamber or the fine classifier under the environment of the coarse grinding chamber.
  • the fine grinding chamber can be given a grinding stock which is limited in the maximum particle size, and the grinding chamber can be given little fine grinding stock.
  • MahlSystemgattierung be fine tuned by finer grinding media on the limited particle size in the fine grinding and on the other hand, the efficiency of the coarse grinding be improved by increasing the mass fraction of large particles.
  • too large a content of fine particles deteriorates crushing efficiency, because the coarse material requires large grinding media, which causes fine particles to overstress, resulting in waste of energy.
  • the maximum particle size in the second grinding chamber can be limited and also protection against wear of the fine classifier is ensured.
  • the coarse grinding chamber can be significantly reduced in length or in the proportion of the introduced drive power of the entire tube mill compared to conventional tube mills.
  • the resulting peripheral speed can be reduced in the coarse grinding chamber by reducing the effective inner diameter.
  • the stroke effect in the coarse grinding chamber can also be reduced by a modification of the cylinder armor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Saccharide Compounds (AREA)
  • Fertilizers (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP05018192A 2004-09-22 2005-08-22 Installation et procédure de fragmentation du produit de passage à la meule Expired - Fee Related EP1640070B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004045959A DE102004045959A1 (de) 2004-09-22 2004-09-22 Anlage und Verfahren zur Zerkleinerung von Mahlgut

Publications (2)

Publication Number Publication Date
EP1640070A1 true EP1640070A1 (fr) 2006-03-29
EP1640070B1 EP1640070B1 (fr) 2009-07-08

Family

ID=35428142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05018192A Expired - Fee Related EP1640070B1 (fr) 2004-09-22 2005-08-22 Installation et procédure de fragmentation du produit de passage à la meule

Country Status (4)

Country Link
EP (1) EP1640070B1 (fr)
AT (1) ATE435701T1 (fr)
DE (2) DE102004045959A1 (fr)
DK (1) DK1640070T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102284323A (zh) * 2010-06-16 2011-12-21 坡利西斯股份公司 用于借助管磨机研磨磨料的方法
CN103611616A (zh) * 2013-11-25 2014-03-05 镇江市电站辅机厂有限公司 石灰石制粉系统
CN103721831A (zh) * 2013-07-12 2014-04-16 孙世林 干法球磨机磨内选粉装置
CN104258942A (zh) * 2014-10-17 2015-01-07 张沁玥 球磨机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114682362B (zh) * 2022-04-26 2023-09-29 中国海洋石油集团有限公司 一种岩屑回注系统及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950756A1 (de) 1978-12-29 1980-07-17 Smidth & Co As F L Verfahren und vorrichtung zum trockenen mahlen koernigen guts

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT280022B (de) * 1968-03-07 1970-03-25 Polysius Gmbh Rohrmühle zur Mahltrocknung von feuchtem Gut
FR2324367A1 (fr) * 1974-01-14 1977-04-15 Fives Cail Babcock Broyeur tubulaire rotatif a deux compartiments de broyage
FR2269376A1 (en) * 1974-04-30 1975-11-28 Fives Cail Babcock Double chamber horiz. rotary grinder - has different dia. adjacent chambers on bearings located for min. bending moments
EP1448303B1 (fr) * 2001-11-29 2008-08-27 Polysius AG Tube broyeur et procede pour broyer des produits a moudre en morceaux

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950756A1 (de) 1978-12-29 1980-07-17 Smidth & Co As F L Verfahren und vorrichtung zum trockenen mahlen koernigen guts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102284323A (zh) * 2010-06-16 2011-12-21 坡利西斯股份公司 用于借助管磨机研磨磨料的方法
CN102284323B (zh) * 2010-06-16 2014-11-26 坡利西斯股份公司 用于借助管磨机研磨磨料的方法
CN103721831A (zh) * 2013-07-12 2014-04-16 孙世林 干法球磨机磨内选粉装置
CN103611616A (zh) * 2013-11-25 2014-03-05 镇江市电站辅机厂有限公司 石灰石制粉系统
CN104258942A (zh) * 2014-10-17 2015-01-07 张沁玥 球磨机
CN104258942B (zh) * 2014-10-17 2016-05-04 张沁玥 球磨机

Also Published As

Publication number Publication date
ATE435701T1 (de) 2009-07-15
EP1640070B1 (fr) 2009-07-08
DE102004045959A1 (de) 2006-03-23
DE502005007652D1 (de) 2009-08-20
DK1640070T3 (da) 2009-10-19

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