EP3074137B1 - Verfahren zur herstellung von zement - Google Patents

Verfahren zur herstellung von zement Download PDF

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Publication number
EP3074137B1
EP3074137B1 EP14805222.8A EP14805222A EP3074137B1 EP 3074137 B1 EP3074137 B1 EP 3074137B1 EP 14805222 A EP14805222 A EP 14805222A EP 3074137 B1 EP3074137 B1 EP 3074137B1
Authority
EP
European Patent Office
Prior art keywords
cage
classifiers
bar
cement
ground
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.)
Not-in-force
Application number
EP14805222.8A
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German (de)
English (en)
French (fr)
Other versions
EP3074137A1 (de
Inventor
Jörg BINNER
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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Publication of EP3074137A1 publication Critical patent/EP3074137A1/de
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Publication of EP3074137B1 publication Critical patent/EP3074137B1/de
Not-in-force legal-status Critical Current
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    • 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 method for producing a cement, wherein at least one millbase is ground in at least two devices for grinding to different ground millbase with mutually different grain size distributions, the ground millbase separated from each of the at least two devices for grinding separately, each with its own classifying air stream is supplied to one of at least two rod sifters, in each of the at least two rod sifter classified a fine material fraction and a coarse grain fraction is discharged.
  • a device for grinding regrind For the production of cement and / or cement raw meal suitable for cement production regrind such as cement clinker, metallurgical or slag sand, limestone and / or gypsum is placed in a device for grinding regrind.
  • regrind such as cement clinker, metallurgical or slag sand, limestone and / or gypsum
  • HPGR 'high-pressure roller press'
  • the material to be removed from the roller presses consists of still existing coarse material and a fine material produced during comminution. For the production of the fine material, it is separated from the coarse material in classifiers.
  • a broadened particle size distribution can be achieved by operating at least two similar Kreislaufmahlanlagen. Differences in the roller presses used (in particular in the contact forces) and the rod basket sifters (in particular with regard to speed and dimensions) make it possible to produce different, steep particle size distributions.
  • DE 10 2008 019 830 A1 a Umkylzmahlstrom with roller press, static caution and dynamic classifier is known, it being possible to operate in parallel to increase the throughput of several similar systems.
  • WO 2009/068465 A1 is a Kreislaufmahlstrom known, which is composed of several roller presses and corresponding classifiers. With such systems, the desired grain size influencing and distribution can be achieved by bringing together the respective light goods.
  • the object of the invention is therefore to provide a method for producing a cement, which overcomes the disadvantages of the prior art.
  • At least two grinders at least one grindable material suitable for cement production is ground and that the ground grindbase suspended in separate classifying air streams is in each case supplied pneumatically to a dynamic rod basket sifter.
  • a separation of a coarse grain fraction (grits) and a fine grain fraction is achieved.
  • the grits are taken away.
  • the fine material fractions which are located in the rod basket sifters are discharged from the respective classifying air streams into a common discharge device.
  • the classifying air streams flow together.
  • the resulting flow field inside the discharge device swirls the fine material particles and leads to a uniform mixing of the fine material fractions from the individual rod basket separators.
  • the at least two devices for grinding mutually different millbase for example cement clinker, metallurgical or slag sand, limestone and / or gypsum, is supplied. If at the same time different starting materials are supplied to the devices for grinding as the respective ground material, this can influence the composition of the cement or cement raw meal.
  • roller presses As devices for grinding.
  • Operating characteristics of roller presses and the nature of the comminuted fresh produce are well known in cement production.
  • roller presses lead to steep particle size distribution curves.
  • the desired broadened particle size distribution can easily be achieved for the common fine product product.
  • two roller presses and two Stabkorbsichtern a composition of a coarser and a finer fines content in the common fines product is produced, resulting in a high strength of cement.
  • the inventive method is not limited to the use of roller presses. It is possible, in their place, to use other devices known from cement production for grinding regrind, in particular ball mills (tube mills), vertical mills and impact hammer mills. This makes it possible, not least for testing and development purposes, to carry out additional influencing of the particle size distribution in the common fine product product that is fundamentally made possible by the method according to the invention.
  • the ground material to be ground from the at least two devices for grinding is not directed directly into the dynamic rod basket sifter, but first subjected to a pre-seal.
  • the crushed regrind is in each case in a static Caution entered.
  • Caregivers are used in the process of cement production to separate coarse material located in the material to be ground. These are coarse material residues that were not crushed during the grinding process.
  • the coarse grain fractions discharged from the at least two rod basket sifters are again supplied to the devices for grinding.
  • Such a recirculation of Gr manstrags offers the known economic advantages of Kreislaufmahlanlagen.
  • the individual grinding cycles are run separately from each other, i. the coarse grain fraction from a rod basket sifter is returned to the corresponding apparatus for grinding, from which forth this Stabkorbsichter also flows the reformgut.
  • the at least two rod cage separators are separately but in only one housing. This allows an economical material cost for the housing construction of the rod basket sifter and takes up the least space for the devices for sifting.
  • two rod cage sifters are preferably coaxially stacked for dynamic reasons.
  • FIG. 1 the method according to the invention for the production of cement is shown schematically for the exemplary embodiment in which two roller presses 1, 2 are used as devices for comminuting the at least one ground material.
  • the Austragsgut from the roller presses 1, 2 is pneumatically introduced in each case with a crusher poverty 3a, 3b in the housing 6a, 6b each of a dynamic Stabkorbsichters 4, 5.
  • Each of the two rod sifter 4, 5 has its own, speed-adjustable drive 24a, 24b, which puts him about its longitudinal axis in a rotational movement.
  • Speed and direction of rotation of the two rod basket sifter 4, 5 can be controlled independently.
  • the millbase suspended in the classifying air flows laterally toward the respective rod basket classifier 4, 5 and is accelerated by the rotational movement of the rod basket classifier 4, 5 into its zone of vision.
  • the centrifugal forces acting on the particles of the prepareguts lead in cooperation with the frictional force of the air flow to a separation of the prepareguts in each case a coarse grain fraction 7, 8 (Grape) and each a fine material fraction 9, 10.
  • the coarse grain fractions 7, 8 are from the Stabkorbsichtern 4, 5 discharged due to gravity down from the respective reformzone (Gr manstrag).
  • the classified fines 9, 10 are pneumatically transported by the respective classifying air stream from the respective rod basket sifter 4, 5 and both arrive in the discharge device 11.
  • a substantial phase of the method according to the invention for the production of a cement occurs in the discharge device 11 to a club so far separate classifying air streams.
  • the merger of the classifying air flows leads to a turbulent flow dynamics in the interior of the discharge device 11. This results in a turbulence and in its consequence a uniform mixing of suspended in the classifying air streams fine material fractions 9, 10 to a homogeneous finished product with a correspondingly composed particle size distribution.
  • the separation device here a cyclone
  • the fine material 14 separated from the classifying air stream 15 can be stored in silos in the further process of cement production (not in the picture).
  • FIGS. 4a and 4b are exemplary embodiments of the inventive method for producing a cement with a roller press 1 and a ball mill 16 ( FIG. 4a ) or with a vertical mill 17 and an impact hammer mill 18 (FIG. FIG. 4b ).
  • procedures and structure are as in FIG. 1 ,
  • FIG. 2 is based on the embodiment of FIG. 1 schematically illustrates an inventive method for producing a cement, in which the Austragsgut from the roller presses 1, 2 each undergoes a Vorsichtung before it is passed into one of the rod basket classifier 4, 5.
  • the Austragsgutstrom 20a, 20b from each roller press 1, 2 is to each a static caution 21, 22, respectively.
  • the discharged into a static cauterizer 21, 22 Austragsgut is separated into this in a fraction of fines 27a, 27b of the static Beicassers 21, 22 and a coarse material fraction, which leaves on the way Grobgutab Entry 26a, 26b, the static cautery 21, 22.
  • the separated fines 27a, 27b of the static cauterizer 21, 22 is pneumatically with a classifying air stream 19a, 19b in each one of the rod basket classifier 4, 5 passed.
  • FIG. 3 is based on the embodiment of FIG. 2 an extended to a grinding cycle, inventive method for producing a cement shown.
  • the Gr maneaustrag from the Stabkorbsichtern 4, 5 each returned to the devices for grinding 1, 2.
  • the recirculation takes place separately and to the respectively corresponding roller press 1, 2:
  • the feed 25b of the coarse grain fraction takes place back to the roller press 2.
  • the roller presses 1, 2 grind the recirculated coarse grain fractions 7, 8 together with that in the fresh material feeds 23a, 23b each supplied grinding stock.
  • the Austragsgutströme 20a, 20b from the roller presses 1, 2 are each passed into the corresponding static caution 21, 22.
  • the coarse material discharge discharged into the coarse material removal lines 26a, 26b of the static cauterizers 21, 22 can - not shown in the figure - be brought together with fresh material directly or after further pre-grinding and likewise fed back into the grinding cycle by way of the fresh material feeds 23a, 23b.
  • FIG. 5 shows a detail of an embodiment of the method according to the invention, in which the two rod basket viewers 4, 5 are arranged in only one housing 6c. For dynamic reasons, a coaxial arrangement of the rod basket sifter 4, 5 is favorable, as shown.
  • the rod basket separators 4, 5 are separated from each other by the respective prepare for the production of the rod basket sifter 4, 5 .
  • the fines 9, 10 are separated from each other in the discharge 11, in which combines the classifying air streams and the two fines 9, 10 are uniformly mixed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)
EP14805222.8A 2013-11-26 2014-11-21 Verfahren zur herstellung von zement Not-in-force EP3074137B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013019840.2A DE102013019840A1 (de) 2013-11-26 2013-11-26 Verfahren zur Herstellung von Zement
PCT/EP2014/075308 WO2015078787A1 (de) 2013-11-26 2014-11-21 Verfahren zur herstellung von zement

Publications (2)

Publication Number Publication Date
EP3074137A1 EP3074137A1 (de) 2016-10-05
EP3074137B1 true EP3074137B1 (de) 2017-10-25

Family

ID=51999410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14805222.8A Not-in-force EP3074137B1 (de) 2013-11-26 2014-11-21 Verfahren zur herstellung von zement

Country Status (4)

Country Link
EP (1) EP3074137B1 (da)
DE (1) DE102013019840A1 (da)
DK (1) DK3074137T3 (da)
WO (1) WO2015078787A1 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015654B4 (de) * 2014-10-22 2016-08-11 Khd Humboldt Wedag Gmbh Anlage zum Mahlen und Sichten von Zementklinker
DE102015001404B3 (de) 2015-02-04 2016-08-04 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage mit zwei Mahlvorrichtungen und Verfahren zum Betrieb der Kreislaufmahlanlage
CN108554507A (zh) * 2018-01-16 2018-09-21 海安海太铸造有限公司 一种水泥生产中高效离心、混合设备
CN108043511A (zh) * 2018-01-16 2018-05-18 海安海太铸造有限公司 一种水泥生产物料破碎配料混合装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4334904A1 (de) * 1993-10-13 1995-04-20 Kloeckner Humboldt Deutz Ag Umlaufmahlanlage
DE10333361A1 (de) * 2003-07-23 2005-02-10 Gebr. Pfeiffer Ag Verfahren und Vorrichtung zum Herstellen von Zement
DE202007016785U1 (de) 2007-11-29 2009-04-02 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage
DE102008019830B4 (de) 2008-04-11 2019-01-24 Khd Humboldt Wedag Gmbh Umwälzmahlanlage mit außen liegenden Steigrohren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3074137A1 (de) 2016-10-05
DE102013019840A1 (de) 2015-05-28
DK3074137T3 (da) 2018-01-29
WO2015078787A1 (de) 2015-06-04

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