EP0164512A1 - Procédé et installation de broyage - Google Patents

Procédé et installation de broyage Download PDF

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Publication number
EP0164512A1
EP0164512A1 EP85103697A EP85103697A EP0164512A1 EP 0164512 A1 EP0164512 A1 EP 0164512A1 EP 85103697 A EP85103697 A EP 85103697A EP 85103697 A EP85103697 A EP 85103697A EP 0164512 A1 EP0164512 A1 EP 0164512A1
Authority
EP
European Patent Office
Prior art keywords
nozzle ring
air
mill
coarse
constituents
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
EP85103697A
Other languages
German (de)
English (en)
Other versions
EP0164512B1 (fr
Inventor
Heinrich Dipl.-Ing. Henne
Lutz Thomas Dipl.-Ing. Schneider
Karl-Heiz Dipl.-Ing. Dammertz
Gotthard Dipl.-Ing. Blasczyk
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
Family has litigation
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Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0164512A1 publication Critical patent/EP0164512A1/fr
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Publication of EP0164512B1 publication Critical patent/EP0164512B1/fr
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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • 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
    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Definitions

  • the invention relates to a grinding method according to the preamble of claim 1 and a plant for performing this method.
  • Ring mills are known in particular in the form of roller mills or ball ring mills.
  • the grinding tools which are designed as balls or rollers, roll on an annular grinding plate, the grinding pressure being generated by spring force, hydraulic cylinders, by centrifugal force or by the weight of the grinding tools.
  • an air stream is fed through a nozzle ring which is arranged in a fixed manner on the outer circumference of the grinding plate and which detects and carries up the fine constituents of the comminuted ground material discharged over the edge of the grinding plate, and carries the coarse constituents downward through the nozzle ring against the air flow fall and, for example, are re-fed to the mill via a mechanical conveyor.
  • the invention is therefore based on the object of designing a grinding process of the type required in the preamble of claim 1 (i.e. using an annular mill) in such a way that at least two finished products of different fineness are produced simultaneously in a simple manner.
  • At least two finished products of different fineness are produced simultaneously using the same ring mill (roller or ball ring mill), for example a fine finished product with a grain size between 0 and 100 microns and a coarse finished product with a grain size of 0.1 to 2 mm .
  • a ring mill roll or ball ring mill
  • a fine finished product with a grain size between 0 and 100 microns and a coarse finished product with a grain size of 0.1 to 2 mm .
  • the coarse constituents of the ground material which have precipitated through the nozzle ring and are conveyed up by means of a mechanical conveying device are then subjected to a reclassification (sieving or classifying) in the grinding process according to the invention, at least a partial fraction of the coarse constituents being withdrawn as a further finished product and the residual fraction containing the coarsest constituents again the mill can be abandoned.
  • a reclassification sieving or classifying
  • the grinding system shown in FIG. 1 contains a roller mill 1 with a static classifier 2 arranged above it, a bucket elevator 3, a sieve device 4 and an electrostatic filter 5.
  • roller mill 1 The details of the roller mill 1, insofar as they are essential for the understanding of the invention, are first explained in more detail with reference to FIGS. 2 and 3.
  • the roller mill 1 schematically illustrated in FIGS. 1 and 2 contains an annular grinding plate 12 rotating about a vertical axis 11 roll the two pairs of rollers 13, 14.
  • a stationary nozzle ring 15 which serves to supply an air flow (see arrow 38 in FIG. 3) which detects the fine constituents of the crushed ground material discharged over the edge of the grinding plate 12 and carries it upwards (Arrow 39), while the coarse constituents of the ground material fall downward against the air flow through the nozzle ring 15 (arrow 40).
  • the nozzle ring 15 is divided into several segments, of which the segment 15a is illustrated in detail in FIG.
  • the segment 15a of the nozzle ring 15 contains an inner stationary wall part 16, which is connected to the housing 19 of the roller mill 1 via two lateral guide parts 17, 18.
  • the stationary inner wall part 16 carries a number of webs 16a which point outwards.
  • segment 15a of the nozzle ring 15 contains an outer adjustable wall part 20 which is connected to the push spindle 21 of a pneumatic cylinder 22.
  • the thrust spindle 21 is guided radially in slide guides 23, 24.
  • the pneumatic cylinder 22 is carried by a flange 25 which is fastened to the housing 19 by means of struts 26, 27.
  • the outer wall part 20 of the segment 15a of the nozzle ring 15 is adjustable by means of the spindle 21 of the pneumatic cylinder 22 in the radial direction (double arrow 28), namely between a radially outer position in which the wall part 20 is located near the housing 19 and one Position 20 'indicated by dashed lines, in which the adjustable wall part 20 touches the struts 16a of the stationary inner wall part 16 and in which it limits the clear cross section of the interior 29 of the segment 15a through which the air flows.
  • the adjustable wall part 20 of the segment 15a is guided in the region of the ends facing the adjacent segments on parallel guide surfaces 17a, 18a of the guide parts 17, 18.
  • a link guide can be provided in the area of these guide surfaces 17a, 18a in order to exclude the risk of the adjustable outer wall part 20 tilting with respect to a horizontal plane.
  • the fresh material to be ground from the roller mill 1 is fed in via a conveyor belt 41 and a chute 42.
  • the air supply to the roller mill 1 takes place via a line 43 which is divided into sub-lines 43a, 43b and which is connected to a suitable hot air source.
  • the coarse constituents of the ground material precipitating through the nozzle ring 15 reach the bucket elevator 3 via a line 44 and are fed by this to the screening device 4.
  • At least one partial fraction resulting from the reclassification of the coarse constituents in the screening device 4 (for example the semolina with a grain size between 0 and 4 mm) is drawn off as a finished product (arrow 45), while the residual fraction containing the coarsest constituents (arrow 46) again Mill 1 is fed.
  • the fine constituents discharged pneumatically upward from the mill 1 by the air flow are subjected to a sifting in the static sifter 2.
  • the fine constituents leaving the classifier 2 with the air stream are separated in the electrostatic filter 5 as a further finished product (arrow 47).
  • the grains separated in the classifier 2 can be re-fed to the grinding table 12 of the roller mill 1 in the usual way via the separating funnel 48.
  • a selectable portion of this semolina separated in the sifter 2 can be drawn off by a discharge device 49 (for example a screw conveyor) connected to the separating funnel 48 and can also be fed to the bucket elevator 3 via a line 50.
  • a discharge device 49 for example a screw conveyor
  • the diagram according to FIG. 5 explains the relationship between the flow conditions in the nozzle ring and the quantity and fineness of the material falling down through the nozzle ring and conveyed upwards via the bucket elevator.
  • the ordinate of the diagram according to FIG. 5 shows the quantity of material in bucket elevator 3 (expressed as a percentage of the quantity of fresh material to be fed into the mill).
  • the specific air volume in the nozzle ring is plotted on the abscissa of the right part of the diagram (expressed in m 3 / kg fresh material mill feed quantity).
  • the abscissa of the left part of the diagram according to Fig. 5 corresponds to the fineness of the bucket elevator material (expressed in percent residue on a sieve with x mm mesh size). The estate becomes coarser to the left and finer to the right.
  • the two curves in the right part of the diagram show the conditions for two different air velocities V 1 and V 2 in the nozzle ring (where V 1 ⁇ V 2 ). It can be seen that as the specific amount of air in the nozzle ring increases, the amount of material in the bucket elevator decreases. If the air speed in the nozzle ring increases while the specific air volume remains the same, the amount of bucket material is also reduced.
  • the characteristic curve field in the left part of the diagram is assigned to the two curves in the right part of the diagram. So it can be changed by changing the air speed in the nozzle ring and the specific Air volume achieve different quantities of material in the bucket elevator ("nozzle ring diarrhea") with different grain spectrum.
  • the air velocity prevailing in the nozzle ring is primarily influenced by adjusting the outer wall parts 20 of the nozzle ring
  • the amount of air supplied to the nozzle ring can be influenced, for example, by adjusting a delivery blower and / or by adjusting adjusting flaps provided in the air feeds to the nozzle ring.
  • FIG. 4 shows an embodiment in schematic form, in which four air inlets 60, 61, 62, 63 are provided, to which separately adjustable segments 15'a, 15'b, 15'c and 15'd of a nozzle ring 15 'are assigned.
  • These four segments of the nozzle ring 15 ' have, as in the exemplary embodiment already explained with reference to FIGS. 2 and 3, a wall which is adjustable from the outside during operation and which limits and through the clear cross section of the nozzle ring whose adjustment can thus change the flow conditions of the air in the area of the segment concerned.
  • the devices for adjusting the cross section of the nozzle ring are likewise not illustrated in FIG.
  • adjusting flaps 64 to 67 are provided, which permit a more or less severe throttling of the air flows supplied.
  • the air supplied by the air supply lines 60 to 63 is distributed in the manner schematically indicated by the arrows over the circumferential length of the segments 15'a to 15'd of the nozzle ring 15 '.
  • the circumferential zones of the grinding plate assigned to the individual segments 15'a to 15'd of the nozzle ring 15 ' can be ventilated differently (with regard to the flow quantities and flow velocities), which is due to the different material accumulation in the individual Zones enables an optimization of the pneumatic material discharge or of the coarse material falling downwards against the air flow through the nozzle ring.
  • outer wall parts 20 of the individual segments of the nozzle ring 15 are adjustable by means of pneumatic cylinders 22, within the scope of the invention an adjustment can also be actuated by an electric or hydraulic drive or by means of a handwheel Spindle are provided.
  • the number of elements of the nozzle ring 15, each provided with a separate drive, ventilated and adjustable, is adapted to the respective application.
  • the nozzle ring can also contain individual non-ventilated segments between ventilated and adjustable segments. For example, a version with eight ventilated, adjustable segments and four non-ventilated segments arranged between them is conceivable.
  • the air speed in the nozzle ring is between 30 and 60 m / s, preferably between 35 and 45 m / s in the grinding process according to the invention.
  • the amount of coarse constituents falling through the nozzle ring and conveyed up again by the mechanical conveying device is 25 to 200%, preferably 30 to 80%, of the amount of the mill freshly abandoned good.
  • the specific amount of air in the nozzle ring is between 0.5 and 4 m 3 / kg, preferably between 0.8 and 2 m 3 / kg, of the material freshly fed to the mill.
  • the coarse constituents falling down through the nozzle ring or the partial fractions obtained in the final classification and used as finished product can, if necessary, be subjected to post-drying, for which purpose, for example, a riser dryer, a spreading dryer or a drying drum can be used.
  • the flow conditions in the nozzle ring can be changed not only in the manner described by adjusting a wall that limits the cross section of the nozzle ring, by adjusting flaps in the air supply lines and by adjusting a delivery blower, but also, for example, by partially covering the nozzle ring or by partial ventilation or partially different ventilation of the nozzle ring.
  • roller mill used in the context of the grinding process according to the invention for the simultaneous production of at least two finished products can, of course, also be used in a conventional manner to produce a single finished product, the devices for influencing The air volume and air speed in the nozzle ring allow the mill to be optimally adapted to the prevailing conditions.
  • the specified performance is based on dry product. Effectively, the feed performance due to the water contained - depending on the feed moisture - is higher.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP85103697A 1984-05-16 1985-03-27 Procédé et installation de broyage Expired EP0164512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843418197 DE3418197A1 (de) 1984-05-16 1984-05-16 Mahlverfahren sowie mahlanlage
DE3418197 1984-05-16

Publications (2)

Publication Number Publication Date
EP0164512A1 true EP0164512A1 (fr) 1985-12-18
EP0164512B1 EP0164512B1 (fr) 1986-12-17

Family

ID=6236027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103697A Expired EP0164512B1 (fr) 1984-05-16 1985-03-27 Procédé et installation de broyage

Country Status (4)

Country Link
US (1) US4927086A (fr)
EP (1) EP0164512B1 (fr)
DE (2) DE3418197A1 (fr)
ES (1) ES8607055A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610000A3 (fr) * 1993-02-04 1995-02-01 Smidth & Co As F L Procédé de traitement de matières pulvérulentes.
FR2746329A1 (fr) * 1996-03-22 1997-09-26 Fcb Procede et installation pour la production simultanee et en continu de plusieurs fractions granulometriques d'une matiere minerale
EP0979675A1 (fr) 1998-08-11 2000-02-16 Loesche Gmbh Procédé et installation de broyage de matières premières
CN102861655A (zh) * 2012-09-23 2013-01-09 湖南美鑫有机天然植物科技开发有限公司 一种精细甘草粉的硬压式研磨方法
CN102861650A (zh) * 2012-09-20 2013-01-09 湖南美鑫有机天然植物科技开发有限公司 强力硬压式甘草磨粉组合机
WO2013143565A1 (fr) * 2012-10-17 2013-10-03 Loesche Gmbh Procédé et dispositif destinés à broyer des matières humides
CN107803264A (zh) * 2017-11-08 2018-03-16 赵东生 一种扰动增强粉碎与表面改性的设备
LU103197B1 (de) * 2023-09-21 2025-03-21 Thyssenkrupp AG Vertikalrollenmühle
WO2025061554A1 (fr) 2023-09-21 2025-03-27 thyssenkrupp Polysius GmbH Laminoir centrifuge vertical

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801229A1 (de) * 1988-01-18 1989-07-27 Krupp Polysius Ag Mahlverfahren sowie mahlanlage
DE4002867C1 (fr) * 1990-02-01 1991-08-29 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De
DE4124416A1 (de) * 1991-07-23 1993-01-28 Krupp Polysius Ag Einrichtung und verfahren zur zerkleinerung von mahlgut unterschiedlicher koernung
US5251826A (en) * 1992-03-13 1993-10-12 Pennsylvania Crusher Corporation Tumbling media mill and control system
US5667149A (en) * 1995-07-03 1997-09-16 Foster Wheeler Energy Corporation Solids pulverizer mill and process utilizing interactive air port nozzles
US6213415B1 (en) 1999-09-13 2001-04-10 W.R. Grace & Co.-Conn. Process for improving grinding of cement clinker in mills employing rollers
FI4856U1 (fi) * 1999-12-08 2001-03-12 Roxon Oy Sovitelma liikkuvassa murskauslaitteessa
DE102011014592A1 (de) * 2011-03-21 2012-09-27 Loesche Gmbh Wälzmühle
DE102014014945A1 (de) * 2014-10-09 2016-04-14 Micro Impact Mill Limited Vorrichtung und Verfahren zum Erzzerkleinern mit einer hydraulischen Federeinrichtung
WO2018016104A1 (fr) * 2016-07-21 2018-01-25 株式会社Ihi Broyeur à rouleaux vertical

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH435940A (de) * 1964-02-27 1967-05-15 Georg Claes Fa Anlage zum Mahlen eines Rohstoffes für die Zementindustrie

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523881A (en) * 1921-03-17 1925-01-20 Blanton Kreutzberg Company Pulverizing apparatus
DE719987C (de) * 1938-10-08 1942-04-24 Carbo Union Ind Mij Nv Federrollenmuehle
DE818721C (de) * 1949-05-11 1952-08-04 Ernst Guenter Loesche Federrollenmuehle
AT189039B (de) * 1954-05-18 1957-02-25 Combustion Eng Federrollenmühle
US3491954A (en) * 1966-03-22 1970-01-27 Riley Stoker Corp Air flow regulator for a pulverizer
US3951347A (en) * 1972-09-21 1976-04-20 Polysius Ag Apparatus for crushing material containing particles that are hard to pulverize
DD106953A1 (fr) * 1973-10-09 1974-07-12
DD127023B1 (de) * 1976-07-28 1982-03-31 Karl Hoeffl Mahlanlage zur feinzerkleinerung von mineralien
US4240586A (en) * 1978-12-21 1980-12-23 Evans Robert F Method and apparatus for crushing and classifying particulate material
GB2118457B (en) * 1982-04-13 1985-05-22 Smidth & Co As F L Edge runner mills

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH435940A (de) * 1964-02-27 1967-05-15 Georg Claes Fa Anlage zum Mahlen eines Rohstoffes für die Zementindustrie

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610000A3 (fr) * 1993-02-04 1995-02-01 Smidth & Co As F L Procédé de traitement de matières pulvérulentes.
FR2746329A1 (fr) * 1996-03-22 1997-09-26 Fcb Procede et installation pour la production simultanee et en continu de plusieurs fractions granulometriques d'une matiere minerale
WO1997035665A1 (fr) * 1996-03-22 1997-10-02 Fcb Procede et installation pour la production simultanee et en continu de plusieurs fractions granulometriques d'une matiere minerale
US6042032A (en) * 1996-03-22 2000-03-28 Fcb Societe Anonyme Method and apparatus for simultaneously and continuously producing a plurality of size fractions of a mineral material
EP0979675A1 (fr) 1998-08-11 2000-02-16 Loesche Gmbh Procédé et installation de broyage de matières premières
CN102861650A (zh) * 2012-09-20 2013-01-09 湖南美鑫有机天然植物科技开发有限公司 强力硬压式甘草磨粉组合机
CN102861655A (zh) * 2012-09-23 2013-01-09 湖南美鑫有机天然植物科技开发有限公司 一种精细甘草粉的硬压式研磨方法
WO2013143565A1 (fr) * 2012-10-17 2013-10-03 Loesche Gmbh Procédé et dispositif destinés à broyer des matières humides
CN107803264A (zh) * 2017-11-08 2018-03-16 赵东生 一种扰动增强粉碎与表面改性的设备
CN107803264B (zh) * 2017-11-08 2019-06-18 赵东生 一种扰动增强粉碎与表面改性的设备
LU103197B1 (de) * 2023-09-21 2025-03-21 Thyssenkrupp AG Vertikalrollenmühle
WO2025061554A1 (fr) 2023-09-21 2025-03-27 thyssenkrupp Polysius GmbH Laminoir centrifuge vertical

Also Published As

Publication number Publication date
US4927086A (en) 1990-05-22
DE3418197A1 (de) 1985-11-21
ES8607055A1 (es) 1986-06-01
EP0164512B1 (fr) 1986-12-17
DE3560030D1 (en) 1987-01-29
ES543135A0 (es) 1986-06-01

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