EP3154701B1 - Mahlanlage und verfahren zur zerkleinerung von mahlgut - Google Patents

Mahlanlage und verfahren zur zerkleinerung von mahlgut Download PDF

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Publication number
EP3154701B1
EP3154701B1 EP15726988.7A EP15726988A EP3154701B1 EP 3154701 B1 EP3154701 B1 EP 3154701B1 EP 15726988 A EP15726988 A EP 15726988A EP 3154701 B1 EP3154701 B1 EP 3154701B1
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EP
European Patent Office
Prior art keywords
separator
grinding
dynamic
roller press
static
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EP15726988.7A
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German (de)
English (en)
French (fr)
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EP3154701C0 (de
EP3154701A1 (de
Inventor
Michael Wilczek
Olaf Hagemeier
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 Polysius GmbH
ThyssenKrupp AG
Original Assignee
Thyssenkrupp Polysius GmbH
ThyssenKrupp AG
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Publication of EP3154701C0 publication Critical patent/EP3154701C0/de
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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
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers

Definitions

  • the invention relates to a grinding plant and a method for comminuting grinding material with a first grinding circuit having a roller press and a first classifier and a second grinding circuit having a dynamic classifier and a ball mill.
  • the ground material used in crushing preferably consists of a brittle material such as limestone, dolomite or ore.
  • the ground material also preferably consists of clinker, slag and/or fly ash.
  • a grinding plant with a first and a second grinding circuit is known, whereby the first grinding circuit is operated with a high-pressure roller press and a dynamic sifter arranged above it.
  • the fine material from the first grinding circuit goes into a cyclone and from there into a ball mill.
  • the material ground in the ball mill is separated into finished product and grits in a second dynamic sifter, whereby the grits are returned to the ball mill.
  • High-pressure roller presses usually have two rollers that are driven in opposite directions and form a grinding gap between them, which are subjected to grinding pressures of 50 MPa and more via a pressing device. Such high pressures lead to so-called material bed comminution in the grinding gap, which means that the crushed material to be ground comes out of the roller press partly in the form of flakes or agglomerates. In order to sift such material to be ground in a dynamic sifter, a deagglomerator is often installed upstream.
  • the deagglomerator is replaced by a static classifier.
  • a conveyor unit in particular a bucket elevator, is used, which is adapted to the quantity to be transported and causes not inconsiderable investment and operating costs.
  • the aim was to create a compact circulating grinding plant with a roller press and sifter, in which the problem of mechanical transport of the circulating ground material is minimized.
  • the solution to this problem was to arrange a static cascade sifter below the roller gap of the roller press, while a dynamic post-sifter with its coarse material outlet was provided above the roller press.
  • the static cascade sifter's main task is to deagglomerate the agglomerates and simultaneously sift the sifted material in the cross flow.
  • the sifted material discharged from the static cascade sifter is fed pneumatically into the post-sifter via a riser channel with the sifting air.
  • the invention is therefore based on the object of specifying a grinding plant and a method for comminution of grinding material with a first and a second grinding circuit, which are characterized by reduced investment and operating costs.
  • the grinding system according to the invention for comminuting grinding material consists essentially of a first grinding circuit having a roller press and a first sifter and a second grinding circuit having a dynamic sifter and a ball mill.
  • the first sifter is designed as a static sifter and is arranged below the roller press, while the dynamic sifter is provided at the level of the roller press or below the roller press.
  • a buffer storage is provided between the dynamic sifter and the ball mill. The grit from the dynamic sifter is fed to the ball mill via the buffer storage.
  • the buffer storage has an overflow connected to the first grinding circuit and/or wherein the amount of grit produced is adapted to the capacity of the ball mill by influencing the amount of fine material from the static sifter.
  • the ground material is comminuted in a first grinding circuit, which has a roller press and a first sifter, and a second grinding circuit, which has a dynamic sifter and a ball mill.
  • the first sifter is designed as a static sifter and is arranged below the roller press.
  • the dynamic sifter is arranged at the level of the roller press or below the roller press.
  • Grit from the dynamic sifter is fed to the ball mill via a buffer storage.
  • the buffer storage has an overflow connected to the first grinding circuit and/or the amount of grit produced is adapted to the capacity of the ball mill by influencing the amount of fine material from the static sifter.
  • a roller press in the sense of the invention is understood to be a roller mill with two grinding rollers driven in opposite directions and pressed against each other while maintaining a grinding gap.
  • the static classifier is characterized by The main difference between the dynamic classifier and the dynamic classifier is that it has no rotating or turning components during operation. It usually consists of a slanted ventilation base, which can also be designed in a cascade shape and through which a classifying air flow flows.
  • the dynamic classifier usually has a rotating rod basket or rotor.
  • the conveying distances in the circulation circuits can be minimized by the static classifier of the first grinding circuit arranged below the roller press and the dynamic classifier in the second grinding circuit arranged at the maximum level of the roller press.
  • the first grinding circuit further comprises a first conveying unit arranged between a coarse material outlet of the static classifier and a feed shaft of the roller press. Furthermore, a second conveying unit arranged between a discharge opening of the ball mill and a feed opening of the dynamic classifier is provided in the second grinding circuit. This connection means that only the coarse material from the static classifier is returned to the roller press.
  • the first conveying unit provided for this purpose can therefore be made smaller, which can save investment and operating costs.
  • the dynamic sifter can have a finished product outlet and a semolina outlet.
  • the grinding system according to the invention is preferably designed so that the semolina from the dynamic sifter is only fed to the ball mill.
  • the semolina should only be returned to the first grinding circuit in exceptional cases, in particular when the amount of semolina exceeds the processing capacity of the ball mill.
  • a buffer storage unit is therefore provided between the dynamic sifter and the ball mill, which has an overflow connected to the first grinding circuit.
  • the amount of semolina produced is adapted to the capacity of the ball mill by influencing the amount of fine material from the static sifter.
  • These or other measures are intended to ensure that more than 80%, preferably more than 90% or more than 95%, most preferably the entire quantity of grit is fed to the ball mill.
  • the conveying volume of the first conveying unit can be correspondingly smaller.
  • the reduced conveying volume of the first conveying unit and the reduced conveying head of the second conveying unit result in significant savings in investment and operating costs.
  • the omission of a dynamic sifter above the roller press also results in a relatively compact overall arrangement of the grinding plant.
  • a grinding plant for crushing brittle grinding material such as limestone, clinker, dolomite or ore is shown. It essentially consists of a first grinding circuit 3 with a roller press 1 and a static classifier 2 and a second grinding circuit 6 with a dynamic classifier 4 and a ball mill 5.
  • the roller press has two counter-rotating grinding rollers 1a, 1b in the usual way. The two grinding rollers are subjected to grinding pressures of 50 MPa and more via a pressing device (not shown in detail) while maintaining a grinding gap.
  • the first grinding circuit 3 also has a first conveyor unit 7, in particular a bucket elevator, arranged between a coarse material outlet 2b of the static sifter 2 and a feed shaft 1c of the roller press 1.
  • the roller press is also connected to a feed opening 2a of the static sifter 2 via an outlet opening 1d.
  • the connection between the roller press and the static sifter is expediently made via a chute 8, so that the crushed material is fed into the static sifter by gravity without any energy expenditure.
  • the grinding material (fresh material 9) to be fed into the first grinding circuit 3 is fed in the area of the chute 8 or the feed opening 2a of the static sifter 2.
  • the fresh material 9, which can already contain a certain proportion of fine material, is thus only separated into coarse material and fine material in the static sifter, so that only the coarse material is conveyed to the feed shaft 1c of the roller press 1.
  • the static classifier 2 has an obliquely arranged ventilation base 2d through which a classifying air flow 10 flows. While the coarse material follows gravity to the coarse material outlet 2b, the fine material is guided together with the classifying air flow via the fine material outlet 2c into the dynamic classifier 4.
  • the dynamic classifier 4 is designed, for example, as a rod basket classifier with a tangentially arranged inlet opening 4a.
  • the dynamic classifier The ground material supplied is sifted into semolina and finished product, with the semolina being fed to the ball mill 5 via a semolina outlet 4b.
  • the connection can be formed, for example, by a chute or, if the gradient is insufficient, as an air flow channel.
  • the finished product is fed together with the sifting air flow via a finished product outlet 4c to a separator 11, where the finished product 12 is separated from the sifting air flow 10.
  • the semolina is further crushed and then returned to the dynamic sifter 4 either via a further separator 13 or directly via a second conveyor device 14.
  • the further separator 13 can be necessary in particular if the ball mill 5 is operated with an air flow.
  • the embodiment according to Fig.2 differs from the first embodiment essentially only in that the dynamic classifier 4' of the 2nd grinding circuit 6 is arranged below the roller press 1.
  • the static classifier 2 is in turn arranged below the dynamic classifier 4'.
  • the inlet opening 4'a of the dynamic classifier 4 is this time arranged at the lower end of the classifier, so that the classifying air flow 10 flows into the dynamic classifier 4' together with the fine material from the static classifier 2 from the bottom to the top.
  • the other details of this 2nd grinding system and its mode of operation are the same as those of the first grinding system.
  • the classifier 4' can also be used instead of the classifier 4 and vice versa.
  • the two grinding systems are preferably operated in such a way that the grit produced in the dynamic classifier 4 or 4' is returned to the first grinding circuit in as small a quantity as possible, but preferably not at all (return line 15 shown in dashed lines).
  • the dynamic classifier 4 or 4' is equipped with a grit cone or a buffer storage 16 ( Fig.3 and 4 ).
  • the required amount can be fed to the ball mill 5 in a metered manner via a metering device 17, for example a cell lock or a screw.
  • the buffer storage 16 according to Fig.3 is provided with an overflow 18, which is connected to the first grinding circuit 3 via the return line 15.
  • the Return line 15 conveniently opens into the area of the first conveyor device 7.
  • the overflow 18 should only be used in exceptional cases, so that the aim is to operate the grinding system in such a way that no grit is returned to the first grinding circuit via the return line 15.
  • the amount of grit produced depends primarily on the fines content of the static sifter 2. Suitable measurements, such as a flow measurement in the area of the return line 15 to determine the returned grit mass flow or a measurement of the power consumption of the first conveyor device 7 and/or a single-roller belt scale after the first conveyor device 7 to determine the circulating mass flow of the first grinding circuit, can be used to determine whether the amount of grit produced is too large. Any necessary influence on the fines content of the static sifter can essentially be achieved by adjusting the amount of the sifting air flow 10 or regulating the amount of fresh material 9 fed in.
  • Fig.4 shows yet another variant in which a return line 15 is dispensed with.
  • the dynamic sifter is in turn equipped with a buffer storage 16, which has a level measuring device 19. If the level is too low, for example, the amount of fresh material and/or the sifting air flow 10 is increased. If the level is too high, the amount of fresh material and/or the sifting air flow 10 is reduced.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP15726988.7A 2014-06-13 2015-06-08 Mahlanlage und verfahren zur zerkleinerung von mahlgut Active EP3154701B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014108334.2A DE102014108334A1 (de) 2014-06-13 2014-06-13 Mahlanlage und Verfahren zur Zerkleinerung von Mahlgut
PCT/EP2015/062674 WO2015189131A1 (de) 2014-06-13 2015-06-08 Mahlanlage und verfahren zur zerkleinerung von mahlgut

Publications (3)

Publication Number Publication Date
EP3154701A1 EP3154701A1 (de) 2017-04-19
EP3154701C0 EP3154701C0 (de) 2024-04-10
EP3154701B1 true EP3154701B1 (de) 2024-04-10

Family

ID=53284284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15726988.7A Active EP3154701B1 (de) 2014-06-13 2015-06-08 Mahlanlage und verfahren zur zerkleinerung von mahlgut

Country Status (4)

Country Link
EP (1) EP3154701B1 (zh)
CN (1) CN106457259B (zh)
DE (1) DE102014108334A1 (zh)
WO (1) WO2015189131A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016006610A1 (de) * 2016-06-02 2017-12-07 Khd Humboldt Wedag Gmbh Schiffskreislaufmahlanlage
DE102017115994A1 (de) * 2017-07-17 2019-01-17 Thyssenkrupp Ag Zweistufiger Mahlkreislauf und Verfahren zur Herstellung eines gemahlenen Produkts mittels einer zweistufigen Mahlung
DE102018105978B3 (de) 2018-03-15 2019-04-25 Thyssenkrupp Ag Sichter und Verfahren zum Sichten eines Materialstroms sowie eine Mahlanlage
CN109569853B (zh) * 2019-01-18 2021-06-01 中材海外工程有限公司 一种球磨机和辊压机组成的联合粉磨系统
CN110354946A (zh) * 2019-08-09 2019-10-22 诸暨高宗自动化科技有限公司 一种水泥生产用多级粉磨装置
DE102020100254A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur Herstellung eines Baustoffs aus Phosphorgips
DE102020100260A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur Herstellung von Schwefelsäureprozess-geeigneter Schwefeldioxidqualität aus Kalziumsulfat/Phosphorgips aus der Phosphorsäureproduktion
DE102020100249A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat unter Gewinnung von Seltenen Erden aus der Phosphorsäureproduktion
DE102020100241A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Verfahren zur Herstellung von Phosphorsäure und Klinkerprozess-geeigneter Kalziumsulfatqualität zur kommerziellen und industriellen Verwertung von Kalziumsulfat
DE102020100238A1 (de) 2020-01-08 2021-07-08 Thyssenkrupp Ag Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat aus der Phosphorsäureproduktion
DE102020200878A1 (de) * 2020-01-24 2021-07-29 Thyssenkrupp Ag Rührwerkskugelmühle, Rührwerkskugelmühlenrührwerk und Verfahren zum Zerkleinern von Mahlgut

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518543C3 (de) * 1985-05-23 1996-12-19 Kloeckner Humboldt Deutz Ag Verfahren und Einrichtung zur Zerkleinerung bzw. Mahlung spröden Mahlgutes
DE4303987A1 (de) 1993-02-11 1994-08-18 Kloeckner Humboldt Deutz Ag Mahlverfahren und zugehörige Mahlanlage
DE4320025A1 (de) * 1993-06-17 1994-12-22 Krupp Polysius Ag Mahlanlage und Verfahren zum Mahlen und Sichten von sprödem Mahlgut
DE4337215A1 (de) * 1993-10-30 1995-05-04 Kloeckner Humboldt Deutz Ag Umlaufmahlanlage
DE19922449B4 (de) * 1999-05-11 2010-01-21 Bartsch, Thomas, Dr.-Ing. Verfahren zur Durchsatzregelung einer Mahlanlage
DE10221739A1 (de) 2002-05-16 2003-12-04 Kloeckner Humboldt Wedag Kreislaufmahlanlage mit Mühle und Sichter
RU2410159C1 (ru) * 2009-07-13 2011-01-27 Николай Фёдорович Глухарёв Способ измельчения неэлектропроводного материала, цемент или добавка, полученные этим способом, а также способ повышения износостойкости мелющих тел и способ повышения показателя текучести продукта с использованием способа измельчения
CN101947490B (zh) * 2010-09-30 2014-04-16 成都利君实业股份有限公司 用于精细化工的高压辊压机辊压粉磨方法
DE102011055762B4 (de) * 2011-11-28 2014-08-28 Maschinenfabrik Köppern GmbH & Co KG Vorrichtung zum Sichten von körnigem Gut und Mahlanlage
CN103041906A (zh) * 2013-01-03 2013-04-17 湖南三泓建材有限公司 一种矿渣微粉粉磨系统及工艺

Also Published As

Publication number Publication date
EP3154701C0 (de) 2024-04-10
EP3154701A1 (de) 2017-04-19
WO2015189131A1 (de) 2015-12-17
CN106457259A (zh) 2017-02-22
CN106457259B (zh) 2019-06-18
DE102014108334A1 (de) 2015-12-17

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