EP2024091B1 - Roller press, in particular for interparticle crushing - Google Patents

Roller press, in particular for interparticle crushing Download PDF

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Publication number
EP2024091B1
EP2024091B1 EP20070725735 EP07725735A EP2024091B1 EP 2024091 B1 EP2024091 B1 EP 2024091B1 EP 20070725735 EP20070725735 EP 20070725735 EP 07725735 A EP07725735 A EP 07725735A EP 2024091 B1 EP2024091 B1 EP 2024091B1
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EP
European Patent Office
Prior art keywords
press
nip
roller
pressure
fine
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.)
Active
Application number
EP20070725735
Other languages
German (de)
French (fr)
Other versions
EP2024091A1 (en
Inventor
Siegfried Strasser
Andreas Enders
Silke Liedtke
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
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.)
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Publication date
Priority to DE200610025833 priority Critical patent/DE102006025833A1/en
Application filed by KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Priority to PCT/EP2007/004855 priority patent/WO2007140929A1/en
Publication of EP2024091A1 publication Critical patent/EP2024091A1/en
Application granted granted Critical
Publication of EP2024091B1 publication Critical patent/EP2024091B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/28Details
    • B02C4/286Feeding devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30Feeding material to presses
    • B30B15/302Feeding material in particulate or plastic state to moulding presses
    • B30B15/308Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses

Description

  • The invention relates to a roll press with two rotatably mounted counter-rotating and separated by a press nip rolls for pressure treatment, in particular for Gutbettzerkleinerung or compaction or briquetting granular material, with an above the nip arranged Gutaufgabeschacht with an entry opening for the introduction of coarse material and with a Entrance opening for the introduction of fines material such. B. the recirculated. Meal of a circulating classifier.
  • When operating such roller presses for pressure treatment granular material, the individual pieces or particles of imported into the Gutaufgabeschacht regrind such. As cement raw material, cement clinker, ores or the like are detected by the counter-rotating rollers and fed by friction in the nip. In this case, the individual particles of the drawn into the region of the narrowest nip grinding material in a bed of material, d. H. in a pressed together between the two roll surfaces material bed when using a high pressing pressure mutually crushed, so that one speaks here of the so-called Gutbettzerkleinerung.
  • Is the feed to the roller press at least in part already very fine-grained by z in the Gutaufgabeschacht for fresh feed. B. large amounts of the grits of the roller press, if necessary via a Fine mill downstream classifier can be recirculated, then the Guteinzugsvermögen the rolls can be degraded and the throughput of the roller press can be reduced. Because the supply of Gutmaterialströmen with significantly different grain size and particle size distribution is problematic because of segregation in Gutaufgabeschacht for roller press. Namely, the bulk density of the recirculated grits is considerably smaller than the bulk density of the fresh feedstock, ie the porosity of the classifier grain is greater than that of the fresh feedstock. The changing supply of coarse and fine material to the nip interferes with the stability of the grinding bed and reduces the milling efficiency.
  • It has therefore already been suggested DE 39 16 641 A1 Figures 2 and 3, in a roll press for Gutbettzerkleinerung in Gutaufgabeschacht the coarse z. As fresh ground material and the fines z. B. recirculated. Sichtergrieße, blast furnace slag, etc. introduced separately from each other and vorzuverdichten the fines in Gutaufgabeschacht by its own Vorverdichterwalze to approximate in this way the porosity of the fine material to the porosity of coarse material or fresh good and the Guteinzugsbedingung consisting of fresh material and pre-compacted fine material in the nip of actual high-pressure roller press to improve. However, this technology requires the use of at least three rollers and is therefore expensive.
  • In the Gutbettzerkleinerungs roller press the DE-38 23 929 A1 are also used in a machine frame three rolls, namely a driven main roll, at the upper portion of a non-driven idler roller and at the lower portion of a second non-driven idler roller are pressed by means of hydraulic pressure devices. In this solution, only the fresh feed material is in the first (upper) nip pre-crushed, while in the second (lower) nip of the total two-stage working roll press the recirculated Sichtergrieße a downstream classifier are introduced, ie in the lower nip the already pre-pressed in the upper nip compacted Gutmaterial and the comparatively very loose porous Sichtergrießematerial must be drawn by friction , which is problematic for the above reasons.
  • Moreover, from the DE-C 38 02 173 for compacting fine-grained salts, a roller press is known above the nip of which a plurality of filling ducts are arranged next to one another, in each of which a filling screw is located, ie the entire feed material is fed to the nip via the filling screws. Separate treatment and feed of coarse material and fine material in the nip does not take place.
  • From the US 2005/035 479 A1 is a waltz press known, which has separate entry openings for coarse and fine material, each with screw conveyors.
  • The invention has for its object to provide a particular used for Gutbettzerkleinerung comparatively simple built roller press, in the Gutaufgabeschacht both coarse material such. B. Frischgut as well as fine-grained material such. B. recirculated grits of a downstream classifier and / or z. As fly ash be introduced, despite the significantly different grain size and particle size distribution in the two to be recovered in the nip streams the stability of the bed of material or grinding bed and thus a high grinding efficiency is guaranteed.
  • This object is achieved according to the invention with a roller press with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.
  • In the roll press according to the invention, in particular for comminution, the two streams coarse-grained material and fine-grained material are introduced into the crop hopper separated from each other. For this purpose, the Gutaufgabeschacht on its upper side a Grobguteintragsöffnung and preferably lying on the side transverse to the nip at least one fine material insertion opening. Due to the at least one fine material inlet opening of the material feed chute, a pressure screw conveying the fine grain under pressure is inserted into the feed hopper whose nozzle-like orifice reaches into the central region of the feed intake of the press nip of the roller press and the nozzle of the pressure screw via a joint to the discharge opening the pressure screw is articulated. In this case, the fine grain material is surrounded by the coarse grain material in the high pressure zone of the nip, whereby the risk of segregation of the two streams in Gutaufgabeschacht and an alternating supply of coarse and fine material is minimized in the nip.
  • According to a further feature of the invention, the nozzle of the pressure screw, which is inserted transversely to the nip from the side in the crop hopper horizontally or obliquely to the horizontal lying hinged via the joint to the mouth of the pressure screw. Thus, the nozzle can in particular center flat nozzle within the print zone in the good bed above the nip of the roller press in the printing center itself.
  • The invention and its further features and advantages will be explained in more detail with reference to the embodiments illustrated in the drawings.
  • It shows:
  • Fig. 1:
    a first embodiment of the roller press according to the invention with an approximately horizontally arranged introduced into the Gutaufgabeschacht fines pressure screw, and
    Fig. 2:
    a second embodiment of the roll press, wherein the pressure screw is arranged obliquely inclined to the horizontal.
  • To Fig. 1 the roll press according to the invention comprises two rotatably mounted, counterrotatable and separated by a press nip rollers 10, 11, of which the roller 10 is the hard roller, while the other roller 11 is formed as a transverse to the nip movable Loswalze whose bearing housing supported by hydraulic cylinders are, with which the roller press force is used up.
  • Above the nip a Gutaufgabeschacht 12 is arranged, which has at its top an entry opening 13 for the introduction of coarse material 14, which is supplied under the action of gravity. When Grobgutmaterial 14 may be z. B. to be comminuted or to be ground fresh product such. As cement clinker, etc. act, and the slope top of this bulk material within the Gutaufgabeschachtes 12 is indicated by 15. Furthermore, the crop feed chute 12 on the side of at least one fines entry opening 16 through which in the feed chute 12 a fine material under pressure pressure-promoting screw conveyor 17 is inserted, the nozzle-like orifice extends into the central region of the Guteinzuges the press nip. Grain size and grain distribution of the feed opening 18 of the screw conveyor 17 imported fines 19 are significantly different to the coarse material 14. Thus, the grain size of the introduced fines 19 z. B. up to 100% <3 mm, which is the case when introducing z. B. of fine recirculated Sichtergrießen, fly ash, blastfurnace slag, slag meal etc ..
  • The nozzle at the mouth of the pressure screw 17 for introducing the fine material fraction 19 is arranged above the narrowest nip arranged parallel to this lying within the Gutbettschüttung 15 flat nozzle 20. This flat nozzle 20 is articulated via a hinge 21 to the mouth of the pressure screw 17. In any case, the nozzle 20 of the pressure screw 19 in the center of Guteinzugsbereiches the press nip is surrounded on all sides by the remaining in the nip coarse grain fraction 15, whereby segregation of the two streams in the narrowest nip, in which in the Gutbettzerkleinerung the comparatively high roll pressure in the Gutmaterialschüttung effective is, are avoided.
  • In contrast to Fig. 1 is in the embodiment of Fig. 2 the transversely to the nip pressure roller 17 lying obliquely to the horizontal lying in the Gutaufgabeschacht 12 of the roller press introduced, ie the Gutaufgabeende the pressure screw 17 is higher than the mouth of the pressure screw with its flat nozzle 20. This solution has the additional advantage that by the pressure screw 17th the assembly and disassembly of the roller 10 is not hindered.
  • In all embodiments, the pressing force on the material of the rolls 10, 11 of the roll press contributes more than 2 MN / m roll length. The grain size of a substantial part of the abandoned coarse material 14 may be larger than the width of the narrowest nip of z. B. 20 mm, which is the case for. B. in grinding not pre-shredded cement clinker with a grain size to z. B. 100 mm, so that then the feedstock in the narrowest nip is crushed by a combined single grain size reduction and comminution. The material passes from the nip crushed and partially agglomerated, ie compacted into slugs 22 whose proportion of particles reduced to the desired final fineness (eg 30% <90 μm) can already be relatively high. The slugs 22 are then deagglomerated and sifted in a downstream device, with the classifier 19 being recirculated to the pressure screw 17 and from there into the narrowest nip of the roller press.

Claims (4)

  1. Roller press having two rotatably mounted rollers (10, 11) which are driven in opposite directions, are separated from one another by a press roller nip and are intended for pressure treatment, in particular for material bed comminution or compaction or briquetting of granular material, having a material feed hopper (12) which is arranged above the roller nip and has an inlet opening (13) for introducing coarse material and an inlet opening (16) for introducing fine material such as, for example, the recirculated grits from a sifter device connected in the circuit,
    characterized in that a pressure screw (17) which conveys the fine material under pressure is inserted into the material feed hopper (12) through the at least one fine-material inlet opening (16) in the latter, the nozzle-like issue of said pressure screw reaches into the central region of the material draw-in of the press roller nip and the nozzle (20) of the pressure screw (17) is linked to the issue of the pressure screw by means of a joint (21).
  2. Roller press according to Claim 1,
    characterized in that the pressure screw (17) is inserted into the material feed hopper (12) from the side transversely with respect to the roller nip, in a manner lying horizontally or obliquely with respect to the horizontal.
  3. Roller press according to one or more of Claims 1 to 2,
    characterized in that the nozzle (20) of the pressure screw (17) is surrounded on all sides by the coarse fraction (15) located in the roller nip in the centre of pressure of the region of material draw-in of the press roller nip.
  4. Roller press according to Claims 1 to 3,
    characterized in that the grain size of the fine fraction to be conveyed by the pressure screw (17) is up to 100% < 3 mm.
EP20070725735 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing Active EP2024091B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200610025833 DE102006025833A1 (en) 2006-06-02 2006-06-02 Roller press especially for comminution
PCT/EP2007/004855 WO2007140929A1 (en) 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing

Publications (2)

Publication Number Publication Date
EP2024091A1 EP2024091A1 (en) 2009-02-18
EP2024091B1 true EP2024091B1 (en) 2012-12-12

Family

ID=38324018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070725735 Active EP2024091B1 (en) 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing

Country Status (8)

Country Link
US (1) US20090236455A1 (en)
EP (1) EP2024091B1 (en)
CN (1) CN101460247A (en)
CA (1) CA2653065A1 (en)
DE (1) DE102006025833A1 (en)
DK (1) DK2024091T3 (en)
RU (1) RU2008144301A (en)
WO (1) WO2007140929A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008043140A1 (en) 2008-07-02 2010-01-07 Bühler AG Method for producing e.g. flour from wheat, involves using mill i.e. material-bed roller mill, for producing plant milling product, where breaking-up and separation steps of milling product follow grinding step in mill
KR101821088B1 (en) * 2008-07-02 2018-01-22 뷔흘러 에이지 Apparatus and method for producing flour and/or semolina
CN101985107A (en) * 2010-07-15 2011-03-16 王维东 Plastic grinder
US8632028B2 (en) 2010-09-02 2014-01-21 Flsmidth A/S Device for the comminution of material
CN103223364A (en) * 2013-04-23 2013-07-31 安徽省荆涂机电工程有限公司 Double helix stirring and crushing integrated apparatus
DE102013018325B4 (en) 2013-10-31 2019-03-21 Khd Humboldt Wedag Gmbh High-pressure roller press with regrind removal and method for avoiding vibrations during the application of regrind
CN104785351A (en) * 2015-03-27 2015-07-22 中建材(合肥)粉体科技装备有限公司 Partitioning feeding device of roller press
CN107362860A (en) * 2017-08-09 2017-11-21 陈秀玲 Medicinal material disintegrating machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE639194C (en) * 1933-02-21 1936-11-30 Schuechtermann & Kremer A method for briquetting of Feinmuell on roller presses
DE1247123B (en) * 1963-07-31 1967-08-10 Rettenmaier & Soehne J Means for supplying an existing small particle material to a nip
DK418387A (en) * 1987-08-11 1989-02-12 Smidth & Co As F L Method and apparatus for rolling crushing and milling of mineral materials
DE3916641A1 (en) * 1989-05-22 1990-11-29 Kloeckner Humboldt Deutz Ag Roller press, in particular for pressure reduction, grinned goods
DE3926882A1 (en) * 1989-08-16 1991-02-21 Kloeckner Humboldt Deutz Ag Cycling machine for grinding sproedem good
JPH08503737A (en) * 1993-09-30 1996-04-23 マシネンファブリーク・ケッパーン・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンデイト・ゲゼルシャフト Method for producing spongy iron briquettes from fine-grained ore
GB2367030B (en) * 2000-09-20 2002-12-31 Reckitt Benckiser Nv Method and apparatus for manufacturing multi-layer press molded bodies
DE10144109A1 (en) * 2001-09-03 2003-04-24 Michael K Bahr Compressing and granulating finely dispersed powders or powder mixtures comprises adding binder as finely dispersed powder in small amounts to powder

Also Published As

Publication number Publication date
RU2008144301A (en) 2010-07-20
WO2007140929A1 (en) 2007-12-13
CN101460247A (en) 2009-06-17
EP2024091A1 (en) 2009-02-18
CA2653065A1 (en) 2007-12-13
DE102006025833A1 (en) 2007-12-06
US20090236455A1 (en) 2009-09-24
DK2024091T3 (en) 2013-03-25

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