EP0527333A1 - Procédé et installation de broyage pour matériau friable - Google Patents

Procédé et installation de broyage pour matériau friable Download PDF

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Publication number
EP0527333A1
EP0527333A1 EP92111630A EP92111630A EP0527333A1 EP 0527333 A1 EP0527333 A1 EP 0527333A1 EP 92111630 A EP92111630 A EP 92111630A EP 92111630 A EP92111630 A EP 92111630A EP 0527333 A1 EP0527333 A1 EP 0527333A1
Authority
EP
European Patent Office
Prior art keywords
regrind
moisture content
fresh
ground material
moisture
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
EP92111630A
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German (de)
English (en)
Other versions
EP0527333B1 (fr
Inventor
Don Longhurst
Norbert Dipl.-Ing. Patzelt
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
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Publication date
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Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0527333A1 publication Critical patent/EP0527333A1/fr
Application granted granted Critical
Publication of EP0527333B1 publication Critical patent/EP0527333B1/fr
Anticipated expiration legal-status Critical
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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • 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
    • 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

Definitions

  • the invention relates to a method (corresponding to the preamble of claim 1) and a system (corresponding to the preamble of claim 17) for crushing brittle regrind, in particular sand-like regrind.
  • At least a portion of the partial stream returned to the roll nip is dried to such an extent before it is re-introduced into the roll nip that a mixed moisture content is established in the roll nip that is below the critical moisture content, the so-called "limit moisture" above which the Grist tends to stick and / or bake, is assumed to be 12%, so that accordingly a mixed moisture of slightly below this moisture content is aimed for. If the moisture content is considered too low, an artificial increase in the mixed moisture is considered expedient.
  • the invention is based on the object of a method according to the preamble of claim 1 and a system according to the preamble of claim 17 create, which ensure a particularly good feed capacity of brittle regrind, in particular sand-like brittle regrind, in the nip of two rolls of a material bed roller mill with reliable and relatively easy to control operation.
  • Optimal intake of brittle regrind and in particular of sand-like brittle regrind and above all of slag sand in the nip of a material bed roller mill can be achieved in that the ground material is adjusted to a (mixed) moisture content of about 0.3 to 3.0%, preferably of about 0.5 to 2.0%, at the inlet to the roll nip. With this moisture content, there is also an extremely favorable scale production for comminution in the material bed.
  • a very favorable moisture content can be selected in the range from about 0.8 to 1.5%, preferably around 1%.
  • the moisture content of the regrind running towards the nip which is regarded as optimal for a good absorption capacity, in that the moisture content of this regrind can be controlled by precisely controllable ones Addition of water is increased accordingly.
  • a skewing can at least temporarily increase the moisture content of the regrind components that run towards the roll gap in the longitudinal gap area with the smaller gap width.
  • other causes lead to this skewing of the rollers such as. B. the supply of large pieces of material in the region of one roller end and fine material in the region of the opposite roller ends, or a corresponding one-sided inflow of regrind from an inlet container.
  • a measurement signal derived from a vibration of the rollers can advantageously be evaluated to control at least a temporary addition of water, the level of the vibration measurement value being also processed in a total moisture control as a factor in terms of a change in the moisture content of the material to be fed to the roller gap, i.e. H. if e.g.
  • the mixed moisture content of the ground material to be set according to the invention can be brought about in practical operation in various ways, in each case depending on the material to be ground, on the desired end product and on the size reduction process to be selected or the corresponding size reduction system, in order to control this moisture content -
  • the current operating behavior of the rollers or the associated roller mill can also be used, and the aforementioned additional addition of water or liquid then serves as a kind of grinding aid.
  • this moist fresh regrind can be dried to an adjustable moisture content of about 0.3 to 3.0%, preferably of about 0.5 to 2.0%, before being fed to the roll nip be, for example in a corresponding upstream dryer.
  • a further possibility is also to dry a first fresh material portion in a drying device from a relatively moist fresh regrind to a moisture content of about ⁇ 0.5%, to guide a second fresh material portion in the bypass to the drying device and then to bring both fresh material portions together before the feed to the roller gap ,
  • These fresh material proportions are expediently chosen to be so large that a mixed moisture content of 0.3 to 3.0%, preferably approximately 0.5 to 2.0%, is set in front of the nip.
  • the moisture or the water still present in the regrind acts to a certain extent as a grinding aid for optimum good intake capacity the nip as well as a cheap production of slugs.
  • the procedure according to the invention is such that the total regrind composed of the fresh regrind and the returned regrind is fed to the roll nip to the mixed moisture content of about 0.3 to 3.0%, preferably from about 0.5 to 2.0%.
  • This recycled regrind can expediently be composed of a proportion of the good particles agglomerated into flakes and of semolina coming from a viewing zone downstream of the comminution.
  • the returned slugs ensure - how already indicated above - for optimal formation of the material bed in the material bed roller mill or in the nip of the two rollers of this roller mill.
  • the moisture content and amount of the fresh ground material can be supplied as a function of the quantities and moisture contents of the recirculated portion of pulp and the returned semolina at a predetermined throughput rate through the comminution rollers.
  • the said throughput rate can be controlled, for example, in accordance with a constant supply quantity to the viewing zone.
  • the moisture content of the recycled semolina can expediently be set to a value of about ⁇ 0.5%, which is already achieved by the fact that the comminuted regrind and thus also the semolina to be returned are in the visible zone, ie. H.
  • the moisture content of the recycled portion of flakes essentially corresponds to the mixed moisture content of the total ground material coming into the nip.
  • the proportion of the recirculated slugs on the one hand and the ratio between recirculated semolina and fresh regrind to be supplied on the other hand is kept essentially constant in each case.
  • the volume flows to be fed to the roll nip have different moisture contents and different temperatures, then it can occur during the merging of these mass flows may lead to vapor formation, which could lead to caking when the ground material is transported to the roller gap.
  • the different mass flows of the fresh millbase and the millbase to be returned are mixed together shortly before the nip in such a way that the mass flows with relatively moist material from one side and the mass flows with relatively dry one Flow well against each other from the opposite side, be brought together.
  • the latter also ensures sufficient mixing of the various mass flows via their throwing parabolas during the merging, as a result of which relatively expensive additional mixing devices can be avoided.
  • This method according to the invention is particularly advantageously suitable for crushing slag sand or similar brittle regrind (as fresh regrind).
  • a plant for comminuting brittle regrind, in particular sand-like regrind such as blastfurnace slag or the like contains at least one material bed roller mill with a mill inlet, two oppositely rotating rollers pressed against one another at high pressure, and a roller gap formed in the area between the rollers.
  • a system is characterized in that devices for treating freshly ground regrind are arranged in front of the mill inlet in such a way that the regrind has a moisture content of about 0.3 to 3.0%, preferably of about 0, to the roller gap. 5 to 2.0%, can be fed.
  • FIG 1 the shredding system is shown in a greatly simplified form for the sake of clarity.
  • This system which is intended in particular for crushing blast furnace slag, contains a material bed roller mill 1 with a mill inlet 2 serving to supply regrind, two rollers 3, 4 which are pressed against one another at high pressure and rotate in opposite directions, and with a roller gap 5 formed in the area between these rollers Mill inlet 2 are devices for treating freshly ground material that is conveyed in such a way that the ground material can be fed to the mill inlet 2 and thus to the nip 5 with a moisture content of preferably about 0.5 to 2.0%.
  • This system example therefore contains a suitable dryer 7 as a device in front of the mill inlet 2, in which the freshly ground material conveyed can be dried to a sufficient extent, preferably continuously.
  • the dryer 7 is also preferably a bypass line 8 for undried fresh Assigned regrind. This bypass line 8 is brought together in the area in front of the mill inlet 2 with the dry material line 9 coming from the dryer 7.
  • a first portion of the slag sand to be shredded in the dryer 7 to a sufficiently low moisture content, preferably about ⁇ 0.5%, while a second portion of the wet slag sand is bypass line 8 around the dryer 7 - in the bypass - so that - after the combination of dried and undried (moist) fresh regrind - a mixed moisture or a mixed moisture content can be achieved which meets the optimal feeding possibilities in the nip 5.
  • Corresponding switching flaps can of course also be provided, which make it possible to switch off the bypass to the dryer 7 or to completely bypass the freshly supplied slag sand around the dryer 7 (when the slag sand is sufficiently dry).
  • this system also includes a viewing device, preferably in the form of a suitable air classifier 11, which is used to classify ground material comminuted in the material bed roller mill 1.
  • a regrind line 12 leads from the outlet of the material bed roller mill 1 to the air classifier 11.
  • ground material which has been comminuted sufficiently can be discharged from the system, while coarse material which has been separated off as semolina is fed back via a semolina line 14 to the mill inlet 2, in order to obtain this size to further shred together with fresh regrind.
  • a Schülpentechnisch 15 is branched, which is used to return at least a portion of the Schellerpen coming from the Gutbett roll mill 1 to the mill inlet 2.
  • the semolina and scraps to be returned to the mill inlet 2 of the material-bed roller mill 1 can each be separately conveyed directly to the mill inlet via their lines 14 or 15, or there is also the possibility - not shown in the drawing - of the semolina to be returned via a semolina container (Intermediate container) precisely metered in quantity to feed the mill inlet 2 and, in adaptation thereto, feed the slugs either directly to the mill inlet 2 or first to the semolina tank in an adapted or controllable manner.
  • this plant offers several possibilities for the ground material to be ground to be fed to the grinding gap with a mixed moisture content in the range of preferably about 0.5 to 2.0%, as explained above using various or complementary procedures is.
  • the dryer upstream of the Guttbett roller mill can be set to 2.5% residual moisture for the fresh regrind. If this is not possible or does not make sense for procedural reasons, then part of the moist fresh ground material can be bypassed the dryer, while only the other part of the fresh ground material is dried, so that a mixed moisture content of dried and undried fresh ground material is 2.5% results.
  • the above-mentioned mixed moisture content of the fresh feed or regrind can, for. B. can be achieved in the following way: Moisture content of fresh regrind (blast furnace slag) before dryer 8th % 1. Fresh food portion to the dryer 20.5 t / h Moisture content of the 1st fresh food portion after the dryer 0.5% 2. Fresh product partial quantity (bypass quantity; without drying) 7.5 t / h
  • the moisture content of the slugs will - if necessary with small deviations upwards or downwards - be approximately in the order of magnitude of the moisture content of the total ground material at the mill inlet.
  • This table relates to fine grinding of blastfurnace slag in a shredding plant according to the embodiment illustrated in the drawing.
  • a type of buffer silo for recycled semolina can be arranged in order to be able to control the proportion of the semolina required for the material throughput of the roller mill, what For example, by continuous level measurement and control, a constant level - according to the requirements - by a corresponding one Raising or reducing the amount of semolina to be returned.
  • the requirement for freshly regrinded material to be fed to the material bed roller mill then arises from the total quantity of material to be ground (throughput) for the roller mill minus the amount of returned semolina and minus the amount of returned flakes.
  • This moisture control device 20 is connected to a number of moisture measuring devices known per se and arranged at suitable points (see dash-dotted connecting lines), namely with a measuring device 21 for freshly introduced regrind (6), a measuring device 22 for merged fresh regrind from bypass line 8 and Dry material line 9, at least one measuring device 23 for total ground material brought together at the mill inlet 2, with a measuring device 24 for crushed ground material and a measuring device 25 for returned semolina.
  • the moisture measurement signals of these measuring devices 21 to 25 are processed as control signals for a presettable mixed moisture content.
  • the roller mill 1 or its roller frame is assigned a vibration measuring device 28 at at least one suitable point.
  • This vibration measuring device 28 is also connected to the moisture control device 20 (see dash-dotted lines), and its measurement signals can also be evaluated as control signals for setting the moisture content.
  • the moisture content at the inlet 2 of the roller mill 1 can then be controlled via the moisture control device 20 - in the sense of at least occasionally additional one-sided or total water addition via a water addition device 10 'so that undesirably high vibrations can be prevented or eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fertilizers (AREA)
EP92111630A 1991-08-14 1992-07-09 Procédé et installation de broyage pour sable-laitier Revoked EP0527333B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4126899A DE4126899A1 (de) 1991-08-14 1991-08-14 Verfahren und anlage zum zerkleinern von sproedem mahlgut
DE4126899 1991-08-14

Publications (2)

Publication Number Publication Date
EP0527333A1 true EP0527333A1 (fr) 1993-02-17
EP0527333B1 EP0527333B1 (fr) 1997-01-29

Family

ID=6438302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111630A Revoked EP0527333B1 (fr) 1991-08-14 1992-07-09 Procédé et installation de broyage pour sable-laitier

Country Status (9)

Country Link
US (1) US5351894A (fr)
EP (1) EP0527333B1 (fr)
KR (1) KR930003963A (fr)
AT (1) ATE148376T1 (fr)
DE (2) DE4126899A1 (fr)
DK (1) DK0527333T3 (fr)
ES (1) ES2096678T3 (fr)
TW (1) TW268904B (fr)
ZA (1) ZA925344B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549136A2 (fr) * 1991-12-23 1993-06-30 F.L. Smidth & Co. A/S Procédé de broyage de matière en particules dans un broyeur à rouleaux et appareil pour la mise en oeuvre dudit procédé
EP0749782A1 (fr) * 1995-06-20 1996-12-27 Krupp Polysius Ag Procédé de broyage de matière fragile, en particulier de poussière de scorie de haut fourneau
DE19738228A1 (de) * 1997-09-02 1999-03-04 Kloeckner Humboldt Wedag Verfahren zur Kreislaufmahlung spröden Mahlgutes und Mahlanlage hierzu
DE19757431A1 (de) * 1997-12-23 1999-06-24 Kloeckner Humboldt Wedag Verfahren zum Betrieb einer Kreislaufmahlanlage zum Mahlen von sprödem Gut
WO2014090711A1 (fr) * 2012-12-13 2014-06-19 Khd Humboldt Wedag Gmbh Traitement de matière à broyer dans un broyeur sous pression
WO2014118235A1 (fr) * 2013-01-31 2014-08-07 Thyssenkrupp Industrial Solutions Ag Procédé et installation de broyage d'un matériau de départ en morceaux
WO2015063195A1 (fr) * 2013-10-31 2015-05-07 Khd Humboldt Wedag Gmbh Presse à rouleaux haute pression avec dégazage de la matière à broyer

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400796A1 (de) * 1994-01-13 1995-07-20 Krupp Polysius Ag Verfahren zur Gewinnung von Edelmetallen
DE19615480A1 (de) * 1996-04-19 1997-10-23 Deutz Ag Kreislaufmahlanlage mit einer Hochdruck-Walzenpresse
FR2777274B1 (fr) * 1998-04-09 2000-06-23 Mecaroute Procede de fabrication d'infrastructures a base de laitier vitrifie de haut-fourneau et additif utilise
TW466136B (en) * 2000-01-28 2001-12-01 F L Smidth & Amp Co As Method and apparatus for grinding of particulate material
CN103464240A (zh) * 2013-09-17 2013-12-25 中冶北方（大连）工程技术有限公司 高压辊磨机防偏析配矿系统
DE102013110981A1 (de) * 2013-10-02 2015-04-02 Thyssenkrupp Industrial Solutions Ag Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat, das eine rotierende Oberfläche aufweist
DE102014013526A1 (de) * 2014-09-12 2016-03-17 Hosokawa Alpine Aktiengesellschaft Trockenzerkleinerung und Dispergierung von Titandioxidklinker
EP3682221B1 (fr) * 2017-09-13 2024-01-17 Reflex Instruments Asia Pacific Pty Ltd Appareil de préparation d'échantillon par lots

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE3525936A1 (de) * 1985-07-19 1987-01-29 Krupp Polysius Ag Verfahren und anlage zur entwaesserung und zerkleinerung von mahlgut hoher feuchte
DE3901436A1 (de) * 1989-01-19 1990-07-26 Kloeckner Humboldt Deutz Ag Verfahren und anlage zur zerkleinerung bzw. mahlung feuchter materialien und deren trocknung in einem heissgasstrom
EP0220681B1 (fr) * 1985-10-29 1991-05-29 Klöckner-Humboldt-Deutz Aktiengesellschaft Installation pour fractionner et broyer des matériaux fragiles et mouillés

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DE650885C (de) * 1934-08-30 1937-10-04 Kohlenscheidungs Ges M B H Mahltrocknungsanlage
FR1357660A (fr) * 1962-02-15 1964-04-10 Metallgesellschaft Ag Procédé et installation pour la préparation de produits à base de caoutchouc et de matières plastiques contenant des fibres
US4134731A (en) * 1976-09-30 1979-01-16 Aerotherm, Inc. Composting apparatus with comminution, moisture control, and mascerator means
GB2131323B (en) * 1982-05-27 1986-07-02 Otisca Ind Ltd Methods for processing coal
JPS60260579A (ja) * 1984-01-13 1985-12-23 Yoshitomi Pharmaceut Ind Ltd プリン誘導体
DE3509330A1 (de) * 1985-03-15 1986-09-25 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung einer kohlesuspension
NZ217969A (en) * 1986-10-16 1989-03-29 Hansen Dev Ltd Nozzle for garden hose: spray pattern adjustable by threaded ring
DE3717975A1 (de) * 1987-05-27 1988-12-08 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von sproedem mahlgut
DE3920005A1 (de) * 1989-06-20 1991-01-03 Kloeckner Humboldt Deutz Ag Anlage zur zerkleinerung bzw. mahlung von sproedem gut und verfahren zum betrieb einer solchen anlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525936A1 (de) * 1985-07-19 1987-01-29 Krupp Polysius Ag Verfahren und anlage zur entwaesserung und zerkleinerung von mahlgut hoher feuchte
EP0220681B1 (fr) * 1985-10-29 1991-05-29 Klöckner-Humboldt-Deutz Aktiengesellschaft Installation pour fractionner et broyer des matériaux fragiles et mouillés
DE3901436A1 (de) * 1989-01-19 1990-07-26 Kloeckner Humboldt Deutz Ag Verfahren und anlage zur zerkleinerung bzw. mahlung feuchter materialien und deren trocknung in einem heissgasstrom

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549136A2 (fr) * 1991-12-23 1993-06-30 F.L. Smidth & Co. A/S Procédé de broyage de matière en particules dans un broyeur à rouleaux et appareil pour la mise en oeuvre dudit procédé
EP0549136A3 (en) * 1991-12-23 1993-11-03 Smidth & Co As F L Method for grinding particulate material in a roller press and apparatus for carrying out the method
EP0749782A1 (fr) * 1995-06-20 1996-12-27 Krupp Polysius Ag Procédé de broyage de matière fragile, en particulier de poussière de scorie de haut fourneau
DE19738228A1 (de) * 1997-09-02 1999-03-04 Kloeckner Humboldt Wedag Verfahren zur Kreislaufmahlung spröden Mahlgutes und Mahlanlage hierzu
DE19757431A1 (de) * 1997-12-23 1999-06-24 Kloeckner Humboldt Wedag Verfahren zum Betrieb einer Kreislaufmahlanlage zum Mahlen von sprödem Gut
WO2014090711A1 (fr) * 2012-12-13 2014-06-19 Khd Humboldt Wedag Gmbh Traitement de matière à broyer dans un broyeur sous pression
WO2014118235A1 (fr) * 2013-01-31 2014-08-07 Thyssenkrupp Industrial Solutions Ag Procédé et installation de broyage d'un matériau de départ en morceaux
US9914130B2 (en) 2013-01-31 2018-03-13 Thyssenkrupp Industrial Solutions Ag Method and system for grinding fragmentary starting material
EA030526B1 (ru) * 2013-01-31 2018-08-31 Тюссенкрупп Индастриал Солюшнс Аг Способ измельчения фрагментарного исходного материала
WO2015063195A1 (fr) * 2013-10-31 2015-05-07 Khd Humboldt Wedag Gmbh Presse à rouleaux haute pression avec dégazage de la matière à broyer

Also Published As

Publication number Publication date
ZA925344B (en) 1993-04-28
DE4126899A1 (de) 1993-02-18
EP0527333B1 (fr) 1997-01-29
ATE148376T1 (de) 1997-02-15
DE59207979D1 (de) 1997-03-13
DK0527333T3 (da) 1997-07-28
US5351894A (en) 1994-10-04
KR930003963A (ko) 1993-03-22
ES2096678T3 (es) 1997-03-16
TW268904B (fr) 1996-01-21

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