EP1129781A1 - Procédé et dispositif pour le triage en deux phases de matériaux granulaires - Google Patents

Procédé et dispositif pour le triage en deux phases de matériaux granulaires Download PDF

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Publication number
EP1129781A1
EP1129781A1 EP01104930A EP01104930A EP1129781A1 EP 1129781 A1 EP1129781 A1 EP 1129781A1 EP 01104930 A EP01104930 A EP 01104930A EP 01104930 A EP01104930 A EP 01104930A EP 1129781 A1 EP1129781 A1 EP 1129781A1
Authority
EP
European Patent Office
Prior art keywords
classifier
sifter
coarse
fine
coarse material
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.)
Withdrawn
Application number
EP01104930A
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German (de)
English (en)
Inventor
Siegfried Strasser
Albert Süssegger
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.)
Filing date
Publication date
Application filed by KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP1129781A1 publication Critical patent/EP1129781A1/fr
Withdrawn legal-status Critical Current

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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
    • 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 two-stage sifting granular good that in a first sifter into a first coarse and a first fines is separated, the latter in a second Classifier is separated into a second coarse material and a second fine material.
  • the invention also relates to a system for carrying out the Procedure.
  • DE-A-195 26 040 describes a two-stage sifting of a granular one Good known, namely a cement mill produced in a mill, that in a first classifier into a first coarse material and a first fines are classified, the latter in a second classifier into a second coarse and a second fine, that's the finished fine Cement that is classified.
  • the coarse material from the first sifter is in the Circuit returned to the mill, which is a material bed roller mill, a roller mill, a ring mill or another shredding machine can be.
  • the second coarse material from the second Sifter is returned to the first sifter when the material enters.
  • the second sifter receives at most only that amount Fine material from the first sifter, depending on the grain size of the Fresh produce and setting the separation limit of the first classifier as Fine goods and thus left as feed for the second classifier remained, d. H. they are operating states for the second sifter not excluded, where the second classifier z. B. too little Receives fines from the first classifier as feed and the feed load of the second classifier falls so far that there is too high a selectivity in the second sifter, the one steep grain size curve or a narrow grain size distribution for As a result, this is not desirable, at least for the cement product would.
  • the invention is based, the two-stage sighting task of a granular material, in particular a cement ground material in two sequential sifters so that with simple means the separation behavior or the separation effect and thus the grain distribution of that coming from the second sure Fine goods, which are usually the finished goods, can be changed.
  • Characteristic of the two-stage sighting of a granular good is that the coarse material from the second sifter is not as usual for the first sifter and / or Mill is recirculated, but the coarse material from the second classifier is partially or completely recirculated to the second sifter abandoned, d. H. by the amount of that recirculated to the second sifter Coarse goods become the loading of the goods and thus that Separation behavior of the second classifier set so that from this a second fine material can be withdrawn, usually the finished product, that has the desired grain size distribution.
  • the Increased amount of coarse material from the second classifier and vice versa.
  • By recirculating at least one partial stream of the second coarse good from the second classifier back in this classifier also increases the dwell time of this good in second classifier, which is beneficial for drying moist Visible good effects when using hot gas as classifying air.
  • controllable feed loading the second sifter can also be automated by a regular intervention on the amount of coarse material recirculated to the second sifter depending on the grain steepness of the finished goods or the loading of the second sifter takes place.
  • the drawing shows schematically the two-stage sifting of a granular feed A1, which is z. B. can be ground cement raw meal, ground cement clinker or the like.
  • the granular material A1 is first separated into a first coarse material G1 and into a first fine material F1 in a first classifier S1, the latter being separated into a second coarse material G2 and a second fine material F2, usually the finished product, in a second classifier S2 .
  • the Blaine fineness of the fine material F2 drawn off from the second classifier S2 should, for. B. be greater than 3000 cm 2 / g.
  • a good-flow divider 10 is arranged, of which a recirculation line or transport device 11 for returning at least a partial flow of the second coarse material G2 to the second classifier S2 leads, i.e. H.
  • the coarse material of the second classifier S2 can be according to the invention partially or completely the second classifier S2 again be given up, for. B. together with the fines F1 of the first classifier S1.
  • the transport of fines from the first sifter S1 to the second classifier S2 can either be pneumatic with the Visual air or mechanically.
  • the internal Good recirculation by the second classifier S2 increases the good dwell time, which has a positive effect on the drying of possibly damp goods.
  • Partial stream 12 of the coarse material G2 can be a separate grinding product, thus a "middle good"; however, this good can also be the first Coarse material G1 from the first classifier S1 and / or for the purpose of loading first classifier S1 and / or to the mill in the grinding circuit of this first classifier S1 can be recirculated.
  • the Blaine fineness of the first fine material F1 from the first classifier S1 can e.g. B. be greater than 800 cm 2 / g, and the average Blaine fineness of the partial stream 11 of the second coarse material G2 returned to the second sifter S2 can, for. B. be about 500 cm 2 / g.
EP01104930A 2000-03-03 2001-02-28 Procédé et dispositif pour le triage en deux phases de matériaux granulaires Withdrawn EP1129781A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10010406 2000-03-03
DE10010406A DE10010406A1 (de) 2000-03-03 2000-03-03 Verfahren und Anlage zur zweistufigen Sichtung körnigen Gutes

Publications (1)

Publication Number Publication Date
EP1129781A1 true EP1129781A1 (fr) 2001-09-05

Family

ID=7633386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104930A Withdrawn EP1129781A1 (fr) 2000-03-03 2001-02-28 Procédé et dispositif pour le triage en deux phases de matériaux granulaires

Country Status (3)

Country Link
US (1) US6508420B2 (fr)
EP (1) EP1129781A1 (fr)
DE (1) DE10010406A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7799128B2 (en) 2008-10-10 2010-09-21 Roman Cement, Llc High early strength pozzolan cement blends
US8414700B2 (en) 2010-07-16 2013-04-09 Roman Cement, Llc Narrow PSD hydraulic cement, cement-SCM blends, and methods for making same
US9272953B2 (en) 2010-11-30 2016-03-01 Roman Cement, Llc High early strength cement-SCM blends
PE20142096A1 (es) 2011-10-20 2014-12-06 Roman Cement Llc Mezclas de cemento-scm de particulas empacadas
CN103588194A (zh) * 2013-06-19 2014-02-19 上海捷罡机械有限公司 基于分级机的石墨球形生产装置及其加工处理方法
US11168029B2 (en) 2017-01-10 2021-11-09 Roman Cement, Llc Use of mineral fines to reduce clinker content of cementitious compositions
US10730805B2 (en) 2017-01-10 2020-08-04 Roman Cement, Llc Use of quarry fines and/or limestone powder to reduce clinker content of cementitious compositions
US10737980B2 (en) 2017-01-10 2020-08-11 Roman Cement, Llc Use of mineral fines to reduce clinker content of cementitious compositions
US10131575B2 (en) 2017-01-10 2018-11-20 Roman Cement, Llc Use of quarry fines and/or limestone powder to reduce clinker content of cementitious compositions

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586248A (en) * 1968-03-21 1971-06-22 Escher Wyss Ltd Process for grinding and sifting
DE3334235A1 (de) * 1982-11-04 1984-05-10 Heinz 4630 Bochum Jäger Verfahren und vorrichtung zur energiesparenden herstellung eines feingutes, insbesondere zement
US5462234A (en) * 1993-06-16 1995-10-31 Krupp Polysius Ag Grinding plant and method of grinding and classifying brittle material for grinding
DE19526040A1 (de) 1995-07-17 1997-01-23 Krupp Polysius Ag Verfahren und Anlage zur Zerkleinerung von Mahlgut
EP0650763B1 (fr) 1993-10-30 1998-12-02 DEUTZ Aktiengesellschaft Installation de broyage en circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114347A1 (de) * 1971-03-24 1972-10-05 Pfeiffer Fa Christian Umluftsichter mit Heisslufttrocknung
DE2235789C3 (de) * 1972-07-21 1974-12-12 Polysius Ag, 4723 Neubeckum Vertikalachsiger Umluft-Windsichter
US4784333A (en) * 1986-10-29 1988-11-15 Canon Kabushiki Kaisha Process for producing toner powder
DE3921823A1 (de) * 1989-07-03 1991-01-17 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von mahlgut
DE4239602A1 (de) * 1992-11-25 1994-05-26 Krupp Polysius Ag Verfahren und Vorrichtung zur Zerkleinerung von Mahlgut
DE19514971A1 (de) * 1994-04-27 1995-11-02 Heinz Jaeger Verfahren und Anlage zur energiesparenden Herstellung eines Feingutes
DE19512509B4 (de) * 1995-04-04 2009-07-30 Polysius Ag Verfahren zur Zerkleinerung von Erzmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586248A (en) * 1968-03-21 1971-06-22 Escher Wyss Ltd Process for grinding and sifting
DE3334235A1 (de) * 1982-11-04 1984-05-10 Heinz 4630 Bochum Jäger Verfahren und vorrichtung zur energiesparenden herstellung eines feingutes, insbesondere zement
US5462234A (en) * 1993-06-16 1995-10-31 Krupp Polysius Ag Grinding plant and method of grinding and classifying brittle material for grinding
EP0650763B1 (fr) 1993-10-30 1998-12-02 DEUTZ Aktiengesellschaft Installation de broyage en circuit
DE19526040A1 (de) 1995-07-17 1997-01-23 Krupp Polysius Ag Verfahren und Anlage zur Zerkleinerung von Mahlgut

Also Published As

Publication number Publication date
US20010020654A1 (en) 2001-09-13
US6508420B2 (en) 2003-01-21
DE10010406A1 (de) 2001-09-06

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