EP0574718A2 - Verfahren zum Betrieb einer Gutbett-Walzenmühle - Google Patents

Verfahren zum Betrieb einer Gutbett-Walzenmühle Download PDF

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Publication number
EP0574718A2
EP0574718A2 EP93108120A EP93108120A EP0574718A2 EP 0574718 A2 EP0574718 A2 EP 0574718A2 EP 93108120 A EP93108120 A EP 93108120A EP 93108120 A EP93108120 A EP 93108120A EP 0574718 A2 EP0574718 A2 EP 0574718A2
Authority
EP
European Patent Office
Prior art keywords
pressure
grinding
roller
rollers
alarm signal
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Withdrawn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
EP93108120A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0574718A3 (da
Inventor
Don Longhurst
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
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0574718A2 publication Critical patent/EP0574718A2/de
Publication of EP0574718A3 publication Critical patent/EP0574718A3/xx
Withdrawn legal-status Critical Current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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • 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
    • 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
    • B02C23/04—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the invention relates to a method for operating a material bed roller mill intended for comminuting brittle regrind, according to the preamble of claim 1.
  • brittle regrind e.g. cement materials, ore materials, slag sand or the like
  • an external grinding force is applied to the two counter-rotating grinding rollers, for example with the aid of hydraulic pressure cylinders, in such a way that the grinding rollers are subjected to high pressure while maintaining a variable distance between them the two grinding rollers are pressed against each other.
  • the supplied regrind is subjected to a material bed comminution, the comminuted regrind leaving this nip predominantly in the form of compressed, agglomerated flakes, which are then dissolved or disagglomerated in a separate operation.
  • the invention is therefore based on the object of providing a method of the type mentioned in the preamble of claim 1, by means of which the operational disturbances attributable to damage to the roller surface can be largely avoided with optimum performance of the material bed roller mill.
  • the quality of the hard roller surface depends on various factors, in particular on the different hard materials that can be used, the type of application of this surface material (for example by casting or cladding) or on the structural shape of the rollers (ie whether it is is a roller with a segmented surface or segmented jacket or a full roller).
  • the maximum permissible roller surface pressure in the nip with which the Gutbett roller mill is allowed to work is determined, for which empirical values determined in practice as well as optimal operating pressures are used for the performance of the Gutbett roller mill.
  • This maximum permissible roller surface pressure is then used for the operational control of the roller mill as a set pressure value, so that the roller surface pressure occurring on the roller surfaces and which fluctuates frequently due to various influences can then be continuously monitored during the entire comminution operation of the material bed roller mill. At least when the preset maximum permissible roller surface pressure is exceeded, an alarm signal is generated by which the grinding force can be reduced at least temporarily until the event causing the maximum permissible roller surface pressure to be exceeded is eliminated and the roller mill can be switched back to its optimal grinding force.
  • This procedure according to the invention avoids with high reliability that damage to the hard roller surface and thus an undesired downtime is brought about by an - possibly only temporary - excessive roller surface pressure.
  • this can mean, for example, that grinding rolls, the surface or jacket of which is produced by hard material build-up welding, in which certain welding errors cannot always be completely avoided, are operated on the one hand with an optimal operating pressure in the roll gap limited by the maximum permissible roll surface pressure and on the other hand, due to the monitoring of this roller surface pressure, the grinding force is always controlled when there is a risk of damage to the roller surface due to an excessive roller surface pressure.
  • the grinding force applied to the grinding rollers and thus the resulting maximum permissible roller surface pressure are exceeded for longer, the grinding force is reduced in the manner mentioned via the alarm signal and the pressure medium control circuit. If the alarm signal persists, this can initially control at least one stage the pressure medium supply to the pressure medium cylinders, which act on the grinding rollers for generating the grinding force, in the sense of releasing pressure medium, as a result of which the grinding force is then reduced accordingly. However, if this is not sufficient and the alarm signal continues, the drive of the grinding rollers and / or the material supply can be switched off in order to search for and eliminate the cause of the undesired pressure increase.
  • the maximum permissible pressure medium associated with the respective grinding gap widths can be specified for a certain machine size and a certain regrind.
  • the drawing shows such a curve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP93108120A 1992-06-17 1993-05-18 Verfahren zum Betrieb einer Gutbett-Walzenmühle Withdrawn EP0574718A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219886A DE4219886A1 (de) 1992-06-17 1992-06-17 Verfahren zum Betrieb einer Gutbett-Walzenmühle
DE4219886 1992-06-17

Publications (2)

Publication Number Publication Date
EP0574718A2 true EP0574718A2 (de) 1993-12-22
EP0574718A3 EP0574718A3 (da) 1994-03-23

Family

ID=6461251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108120A Withdrawn EP0574718A2 (de) 1992-06-17 1993-05-18 Verfahren zum Betrieb einer Gutbett-Walzenmühle

Country Status (6)

Country Link
US (1) US5383610A (da)
EP (1) EP0574718A2 (da)
KR (1) KR940000153A (da)
DE (1) DE4219886A1 (da)
TW (1) TW226340B (da)
ZA (1) ZA933537B (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694508A1 (fr) * 1992-08-07 1994-02-11 Kloeckner Humboldt Deutz Ag Procédé et installation pour traiter par compression des produits granuleux.
DE4414366A1 (de) * 1994-04-25 1995-10-26 Krupp Polysius Ag Verfahren zur Regelung des Hydraulikdrucks

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7154061B2 (en) 2004-07-21 2006-12-26 Abb Inc. Interrupter assembly for a circuit breaker
US12036637B2 (en) 2018-04-24 2024-07-16 Cold Jet, Llc Particle blast apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171332A (en) * 1985-02-21 1986-08-28 Craven Fawcett Limited Grinding machine
EP0405102A1 (de) * 1989-06-28 1991-01-02 Krupp Polysius Ag Verfahren und Vorrichtung zum Zerkleinern von Mahlgut

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US3122992A (en) * 1964-03-03 kautz
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US2173460A (en) * 1935-07-06 1939-09-19 Shell Dev Process for fractionating hydrocarbon oils
CH310009A (de) * 1953-03-27 1955-09-30 Buehler Fa Geb Bruchsicherung an einem Walzwerk.
DE1148850B (de) * 1961-01-09 1963-05-16 Westfalia Dinnendahl Groeppel Verfahren zum Ermitteln und Ausscheiden von unzerkleinerbaren Fremdkoerpern aus vorzerkleinertem Rohgut
US3099406A (en) * 1961-05-02 1963-07-30 Mine And Smelter Supply Co Ore crusher
US3310244A (en) * 1965-03-18 1967-03-21 Abington Textile Mach Works Load cell for crushing rolls
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DE1607573B2 (de) * 1967-12-01 1972-01-27 Polysius Ag, 4723 Neubeckum Verfahren und Einrichtung zum Schutz von Quetschmuhlen gegen Überlastung
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DE2449344A1 (de) * 1974-10-17 1976-04-22 Ver Flugtechnische Werke Oelmahlwerk mit einer automatischen stelleinrichtung
DE2540269B2 (de) * 1975-09-10 1980-12-18 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Einstellbare Stützvorrichtung für die Loswalze einer Walzenmühle
US4372496A (en) * 1980-10-01 1983-02-08 Combustion Engineering, Inc. Electronic controller of hydraulic pressure for journal loading of bowl mill
DE3112913C2 (de) * 1981-03-31 1984-10-04 Feinwerktechnik Schleicher & Co, 7778 Markdorf Arbeitsverfahren zum Betrieb eines Reißwerks und hiernach betriebenes Reißwerk
DE3238630A1 (de) * 1982-10-19 1984-04-19 Karl Händle & Söhne Maschinenfabrik u. Eisengießerei, GmbH & Co KG, 7130 Mühlacker Maschine zum zerkleinern von gut, insbesondere von keramischem oder aehnlichem mahlgut
SU1135487A1 (ru) * 1983-04-04 1985-01-23 Всесоюзный Научно-Исследовательский Институт По Машинам Для Промышленности Строительных Материалов Вальцы дл помола керамического сырь
US4487044A (en) * 1983-06-30 1984-12-11 General Electric Company Friction compensation in a rolling mill having automatic gage control
US4491000A (en) * 1983-06-30 1985-01-01 General Electric Company Method and apparatus for improved sensing of roll separation force in a rolling mill
DD225056A1 (de) * 1984-05-08 1985-07-24 Dsf Waermeanlagenbau Verfahren und anordnung zur aushaltung eines fremdkoerpers an einem brecher
GB2159306B (en) * 1984-05-22 1987-08-05 De Beers Ind Diamond Crusher gap setting
EP0190241B1 (de) * 1984-08-03 1988-11-17 Bühler AG Mahlspaltverstellvorrichtung für müllereiwalzenstühle
SU1278017A1 (ru) * 1984-12-17 1986-12-23 Labkovskij Boris A Способ обработки глины
US4759509A (en) * 1985-08-15 1988-07-26 Combustion Engineering, Inc. Supermill journal spring system
DD268891A1 (de) * 1987-02-19 1989-06-14 Dessau Zementanlagenbau Veb Verfahren zur vor- bzw. feinzerkleinerung mineralischer rohstoffe in einer walzenmuehle
DE3815002A1 (de) * 1988-05-03 1989-11-16 Krupp Polysius Ag Gutbett-walzenmuehle
US5226604A (en) * 1989-04-07 1993-07-13 Salzgitter Maschinenbau Gmbh Method of and apparatus for adjusting comminuting machines
DE3922638A1 (de) * 1989-07-10 1991-01-17 Kloeckner Humboldt Deutz Ag Zweiwalzenmaschine wie z.b. walzenpresse insbesondere zur druckzerkleinerung koernigen gutes, und verfahren zum betrieb einer solchen walzenmaschine
US5253816A (en) * 1989-07-20 1993-10-19 Krupp Polysius Ag Material crushing roller construction
DE3930773A1 (de) * 1989-09-14 1991-03-28 Krupp Industrietech Walzenbrecher mit fest- und loswalze
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US5203188A (en) * 1991-09-16 1993-04-20 Morgan Construction Company System and method for monitoring a rolling mill

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171332A (en) * 1985-02-21 1986-08-28 Craven Fawcett Limited Grinding machine
EP0405102A1 (de) * 1989-06-28 1991-01-02 Krupp Polysius Ag Verfahren und Vorrichtung zum Zerkleinern von Mahlgut

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694508A1 (fr) * 1992-08-07 1994-02-11 Kloeckner Humboldt Deutz Ag Procédé et installation pour traiter par compression des produits granuleux.
DE4414366A1 (de) * 1994-04-25 1995-10-26 Krupp Polysius Ag Verfahren zur Regelung des Hydraulikdrucks

Also Published As

Publication number Publication date
EP0574718A3 (da) 1994-03-23
DE4219886A1 (de) 1993-12-23
KR940000153A (ko) 1994-01-03
US5383610A (en) 1995-01-24
ZA933537B (en) 1993-12-10
TW226340B (da) 1994-07-11

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