EP0916407B1 - Verfahren zur Herstellung einer Mahlwalze - Google Patents
Verfahren zur Herstellung einer Mahlwalze Download PDFInfo
- Publication number
- EP0916407B1 EP0916407B1 EP98120943A EP98120943A EP0916407B1 EP 0916407 B1 EP0916407 B1 EP 0916407B1 EP 98120943 A EP98120943 A EP 98120943A EP 98120943 A EP98120943 A EP 98120943A EP 0916407 B1 EP0916407 B1 EP 0916407B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- hard
- tyre
- build
- welding
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000003801 milling Methods 0.000 title description 2
- 239000000463 material Substances 0.000 claims description 57
- 238000000227 grinding Methods 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910001339 C alloy Inorganic materials 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- -1 chromium carbides Chemical class 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 150000001247 metal acetylides Chemical group 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 239000010955 niobium Substances 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims 3
- 239000010439 graphite Substances 0.000 claims 3
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 229910000599 Cr alloy Inorganic materials 0.000 claims 1
- 239000011257 shell material Substances 0.000 description 24
- 229910001141 Ductile iron Inorganic materials 0.000 description 10
- 229910001018 Cast iron Inorganic materials 0.000 description 7
- 239000004568 cement Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
Definitions
- the invention relates to a method for manufacturing a grinding roller for the comminution of brittle regrinds in a material bed roller mill, according to the Preamble of claim 1.
- roller surfaces are straight very much with the brittle and abrasive grinding materials mentioned high demands both with regard to abrasion (Wear) and exposed to the pressures the roller shell will be used here every Grinding roller made of accordingly resistant and especially made of wear-resistant material.
- roller materials mainly include chilled cast iron as well Alloyed hard materials by cladding be applied to the base material. At this Crushing in a material bed roller mill causes this occurring on the roll surfaces or roll shells high pressures that after appropriate running or Operating times of the roller material, especially those of today mostly used surfaced roll shells tired especially near the surface, apart from the sometimes considerable wear. This material fatigue leads to the The service lives of these grinding rollers are limited; leave with it the roller shells also no longer regenerate sensibly.
- EP-B-563 564 there is therefore a material bed roller mill proposed to be used in the grinding rollers which according to the preamble of claim 1 are manufactured, i.e. which in particular a roller shell from a wear-resistant chilled cast iron, at which is among others from a highly wear-resistant bainitic Cast material can act.
- the special thing about this known grinding rollers is that on the Surface of the chill roll shell of each grinding roller Profiles in the form of welding beads made of wear-resistant Cladding material applied are. It has been shown that by this production the milling castors made of chilled cast iron with build-up welding a significantly higher compressive strength and thus longer life in terms of wear than with the above-mentioned weld-welded grinding rollers can be achieved.
- the chilled cast iron or the chilled cast iron material is a relative has brittle behavior.
- the latter can especially in the case of relatively intermittent or striking Shredding work or stress on the grinding rollers, as is especially the case with very brittle and large pieces Regrind is often the case, cause the hard cast material breaks spontaneously.
- it can already undesirable during the manufacture of the grinding rollers Breaks come; this can already happen with oneshrinking the roll cover onto the roll base due to shrinkage stresses happen.
- the invention is therefore based on the object Method of the prerequisite in the preamble of claim 1 Way to further improve in such a way that still relatively high wear and pressure resistance particularly high operational reliability of the roll shell (and thus the entire grinding roller) against breakage can be achieved.
- the roll shell consists of a ductile bainitic nodular cast iron with an elongation at break of 0.1 to 2.5% and a compressive strength of 1,000 to 1,800 MPa is produced, with a preferred maximum value of the aforementioned elongation at break is 2.0%.
- an elongation at break of the cast material and thus the roll shell of at least 0.5% i.e. an elongation at break from 0.5 to 2.5%, particularly preferably from 0.5 to 2.0%, and a compressive strength of 1,200 to 1,600 MPa selected.
- roller jacket has a hardness of 42 to 55 HRc, preferably 45 to 50 HRc, i.e. Rockwell hardness.
- a grinding roller are examples of typical below Called compositions.
- the roll shell i.e. for the real one Sheath body
- the hard overlay welding material is preferably one highly wear-resistant chrome-carbon alloy used, in addition to chrome carbides there are also special carbides form.
- the hard material can also thanks to highly wear-resistant tungsten carbide surfacing be formed.
- the roll shell can affect the material properties of ductile bainitic ductile iron by controlled cooling and / or heat treatment of the roll shell in the desired or required Way to be set.
- the invention manufactured grinding roller in a constructive or structural In terms of general terms and shape can be carried out in the same way as it is with Gutbett roll mills well known and also essentially is described in the mentioned EP-B 563 564.
- this grinding roller generally in two parts from the roller body (sometimes also as roller shaft referred to) and firmly attached to it Roll jacket exists.
- the roller body can manufactured in the usual way as a forged component be on which the roller shell, for example, by a removable shrink fit firmly and reliably attached becomes.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
- der erfindungsgemäße Walzenmantel besitzt eine ähnlich hohe Druckfestigkeit wie bekannte Walzen aus Hartgußwerkstoffen, ohne daß bei ihm jedoch Werkstoffermüdungen auftreten, mit der Folge einer besonders hohen Standzeit;
- die hohe Druckfestigkeit des duktilen bainitischen Sphärogusses erlaubt höhere Mahldrücke als bei auftragsgeschweißten Mahlwalzen;
- neben der ausgezeichneten Druckfestigkeit besitzt der aus dem duktilen bainitischen Sphäroguß hergestellte Walzenmantel besonders gute Zähigkeitseigenschaften, wodurch er besonders hohe Sicherheiten gegenüber einem spröden Versagen bzw. Sprödbrüchen aufweist;
- durch sinnvolle Variationen in der chemischen Analyse des Gußwerkstoffes sowie durch eine gesteuerte Abkühlung und/oder Wärmebehandlung des Walzenmantels nach dem Guß können die Werkstoffeigenschaften optimal den Beanspruchungen bei der Zerkleinerung in einer Gutbett-Walzenmühle angepaßt werden.
Claims (11)
- Verfahren zur Herstellung einer Mahlwalze für die Zerkleinerung von spröden Mahlgütern in einer Gutbett-Walzenmühle, in der zwei gegenläufig rotierende Mahlwalzen mit hohem Druck gegeneinandergedrückt werden, wobei auf einem Walzengrundkörper ein Walzenmantel fest aufgebracht und dieser Walzenmantel aus einem hochverschleißfesten bainitischen Gußwerkstoff hergestellt wird,
dadurch gekennzeichnet, daß der Walzenmantel aus einem duktilen bainitischen Sphäroguß mit einer Bruchdehnung von 0,1 bis 2,5 % und einer Druckfestigkeit von 1.000 bis 1.800 MPa hergestellt wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine Bruchdehnung des Walzenmantels von wenigstens 0,5 % und eine Druckfestigkeit von 1.200 bis 1.600 MPa gewählt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Walzenmantel mit einer Härte von 42 bis 55 HRc (Härte nach Rockwell) hergestellt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf der Außenumfangsfläche des Walzenmantels eine Oberflächenprofilierung aufgebracht wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Oberflächenprofilierung durch eine Auftragsschweißung von Hartwerkstoff auf die Außenumfangsfläche des Walzenmantels gebildet wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß auf die Außenumfangsfläche des Walzenmantels zunächst mehrere komplette Zusatzschichten aus Hartwerkstoff durch Auftragsschweißung aufgebracht und auf die äußerste Zusatzschicht die Oberflächenprofilierungen aus Hartwerkstoff ebenfalls durch Hartauftragsschweißung gebildet werden.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß als Hartauftragsschweißwerkstoff eine hochverschleißfeste Chrom-Kohlenstoff-Legierung verwendet wird, in der sich neben Chromkarbiden noch Sonderkarbide ausbilden.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß der Hartauftragswerkstoff durch eine Hartlegierung mit - in Gew-% - 5,0 % Kohlenstoff, 3,0 % Mangan, 1,5 % Silizium, 22,0 % Chrom, 7,2 % Niobium und 0,5 % Vanadium gebildet wird.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der Hartwerkstoff durch hochverschleißfeste Wolframkarbid-Auftragsschweißungen gebildet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für die Herstellung des Walzenmantels ein bainitischer Sphäroguß aus einer Gußlegierung mit - in Gew-% - 3,0 - 3,5 % Kohlenstoff, 1,5 - 2,0 % Silizium, 0,3 - 0,4 % Mangan, 0,05 % Phosphor, 1,5 - 4,0 % Nickel, 0,7 - 1,0 % Molybdän und 0,04 - 0,07 % Magnesium ausgewählt wird.
- Verfahren nach Anspruch 1 oder 10, dadurch gekennzeichnet, daß die Werkstoffeigenschaften des bainitischen Sphärogusses durch gesteuerte Abkühlung und/oder Wärmebehandlung des Walzenmantels eingestellt werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19750144A DE19750144A1 (de) | 1997-11-12 | 1997-11-12 | Verfahren zur Herstellung einer Mahlwalze |
| DE19750144 | 1997-11-12 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0916407A1 EP0916407A1 (de) | 1999-05-19 |
| EP0916407B1 true EP0916407B1 (de) | 2002-04-03 |
| EP0916407B2 EP0916407B2 (de) | 2005-08-03 |
Family
ID=7848513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98120943A Expired - Lifetime EP0916407B2 (de) | 1997-11-12 | 1998-11-04 | Verfahren zur Herstellung einer Mahlwalze |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6203588B1 (de) |
| EP (1) | EP0916407B2 (de) |
| BR (1) | BR9804606A (de) |
| DE (2) | DE19750144A1 (de) |
| DK (1) | DK0916407T4 (de) |
| ES (1) | ES2174373T5 (de) |
| ZA (1) | ZA9810026B (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013104098A1 (de) | 2013-04-23 | 2014-10-23 | Thyssenkrupp Industrial Solutions Ag | Vorrichtung zur Zerkleinerung von abrasiven Materialien |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060210061A1 (en) * | 2003-07-17 | 2006-09-21 | Ulrich Hardebusch | Telephone handset and acoustic converter for one such telephone handset |
| DE102004043562B4 (de) * | 2004-09-09 | 2016-09-29 | Khd Humboldt Wedag Gmbh | Presswalzen-Ringbandage und Verfahren zu ihrer Herstellung |
| DE102006008115A1 (de) * | 2006-02-20 | 2007-08-30 | Siemens Ag | Mahlwerkzeug mit einer Beschichtung |
| US20100151268A1 (en) * | 2008-12-11 | 2010-06-17 | Flsmidth A/S | Wear-resistant hard surfacing method and article |
| DE102010024221A1 (de) * | 2010-06-18 | 2011-12-22 | Khd Humboldt Wedag Gmbh | Profilierte Bandage für eine Rollenpresse |
| JP5542104B2 (ja) * | 2011-08-09 | 2014-07-09 | 住友ゴム工業株式会社 | タイヤの耐摩耗性能を評価する方法 |
| US9375718B2 (en) | 2011-10-18 | 2016-06-28 | Diamond Power International, Inc. | Shaft-to-roller attachment for clinker grinder roller |
| CN103658551A (zh) * | 2013-11-27 | 2014-03-26 | 湖州中联机械制造有限公司 | 一种大型水泥磨机磨辊的制造方法 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2771358A (en) * | 1954-07-16 | 1956-11-20 | Int Nickel Co | Machine elements for crushers |
| DE1120242B (de) * | 1959-06-24 | 1961-12-21 | Hoesch Ag | Verfahren zum Aufbringen verschleissfester Schichten auf Walzen u. dgl. |
| DE3116227C2 (de) * | 1981-04-23 | 1983-12-01 | Kubota Ltd., Osaka | Verbundguß-Arbeitswalze und Verfahren zu ihrer Herstellung |
| US4396442A (en) * | 1981-05-15 | 1983-08-02 | Kubota Ltd. | Ductile cast iron roll and a manufacturing method thereof |
| FR2522291A1 (fr) * | 1982-03-01 | 1983-09-02 | Pont A Mousson | Tube centrifuge en fonte a graphite spheroidal et son procede de fabrication |
| US4541878A (en) * | 1982-12-02 | 1985-09-17 | Horst Muhlberger | Cast iron with spheroidal graphite and austenitic-bainitic mixed structure |
| US4484953A (en) * | 1983-01-24 | 1984-11-27 | Ford Motor Company | Method of making ductile cast iron with improved strength |
| FR2575683B1 (fr) * | 1985-01-04 | 1987-01-30 | Pont A Mousson | Procede et installation pour la fabrication continue de tuyaux en fonte a graphite spheroidal a structure controlee |
| US4880477A (en) * | 1988-06-14 | 1989-11-14 | Textron, Inc. | Process of making an austempered ductile iron article |
| DE3926232A1 (de) * | 1988-09-22 | 1990-03-29 | Kloeckner Humboldt Deutz Ag | Verschleissfeste walzenbeschichtung fuer die walzen von walzenpressen und verfahren zum aufbauen der walzenbeschichtung |
| JP2709103B2 (ja) * | 1988-11-28 | 1998-02-04 | 日本ピストンリング株式会社 | ロッカーアーム |
| DE3843173A1 (de) * | 1988-12-22 | 1990-07-05 | Kloeckner Humboldt Deutz Ag | Verschleissfeste oberflaechenpanzerung fuer die walzen von walzenmaschinen, insbesondere hochdruck-walzenpressen |
| DE4134134A1 (de) * | 1991-10-15 | 1993-04-22 | Castolin Sa | Verfahren zum beschichten von teilen aus gusseisen und dessen verwendung |
| DE4210395A1 (de) * | 1992-03-30 | 1993-10-07 | Krupp Polysius Ag | Walzenmühle |
| SE504707C2 (sv) * | 1995-07-14 | 1997-04-07 | Sandvik Ab | Kompositvalls med hårdmetall och gjutjärn |
-
1997
- 1997-11-12 DE DE19750144A patent/DE19750144A1/de not_active Withdrawn
-
1998
- 1998-11-03 ZA ZA9810026A patent/ZA9810026B/xx unknown
- 1998-11-04 EP EP98120943A patent/EP0916407B2/de not_active Expired - Lifetime
- 1998-11-04 ES ES98120943T patent/ES2174373T5/es not_active Expired - Lifetime
- 1998-11-04 DE DE59803601T patent/DE59803601D1/de not_active Expired - Lifetime
- 1998-11-04 DK DK98120943T patent/DK0916407T4/da active
- 1998-11-10 BR BR9804606-3A patent/BR9804606A/pt not_active IP Right Cessation
- 1998-11-11 US US09/189,667 patent/US6203588B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013104098A1 (de) | 2013-04-23 | 2014-10-23 | Thyssenkrupp Industrial Solutions Ag | Vorrichtung zur Zerkleinerung von abrasiven Materialien |
| WO2014173877A2 (de) | 2013-04-23 | 2014-10-30 | Thyssenkrupp Industrial Solutions Ag | Vorrichtung zur zerkleinerung von abrasiven materialien |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19750144A1 (de) | 1999-06-02 |
| EP0916407B2 (de) | 2005-08-03 |
| EP0916407A1 (de) | 1999-05-19 |
| DK0916407T4 (da) | 2005-12-12 |
| ZA9810026B (en) | 1999-05-05 |
| ES2174373T5 (es) | 2006-02-01 |
| BR9804606A (pt) | 1999-11-03 |
| ES2174373T3 (es) | 2002-11-01 |
| DE59803601D1 (de) | 2002-05-08 |
| US6203588B1 (en) | 2001-03-20 |
| DK0916407T3 (da) | 2002-07-29 |
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Owner name: SCHWAEBISCHE HUETTENWERKE GMBH Owner name: KRUPP POLYSIUS AG |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LAAG, RAINHARD DR. Inventor name: HERBST, HORST Inventor name: VOLK, THOMAS Inventor name: KRUEGER, JUERGEN Inventor name: RUEBBELKE, LUDGER DR.-ING. Inventor name: LUECKE, HELMUT DIPL.-ING. Inventor name: SCHROEDER, HEINZ DIPL.-ING. |
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