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EP0785024A1 - Dispositif de broyage de matières solides - Google Patents

Dispositif de broyage de matières solides Download PDF

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Publication number
EP0785024A1
EP0785024A1 EP97100086A EP97100086A EP0785024A1 EP 0785024 A1 EP0785024 A1 EP 0785024A1 EP 97100086 A EP97100086 A EP 97100086A EP 97100086 A EP97100086 A EP 97100086A EP 0785024 A1 EP0785024 A1 EP 0785024A1
Authority
EP
European Patent Office
Prior art keywords
wear resistance
blow bars
bars
blow
height
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
EP97100086A
Other languages
German (de)
English (en)
Other versions
EP0785024B1 (fr
Inventor
Jörg Berlinger
Heinz Reichenbach
Bruno Dipl.-Ing. Mayer
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.)
SWB Stahlformgussgesellschaft mbH
Original Assignee
SWB Stahlformgussgesellschaft mbH
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 SWB Stahlformgussgesellschaft mbH filed Critical SWB Stahlformgussgesellschaft mbH
Publication of EP0785024A1 publication Critical patent/EP0785024A1/fr
Application granted granted Critical
Publication of EP0785024B1 publication Critical patent/EP0785024B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor

Definitions

  • the invention relates to a device for comminuting solid masses with a housing and at least one rotor rotating in the housing, which is equipped with an even number of at least four blow bars arranged symmetrically on its circumference.
  • Devices of this type are used, for example, for impact crushing of mineral and secondary raw materials or in impact crushing for the preparation of construction waste and other residues, such as. B. slags used.
  • the blow bars each consist of the same wear-resistant or highly wear-resistant iron material.
  • the type of material of the blow bars and its wear resistance are selected depending on the properties of the materials to be broken, in particular their hardness, brittleness and geometry.
  • the blow bars are subject to considerable mechanical stress and, consequently, considerable wear. For this reason, it is provided in the known devices to replace the blow bars at certain time intervals.
  • the achievable breaking power depends essentially on the size of the respective device.
  • the selective portion of Coarse grain over fine grain to sand in the crushed material emerging from the device can be controlled via the individually adjustable width of the smallest gap between the blow bar and the lowest impact rocker assigned to the breaker housing.
  • Another possibility of influencing the breaking result in the known devices is to control the speed of the rotor.
  • the object of the invention is to improve a device of the type mentioned at the outset in terms of its use time between replacing the blow bars and in terms of its breaking result.
  • blow bars it is proposed to divide the blow bars into two groups.
  • One group of these blow bars namely the one with high wear resistance, has the task of carrying out the actual crushing work.
  • the other half of the blow bars one of which is arranged between two adjacent blow bars of high wear resistance, has the task of supporting the work of the blow bars of high wear resistance.
  • This support consists in crushing large-volume parts to be shredded before they can cause wear on the "work" battens with high wear resistance.
  • the lower wear resistance of the "support” battens leads to the fact that these blow bars wear out earlier than the "work” battens. This in turn has the consequence that the impact behavior achieved during the breaking process becomes more directed with increasing wear of the "support” battens.
  • the crushing process becomes gentler both with regard to the blow bars and with regard to the material to be shredded, so that the sand content in the shredded material becomes lower and the throughput of the device according to the invention increases. Because at the same time the "work" battens high wear resistance less wear are exposed and the "support” batters of lower wear resistance can be used up to a much greater degree of wear than is the case with the known rotor assemblies, the time between the replacement of the battens increases the service life of the device according to the invention.
  • a device of the type according to the invention which is optimized with regard to a breaking process which is gentle on the unused blow bars, is characterized in that the blow bars with high wear resistance have a greater height than the blow bars with lower wear resistance.
  • the "working" impact bars with high wear resistance project further from the base body of the rotor than the "supporting" impact bars, so that the impact process is more directed from the start than when the working height is the same. - and "support” battens is the case.
  • the height of the blow bars with low wear resistance is 70% to 90% of the height of the blow bars with high wear resistance.
  • the blow bars of high wear resistance should preferably be made of a highly wear-resistant iron material, a highly wear-resistant ductile iron material, a hard-tough, predominantly self-hardening iron material with a metal carbide content in the matrix or an iron ceramic Composite exist, which have hardness values between 45 HRc and 67 HRc.
  • the blow bars with lower wear resistance should consist of a hard-tough, self-hardening iron material or a tempered steel.
  • the iron material in question has a manganese content of 12-25% and a chromium content of 0.5-7%.
  • the blow bars in the device according to the invention should additionally be beveled in the area of their lateral ends at least on their free upper side in the direction of their transverse sides. In this way it is prevented that with increasing wear of the blow bars in the area of the blow bar ends protruding edges which hinder an exact setting of the gap between the blow bars and the lowest impact rocker attached to the crusher housing. It has been found in the practical testing of the device according to the invention that it is advantageous if the height of the bevel relative to the surface of the top of the blow bars and the length of the bevel measured in the extension of the surface of the top in a ratio of 1: 1 to 1 : 3 stand to each other.
  • blow bars in the device according to the invention are also made in two parts in a known manner.
  • a further improvement in the breaking result can be achieved in the device according to the invention by that the striking edge of the blow bars directed in the working direction is rounded to a radius which is at least 5 mm and is at most equal to half the width of the blow bar.
  • Such a rounding of the striking edge additionally supports the directional impact behavior which occurs when the device according to the invention is used. The more directed this impact behavior is, the lower the proportion of fine grain in the comminuted material.
  • the rounding of the edge reduces the risk of the edge breaking away prematurely.
  • a rotor 1 intended for use in a device (not shown) for comminuting construction waste has a total of four receptacles 3 which extend coaxially to the axis of rotation X of the rotor 1 and are formed in the base body 2 of the rotor 1 and in which blow bars 4, 5, 6 , 7 are releasably held via fasteners, not shown.
  • the blow bars 4, 5, 6, 7 are arranged symmetrically both with respect to the vertical V in FIG. 1 and with respect to the horizontal H shown in FIG. 1 such that the rear side R of the blow bars 4, 5 facing away from the direction of rotation D of the rotor 1 6.7 adjacent to the axes V, H respectively.
  • the opposing blow bars 4,6 are made of a highly wear-resistant, ductile iron material. These blow bars 4,6 high wear resistance are the "work" blow bars, which do the actual impact work.
  • the blow bar 5,7 form the "support" blow bars, which wear out earlier than the blow bars 4,6.
  • the "support" impact bars 5, 7 have a height h which projects freely over the circumference of the base body 2 of the rotor 1 and which is approximately 80% of the height h 'by which the impact bars 4,6 have high wear resistance over the circumference of the base body 2 of the rotor 1 protrude.
  • blow bars 4, 5, 6, 7 is chamfered in the area of the lateral ends E of their upper side O and their lower side U in the direction of the respective transverse side Q.
  • the ratio of the height by which the edge between the side surface Q and the beveled surface F lies deeper than the surface of the top side O and the length L of the inclined surface measured as a continuation of the surface of the top side O is 1: 3.
  • the striking edge S between the top O and the front F of the striking bars 4,5,6,7 is rounded in each case in a radius r which is at least 5 mm and at most equal to half the width B of the striking bars 4,5,6,7 is.
  • the blow bar assembly of the rotor 1 shown in FIG. 1 and explained above is particularly suitable for comminuting mineral raw materials, natural stone and for processing secondary raw materials, such as, for. B. clinker and construction waste.
  • the rotor 1 is equipped with “working” impact bars 20, 21, which consist of a highly wear-resistant, ductile iron material.
  • the "support” battens 22, 23, on the other hand, are made of a hard-tough, primarily self-hardening iron material with lower wear resistance.
  • Such blow bar equipment is particularly suitable for the processing of mineral raw materials, such as natural stone, and for the processing of secondary raw materials and construction waste without metallic components.
  • the rotor 1 with “working” impact bars 30, 31 made of highly wear-resistant iron material is more pronounced Ductility and equipped with "support” battens 32,33, which are made of a hard-tough, mostly self-hardening iron material.
  • Such blow bar equipment is particularly suitable for the preparation of unsorted construction waste with metallic components and the largest possible size of the mass parts to be shredded.
  • the "working" battens 40, 41 are finally made of a hard-tough, predominantly self-hardening iron material with a pronounced metal carbide content in the matrix, while the "support” battens are made of a self-hardening hard-tough material are made.
  • This assembly of the rotor 1 is particularly suitable for the preparation of heavily reinforced concrete when recycling construction waste.
  • blow bars 20-23.30-33.40-43 shown in FIGS. 2, 3, 4 agree in terms of their shape, their dimensions and their function with the blow bars 4, 5, 6, 7 explained in detail above, which are shown in FIGS Figure 1 are shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
EP97100086A 1996-01-12 1997-01-04 Dispositif de broyage de matières solides Expired - Lifetime EP0785024B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19600883 1996-01-12
DE19600883A DE19600883C1 (de) 1996-01-12 1996-01-12 Vorrichtung zum Zerkleinern von festen Massen

Publications (2)

Publication Number Publication Date
EP0785024A1 true EP0785024A1 (fr) 1997-07-23
EP0785024B1 EP0785024B1 (fr) 2000-03-08

Family

ID=7782581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100086A Expired - Lifetime EP0785024B1 (fr) 1996-01-12 1997-01-04 Dispositif de broyage de matières solides

Country Status (4)

Country Link
EP (1) EP0785024B1 (fr)
AT (1) ATE190246T1 (fr)
DE (2) DE19600883C1 (fr)
ES (1) ES2145520T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002034394A1 (fr) * 2000-10-28 2002-05-02 Alstom Power Boiler Gmbh Roue broyeuse pour broyeur a ventilateur
DE102008061580A1 (de) * 2008-07-25 2010-02-04 Gühring Ohg Schlagmesser und Mahlvorrichtung zum Zerkleinern von Kakaobohnen mit einem solchen Schlagmesser

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011113104B4 (de) * 2011-09-09 2018-04-26 Vautid Gmbh Verschleißbauteil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1508316A (fr) * 1966-11-23 1968-01-05 Blaw Knox Cie Fse Perfectionnements aux rotors de concasseurs, broyeurs à percussion
US3847362A (en) * 1974-01-16 1974-11-12 Allis Chalmers Rotor for impact crusher
US3880369A (en) * 1973-09-21 1975-04-29 Boehler & Co Ag Geb Impact strip for impact pulverizers
DE3244193A1 (de) * 1982-11-30 1984-05-30 Schwabenkies Egger GmbH & Co KG, 8901 Königsbrunn Prall-mahl-muehle
DE9405865U1 (de) * 1994-03-17 1994-06-01 Umwelt-Technics-Nord Gmbh, 22851 Norderstedt Prallbrecher

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911086C2 (de) * 1988-10-10 1994-10-20 Gronholz Claus Prallbrecher
DD293754A5 (de) * 1990-04-25 1991-09-12 Gisag-Ag Giesserei Und Maschinenbau Leipzig,De Verfahren zur herstellung von partiell verschleissgeschuetzten gussstuecken
DD295195A5 (de) * 1990-06-11 1991-10-24 Gisag Ag,Giesserei Und Maschinenbau Leipzig,De Verschleissfeste stahllegierung
DE4409037C2 (de) * 1994-03-17 1997-05-15 Umwelt Technics Nord Gmbh Verfahren zum Betrieb eines Prallbrechers und Meßmittel zur Durchführung des Verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1508316A (fr) * 1966-11-23 1968-01-05 Blaw Knox Cie Fse Perfectionnements aux rotors de concasseurs, broyeurs à percussion
US3880369A (en) * 1973-09-21 1975-04-29 Boehler & Co Ag Geb Impact strip for impact pulverizers
US3847362A (en) * 1974-01-16 1974-11-12 Allis Chalmers Rotor for impact crusher
DE3244193A1 (de) * 1982-11-30 1984-05-30 Schwabenkies Egger GmbH & Co KG, 8901 Königsbrunn Prall-mahl-muehle
DE9405865U1 (de) * 1994-03-17 1994-06-01 Umwelt-Technics-Nord Gmbh, 22851 Norderstedt Prallbrecher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002034394A1 (fr) * 2000-10-28 2002-05-02 Alstom Power Boiler Gmbh Roue broyeuse pour broyeur a ventilateur
DE102008061580A1 (de) * 2008-07-25 2010-02-04 Gühring Ohg Schlagmesser und Mahlvorrichtung zum Zerkleinern von Kakaobohnen mit einem solchen Schlagmesser
DE102008061580B4 (de) * 2008-07-25 2010-09-30 Gühring Ohg Schlagmesser und Mahlvorrichtung zum Zerkleinern von Kakaobohnen mit solchen Schlagmessern

Also Published As

Publication number Publication date
ATE190246T1 (de) 2000-03-15
EP0785024B1 (fr) 2000-03-08
DE59701199D1 (de) 2000-04-13
ES2145520T3 (es) 2000-07-01
DE19600883C1 (de) 1997-07-17

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