EP3700675B1 - Brechwalze eines walzenbrechers und verfahren zum herstellen einer brechwalze - Google Patents

Brechwalze eines walzenbrechers und verfahren zum herstellen einer brechwalze Download PDF

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Publication number
EP3700675B1
EP3700675B1 EP18789608.9A EP18789608A EP3700675B1 EP 3700675 B1 EP3700675 B1 EP 3700675B1 EP 18789608 A EP18789608 A EP 18789608A EP 3700675 B1 EP3700675 B1 EP 3700675B1
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EP
European Patent Office
Prior art keywords
crushing
roll
wear
plate
metal matrix
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.)
Active
Application number
EP18789608.9A
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German (de)
English (en)
French (fr)
Other versions
EP3700675A1 (de
Inventor
Baris Irmak
Daniel Evermann
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 AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
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Publication date
Application filed by ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Priority to PL18789608T priority Critical patent/PL3700675T3/pl
Publication of EP3700675A1 publication Critical patent/EP3700675A1/de
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Publication of EP3700675B1 publication Critical patent/EP3700675B1/de
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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
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers

Definitions

  • the invention relates to a crushing roller of a roller crusher with a plurality of crushing plates and a method for producing such a crushing roller.
  • crushers for the comminution of materials such as limestone, oil shale, marl, clay, oil sand or similar mineral materials.
  • Known roll crushers have two crushing rollers which rotate in opposite directions to one another and form a crushing gap between the crushing rollers.
  • the crushing rollers are usually formed from a plurality of crushing plates which are arranged circumferentially next to one another to form a crushing roller.
  • the crushing plates of the crushing rollers have crushing tools that are evenly spaced from one another, such as beater bars, hammers or crushing teeth. The crushing tools and the surface of the crushing rollers of a roller crusher are exposed to a high level of wear and must therefore be replaced regularly.
  • a hard metal layer such as tungsten carbide
  • Such a wear protection layer usually has a maximum thickness of 6 mm, with the application of a thicker layer not being technically possible.
  • the object of the present invention to provide a crushing roller with a crushing plate which has little wear, with frequent wear Replacing the crushing tools or the crushing plates is avoided.
  • the task is to provide a crushing roller that can be manufactured as simply and inexpensively as possible.
  • this object is achieved by a device with the features of the independent device claim 1 and by a method with the features of the independent method claim 11.
  • a crushing roller of a roller crusher for comminuting mineral material has a plurality of crushing plates which form the outer surface of the crushing roller.
  • a plurality of crushing tools are attached to each crushing plate.
  • the at least one crushing plate is formed from a metal matrix composite material which has a wear protection insert made from a hard metal and / or from ceramic.
  • a roller crusher preferably comprises two counter-rotating crushing rollers which are arranged next to one another.
  • a grinding gap is formed between the crushing rollers in which material such as limestone, marl, clay, oil shale or oil sand is crushed.
  • Each crushing roller is formed from a plurality of crushing plates, which are, for example, each formed in the shape of a partial circular ring and are arranged circumferentially next to one another to form a crushing roller and connected to one another, so that the crushing plates form the surface of the crushing roller.
  • the crushing plates are preferably arranged around a drive shaft and fastened to this.
  • a plurality of crushing tools, which are used to crush the material, are attached to each crushing plate.
  • the breaking tool is, for example, a striking bar, a breaking tooth, or an impact element such as a hammer of a hammer breaker.
  • the breaking tool is attached in particular to a breaking roller of a roller crusher, the breaking roller, for example, having a plurality of recesses in its surface, in each of which a breaking tool is attached.
  • the material to be crushed is, for example, mineral crushed goods such as oil sand, coal and ores such as iron ore and nickel ore or cement clinker.
  • a metal matrix composite material is to be understood as a material made of a metal matrix material such as steel, for example, into which the wear protection insert made of a hard metal and / or ceramic is cast.
  • the wear protection insert is formed in particular from a more wear-resistant material than the metal matrix material.
  • the crushing plate is preferably formed in one piece from the metal matrix composite material, in particular it is cast.
  • a metal matrix composite material with a wear protection insert made of a hard metal and / or ceramic offers the advantage of a high wear resistance of the crushing plate.
  • the production of the crushing plates from the metal matrix composite is comparatively simple and inexpensive, with the wear protection insert being able to be positioned in the area of the crushing plate where the greatest wear is to be expected.
  • each breaking plate has a plurality of wear protection inserts.
  • the wear protection inserts are of identical design and are arranged next to one another in such a way that they at least partially form the surface of the crushing plate.
  • the wear protection inserts are preferably designed in the form of plates. Plate-shaped wear protection inserts are particularly easy to manufacture, with almost any surface structure of the crushing plate being able to be formed by arranging a plurality of wear protection inserts, for example of different sizes, next to one another.
  • the crushing plates are produced by a casting process.
  • the wear protection insert is preferably positioned in the mold for casting the crushing plates.
  • the casting mold is then filled with the metal matrix material which at least partially or completely encloses the wear protection insert. Casting the crushing plates offers a particularly simple way of producing the crushing plates, and these can be produced in large numbers.
  • the wear protection insert comprises tungsten carbide, ceramic, titanium carbide, boron carbide, niobium carbide or chromium carbide or a mixture of these materials.
  • the wear protection insert is preferably produced from a powdery and / or granular mixture of the materials mentioned, the mixture being heated, in particular gassed and baked. In particular, the mixture is heated in a, for example, flexible form which corresponds to the negative form of the wear protection insert. The mixture is then cooled and hardened to form a porous structure the end.
  • the wear insert is formed in one piece and is positioned in the casting mold for producing the crushing plate after the production method described above has been carried out.
  • the metal matrix material is, for example, high-temperature resistant steel and / or a steel with a hardness of approximately 150-400 HB (Brinell).
  • a high-temperature-resistant steel is to be understood as meaning a heat-resistant steel with a high chromium-nickel content, which has a temperature resistance of up to 650.degree. C., in particular up to 1000.degree.
  • the wear protection insert is at least partially cast into a metal matrix material.
  • the metal matrix material is preferably infiltrated into the porous structure of the wear protection insert and encloses the wear protection insert.
  • the wear protection insert preferably has a thickness of 10-200mm, in particular 20-100mm, preferably 30-50mm.
  • At least one wear protection insert is formed in the shape of a part of a circle. This enables a plurality of wear protection inserts to be arranged circumferentially next to one another, so that the surface of the crushing plate is at least partially or completely formed by the wear protection inserts.
  • the crushing roller has a holder for receiving a breaking tool, the holder being formed from a metal matrix composite material which has a wear protection insert made from a hard metal and / or from ceramic.
  • the holder is preferably designed in one piece with the crushing plate. It is also conceivable that the hardness from the breaker plate is glued, welded, soldered or screwed.
  • the wear protection insert is preferably attached to the surface of the holder. In particular, the wear protection insert is arranged on the side surface of the holder pointing outward in the radial direction of the crushing roller. The surface of the holder is also exposed to high wear during operation of the roll crusher due to the impact of the material to be crushed.
  • the formation of the holder from a metal matrix composite material enables improved wear protection, particularly in the areas of the surface of the holders that are subject to heavy wear.
  • the breaking tool is formed from a metal matrix composite material which has a wear protection insert made from a hard metal and / or from ceramic.
  • the breaking tool is preferably designed in one piece and produced by a casting process. It is also conceivable that the breaking tool has two segments, for example a fastening segment and a wear segment attached to it, at least the wear segment being formed from a metal matrix composite material. The wear segment forms the radially outer area of the breaking tool, with at least the tip comprising a wear insert.
  • the wear protection insert is produced from a powdery and / or granular mixture of hard metal and / or ceramic by means of heating before it is positioned in the casting mold.
  • the cooled wear protection insert is then fastened, in particular in the casting mold, and enclosed with the metal matrix material.
  • Fig. 1 shows a roller crusher 11 with two crushing rollers 1 which are arranged next to one another and wherein a crushing gap 26 is formed between the crushing rollers 1, in which the material is crushed.
  • the crushing rollers 1 each comprise a plurality of crushing plates 10, which form the surface of the crushing roller 1 and are arranged circumferentially next to one another.
  • each of the crushing rollers 1 has six crushing plates 10.
  • the crushing plates 10 each have a plurality of crushing tools 12 on their surface, which are arranged circumferentially on the respective crushing roller 1 and are evenly spaced from one another.
  • a plurality of holders 16 are arranged on the surface of the breaking plates 10, in particular welded, screwed or formed in one piece with the breaking plate 10, a breaking tool 18 being attached to each holder 16.
  • Each holder 16 has a recess in each of which a breaking tool 18 is fastened.
  • the recesses in the holders 16 are arranged in particular in such a way that the breaking tools 12 are aligned at an angle of approximately 30-60 °, preferably 45 °, to the radial line of the breaking roller 1.
  • the crushing rollers 1 rotate in opposite directions to one another in the direction of the arrow. The material to be crushed is fed into the crushing gap 26 from above and crushed in the crushing gap 26.
  • Fig. 2 shows a crushing plate 10 with a plurality of crushing tools 18.
  • the crushing plate 10 is designed, for example, in the shape of a partially circular arc and has eight crushing tools 18, which are attached to the surface of the crushing plate 10 offset from one another.
  • two breaking tools 18 are arranged next to one another in the circumferential direction of the breaking roller, so that four rows running in the circumferential direction, each with two breaking tools, are arranged axially one behind the other.
  • the breaking tools 18 are each fastened to the breaking plate 10 by means of a holder 16.
  • the brackets 16 are designed in one piece with the breaking plate 10 in a materially bonded manner, in particular welded, connected to the breaking plate 10.
  • the circumference of the crushing plate 10 is reinforced over the width of the brackets 16, so that the diameter of the crushing roller is increased.
  • the crushing plate 10 therefore has a step-shaped profile in the axial direction, the individual steps extending in the circumferential direction.
  • the crushing plate 10 is formed from a metal matrix composite material and comprises a wear protection insert 14 and a metal matrix 12.
  • the wear protection insert 14 is preferably at least partially embedded in the metal matrix 12.
  • the crushing plate 10 includes FIG Fig. 2 a plurality of wear protection inserts 14, which are formed in the shape of a part of a circle.
  • the wear protection inserts have, for example, a thickness of 10-200 mm, in particular 20-100 mm, preferably 30-50 mm, are designed in the form of strips and are arranged next to one another in the axial direction.
  • the crushing plate 2 has, for example, ten wear protection inserts 14, each of which has the same width and thickness, the width corresponding, for example, to the width of a step, in particular the width of a holder 16. It is also conceivable that the crushing plate has only one wear protection insert which extends over the surface of the crushing plate. The entire surface of the crushing plate 10 is preferably covered with at least one or more wear protection inserts 14.
  • the wear protection inserts 14 are each formed in one piece, for example, and comprise a hard metal such as tungsten carbide, titanium carbide, boron carbide or chromium carbide or ceramic or a combination of these materials and has a porous or honeycomb structure.
  • the wear protection insert is preferably produced from a powdery and / or granular mixture of the above-mentioned materials, the mixture being heated, in particular gassed and baked. In particular, the mixture is heated in a, for example, flexible form which corresponds to the negative form of the wear protection insert. The mixture then cools down and hardens to form a very wear-resistant body with a porous structure.
  • the metal matrix material is, for example, high-temperature resistant steel and / or a steel with a hardness of approximately 150-400 HB (Brinell).
  • a high-temperature-resistant steel is to be understood as meaning a heat-resistant steel with a high chromium-nickel content, which has a temperature resistance of up to 650.degree. C., in particular up to 1000.degree.
  • Such steels are, for example, austenitic chrome-nickel steels, such as GX25CrNiSi18-9, GX40CrNiSi25-12, GX40NiCrSiNb35-26.
  • High temperature resistant steels up to 600 ° C are, for example, steels according to DIN EN 10213.
  • High temperature resistant steels up to 1200 ° C are, for example, steels according to DIN EN 10295.
  • the wear protection inserts 14 are at least partially or completely enclosed by the metal matrix material 12.
  • the crushing plate 10 has an upper, radially outwardly pointing region which comprises the wear protection insert 14 embedded in the metal matrix material 12 and a radially inwardly pointing region which exclusively has the metal matrix material 12.
  • the wear protection insert 14 made of ceramic or hard metal, such as tungsten carbide, titanium carbide, boron carbide, niobium carbide or chromium carbide or a mixture of these materials, is positioned, for example fastened, in a casting mold for casting the wear protection unit 14.
  • the wear protection insert 14 has a plate shape, for example, and is positioned on the top of the crushing plate 10.
  • the breaking plate 10 is then cast from the metal matrix material so that the wear protection insert 14 is at least partially enclosed by the casting material, namely the metal matrix material 12, the casting material infiltrating into the porous structure of the wear protection insert 14, for example. In particular, the wear protection insert 14 is completely enclosed by the casting material.
  • the crushing tools 18 are aligned at an angle of approximately 30-60 °, preferably 45 °, to the radial line of the crushing roller and are each received in a holder 16.
  • the brackets 16 also have, for example, at least one wear protection insert 14 and are also formed from the metal matrix composite material.
  • the wear insert 14 is arranged on the rear side of the holder 16, in particular on the radially outwardly facing surface of the holder 16.
  • the region of the holder 16 pointing in the direction of the crushing plate 10 is formed exclusively from the metal matrix material 12, the radially outwardly pointing region of the holder 16 being formed from the metal matrix composite material and including the wear protection insert 14.
  • FIG. 10 shows a sectional view of the crushing plate 10 of FIG Fig. 2 .
  • the Fig. 3 shows two wear protection inserts 14 on the surface of the crushing plate 10, each of which rests on a holder 16.
  • the holder 16 is formed in one piece with the crushing plate and has a bore 20 which extends at an angle of approximately 30-60 °, preferably 45 °, to the radial line of the crushing roller.
  • the breaking tool 18 is arranged on the side surface of the holder 16 pointing in the direction of rotation of the breaking roller.
  • the breaking tool preferably has a fastening segment 22 which is connected to the holder 16 and a wear segment 24 which protrudes from the holder 16 and is connected to it crushing material comes into contact.
  • the fastening segment 22 has a shaft which is fastened, for example screwed, in the bore 20 of the holder 16.
  • the wear area 24 is essentially tooth-shaped and is, for example, made in one piece with the fastening area or connected with a material fit, in particular welded.
  • the breaking tool 18 is preferably formed from a metal matrix composite material, a wear protection insert 14 being arranged on the surface, in particular at the tip of the breaking tool 18, and the breaking tooth being cast from the metal matrix material.
  • only the wear segment 24 of the breaking tool 18 is formed from a metal matrix composite material, with one or more wear protection inserts being arranged on the surface of the wear segment 24 facing in the direction of rotation and being at least partially enclosed by the metal matrix material.
  • the wear segment 24 and the fastening segment 22 are, for example, screwed to one another or connected to one another in a materially bonded manner, for example by welding.
  • Fig. 4 shows a crushing tool 18 for attachment to a crushing plate 10 of a crushing roller.
  • the breaking tool 18 has a fastening segment 22 and a wear segment 24, which are connected to one another and form the breaking tool 18.
  • the fastening segment 22 can be fastened to a crushing roller of a roller crusher and has a shaft.
  • the shaft of the fastening segment 22 forms one end of the breaking tool 18 and is fastened, for example, in the surface of the breaking plate 10 or on a holder 16 attached to the breaking plate 10.
  • the shaft is preferably completely in the surface of the crushing plate or in a holder 16 attached to the crushing plate 10 according to FIG Fig. 2 arranged.
  • the shaft has a plurality of diameters which are used to fasten the shaft, for example in a bore 20 in the surface of the crushing plate. It is also conceivable that the shaft has a thread for fastening in the bore 20 or the holder 16 on the surface of the breaking plate 10.
  • the shaft can have a constant diameter and is attached to the breaker plate or a holder 16 by means of a material connection, such as welding, gluing, or soldering.
  • the wear segment 24 and the fastening segment 22 are connected to one another, for example, via a material connection, such as soldering, welding or gluing.
  • the wear segment 24 preferably protrudes at least partially or completely from the surface or the holder 16 of the crushing plate 10 and is exposed to wear through contact with the material to be comminuted.
  • the fastening segment 22 can formed in one piece with the wear segment 24 or a separate component which is formed from a more ductile steel compared to the wear segment 24.
  • a steel with a hardness of 90-500 HB (Brinell), preferably 120-350 HB, in particular 150-200 HB, and preferably an elongation at break of about 18-26% is used.
  • the wear segment 16 is essentially tooth-shaped.
  • a frustoconical, hemispherical or the shape of a paraboloid are also conceivable, for example.
  • the outwardly pointing tip of the wear segment 24, for example approximately half of the wear segment 24, consists of the metal matrix composite material.
  • the wear protection insert 14 at least partially forms the surface, in particular the tip of the breaking tool 18, and is tooth-shaped.
  • the metal matrix composite material and the wear protection insert 14 are the ones already made with reference to FIG Fig. 2 and 3 described material.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
EP18789608.9A 2017-10-24 2018-10-18 Brechwalze eines walzenbrechers und verfahren zum herstellen einer brechwalze Active EP3700675B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18789608T PL3700675T3 (pl) 2017-10-24 2018-10-18 Walec kruszący kruszarki walcowej i sposób wytwarzania walca kruszącego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017219013.2A DE102017219013B3 (de) 2017-10-24 2017-10-24 Brechwalze eines Walzenbrechers und Verfahren zum Herstellen einer Brechwalze
PCT/EP2018/078472 WO2019081313A1 (de) 2017-10-24 2018-10-18 Brechwalze eines walzenbrechers und verfahren zum herstellen einer brechwalze

Publications (2)

Publication Number Publication Date
EP3700675A1 EP3700675A1 (de) 2020-09-02
EP3700675B1 true EP3700675B1 (de) 2021-12-01

Family

ID=63045903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18789608.9A Active EP3700675B1 (de) 2017-10-24 2018-10-18 Brechwalze eines walzenbrechers und verfahren zum herstellen einer brechwalze

Country Status (8)

Country Link
EP (1) EP3700675B1 (es)
CN (1) CN111263663B (es)
CA (1) CA3079295C (es)
DE (1) DE102017219013B3 (es)
ES (1) ES2904297T3 (es)
PL (1) PL3700675T3 (es)
PT (1) PT3700675T (es)
WO (1) WO2019081313A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019212715A1 (de) * 2019-08-26 2020-03-05 Thyssenkrupp Ag Gußtechnisch hergestelltes Sieb
CN112892740A (zh) * 2021-01-14 2021-06-04 广东韶钢松山股份有限公司 破碎辊
CN114472856B (zh) * 2022-04-14 2022-06-28 唐山贵金甲科技有限公司 钢渣处理破碎辊压机辊齿齿套及生产工艺

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE93384C (es) *
DE4123967A1 (de) 1991-07-19 1993-01-21 Krupp Industrietech Zweiwalzenbrecher mit auswechselbaren brechzaehnen
US8308096B2 (en) * 2009-07-14 2012-11-13 TDY Industries, LLC Reinforced roll and method of making same
CA2823354A1 (en) * 2010-12-29 2012-07-05 Flsmidth A/S Crushing body and method of making the same
EP2940169A1 (en) * 2014-04-30 2015-11-04 Sandvik Intellectual Property AB A wear resistant component and a device for mechanical decomposition of material provided with such a component

Also Published As

Publication number Publication date
PL3700675T3 (pl) 2022-04-11
CN111263663A (zh) 2020-06-09
WO2019081313A1 (de) 2019-05-02
CA3079295C (en) 2022-05-31
PT3700675T (pt) 2022-02-17
CA3079295A1 (en) 2019-05-02
EP3700675A1 (de) 2020-09-02
ES2904297T3 (es) 2022-04-04
DE102017219013B3 (de) 2018-08-23
CN111263663B (zh) 2022-05-17

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