EP3572153A1 - Broyeur à cylindres pourvu d'un racloir - Google Patents

Broyeur à cylindres pourvu d'un racloir Download PDF

Info

Publication number
EP3572153A1
EP3572153A1 EP18174238.8A EP18174238A EP3572153A1 EP 3572153 A1 EP3572153 A1 EP 3572153A1 EP 18174238 A EP18174238 A EP 18174238A EP 3572153 A1 EP3572153 A1 EP 3572153A1
Authority
EP
European Patent Office
Prior art keywords
blade
roll
roller
scraper
mill
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
EP18174238.8A
Other languages
German (de)
English (en)
Other versions
EP3572153B1 (fr
Inventor
Daniel Rickenbach
Daniel Mark
Phillipe HOLENSTEIN
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.)
Buehler AG
Original Assignee
Buehler 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
Priority to ES18174238T priority Critical patent/ES2823028T3/es
Application filed by Buehler AG filed Critical Buehler AG
Priority to EP18174238.8A priority patent/EP3572153B1/fr
Priority to CA3101384A priority patent/CA3101384C/fr
Priority to JP2020565877A priority patent/JP6980135B2/ja
Priority to US17/058,423 priority patent/US11618034B2/en
Priority to KR1020207036746A priority patent/KR102318276B1/ko
Priority to BR112020023605-5A priority patent/BR112020023605B1/pt
Priority to CN201980046406.4A priority patent/CN112423889A/zh
Priority to AU2019272925A priority patent/AU2019272925B2/en
Priority to PCT/EP2019/063624 priority patent/WO2019224395A1/fr
Priority to MX2020012565A priority patent/MX2020012565A/es
Priority to RU2020142827A priority patent/RU2754044C1/ru
Publication of EP3572153A1 publication Critical patent/EP3572153A1/fr
Application granted granted Critical
Publication of EP3572153B1 publication Critical patent/EP3572153B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C4/40—Detachers, e.g. scrapers
    • 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

Definitions

  • the invention relates to a roller mill with a scraper according to the independent claim.
  • Cambered rolls are used in roll mills to counteract bending of the roll in operation, which is caused by the high contact forces that prevail when grinding ground material. It is thus ensured that the grinding gap has a uniform Mahlspaltbreite in operation.
  • a scraper is arranged, which is used for stripping of grinding material application.
  • the scraper is to ensure that regrind does not adhere to the roller, since such adhesion of regrind is undesirable in many respects.
  • regrind that sticks to the roll causes it to narrow again when passing through the refining gap, which can lead to unwanted vibrations and vibrations.
  • the adhering material to be ground is even more compressed and compacted, so that the removal of material adhering to the roller with a scraper is made more difficult. This is adversely affected by the high temperatures prevailing during grinding, which cause drying and "caking" of regrind.
  • adherent regrind provides a better adhesion surface for further millbase and favors the growth of such Mahlgutanhaftept. In the worst case, the roller must be stopped and laboriously freed from encrustations manually.
  • scrapers which have a blade with a resting state, or in the undeformed state, straight stripper edge, which is firmly clamped in a holder becomes.
  • the bracket is pivotally mounted below the roller, immediately after the nip, and is pressed against the roller in use by means of a counterweight which is attached to a bracket of the bracket.
  • the blade is aligned with the quiescent roll and the fixture is then bent in the center, which coincides with the center of the roll, by means of a pulling device (which often serves as a counterbalancing boom) to balance the roll's camber.
  • a pulling device which often serves as a counterbalancing boom
  • Such a scraper is in the EP 0 040 432 EP.
  • the roller mill comprises a housing with a Mahlguteinlass, at least one Mahlgutauslass and at least two cambered rollers, which are each arranged rotatably about a roll axis in the housing.
  • At least one roller is associated with a scraper.
  • a plurality of rollers preferably all rollers of the roller mill are equipped with a scraper.
  • a roller can be assigned to a plurality of scrapers.
  • the scraper comprises a blade for stripping ground material from a roll surface.
  • the blade has a scraper edge which extends the full length of the blade.
  • the length of the blade preferably corresponds substantially to the axial length of the roller so that the entire roller surface can be scraped off with one blade.
  • a segmented blade, consisting of several elements which can strung together stripping the entire roll surface, is also conceivable.
  • the scraper further comprises a holder with a receiving area, wherein the holder is arranged tiltable about an axis parallel to the roll axis in the housing.
  • the holder, and hence the blade can be removed from the roll surface by tilting, for example when no grinding operation is performed to protect the blade and the roll surface.
  • an elastic bearing is arranged between the blade and the receiving area according to the invention.
  • the blade Due to the elastic support in the receiving area of the blade is achieved that the blade is not firmly clamped in the holder, but a movement of the blade is made possible relative to the holder.
  • the blade touches the roll surface, it is bent and conforms to the roll surface, so that a crown and a bending or thermal expansion arising during operation of the roll can be compensated.
  • the elastic bearing is arranged on the side of the blade, which is in operation of the roller mill, when the blade touches the roller surface, which is loaded on pressure, so the roller is facing away.
  • the blade can thus be designed such that a bend for adaptation to the roll surface is possible, but for other bending moments, in particular bending moments parallel to the roll axis, is rigid, so that flutter of the blade is avoided in operation.
  • the support is arranged on the roll mill such that upon movement of the roll axis (e.g., a setback), the axis of the support remains parallel to the roll axis.
  • the receiving area is formed as a groove, wherein at least between a groove wall and the blade an elastic bearing is arranged.
  • the thickness of the bearing (on one or both sides of the blade) is within the scope of the invention typically between 2 and 10 mm.
  • the wall of the groove is referred to, which extends in the depth direction of the groove.
  • groove bottom is in the context of the present invention the wall of the groove, which faces away from an open side of the groove, which coincides with a lateral surface of the holder.
  • the groove is preferably formed as a groove with two mutually parallel groove walls and a flat groove bottom, which is arranged perpendicular to the groove walls.
  • an elastic bearing is arranged between the blade and both groove walls.
  • Such an embodiment allows bending of the blade on both sides, so that in order to allow the same freedom of movement as the above-described embodiment with only one elastic support, two half as thick elastic supports must be arranged on both sides of the blade.
  • the blade is preferably on a groove bottom.
  • the blade and the at least one elastic bearing are held in a clamping profile, which is arranged in the receiving area.
  • the blade and the at least one elastic bearing are held in a clamping profile.
  • the clamping profile is then inserted into the receiving area and held there with holding means.
  • the clamping profile can be configured such that an elastic bearing is arranged on a profile wall (which corresponds to a groove wall) or on both profile walls.
  • the blade on a profile bottom invest in order to avoid slipping.
  • the blade and / or the holder and / or the clamping profile comprises lateral limiting means, which avoid a displacement of the blade in the axial direction with respect to the roller axis.
  • the blade is preferably designed as a flat profile, in particular with a rectangular cross-section.
  • the blade is preferably formed from a cold-rolled steel strip (eg in steel quality WB, without chrome and nickel, hardened, tempered and white-polished). Particularly preferred are blades with a tensile strength in the range of 1'550 - 2'350 MPa (measured according to EN 10132-1).
  • the thickness of the blade is typically 0.5 to 2 mm in the context of the invention.
  • the blade has a length to width ratio of 1.6: 1 to 300: 1.
  • blade length means the spatial extent of the blade in the extension direction of the wiper edge.
  • the length of the blade can be between 100mm and 3'000mm, preferably between 500mm and 2'500mm, more preferably between 1'000mmm and 2'000mm, for example 1'500mm.
  • the spatial extent is meant perpendicular to the blade length.
  • the width of the blade may be between 10mm and 60mm, preferably between 20mm and 55mm, more preferably 30mm and 50mm, for example 40mm.
  • the blade height is thus understood to mean the spatial extent of the blade perpendicular to the blade length and to the blade width, which extends from the wiper edge to an end facing away from the wiper edge.
  • the blade height typically, within the scope of the invention, between 10 and 30 mm of the total blade height are accommodated in the elastomeric bearing.
  • the blade has a height to free height ratio of 1: 1 to 6: 1.
  • the free height of the blade means the height dimension of the blade, which protrudes from the holder. Since the blade does not touch the holder, the free height is thus understood to mean the height dimension between the wiper edge and an (imaginary) envelope surface of the holder.
  • the blade is preferably arranged at an angle between 20 ° and 75 °, preferably between 30 ° and 60 °, more preferably between 30 ° and 50 ° to the roll surface when the blade touches the roll surface.
  • the angle is measured as the angle between a plane tangent to the roll surface and the height direction of the blade.
  • the blade Since the roller is cambered, the blade is bent according to the invention when touching the roller and consequently the angle varies slightly over the length of the blade, the reference angle used is the angle in the middle of the roller where the crown of the roller is maximum.
  • the elastic support may be formed of or include elastomeric materials, preferably selected from the group consisting of: natural rubber (NR); Styrene-butadiene rubber (SBR); Butyl rubber (IIR); Ethylene-propylene rubber (EPDM); Nitrile rubber (NBR); Chloroprene neoprene (CR); Chlorosulfonated polyethylene, Hypalon (CSM); Polyurethane rubber (AU, EU); Silicone rubber ((M) Q); Polyacrylate elastomer (ACM); hydrogenated nitrile rubber (H-NBR); Fluororubber, Viton (FPM); Polyurethane (PU). Particularly preferred are ethylene-propylene rubber (EPDM) and silicone rubber ((M) Q).
  • the elastic bearing is designed as an elastomer strip.
  • the storage in particular the elastomeric strip, can be formed continuously or interrupted over the entire length of the blade.
  • An interrupted training of the storage is possible and useful in particular for the individual adaptation of the rigidity of the resulting total storage.
  • a harder material may be intermittently arranged to achieve a total bearing hardness that corresponds to continuous support of a softer material.
  • the bearing in particular the elastomeric material of the elastomeric strip, has a hardness of between 15 and 100 Shore OO, preferably between 30 and 90 Shore OO, more preferably between 40 and 80 Shore OO (according to ASTM D 2240, and / or between 5 and 30 Shore A (measured according to DIN ISO 7619-1).
  • the density of the elastic storage can be between 0.25 g / cm 3 and 0.85 g / cm 3 , preferably 0.35 g / cm 3 and 0.75 g / cm 3 , particularly preferably 0.45 g / cm 3 and 0.65 g / cm 3 (according to DIN 53479 A ) amount.
  • Such an embodiment represents a very simple and cost-effective variant.
  • the strip can be replaced and the hardness can be adjusted.
  • the holder is preferably provided with a counterweight, by means of which the blade can be tilted about the axis and can be pressed against the roller surface.
  • the scraper is preferably in operative connection with a lift-off device, by means of which the blade can be tilted about the axis and moved away from the roll surface.
  • This embodiment allows removal of the blade from the roller surface when no grinding is taking place, and in particular is coupled to an actuator arrangement of the rollers so that upon engagement and / or disengagement of the rollers the blade is also brought into contact with the blade surface and / or this is moved away.
  • the blade is preferably arranged such that the wiper edge is parallel to the roll axis when the blade does not touch the roll surface.
  • the blade is preferably received over its entire length in the receiving area.
  • the elastic bearing is thus formed over the entire length of the blade.
  • the blade can be received only in sections in the receiving area and / or the elastic support may be formed only in sections over the length of the blade. It is understood that in such a case, in the areas without elastic support, the blade, if it does not touch the roll surface, must not touch the receiving area also.
  • FIG. 1 schematically a roll mill 1 according to the present invention is shown.
  • the roll mill 1 comprises a Housing 2 with a Mahlguteinlass, indicated by the arrow 3, and a Mahlgutauslass 4, also indicated by the arrow 4.
  • a housing 2 In the housing 2, two cambered rollers 5 and 5 'are arranged, which are each mounted rotatably about a roller axis 6 and 6' and are driven in opposite directions by means of a drive, not shown.
  • the direction of rotation of the rollers 5 and 5 ' is indicated in each case by an arrow.
  • each roller 5 or 5 ' is associated with a scraper 7 or 7'.
  • the scraper 7 of the roller 5 is in two possible variants separately in the Figures 2 and 3 shown.
  • the scraper 7 of the Figures 2 and 3 comprises a blade 8, which is formed from a flat metal profile with a length L, a width B and a height H.
  • the longitudinal direction of the blade 8 is indicated by the vector L.
  • the blade 8 is inclined at an angle .alpha. between a plane TE tangent to the roller surface 9 at the point of contact of the blade 8 and the blade 8, with a blade edge 8 having a pointed edge.
  • the stiffener 7 has a holder 11 which is arranged tiltable about an axis 13.
  • the axis 13 extends parallel to the roll axis 6 or 6 'and remains parallel to the roll axis 6 or 6', even if the roll axis is displaced, for example, with a setting of the rolls.
  • the holder 11 comprises a receiving region 12, which serves as a groove 15 with two parallel to one another extending groove walls 16 and 16 'and a groove bottom 17 extending perpendicular thereto extending in the longitudinal direction L of the blade 8 (and thus the holder 11).
  • the blade 8 is arranged in the groove 15 and contacts the groove bottom 17 with the end facing away from the wiper edge.
  • an elastomer strip 14 is arranged between the respective groove wall 16 or 16 'and the blade, so that the blade 8 in the groove 15 enjoys a certain freedom of movement and in particular bent by a bending moment parallel to the height of the blade 8 and can adapt to the crowning of the roller 5.
  • the free height of the blade 8 is referred to, which corresponds to the height of the blade 8, which is not disposed between the elastomeric strip 14.
  • the holder So that the blade 8 can be pressed against the roller surface 9, the holder 11, as already explained above, arranged tiltable about the axis 13.
  • the holder comprises a counterweight 19, which causes by leveraging the tilting of the holder 11 and the pressing of the blade 8 against the roller surface 9.
  • the Indian FIG. 3 shown scraper 7 corresponds in construction essentially the scraper 7 of FIG. 2 with the difference that the blade 8 and the elastomer strips 14 are arranged in a clamping profile 18, wherein the clamping profile 18 is inserted in the receiving region 12 of the holder 11.
  • the clamping profile 18 is formed as a plastic profile and has two mutually parallel profile walls 160 and 160 'and a perpendicular thereto profile bottom 170 which correspond in function to the groove walls 16 and 16' and the groove bottom 17.
  • the clamping profile 18 simplifies the placing of the blade 8 with the elastomer strip 14 in the receiving area 12th

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Cleaning In General (AREA)
  • Crushing And Pulverization Processes (AREA)
EP18174238.8A 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir Active EP3572153B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP18174238.8A EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir
ES18174238T ES2823028T3 (es) 2018-05-25 2018-05-25 Molino de rodillos con un rascador
PCT/EP2019/063624 WO2019224395A1 (fr) 2018-05-25 2019-05-27 Broyeur à cylindres pourvu d'un racloir
US17/058,423 US11618034B2 (en) 2018-05-25 2019-05-27 Roller mill with a scraper
KR1020207036746A KR102318276B1 (ko) 2018-05-25 2019-05-27 스크레이퍼를 갖는 롤러 분쇄기
BR112020023605-5A BR112020023605B1 (pt) 2018-05-25 2019-05-27 Moinho de cilindro com um raspador
CA3101384A CA3101384C (fr) 2018-05-25 2019-05-27 Broyeur a cylindres pourvu d'un racloir
AU2019272925A AU2019272925B2 (en) 2018-05-25 2019-05-27 Roller mill with a scraper
JP2020565877A JP6980135B2 (ja) 2018-05-25 2019-05-27 スクレーパを備えたローラミル
MX2020012565A MX2020012565A (es) 2018-05-25 2019-05-27 Molino de rodillos con raspador.
RU2020142827A RU2754044C1 (ru) 2018-05-25 2019-05-27 Вальцовая мельница со скребком
CN201980046406.4A CN112423889A (zh) 2018-05-25 2019-05-27 带有刮刀的辊磨机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18174238.8A EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir

Publications (2)

Publication Number Publication Date
EP3572153A1 true EP3572153A1 (fr) 2019-11-27
EP3572153B1 EP3572153B1 (fr) 2020-08-05

Family

ID=62386078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18174238.8A Active EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir

Country Status (12)

Country Link
US (1) US11618034B2 (fr)
EP (1) EP3572153B1 (fr)
JP (1) JP6980135B2 (fr)
KR (1) KR102318276B1 (fr)
CN (1) CN112423889A (fr)
AU (1) AU2019272925B2 (fr)
BR (1) BR112020023605B1 (fr)
CA (1) CA3101384C (fr)
ES (1) ES2823028T3 (fr)
MX (1) MX2020012565A (fr)
RU (1) RU2754044C1 (fr)
WO (1) WO2019224395A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN112403577A (zh) * 2020-10-21 2021-02-26 衡阳市大宇锌业有限公司 一种化工生产用原料处理的防粘料磨粉装置
CN112659412A (zh) * 2020-12-26 2021-04-16 安徽省腾越铝塑有限公司 一种铝塑碎片碾压分离装置及方法
WO2024013182A1 (fr) 2022-07-12 2024-01-18 Swisca Ag Broyeur à cylindres et racleur pour broyeur à cylindres

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CN113560015A (zh) * 2021-07-30 2021-10-29 李祥兴 一种医药生产用研磨装置
US20230129456A1 (en) * 2021-10-22 2023-04-27 Metso Outotec USA Inc. Roller crusher and method for operating thereof
US20230127300A1 (en) * 2021-10-22 2023-04-27 Metso Outotec USA Inc. Roller crusher and method for arrangement thereof
US11925942B2 (en) 2021-10-22 2024-03-12 Metso Outotec USA Inc. Roller crusher and method for operating thereof
US11938488B2 (en) * 2021-12-09 2024-03-26 Metso Outotec USA Inc. Roller crusher and method for operation thereof
CN114632597B (zh) * 2022-03-17 2023-04-11 福建省南仹生物科技有限公司 一种猪胆粉加工制备用粉碎装置

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DE3806651A1 (de) * 1988-03-02 1989-09-14 Buehler Ag Geb Walzwerk
EP0694374A2 (fr) * 1994-07-29 1996-01-31 HÄNDLE GmbH & CO. KG Racleur pour broyeur à rouleaux à broyage fin de matières premières pour produits céramiques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112403577A (zh) * 2020-10-21 2021-02-26 衡阳市大宇锌业有限公司 一种化工生产用原料处理的防粘料磨粉装置
CN112659412A (zh) * 2020-12-26 2021-04-16 安徽省腾越铝塑有限公司 一种铝塑碎片碾压分离装置及方法
CN112659412B (zh) * 2020-12-26 2023-08-29 安徽省腾越铝塑有限公司 一种铝塑碎片碾压分离装置及方法
WO2024013182A1 (fr) 2022-07-12 2024-01-18 Swisca Ag Broyeur à cylindres et racleur pour broyeur à cylindres

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AU2019272925B2 (en) 2021-11-04
ES2823028T3 (es) 2021-05-05
AU2019272925A1 (en) 2020-12-17
BR112020023605A8 (pt) 2021-08-17
RU2754044C1 (ru) 2021-08-25
US20210213456A1 (en) 2021-07-15
EP3572153B1 (fr) 2020-08-05
JP2021514836A (ja) 2021-06-17
CA3101384A1 (fr) 2019-11-28
CN112423889A (zh) 2021-02-26
BR112020023605A2 (pt) 2021-02-09
MX2020012565A (es) 2021-10-26
KR102318276B1 (ko) 2021-10-27
BR112020023605B1 (pt) 2021-09-21
KR20210005286A (ko) 2021-01-13
CA3101384C (fr) 2021-07-06
US11618034B2 (en) 2023-04-04
WO2019224395A1 (fr) 2019-11-28

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