EP0233978B1 - Vorrichtung zum Mahlen von schwer mahlbarem Gut - Google Patents

Vorrichtung zum Mahlen von schwer mahlbarem Gut Download PDF

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Publication number
EP0233978B1
EP0233978B1 EP86105261A EP86105261A EP0233978B1 EP 0233978 B1 EP0233978 B1 EP 0233978B1 EP 86105261 A EP86105261 A EP 86105261A EP 86105261 A EP86105261 A EP 86105261A EP 0233978 B1 EP0233978 B1 EP 0233978B1
Authority
EP
European Patent Office
Prior art keywords
grinding
drum
roll
rollers
grinding drum
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
Application number
EP86105261A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0233978A1 (de
Inventor
Harry Rollny
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.)
Rollny Harry
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86105261T priority Critical patent/ATE50159T1/de
Publication of EP0233978A1 publication Critical patent/EP0233978A1/de
Application granted granted Critical
Publication of EP0233978B1 publication Critical patent/EP0233978B1/de
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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
    • B02C15/123—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings with rings and interposed rollers

Definitions

  • the invention relates to a device for grinding material, such as coal, coke, cement and the like, as well as pastes and soft material, with a circular cylindrical grinding drum, with a grinding roller arranged axially in the same direction in the grinding drum and extending over the full length of the grinding drum, on both sides is rotatably mounted on the mill foundation, can be driven in rotation and, with its outer casing and the inner casing of the grinding drum, delimits an annular grinding chamber, and with a plurality of grinding rollers arranged circumferentially distributed in the grinding chamber, which are aligned axially parallel to the axis of the grinding drum or the grinding drum, also over extend the full length of the grinding drum and are rotatably supported on both sides at a mutual distance on a common grinding roller holder, the grinding roller holder being arranged stationary outside the grinding drum.
  • a device for grinding material such as coal, coke, cement and the like, as well as pastes and soft material
  • Such grinding devices which basically belong to the state of the art, make use of the principle of the rotary mill, in which, between rotating grinding bodies and a grinding track, the ground material can be comminuted to final fineness in one operation. It is known that usually walk, ball or hammer mills with a closed bottom are used for this.
  • the document US-A-739 492 describes a grinding device in which a spiked concentrically arranged central roller works with a plurality of spaced revolving rollers, the distances being adjustable, the inside of the common housing also having spikes and the grinding roller stationary outside the grinding drum is arranged.
  • Document DE-B-2 138 025 describes a grinding device for the fine grinding of flowable material, in particular for the production of color pigment dispersions, with a lying housing, to which the material is fed at one end by means of a conveying device and removed at the other end, with one arranged concentrically in the housing , circumferentially driven shaft and with a plurality of grinding rollers provided in the annular channel formed between the housing and the shaft, driven by the shaft with the same number of revolutions and interacting with the housing inner wall or the shaft surface, the grinding rollers being arranged adjacent to one another, so that each grinding roller with two adjacent grinding rollers is in contact and only a part of the grinding rollers is rotatably coupled to the shaft at both ends.
  • the remaining grinding rollers are free, i.e. are arranged in the ring channel between the drive shaft and the housing inner wall without any additional bearing and are carried along by the high-speed rotating drive shaft along circular paths.
  • the present invention has for its object to further develop a device of the type mentioned in such a way that it is capable of comminuting a wide variety of types, hardness and angularity to final grinding fineness in one operation with an uncomplicated structure and low energy consumption and low noise.
  • the grinding roller is pivotably mounted about an axis supported on the mill foundation and that the grinding rollers are also spaced from the outer jacket of the grinding roller and from the inner jacket of the grinding drum and every second grinding roller rotates counter to the grinding roller is drivable.
  • One embodiment is characterized in that the grinding roller holder has two arms with a substantially circular outer ring and a projection formed thereon with a tangential edge profile, on which the axis lying outside the ring of grinding rollers is arranged.
  • Another special embodiment is characterized in that an adjusting device is provided which is supported on the mill foundation and acts on the grinding roller-like side on the side opposite the axis.
  • the device according to the invention can stand on a vibrating table which supports the emptying and, if appropriate, also loading of the grinding drum, in particular when the material to be ground is of high fineness.
  • a vibrating table is particularly useful in order to prevent caking or sticking of certain ground materials and to achieve an excellent fine grinding result.
  • FIG. 1 shows a mill foundation 10 with which the device according to the invention stands on the floor.
  • This mill foundation can be a steel-welded construction.
  • the mill foundation 10 carries the lower half part 12 of a stationary grinding drum 13 in a fixed arrangement.
  • the upper half part 14 of the grinding drum 13 is flanged to the mill foundation 10 with screws 16.
  • the screws reach through lateral flanges 18 extending in the axial direction on the upper and lower half-parts 12, 14.
  • the half-parts 12, 14 are each semi-cylindrical and complement one another in the assembled state to form a full, circular-cylindrical grinding drum 13.
  • a grinding roller 22 is mounted in a coaxial arrangement on a bearing journal 20.
  • the grinding roller 22 is set in driven rotation by means of an electric motor 24 via a gear 26.
  • Its outer casing 28 is arranged at a distance from the inner casing 30 of the grinding drum 13.
  • an annular grinding chamber 32 is thus created in which a number of grinding rollers 34 work and comminute material that has been fed into the grinding drum 13.
  • the grinding roller 22 extends over the full axial length of the grinding drum 13.
  • FIG. 1 shows a ring of eight grinding rollers 34, which are arranged distributed over the circumference of the grinding chamber 32 at the same angular distance.
  • the grinding rollers 34 are spaced from each other as well as from the outer casing 28 of the grinding roller 22 and the inner casing 30 of the grinding drum. In general, an even number of grinding rollers 34 are preferably used. Every second grinding roller 34 is driven in rotation, which is indicated in FIG. 1 by teeth 36 on the corresponding grinding rollers 34.
  • the material to be ground is fed to the device through a filler neck 38.
  • This has a funnel-shaped shape and starts at the edge of a filling opening 39 of the grinding drum 13.
  • the filling opening 39 is located on the upper half part 14. It is laterally offset against the apex of the grinding drum 13, preferably in the direction of rotation of the grinding roller 22.
  • the grinding drum has several dispensing openings distributed over its circumference with associated discharge ports 40 through which the ground filling material is made the grinding drum 13 is outputted and transported further with a suitable transport device.
  • the discharge nozzles 40 are all located on the lower half part 12 of the grinding drum 13. In particular, two discharge nozzles 40 can be provided, which are arranged on both sides of the lower crown of the grinding drum with different angular misalignments.
  • a plurality of discharge nozzles on the grinding drum make it possible to selectively use one or the other for the discharge of ground material and thus to vary the path of the ground material through the device, in particular in order to influence the degree of fineness of
  • the run-up tracks 42 are in the form of ramps with a flat top, the latter extending parallel to the axis of rotation of the grinding roller 22 and grinding rollers 34 and forming a secant with respect to the grinding drum circle.
  • this can also be designed in the form of a wedge-shaped ramp or ramp from 0 mm to n mm and, as shown in FIG. 4, drop again to 0 mm (relaxation effect).
  • the regrind undergoes a new compaction / fine grinding with a slightly thicker / thicker contact surface.
  • the outer casing 28 of the grinding roller 22 and / or the inner casing 30 of the grinding drum 13 and / or the run-up tracks 42 can also be roughened, wavy or structured in some other way.
  • the cylindrical grinding roller 34 which can also have a structured surface.
  • a flat or structured surface of high wear resistance can be formed by a coating of appropriate material, which is preferably applied in an application spraying process.
  • the grinding rollers 34 are rotatably supported at both ends on a grinding roller holder 43.
  • the grinding roller holder 43 has two arms 44 with an essentially circular outer ring 46, the diameter of which is larger than that of the grinding ring, and an attachment 48 of an essentially triangular outline formed thereon with a tangential edge profile.
  • the arms 44 are arranged on the end outside of the grinding drum 13 and are pivotably mounted about a common axis 50 connected to the mill foundation 10.
  • the axis 50 passes through the shoulder 48 of the arms 44.
  • 52 is an adjusting device which is supported on the mill foundation 10 and engages on the grinding roller holder 43 on the side opposite the axis 50.
  • the arms 44 of the grinding roller holder 43 can be pivoted into the desired position and thus the position of the grinding rollers 34 in the grinding chamber 32 can be changed.
  • the cross section of the grinding path through which the material to be ground passes inside the grinding drum is varied, and changes according to the specific pressure acting on the regrind.
  • every second grinding roller 34 carries a pinion 56 on a section 54 of its axis protruding from the grinding drum.
  • the pinions 56 of all grinding rollers 34 mesh with a toothed ring 58 which is rigidly connected to the grinding roller 22 and rotates together with it.
  • the ring gear can be formed from the periphery of a large wheel, which sits on the common shaft 60 with the grinding roller 22.
  • the toothed ring can be an external toothing or an internal toothing on the grinding roller 22 or bodies firmly connected to it. Every second grinding roller 34 is driven in the opposite direction to the grinding roller 22 by the gear connection. This results in an advantageous material intake of the material to be ground and a good crushing effect.
  • the other grinding rollers 34 which are not directly connected to the grinding roller 22 in terms of gear, preferably rotate in the same direction of rotation as the grinding roller 22. Such a movement can be brought about by the material flow which passes through the grinding drum without a particular forced drive of these grinding rollers 34. However, one can also couple grinding rollers assigned to one another in pairs to drive them in opposite directions; in particular, the grinding rollers can carry two meshing gears for this purpose. In any case, the rotary drive of the grinding rollers 34 is derived directly or indirectly from the driven rotation of the grinding roller 22. An arrangement is recommended in which all intermeshing gears, ring gears and pinions are located outside the grinding drum and a housing, if appropriate, enclosing it.
  • the two arms 44 of the grinding roller holder 43 supporting the grinding rollers 34 are made pivotable by an amount which does not interrupt the gear coupling of the grinding roller 22 and grinding rollers 34.
  • the pinions 56 on the grinding rollers 34 always remain in engagement with the ring gear 58 on the grinding roller 22.
  • a helical toothing of ring gear 58 and pinion 56 is recommended.
  • the advantages of a helical toothing also lie in the better power transmission option at higher pressures and the resulting higher availability.
  • the helical toothing brings advantages in terms of material conservation and in terms of wear.
  • the device according to the invention is preceded by a metering system 62 which introduces regrind depending on its specific properties, coordinated according to weight, quantity and grinding speed.
  • the dosing system is located above the filler neck 38. It has a slide 64, by means of which the cross section of a passage opening for the material to be ground can be changed.
  • the slider 64 is preferably controlled electronically; in particular, a time control can be provided in which a timer 66 influences the slide position and in particular opens and closes the slide 64 at certain time intervals.
  • the input of material to be ground is controlled on the basis of the power consumption of the device; this can be driven in particular with more or less constant power consumption.
  • the removal of ground material from the grinding drum can also be controlled automatically.
  • a conveyor belt is provided in front of the outlet of the discharge nozzle 40, which takes over the ground material. The advance of this conveyor belt can be controlled depending on the quantity task, in particular on the basis of a signal from the timer 66.
  • the entire device according to the invention stands on a vibrating table 68.
  • This can be designed in particular for vibratory movements in two directions perpendicular to one another in a horizontal plane.
  • the vibration of the vibrating table effectively and effectively supports the addition and removal of goods and the grinding process itself. It also prevents the ground material from caking or sticking together.
  • reference numeral 13 denotes the grinding drum with the inner jacket 30.
  • the input opening is identified by 39 and the discharge openings are identified by 41a, 41.
  • the reference signs 42 denote the run-up tracks, of which the first run-up track is in the region of its greatest thickness, i.e. in its central area is weaker than the second run-up track.
  • the device according to the invention is characterized by universal application options. It is particularly suitable for crushing and grinding difficult-to-grind goods, e.g. B. of coal, coke, cement, broken ceramic, chalk, plastic granules, broken diamond, bauxite, glass, basalt, other products from the fields of stone, chemicals and the recycling industry. Granular goods can be ground as well as pastes and soft goods. Another area of application is the grinding of food.
  • the device makes it possible to grind the regrind according to the principle of the rotary mill in predominantly one work step to shred. For this purpose, the ground material is overflown several times between the grinding drum and the grinding roller and taken away.
  • the ground material Due to the changing cross-section of the grinding gap over the circumference of the grinding drum, the ground material is gradually crushed to the final grain size and subjected to a large number of alternating loads of higher and lower pressure, so that a multitude of comminution phases are actually obtained in one grinding process. Due to the counter-rotation of the pairs of grinding rollers, the rotation of the grinding roller within the grinding drum and the use of gravity with vibration support, excellent fine grinding results are achieved.
  • the device is low in noise during operation and saves energy. It enables high throughput and is characterized by a low-maintenance design, low wear, low spare parts inventory for the user, low costs in the usage phase and a long service life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP86105261A 1985-11-22 1986-04-16 Vorrichtung zum Mahlen von schwer mahlbarem Gut Expired - Lifetime EP0233978B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105261T ATE50159T1 (de) 1985-11-22 1986-04-16 Vorrichtung zum mahlen von schwer mahlbarem gut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853541279 DE3541279A1 (de) 1985-11-22 1985-11-22 Vorrichtung zum mahlen von gut
DE3541279 1985-11-22

Publications (2)

Publication Number Publication Date
EP0233978A1 EP0233978A1 (de) 1987-09-02
EP0233978B1 true EP0233978B1 (de) 1990-02-07

Family

ID=6286541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105261A Expired - Lifetime EP0233978B1 (de) 1985-11-22 1986-04-16 Vorrichtung zum Mahlen von schwer mahlbarem Gut

Country Status (3)

Country Link
EP (1) EP0233978B1 (enrdf_load_stackoverflow)
AT (1) ATE50159T1 (enrdf_load_stackoverflow)
DE (2) DE3541279A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022104455A1 (en) * 2020-11-17 2022-05-27 11559010 Canada Inc. Systems for providing centrifugal machines with grinding functionality

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3543794A1 (de) * 1985-04-17 1986-10-30 Urspruch, Hanelore, 4703 Bönen Vermahlungsanlage
KR100628374B1 (ko) 2004-11-18 2006-09-27 주식회사 토비이앤지 왕겨 분쇄장치
CN116078478B (zh) * 2023-03-02 2024-11-15 江苏旭鹏智能科技有限公司 固废处理装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE524601C (de) * 1928-12-15 1932-06-24 Paul R V Knuepffer Walzenmuehle zum Zerkleinern von Stoffen aller Art

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127693C (enrdf_load_stackoverflow) *
US554802A (en) * 1896-02-18 thomson
US739492A (en) * 1902-07-31 1903-09-22 Hiram C Groves Grinding-mill.
DE376146C (de) * 1921-10-21 1923-05-28 Max Cahn Mahlgang mit mehreren zwischen dem Aussenumfang einer Mittelwalze und dem Innenumfang des geschlossenen Mahlgehaeuses umlaufenden Zwischenwalzen
DE2132914A1 (de) * 1971-07-02 1973-01-18 Krupp Gmbh Muehle mit umlaufenden mahlwalzen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE524601C (de) * 1928-12-15 1932-06-24 Paul R V Knuepffer Walzenmuehle zum Zerkleinern von Stoffen aller Art

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022104455A1 (en) * 2020-11-17 2022-05-27 11559010 Canada Inc. Systems for providing centrifugal machines with grinding functionality
US11786909B2 (en) 2020-11-17 2023-10-17 11559010 Canada Inc. Systems for providing centrifugal machines with grinding functionality

Also Published As

Publication number Publication date
EP0233978A1 (de) 1987-09-02
DE3541279C2 (enrdf_load_stackoverflow) 1987-11-12
DE3541279A1 (de) 1987-05-27
ATE50159T1 (de) 1990-02-15
DE3668795D1 (de) 1990-03-15

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