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EP0159710A2 - Procédé et dispositif pour le broyage de matériau difficilement broyable, en particulier de charbon humide ou de coke - Google Patents

Procédé et dispositif pour le broyage de matériau difficilement broyable, en particulier de charbon humide ou de coke Download PDF

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Publication number
EP0159710A2
EP0159710A2 EP85105012A EP85105012A EP0159710A2 EP 0159710 A2 EP0159710 A2 EP 0159710A2 EP 85105012 A EP85105012 A EP 85105012A EP 85105012 A EP85105012 A EP 85105012A EP 0159710 A2 EP0159710 A2 EP 0159710A2
Authority
EP
European Patent Office
Prior art keywords
grinding
tracks
rollers
track
media
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.)
Withdrawn
Application number
EP85105012A
Other languages
German (de)
English (en)
Other versions
EP0159710A3 (fr
Inventor
Günther Unger
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.)
Individual
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
Publication of EP0159710A2 publication Critical patent/EP0159710A2/fr
Publication of EP0159710A3 publication Critical patent/EP0159710A3/fr
Withdrawn legal-status Critical Current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 method for grinding difficult-to-grind material, in particular moist coal or coke between rotating grinding media and a grinding track to final fineness.
  • the object of creating a corresponding grinding process is achieved in that the grinding is carried out in a material bed on the grinding path using a high specific pressure.
  • the design of the method provides that the grinding stock of grinding media between concentric, cylindrical grinding tracks, one of which, preferably the inside, is driven in rotation, is run over several times and taken along. In this way, the pressure required for comminuting the ground material is advantageously exerted on the ground material and the ground material is transported by the entrainment effect.
  • the ground material is subjected to several grinding processes in succession on the grinding track. As a result, the regrind does not need to be crushed to the final grain size in a single operation.
  • the regrind is subjected to a large number of comminution processes by rolling it over the grinding media and by moving it in the direction of discharge under several grinding media. This achieves the advantageous combination of multiple shredding and transport processes.
  • the grinding is carried out by means of grinding media which are small in relation to the feed grain size and which are in particular of the same order of magnitude as the maximum feed grain size.
  • the size ratios lead on the one hand to a high specific crushing pressure and on the other hand to low investment costs when implementing the method within a device.
  • Drying of the ground material by indirect heating can advantageously already take place during the grinding. It is irrelevant which of the grinding tracks is heated. Depending on the application, the cheapest choice can be made here. This eliminates the need for post-drying or pre-drying of the ground material. The individual process steps in achieving the desired end product are thus advantageously reduced.
  • the grinding is carried out by a large number of grinding bodies designed as rollers, rollers, rods or the like.
  • the involvement of many grinding media in the process allows the wear of the individual grinding media to be influenced favorably, and thus increases the availability of the entire system.
  • the rotary relative movement of the concentric grinding tracks can also be replaced by an oscillating movement of mutually parallel flat grinding tracks. This allows the method to be used even with flat, plate-shaped grinding tracks.
  • the degree of fineness in the grinding can be adjusted by the length of the grinding path.
  • the degree of fineness is advantageously decoupled from the "time" parameter and added to the determinability by means of a design variable. It is no longer the residence time of the goods within the plant that is the primary determining factor for the degree of fineness, but the easy-to-grasp length of the grinding path.
  • the degree of fineness of the grinding is also advantageous, regardless of the wear on the grinding media, in that the wear on the grinding media is self-adjusting. This leads to greater homogeneity of the end product with higher availability of the entire system.
  • the material to be ground is advantageously carried out under the influence of gravity from top to bottom when the grinding tracks oscillate in opposite directions. There is therefore no need for any other transport methods to discharge the regrind from the system.
  • the device according to which the method described can be used provides that it has a multiplicity, at least two, parallel grinding tracks, between which grinding elements in the form of rollers, rods or rollers are arranged.
  • the parts of the device involved in the grinding process thus have a very simple geometric shape which facilitates the manufacture and maintenance of the mill.
  • the grinding tracks have cavities for receiving a heating medium, e.g. a heat transfer oil or for steam.
  • a heating medium e.g. a heat transfer oil or for steam.
  • the grinding media are held laterally in guide bearings to ensure parallelism.
  • the guide bearings effectively prevent the grinding media from jamming or migrating. Malfunctions are avoided. This measure represents a further contribution to increasing plant availability.
  • the guide bearings are arranged in square bearing plates which have a screw connection to lateral guide cheeks, in particular cage rings. This provides a particularly efficient way of replacing bearings. By loosening the screws, which are easily accessible on the cage rings or side cheeks, the entire bearing plate and bearing can be replaced quickly.
  • the angular design can be manufactured particularly inexpensively in terms of production technology.
  • the bearing plates consist of corrosion-resistant steel. This gives the critical machine parts, to which bearings generally belong, a particularly long service life.
  • the bearing seat is advantageously protected against corrosion.
  • the remaining machine parts can be made from less expensive materials, so that overall a very robust, reliable and nevertheless inexpensive solution of the device for grinding difficult-to-grind material results.
  • the feed openings of the device have a gap for metering, which preferably corresponds to less than or equal to the distance between two grinding rollers. This results in a dosed feeding of the ground material to the mill. Malfunctions that can occur as a result of the mill being overfilled are prevented.
  • the energy requirement of the mill is advantageously reduced in that the rollers have thrust rings that maintain a minimal distance from adjacent rollers. This prevents the direct friction between two adjacent rollers, so that sufficient space is also provided between the rollers for receiving regrind.
  • a grinding track is driven.
  • the inside is preferably driven, so that inevitably, in cooperation with the rollers and the outer fixed grinding track, a movement sequence results as in a planetary gear.
  • One of the cylindrical grinding tracks preferably the outside, has an axial gap which can be adjusted by means of a clamping device.
  • the tensioning device can, with the aid of springs, for example, very advantageously be an automatic re-tensioning of the cylinder jacket, for example to compensate for the wear of the grinding rollers.
  • the further embodiment of the device provides that one or more discharge openings are arranged on a grinding track.
  • the arrangement of the discharge opening in relation to the feed opening and the path for the ground material thereby required to pass through the mill determines the final fineness of the ground material.
  • the parallel surfaces i.e. the grinding tracks are parts of levels.
  • This embodiment of the device provides that the moving, flat grinding tracks are each connected in pairs to each other in push-pull. This advantageously enables weight compensation for the oscillating drive of the grinding track and the drive can be carried out with surprisingly low power.
  • the grinding bodies have guide cheeks on the sides, which preferably have insertion slots for the guide bearings. This arrangement allows particularly simple maintenance or replacement of defective bearings and increases the availability of the entire system.
  • the moving grinding tracks have a common drive, each of which drives an associated pair of grinding tracks, which each have symmetrically distributed uneven positions with respect to one another.
  • the combination and assignment of several driven grinding tracks to one drive advantageously smoothes out the course of the motor torque and further reduces the overall output of the drives to be provided for the mill.
  • the grinding tracks have at least one pre-breaking nose for coarse feed material on the input side. Due to its oscillating movement, this pre-breaking nose pulls the regrind into the mill and prevents oversized pieces from possibly blocking the mill.
  • the grinding tracks advantageously have a plurality of comminution edges on the feed side with a passage cross section which is preferably reduced in the direction of the grinding bodies. This allows even lumpy goods to be milled, since they are reduced to a milled grain size by means of the chopping edges in conjunction with the oscillating movement of the grinding track.
  • 1 denotes the grinding roller, which is surrounded by the grinding rollers 2 along its circumference. Both the milling drum 1 and the milling rollers 2 lie within the milling drum 3.
  • the flat bars 4, FIG. 1, which can advantageously also be replaced by rotating rods, are firmly connected to the cage rings 5 and thus form the cage 6. Depending on the geometric dimensions the machine can optionally omit the cage rings 5.
  • the flat bars 4 secure the cage against twisting. They also serve to axially guide the grinding rollers 2.
  • the grinding rollers 2 are held at a distance by the ball bearings 7, so that the grinding rollers 2 cannot rub against each other.
  • the regrind tasks 8 are arranged in the upper area and the regrind discharges 9 are arranged on the circumference of the grinding drum 3.
  • the location of the grist discharge determines the fineness of the grist. The larger the circumferential arc through which the regrind passes, the finer the regrind that is discharged.
  • the length of the milling drum 3 and the fineness of the grinding are decisive for the number of milling tasks and the arrangement of the milling material discharges 9.
  • the material to be ground is crushed between a rotatingly driven grinding roller 1, a plurality of rolling grinding rollers 2 and a stationary grinding drum 3, the movement sequence corresponding to the principle of the needle bearing.
  • the driven rotating grinding roller 1 sets the grinding rollers 2 in an opposite rotating movement, so that the grinding rollers roll on the inner surface of the standing grinding drum.
  • the grinding rollers 2 move in the same direction as the grinding roller 1, but with half Speed, ie while the milling drum 1 rotates twice around its own axis, the milling rollers 2 travel once along the full circumference of the milling drum.
  • the regrind that has entered through the regrind 8 is drawn in by the reel 3 and crushed between the reel 1, reel 2 and reel 3.
  • the degree of filling of the mill is decisive for the level of the grinding pressure.
  • the crushed regrind moves outwards through the regrind discharge.
  • the discharged regrind is advantageously collected by funnels. These funnels can be in the middle and / or at the outer ends of the cylindrical grinding track.
  • the path a grain travels during the shredding process changes depending on the location of the material outlet.
  • the most advantageous position of the regrind is therefore dependent on the desired grain size and the material to be ground.
  • Suitable grinding elements are installed within the regrind tasks 8, preferably flaps or slides 12, which make it possible to dose the regrind flow and thus determine the degree of filling of the mill.
  • the grinding drum is advantageously slotted, the slit 10 being adjustable by means of suitable tensioning elements 11, such as screws and springs. In this way, the wear of the grinding rollers can advantageously be easily compensated.
  • the gap width also influences the level of the grinding pressure.
  • Several flaps can also be arranged along the circumference of the grinding drum. Depending on which of these flaps is used as regrind, the fineness of the discharged material changes so that the degree of grinding can be determined in this way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP85105012A 1984-04-26 1985-04-25 Procédé et dispositif pour le broyage de matériau difficilement broyable, en particulier de charbon humide ou de coke Withdrawn EP0159710A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843415564 DE3415564A1 (de) 1984-04-26 1984-04-26 Verfahren und vorrichtung zur mahlung von schwermahlbarem gut, insbesondere von feuchter kohle oder koks
DE3415564 1984-04-26

Publications (2)

Publication Number Publication Date
EP0159710A2 true EP0159710A2 (fr) 1985-10-30
EP0159710A3 EP0159710A3 (fr) 1986-05-21

Family

ID=6234435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105012A Withdrawn EP0159710A3 (fr) 1984-04-26 1985-04-25 Procédé et dispositif pour le broyage de matériau difficilement broyable, en particulier de charbon humide ou de coke

Country Status (5)

Country Link
EP (1) EP0159710A3 (fr)
JP (1) JPS6133244A (fr)
AU (1) AU4163085A (fr)
DE (1) DE3415564A1 (fr)
ZA (1) ZA853128B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008025373B3 (de) * 2008-05-27 2009-09-17 Hosokawa Bepex Gmbh Vorrichtung zur Gutbettzerkleinerung
CN115283092A (zh) * 2022-09-30 2022-11-04 兴化市正阳水泥有限公司 一种水泥生产球磨机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127693C (fr) *
FR851164A (fr) * 1939-03-03 1940-01-04 Broyeur colloïdogène centrifuge à friction
DE3347117A1 (de) * 1983-12-27 1985-07-11 Günther 5628 Heiligenhaus Unger Verfahren und vorrichtung zum mahlen von schwermahlbaren guetern, insbesondere nassen koks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008025373B3 (de) * 2008-05-27 2009-09-17 Hosokawa Bepex Gmbh Vorrichtung zur Gutbettzerkleinerung
US8336798B2 (en) 2008-05-27 2012-12-25 Hosokawa Bepex Gmbh Apparatus for material-bed comminution
CN115283092A (zh) * 2022-09-30 2022-11-04 兴化市正阳水泥有限公司 一种水泥生产球磨机

Also Published As

Publication number Publication date
DE3415564A1 (de) 1985-11-07
EP0159710A3 (fr) 1986-05-21
AU4163085A (en) 1985-10-31
JPS6133244A (ja) 1986-02-17
ZA853128B (en) 1985-12-24

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