EP0161943A2 - Moulin broyeur - Google Patents

Moulin broyeur Download PDF

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Publication number
EP0161943A2
EP0161943A2 EP85303491A EP85303491A EP0161943A2 EP 0161943 A2 EP0161943 A2 EP 0161943A2 EP 85303491 A EP85303491 A EP 85303491A EP 85303491 A EP85303491 A EP 85303491A EP 0161943 A2 EP0161943 A2 EP 0161943A2
Authority
EP
European Patent Office
Prior art keywords
hump
ring
grinding
mill
support table
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
EP85303491A
Other languages
German (de)
English (en)
Other versions
EP0161943A3 (en
EP0161943B1 (fr
Inventor
John Templeton
John Welsh Taylor
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.)
Altrad Babcock Ltd
Original Assignee
Babcock Power Ltd
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 Babcock Power Ltd filed Critical Babcock Power Ltd
Priority to AT85303491T priority Critical patent/ATE32983T1/de
Publication of EP0161943A2 publication Critical patent/EP0161943A2/fr
Publication of EP0161943A3 publication Critical patent/EP0161943A3/en
Application granted granted Critical
Publication of EP0161943B1 publication Critical patent/EP0161943B1/fr
Expired 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
    • B02C15/003—Shape or construction of discs or rings
    • 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

Definitions

  • This invention relates to grinding mills.
  • a form of grinding mill that has been progressively and successfully developed in recent times includes a circle of grinding balls held between an upper and a lower grinding ring, both being concentric with the circle.
  • the upper ring is fixed and the lower ring is rotated about its axis.
  • a grinding mill comprising a circle of grinding balls held between a fixed upper grinding ring and a lower rotatable grinding ring that rests on a support table that is connected to, and rotatable from, a central support, contact between the lower grinding ring and the support table being through a hump, concentric with the circle, on the ring or the tableland a surface on the other such that variation in the angle of the part of the surface of the support table on which the ring rests results in movement, seen in a vertical axial section, of the point of contact from one point on the hump to another.
  • Figure 1 illustrates a ring of grinding balls 1 acting between a fixed upper grinding ring 2 and a lower, rotatable, grinding ring 3.
  • the ring 3 rests on a support table 4, integrally connected to means 5 by which the table can be rotated about its vertical axis.
  • the upper surface of the support table 4 is horizontal. Material to be ground is discharged through the chute 6.
  • a seal (not shown) is provided around the inner edge of the ring 3 to prevent the ingress of pulverulent material to the space between the ring 3 and the table 4.
  • the ring 3 rests flat on the support table 4 when the mill is at rest and unloaded.
  • the support table will tilt downwardly at its outer edge so that support for the lower ring 3 is provided only at the edge A of the ring and the moment acting there on the ring is dependent upon all of the distance between A and the direction of the forces acting on the ring.
  • the centrifugal forces on the balls will tend to mean that the resultant force acting downwardly on the support table acts at a small angle outwardly from the vertical.
  • the centre of the bump 10 may lie slightly outwardly of the circle that contains the centres of the balls.
  • the hump 20 is not continuously curved but, in section, provides a flat bottom 21 and two flat sides 22 and 23 that slope upwardly at a small inclination upwardly from the edges of the bottom surface 21.
  • the centre of the hump 20 is slightly displaced outwardly from the circle that contains the centres of the balls 1 to maintain, during the life of the mill, at a low optimum the moment exerted by the resultant force acting on the ring 3a.
  • An advantage of the use of a hump in the form as shown at 20 is that the lower surface 21 can be ground slightly to ensure contact between the hump and the support table 4 throughout its extent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Soft Magnetic Materials (AREA)
EP85303491A 1984-05-17 1985-05-17 Moulin broyeur Expired EP0161943B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85303491T ATE32983T1 (de) 1984-05-17 1985-05-17 Zerkleinerungsmuehle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848412543A GB8412543D0 (en) 1984-05-17 1984-05-17 Grinding mills
GB8412543 1984-05-17

Publications (3)

Publication Number Publication Date
EP0161943A2 true EP0161943A2 (fr) 1985-11-21
EP0161943A3 EP0161943A3 (en) 1986-03-05
EP0161943B1 EP0161943B1 (fr) 1988-03-16

Family

ID=10561070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85303491A Expired EP0161943B1 (fr) 1984-05-17 1985-05-17 Moulin broyeur

Country Status (4)

Country Link
EP (1) EP0161943B1 (fr)
AT (1) ATE32983T1 (fr)
DE (1) DE3561865D1 (fr)
GB (1) GB8412543D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435537A1 (fr) * 1989-12-21 1991-07-03 Babcock Energy Limited Broyeur pulvérisateur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK160463C (da) * 1977-12-13 1991-09-09 Fives Cail Babcock Knusevaerk, saasom kantmoelle med lodret aksel
GB2057915A (en) * 1979-08-16 1981-04-08 Steinmuller Africa Pty Ltd L & A ball and race pulveriser
CH654086A5 (de) * 1981-11-02 1986-01-31 Maag Zahnraeder & Maschinen Ag Schuesselmuehlengetriebe.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435537A1 (fr) * 1989-12-21 1991-07-03 Babcock Energy Limited Broyeur pulvérisateur

Also Published As

Publication number Publication date
EP0161943A3 (en) 1986-03-05
ATE32983T1 (de) 1988-04-15
GB8412543D0 (en) 1984-06-20
DE3561865D1 (en) 1988-04-21
EP0161943B1 (fr) 1988-03-16

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