US3680799A - Linings for rotary mills - Google Patents

Linings for rotary mills Download PDF

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Publication number
US3680799A
US3680799A US75125A US3680799DA US3680799A US 3680799 A US3680799 A US 3680799A US 75125 A US75125 A US 75125A US 3680799D A US3680799D A US 3680799DA US 3680799 A US3680799 A US 3680799A
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US
United States
Prior art keywords
elements
lining
lifter
star
driver
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
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US75125A
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English (en)
Inventor
Stig Lennart Hallerback
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.)
Trelleborgs Gummifabriks AB
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Trelleborgs Gummifabriks AB
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Application filed by Trelleborgs Gummifabriks AB filed Critical Trelleborgs Gummifabriks AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/22—Lining for containers
    • B02C17/225—Lining for containers using rubber or elastomeric material

Definitions

  • elements of the lining may have inner cooling passages constituted by tubes.
  • the tubes may serve as rotational axes and supporting elements for the elements I of the lining.
  • One object of this invention is to provide a lining for mills, in which worn-out elements can be rapidly exchanged by extremely simple measures. Another object of this invention is to provide an efficient cooling system for the lining elements.
  • a lining for a rotary mill barrel comprising lining elements made from a wear resistant material and mounted soas to protect the inner side of themill barrel, lifter and driver'elements made from a wear resistant material and constituting some of said lining elements, said lifter and driver elements projecting from the remaining elements, wearing portions on said lifter and driver elements, said lifter and driver elements having a substantially star-shaped cross section the points of which constitute said wearing portions, mounting means for said lifter and driver elements permitting renewal of the wearing portion of said lifter and driver elements by simple rotation of said elements.
  • the lifter and driver elements are formed substantially according to two dif ferent types, one type serving primarily as a protection for the sheet metal mantle of the mill while'the other type, apart from its mantle protective function, also serves as a driver and lifter for the charge of the mill, and at least one of the elements of the lining is formed with a star-shaped cross. section having substantially uniform points, and said lining element which preferably is a driver and lifter element is so adjustable by rotation that only one of the projecting points of the star-shaped section is subjected to wear, whereby the wearing portion of the star-shaped lining section element is easily renewable by simple rotation of the respective element.
  • FIG. '1 is a perspective view and cross section of a ball mill
  • FIGS. 2-6 are sections of alternately formed mantle segments for said mill
  • FIG. 7 is a perspective view illustrating various possibilities of arranging cooling systems in the mill.
  • FIG. 1 shows a mill consisting of a cylindrical mantle 1 with end walls 2 and 3, respectively.
  • the material 4 to be crushed or ground is supplied to the mill through a connecting socket or inlet 5 and is carried away from the mill through a discharge socket or outlet 6.
  • the cylindrical mantle surface 1 of the mill in the outermost layer thereof consists of a supporting steel structure 8.
  • To protect the outer steel mantle from wear the latter is coated internally with two different types of lining panels 9, 10 made from some type of wear resistant material, such as rubber.
  • One type of lining panels or elements 9 has the main purpose of protecting the steel structure while the other type of lining elements 10, apart from their protective function also constitutes drivers and lifters for the material to be ground or crushed.
  • the'lifter element 10 has been given a star-shaped cross section, in the present instance with three points, so that it is possible to introduce a new lifter into the mill proper by rotating the element through one division. In that way,
  • FIGS. 2-6 show more in detail how the lining elements proper may be arranged.
  • the. lifter element 10 has been formed with a central hole or tube 11 which is fixedly or movably centered in bothend walls 2 and 3.
  • Liquid coolant or cooling air can be supplied through the tubes, whereby the operatingv temperature of the wearing elements is considerably lowered, which makes for an appreciably increased life of said elements.
  • the wearing elements 9 also can be provided with cooling passages according to the above system, see in FIG. 3. The lowered temperature and the improved degree of exploiting the lining elements gives the mill in total a very good operating economy.
  • FIG. 2 shows a cross section through part of the outer barrel of the mill.
  • the lifter elements 12 are in the form of regular stars havingv three points 13, 14 and 15.
  • the lifter element 12 will become accessible when the door 16 of the outer sheet metal mantle l is opened. If at an inspection of the driving and lifting portion 13 of the lifter element the said portion shows a wear such as that marked by the dotted line 17 the driving and lifting effect of the element 12 is so low that the driving and lifting portion must be exchanged. To do this, the element is withdrawn, rotated through counterclockwise and then reintroduced into the gap between the two wearing elements 9, the function of the lifter element being again as good as if an entirely new unit had been inserted.
  • the lining elements 9 between the lifter elements 12 are made in the form of panels in FIG. 2 and have an embedded fastening metal sheet 20 which can be secured by bolts in a known manner against the barrel 1.
  • the lining elements 9 'must be made so thick in their wear resistant portion that their life on the whole corresponds to the time it takes to wear down all three drivers and lifters 13, 14 and 15 of the element 12.
  • FIG. 3 mainly shows the same type of lining element as FIG. 2, with the difference, however, that the lining elements 9 have two longitudinal tubes 21 which are connected to the end walls of the mill on the same principle as the tube for the rotatable lifter elements 12.
  • the entire lining of the mill can be given a much lower operating temperature than what is the case in conventional mill linings.
  • FIG. 4 shows a special combination of rotatable driver and lifter elements 12 and lining elements 9.
  • the driving and lifting portion 13 of the elements 12 in this embodiment to a certain extent constitute part of the lining element 9 since the latter has been designed with an inclined supporting portion 14 which braces the rear side of the driving and lifting portion 13.
  • the driving and lifting portion 13 will have a greater stability andsupporting ability. Should it prove at an inspection that the wear of the driving and lifting portion 13 is so large as illustrated by way of example by the dotted line 22 the lifter element is rotated whereby a practically new lining is obtained.
  • By building a mill lining in this way use can be made of a very good rubber quality for the heavily stressed and worn lifter elements, whereas the intermediary lining elements 9 may be made in a cheaper and economically more advantageous quality.
  • self-setting or self-adjusting mantle elements 23 can be mounted between the lifter elements 12. These self-setting or self-adjusting elements in their upper parts have a longitudinal tube 24, about which the element 23 is movable. This arrangement may be of advantage in the total mounting of the lining elements and provides simple and efficient cooling properties on the same principle as for the rotatable lifter element.
  • FIG. 6 shows a number of lifter elements 12. Provided between these lifter elements are similar rotatable mantle elements 25 which can thus also be renewed three times according to the degree of wear.
  • FIG. 7 very diagrammatically shows how the cooling systems through the lining elements can be caused to function.
  • 26 there is shown quite simply how the central tubes or holes freely open on the outer side 27 of the mill end wall.
  • air under pressure or cooling water 28 may be injected when the tube mouths go past a fixed nozzle 29.
  • a type of self-circulation for water may be arranged, for example as shown at 30 with a number of inlet nozzles directed in opposition to the direction of rotation of the barrel. If said inlet nozzles are extended as shown at 31 they will be able to collect so much water when passing a water reservoir 32 that a suitable speed of the flow of cooling water may be obtained through the central tubes.
  • More developed cooling arrangements may certainly be provided, but the systems shown and described are merely meant to aim at indicating the basic principle of the cooling function.
  • a lining for a rotary mill barrel comprising lining elements made from a wear resistant material and mounted so as to protect the inner side of the mill barrel, lifter and driver elements made from a wear resistant material and constituting some of said lining elements, said lifter and driver elements projecting from the remaining lining elements, wearing portions on said lifter and driver elements, said lifter and driver elements having a substantially star-shaped cross section the points of which constitute said wearing portions, mounting means for said lifter and driver elements permitting renewal of the wearing portion of said lifter and driver elements by simple rotation of said elements.
  • a lining as claimed in claim 2 wherein said central tubes are arranged to receive coolant, through injection nozzles located at the end wall portions of the mill barrel and directed towards said portions.
  • a lining for a rotary mill barrel comprising lining elements made from a wear resistant material and mounted so as to protect the inner side of the mill barrel, lifter and driver elements made from a wear resistant material and constituting some of said lining elements, said lifter and driver elements projecting from the remaining lining elements, wearing portions on said lifter and driver elements, some of said lifter and driver elements having a substantially star-shaped cross section the points of which constitute said wearing portions, mounting means for said some of said lifter and driver elements permitting renewal of the wearing portion of said some of said lifter and driver elements by simple rotation of said elements.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
US75125A 1969-09-25 1970-09-24 Linings for rotary mills Expired - Lifetime US3680799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13162/69A SE335665B (de) 1969-09-25 1969-09-25

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US3680799A true US3680799A (en) 1972-08-01

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US (1) US3680799A (de)
CA (1) CA923866A (de)
SE (1) SE335665B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889889A (en) * 1972-08-14 1975-06-17 Kobe Steel Ltd Apparatus for pulverizing vulcanized rubber and rubber products
US4141511A (en) * 1977-03-03 1979-02-27 Trelleborg Rubber Company, Inc. Mill lining elements
US4165041A (en) * 1978-02-02 1979-08-21 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4235386A (en) * 1978-08-11 1980-11-25 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4289279A (en) * 1977-02-25 1981-09-15 Trelleborg Ab Mill lining
US4295615A (en) * 1979-09-27 1981-10-20 Minneapolis Electric Steel Castings Company Shell liner assembly for ore comminuting machine
US4319719A (en) * 1979-09-27 1982-03-16 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4328077A (en) * 1979-11-07 1982-05-04 Accumold Ag Method for reforming a used tubular mold for continuous casting
US4341355A (en) * 1980-03-13 1982-07-27 The Frog, Switch & Manufacturing Company Arrangement for support of contact elements for material treating applications
US4586659A (en) * 1981-04-06 1986-05-06 Easter Ii James M Systemitized waste product separation and total utilization
US4609158A (en) * 1984-04-16 1986-09-02 Midland-Ross Corporation Composite grinding mill liner
US4940001A (en) * 1988-11-09 1990-07-10 Holley Engineering Company, Inc. Rail spike cleaning apparatus
US6021536A (en) * 1993-03-04 2000-02-08 Wasinger; Eric Mechanical desizing and abrading device
CN109622155A (zh) * 2019-01-18 2019-04-16 深圳粤通应用材料有限公司 一种银浆加工用自冷自洁式高效球磨机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470597A (en) * 1921-12-03 1923-10-16 Denny James John Rotary pulverizer
US2887276A (en) * 1957-04-24 1959-05-19 Kimberly Clark Co Shell type pulpstone
US2909335A (en) * 1953-08-10 1959-10-20 Trelleborgs Gummifabriks Ab Resilient and bonded drum lining
US3194506A (en) * 1962-03-08 1965-07-13 Ronald F Bourne Renewable elements which are subject to wear by abrasion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470597A (en) * 1921-12-03 1923-10-16 Denny James John Rotary pulverizer
US2909335A (en) * 1953-08-10 1959-10-20 Trelleborgs Gummifabriks Ab Resilient and bonded drum lining
US2887276A (en) * 1957-04-24 1959-05-19 Kimberly Clark Co Shell type pulpstone
US3194506A (en) * 1962-03-08 1965-07-13 Ronald F Bourne Renewable elements which are subject to wear by abrasion

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889889A (en) * 1972-08-14 1975-06-17 Kobe Steel Ltd Apparatus for pulverizing vulcanized rubber and rubber products
US4289279A (en) * 1977-02-25 1981-09-15 Trelleborg Ab Mill lining
US4141511A (en) * 1977-03-03 1979-02-27 Trelleborg Rubber Company, Inc. Mill lining elements
US4165041A (en) * 1978-02-02 1979-08-21 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4235386A (en) * 1978-08-11 1980-11-25 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4270705A (en) * 1978-08-11 1981-06-02 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4295615A (en) * 1979-09-27 1981-10-20 Minneapolis Electric Steel Castings Company Shell liner assembly for ore comminuting machine
US4319719A (en) * 1979-09-27 1982-03-16 Minneapolis Electric Steel Castings Company Shell liner assembly for ore grinding mills
US4328077A (en) * 1979-11-07 1982-05-04 Accumold Ag Method for reforming a used tubular mold for continuous casting
US4341355A (en) * 1980-03-13 1982-07-27 The Frog, Switch & Manufacturing Company Arrangement for support of contact elements for material treating applications
US4586659A (en) * 1981-04-06 1986-05-06 Easter Ii James M Systemitized waste product separation and total utilization
US4609158A (en) * 1984-04-16 1986-09-02 Midland-Ross Corporation Composite grinding mill liner
US4940001A (en) * 1988-11-09 1990-07-10 Holley Engineering Company, Inc. Rail spike cleaning apparatus
US6021536A (en) * 1993-03-04 2000-02-08 Wasinger; Eric Mechanical desizing and abrading device
CN109622155A (zh) * 2019-01-18 2019-04-16 深圳粤通应用材料有限公司 一种银浆加工用自冷自洁式高效球磨机

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Publication number Publication date
CA923866A (en) 1973-04-03
SE335665B (de) 1971-06-01

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