EP0904153B1 - Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede - Google Patents

Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede Download PDF

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Publication number
EP0904153B1
EP0904153B1 EP97918238A EP97918238A EP0904153B1 EP 0904153 B1 EP0904153 B1 EP 0904153B1 EP 97918238 A EP97918238 A EP 97918238A EP 97918238 A EP97918238 A EP 97918238A EP 0904153 B1 EP0904153 B1 EP 0904153B1
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EP
European Patent Office
Prior art keywords
materials
track
crusher according
drum
crushing
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
EP97918238A
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German (de)
English (en)
French (fr)
Other versions
EP0904153A1 (fr
Inventor
Renaud Evrard
Alain Cordonnier
Bernard Gaucherand
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.)
FCB Ciment
Original Assignee
F C B
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Publication date
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Publication of EP0904153A1 publication Critical patent/EP0904153A1/fr
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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
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • 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
    • B02C15/06—Mills with rollers forced against the interior of a rotary ring, e.g. under spring action

Definitions

  • the present invention relates to wet grinding and shredders comprising at least one roller or roller rolling on a track circular and pressed elastically thereon.
  • mill vertical or ring mill in which a multigranular layer of material to be ground is compressed between the roller or the track roller with enough pressure to crush the grains and cause them to break up in smaller grains, are not suitable for wet grinding because a excessively high water content of the materials to be ground reduces their efficiency.
  • the materials to be ground generally have a water content of 10% to 60% by weight, with an average of 30%, which is incompatible with a good grinding yield.
  • the object of the present invention is to allow the use rational mills of this type for wet grinding.
  • the draining and spinning operations are carried out at the interior of the grinding apparatus, which is arranged for this purpose, which allows significantly reduce the cost of installation by avoiding the use of devices aids and means of transport between the different devices.
  • a grinder will be used having a circular track, fictitiously divided into several tracks elementary, or several circular tracks spaced from each other, where successive grinding operations will be carried out, means for transfer materials from one track or track element to the next, means to spray water or other liquid on the materials during their transfer from one track or track element to the next, and means capable of drain and / or spin the materials before their next passage under the roller or roller.
  • a horizontal axis ring mill tracks will be arranged side by side.
  • Adding water or another liquid to the materials after each grinding operation allows, on the one hand, to improve the flow of materials and their distribution in a layer of uniform thickness on the track and, on the other hand, to eliminate fine particles immediately after their production which makes subsequent grinding operations more efficient.
  • Water or any other liquid can be sprayed onto the materials when they are still on the track, for example by means of pressurized nozzles which then constitute a means for transferring materials from one track or track element to the next.
  • pressurized nozzles which then constitute a means for transferring materials from one track or track element to the next.
  • Spinning can be done by action of the centrifugal force in the part of the track located upstream of the grinding roller or roller.
  • a precompression roller or roller may be provided on the track, immediately at the front of the grinding roller or roller, to ensure additional spinning by pressure.
  • the mill is of the ring type rotary and the material feed device has one or more deflector plates arranged in such a way as to intercept the detached materials from the runway fitted inside the ring and oriented so as to deflect them in a direction having a parallel component to the axis of the ring; additional means for spraying water may be provided above deflector plate (s) to facilitate the flow of materials.
  • the deflector plate (s) may be porous and water or another liquid may be injected through the plate to create a liquid film facilitating the flow of materials.
  • the or the deflector plates may have a screening upper surface and means to collect and discharge water and fine crushed products crossing this surface; they then constitute a means of draining coarse material.
  • each plate can be flat or curves and each plate will be orientable around a vertical axis and possibly tiltable around a horizontal axis so as to be able to adjust the speed of advance of the materials to be ground and choose the point where the materials deflected by the plate fall on the track.
  • the wringing of material is carried out, under the action of centrifugal force, in the area of the track located between the point where the materials deflected by the deflector plate (s) fall on the track and the roller or roller.
  • this zone will have an angular extent of at least 30 °.
  • the materials retained by these edges form, at least at the level of the grinding zone, an embankment which prevents materials compressed between the roller or the roller and the track to be expelled laterally by the pressure while allowing the evacuation of the water partly through said embankment, if the area supply, respectively discharge, is provided with drainage means, and in part by overflow above the slope.
  • a rotary screen with a horizontal axis, can be placed at the outlet of the mill to sort crushed products. Refusals from the rotary screen may be brought back to the track or to the entrance of the crusher by an internal recycling device comprising a duct arranged inside from the crusher, transversely to the track, means for feeding said conduit with the rejects screen and possibly means to facilitate the flow of refusals in the conduit.
  • the screen may be integral with the body of the crusher or supported and driven by means individual. Water injection means may be provided in the rotary screen to facilitate the evacuation of the crushed products and possibly reconstitute with them a pulp having the composition suitable for further processing.
  • the mill has two axially spaced tracks each other inside a drum with a horizontal axis, two rollers or rollers suitable for each roll on a track, means for bringing the materials to be ground into the drum, between the two tracks, and means for discharging the ground material at the two ends of the drum.
  • the mill has several axially spaced tracks each other inside a drum with a horizontal axis, several rollers or rollers capable to roll each on a track, means for introducing the materials to be ground into the drum at one of its ends, means for transferring the materials from one track to the next and means for discharging the ground material at the other end of the drum, drainage means for the evacuation of water being provided between the tracks.
  • the crusher shown in Figures 1 and 2 is a grinder of the ring type consisting by a drum 2 with a horizontal axis supported by one or more pairs of pads 6 allowing its rotation around its axis.
  • the drum is rotated in the direction of the arrow R by conventional means not shown. It is constituted by a ferrule whose part middle is coated on the inside with wear plates and forms a ring carrying the track grinding.
  • a roller 4 is placed inside the shell so as to roll on track 18 when the drum is rotated.
  • the roller is integral with a shaft parallel to the axis of the drum and whose ends, which are outside the drum, are mounted in bearings capable of moving in slides or supported by pivoting arms; springs or jacks act on the bearings so as to press the roller on the track with force predetermined and adjustable.
  • This assembly is conventional and the shaft and bearings have not been represented on the drawings so as not to obscure them.
  • the roller can be free or driven in rotation by a gear motor.
  • the surface of the track and the peripheral surface of the roller are cylindrical but they could be tapered or cylindrical-conical, or formed of several parts having different diameters, as described, for example, in patent No. 91 09788 in the name of the applicant.
  • the materials to be ground are introduced into the drum through a chute 20 arranged at one end of the drum; at the other end, where the crushed material is discharged, the shell is extended by a cylindrical screen 14 which is surrounded by a collector 15. Des nozzles 24 placed inside the screen 14 are used to water the crushed materials to improve the screening and possibly produce a pulp of suitable composition for a further processing.
  • This chute is fed at one of its ends, for example by a scraper device the inner surface of the screen; water injection means may be provided for facilitate the flow of refusals in the chute.
  • the crusher is equipped with a step-by-step feed device consisting of water injection nozzles 12 and a screen 8.
  • the nozzles 12, mounted on a supply pipe not shown, are arranged so that their jets are directed towards the surface of the runway to detach the layer subjects.
  • the action of the nozzles could possibly be assisted by a scraper, parallel to the center line of the drum and disposed near the surface of the track, as described in the patent n ° 91.09788 in the name of the applicant; preferably the scraper edge will not be in contact with the runway surface, but at a short distance from it, to reduce wear.
  • the screen 8 consists of a flat or curved grid and a collecting tank. It is mounted on a support 26 so as to be able to pivot about a vertical or inclined axis 28 thanks to a connecting rod-jack system not shown. It can optionally be mounted so that be able to pivot around a horizontal axis so that it is possible to modify its inclination.
  • a chute 17 allows water and fine comminuted materials to be brought into the screen 14 collected in the screen collector 8.
  • Means may be provided to communicate screen oscillations or vibrations 8.
  • the interior of the mill can be divided into five zones well defined: a grinding zone BC, a lifting zone CD, a scraping zone DE, a advance and draining zone EF and a spinning zone FB.
  • the interior of the mill can be divided into three zones: a supply zone 30, a grinding zone 31 and a discharge zone 32.
  • the coating inside the feeding and / or evacuation areas can be designed to allow evacuation of water by drainage.
  • the materials to be ground are introduced through the chute 20 into the feeding zone 30 of the drum and a layer of materials is formed in this zone the progression parallel to the axis is controlled by the advance device.
  • a ledge 21 of the drum 2 whose internal diameter is substantially equal to that of the layer of materials being on the track constitutes a dam allowing the formation of this layer.
  • the drum rotation speed is higher than the critical speed, so that the layer material is retained on the wall of the drum by centrifugal force, throughout its periphery. Part of the water contained in the materials is eventually discharged into this area by drainage.
  • the orientation and tilt of the screen are such that the downward movement of the materials on the screen is accompanied by a displacement parallel to the axis of the drum and the length is equal to a fraction of the width of the track. Adjusting the orientation of the screen controls the feed of materials to force them to undergo several grinding cycles before being removed from the crusher.
  • the action of the screen as part of the advance device step-by-step is similar to that of the deflector plates in the grinder covered by the patent 91 09788 cited above.
  • Drained materials fall from the screen on the track where they reconstitute a layer which is wrung, under the action of centrifugal force, in the zone FB, between their point of fall and the BC grinding zone.
  • the angular extent of the FB area must be at least 30 °; the relative positions of the roller 4 and the screen 8 will be chosen to meet this condition.
  • Centrifugal force also produces a classification in the spin zone particle size distribution of solid particles which improves the work of the mill.
  • the materials enter the grinding zone to start a new cycle.
  • the materials thus pass several times between the roller and the track before reaching the edge of the runway adjacent to evacuation zone 32, the number of cycles of grinding being equal to the ratio of the advance per revolution, or not, to the width of the track.
  • each fraction of the track of width equal to one step constitutes a track fictional elementary.
  • the drum On the outlet side, the drum is provided with a rim 23 whose internal diameter is approximately equal to that of the material layer.
  • This rim allows training, in the evacuation zone 32, a slope of materials which prevents an excessive amount of materials is entrained by water when the fluidity of the layer of materials found on the track is too high, and which opposes the expulsion of materials under the action of pressure roller in the grinding area.
  • Edges 21 and 23 can be designed so that that their internal diameter can be modified to adapt it to the nature and / or the behavior of the ground materials; they could, for example, be formed of rings or exchangeable segments.
  • a precompression roller 5 can be placed on the track just before the grinding zone to complete the spinning of the material layer and prevent the water pumped out by spinning above the layer of materials from reaching the grinding roller.
  • Known means will be used to regulate the pressure exerted by the roller 5 on the material layer.
  • Arrangements can be made to facilitate the evacuation of water in the area grinding: grooving of the roller, arrangement of drainage means under the plates track shielding, etc.
  • the screen 14 could be supported and driven by independently. It could, for example, rotate at a speed lower than the speed critical and be equipped with lifters or scoops to feed the recycling chute 16 with refusals.
  • the mill could have several tracks spaced axially from each other along the drum, drainage and / or wringing means being provided between the tracks.
  • the mill shown in Figure 4 has two tracks 18 'and 18 "arranged on the side and on the other side of the median plane of the drum and axially spaced from each other, and two rollers 4 ' and 4 "each driving on a track.
  • the material to be ground is brought by a chute or any other means feed not shown in the space between the two tracks where they form, under the action of centrifugal force, a layer which is brought on both tracks by devices in advance.
  • Each track is equipped with a step-by-step advance device, for example of the same type than that of the crusher of Figures 1 and 2, which ensures the movement of materials from the medium to each end of the drum.
  • a step-by-step advance device for example of the same type than that of the crusher of Figures 1 and 2, which ensures the movement of materials from the medium to each end of the drum.
  • the drum shell is extended at each end by a screen cylindrical 14 ', 14 "equipped with water injection nozzles 24', 24".
  • 15 ', 15 collectors collect water and fine grains having passed through the screens and two recycling devices 16 ', 16 "allow the rejection of the screens to be returned to the middle area of the drum.
  • each half of the shredder in Figure 4 works like the shredder in Figures 1 and 2.
  • this construction makes it possible to halve the width of the track which facilitates the evacuation of water in the spin zone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
EP97918238A 1996-04-23 1997-04-15 Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede Expired - Lifetime EP0904153B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9605074 1996-04-23
FR9605074A FR2747598B1 (fr) 1996-04-23 1996-04-23 Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede
PCT/FR1997/000681 WO1997039829A1 (fr) 1996-04-23 1997-04-15 Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0904153A1 EP0904153A1 (fr) 1999-03-31
EP0904153B1 true EP0904153B1 (fr) 2001-07-11

Family

ID=9491481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918238A Expired - Lifetime EP0904153B1 (fr) 1996-04-23 1997-04-15 Procede de broyage en voie humide et broyeur pour la mise en oeuvre de ce procede

Country Status (14)

Country Link
US (1) US6179233B1 (ru)
EP (1) EP0904153B1 (ru)
AU (1) AU728448B2 (ru)
BR (1) BR9708808A (ru)
CA (1) CA2251006C (ru)
DE (1) DE69705615T2 (ru)
DK (1) DK0904153T3 (ru)
FR (1) FR2747598B1 (ru)
ID (1) ID16617A (ru)
MA (1) MA24149A1 (ru)
NO (1) NO984930L (ru)
RU (1) RU2176551C2 (ru)
WO (1) WO1997039829A1 (ru)
ZA (1) ZA973443B (ru)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU693372B2 (en) * 1995-07-04 1998-06-25 F.L. Smidth & Co A/S Ring roller mill
RU2528260C2 (ru) 2009-11-25 2014-09-10 Солиос Карбон Способ и машина для получения массы, в частности, углеродной массы с целью изготовления электродов для производства алюминия
FR2983418B1 (fr) * 2011-12-02 2013-11-22 Fives Fcb Broyeur par compression de lit de matieres
RU2497594C1 (ru) * 2012-06-08 2013-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Горизонтальная валковая мельница
JP6508600B2 (ja) * 2013-07-22 2019-05-08 アイエムピー テクノロジーズ ピーティーワイ エルティーディー 調節可能な超微破砕機
CN103521775B (zh) * 2013-10-08 2016-04-13 镇江宝纳电磁新材料有限公司 鳞片状金属粉末带肋的碾压装置
FR3026967B1 (fr) * 2014-10-10 2016-10-28 Fives Fcb Broyeur par compression de lit de matieres
US11097282B2 (en) * 2018-06-22 2021-08-24 1167586 B.C. Ltd. Apparatus, method and system for wet or dry processing of plant material
CA3111106A1 (en) * 2018-08-28 2020-03-05 Canada Mining Innovation Council Mono roller grinding mill

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603639A (en) * 1921-12-01 1926-10-19 James G Berryhill Pulverizing apparatus
US1577376A (en) * 1925-11-21 1926-03-16 Silva Frank Mill
FR1444397A (fr) * 1965-07-15 1966-07-01 Broyeur et procédé de broyage
SE421752B (sv) * 1978-05-02 1982-02-01 Broman John S Forfarande och kvarn for klasserande-separerande vatmalning av bergarter o dylikt
GB2118457B (en) * 1982-04-13 1985-05-22 Smidth & Co As F L Edge runner mills
JPH074543B2 (ja) * 1990-01-12 1995-01-25 宇部興産株式会社 竪型粉砕機
FR2679792B1 (fr) * 1991-08-01 1995-08-25 Fcb Perfectionnements aux broyeurs a anneaux.
DK0486371T4 (da) * 1990-11-12 2001-11-05 Fcb Mølle til finmaling af materialer
DE69522482T2 (de) * 1994-03-16 2002-01-10 Du Pont Verfahren und vorrichtung zur herstellung gleichmässig abwechselnden kablierten zwirns und produkt

Also Published As

Publication number Publication date
US6179233B1 (en) 2001-01-30
CA2251006C (fr) 2003-07-01
BR9708808A (pt) 1999-08-03
FR2747598A1 (fr) 1997-10-24
FR2747598B1 (fr) 1998-06-19
AU2643897A (en) 1997-11-12
CA2251006A1 (fr) 1997-10-30
RU2176551C2 (ru) 2001-12-10
WO1997039829A1 (fr) 1997-10-30
NO984930D0 (no) 1998-10-22
DE69705615T2 (de) 2002-05-16
NO984930L (no) 1998-12-17
MA24149A1 (fr) 1997-12-31
DE69705615D1 (de) 2001-08-16
ID16617A (id) 1997-10-23
DK0904153T3 (da) 2001-10-22
AU728448B2 (en) 2001-01-11
ZA973443B (en) 1997-10-24
EP0904153A1 (fr) 1999-03-31

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