EP0658377A1 - Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze - Google Patents

Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze Download PDF

Info

Publication number
EP0658377A1
EP0658377A1 EP93403038A EP93403038A EP0658377A1 EP 0658377 A1 EP0658377 A1 EP 0658377A1 EP 93403038 A EP93403038 A EP 93403038A EP 93403038 A EP93403038 A EP 93403038A EP 0658377 A1 EP0658377 A1 EP 0658377A1
Authority
EP
European Patent Office
Prior art keywords
cylinders
thrust
subjected
over time
pressure
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
EP93403038A
Other languages
English (en)
French (fr)
Other versions
EP0658377B1 (de
Inventor
Jean-Marc Maréchal
Michel Torneri
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.)
BROYEURS POITTEMILL SA
Original Assignee
BROYEURS POITTEMILL SA
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 BROYEURS POITTEMILL SA filed Critical BROYEURS POITTEMILL SA
Priority to EP93403038A priority Critical patent/EP0658377B1/de
Priority to DE69328252T priority patent/DE69328252D1/de
Priority to AT93403038T priority patent/ATE191158T1/de
Publication of EP0658377A1 publication Critical patent/EP0658377A1/de
Application granted granted Critical
Publication of EP0658377B1 publication Critical patent/EP0658377B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members

Definitions

  • the present invention relates to a method and a device for grinding raw materials, such as ores, with a view to reducing these materials to an appropriate particle size level, in particular with a view to obtaining fines which can be used in the stages of further processing.
  • the invention applies more particularly to a method and a device using two parallel twin cylinders and rotating in opposite directions to one another.
  • the material is continuously discharged between the two cylinders and undergoes a crushing passage leading to the obtaining of a lower particle size.
  • the cylinders are subjected, during grinding, to stresses of various origins, since they depend mainly on factors specific to the ground materials. Firstly, the particle size, at the entrance to the grinding zone between the rolls, is variable over time. Secondly, the compressive strength of the various grains of the material being ground is variable over time, whether the grains are made of the same material, and a fortiori when the material is made of different materials, for example when the latter consists of a mixture intended for the manufacture of cement (clinker, limestone and gypsum).
  • the grinding device described in the patent application mentioned above comprises means capable of allowing the recoil of one of the cylinders.
  • This device is very advantageous since it allows the passage of the body stranger between the two cylinders without damaging them.
  • this faculty is limited to the displacement of the cylinder. In the presence of foreign bodies of relatively large size, this device in fact only allows to attenuate but not to annihilate the effect of the passage of said undesirable foreign body between the two cylinders.
  • the method and the device proposed according to the invention provide a solution to the problems mentioned above, and in particular makes it possible to avoid the consequences of the vibrations to which the two cylinders and the whole structure of the mill are subjected.
  • the method of grinding solid raw materials, such as ores in which said material is subjected to the compression action of two parallel compression cylinders rotating in opposite directions one of the other, and between which the material is entrained, is characterized in that the two said cylinders are mounted on movable axes parallel to each other, in that said axes are subjected to the thrust of less a pressure member and in that the thrust developed by said pressure member is controlled so as to vary over time the pressure of the two movable cylinders acting on the material.
  • the two said cylinders are each subjected to a thrust varying over time, according to different laws, such as for example sinusoidal laws.
  • the invention also relates to a device for grinding solid raw materials, such as ores, comprising two parallel compression cylinders rotating in opposite directions, and between which the material is entrained, characterized in that the two cylinders are mounted on movable axes and in that it comprises thrust means capable of subjecting the two said cylinders to a thrust varying over time.
  • the grinding device comprises a first cylinder 10 mounted on an axis 15 and a second cylinder 20 mounted on an axis 25.
  • the two cylinders 10 and 20 are parallel and have a rotational movement about their respective axis .
  • the directions of rotation of the two cylinders 10 and 20 are opposite, as indicated by the arrows in FIG. 1.
  • the means for driving the cylinders in rotation are known in themselves and are therefore not shown, for reasons of clarity.
  • the space between the two cylinders constitutes the grinding or compression zone, where high pressure prevails, where material to be ground is discharged by means of a hopper 3 arranged in the upper position relative to the cylinders and disposed at the right of the grinding area.
  • the hopper 3 is itself fed regularly and continuously by a conveyor 4 consisting of a conveyor belt.
  • the respective axes 15 and 25 of the first and second cylinders 10 and 20 are mounted on two end bearings 16 and 16 'for the first cylinder 10 and 26 and 26' for the second cylinder 20.
  • the end bearings are integral with rods bearing the respective references 17, 17 ', 27 and 27', said rods constituting a piston displaceable in their respective cylinder 18, 18 ', 28 and 28'.
  • Each of the jacks 18 and 18 ′ associated with the first cylinder 10 are supplied by a common pipe 19 from a first pressure source P1 and a second pressure P2 supplying the common pipe 19 via a distributor 31.
  • the jacks 28 and 28 ′ associated with the second cylinder 20 are supplied by a common pipe 29 connected to a pressure P1 and P2 via a distributor 30.
  • the pressures P1, P2, P'1 and P'2 are obtained by pressure generating means known in themselves and not shown.
  • the pressures P1 and P'1 are much higher than the pressures P2 and P'2.
  • the pressures P1 and P'1 correspond to a pressure exerted at the level of the cylinder 2 of the order of 500 to 800 kilograms per cm2.
  • the pressure P2 is considerably lower, even equal to atmospheric pressure.
  • the crushed material coming from the crushing zone arranged between the first and the second crushing cylinders 10 and 20, is optionally subjected to a second crushing operation by means of two rollers 40 and 41 parallel to each other. other and turning in reverse.
  • the material subjected to this second operation falls on a conveyor belt 42 for evacuation.
  • the axes 15 and 25 of the first and second cylinders 10 and 20 under the effect of the corresponding cylinders are subjected to forces such that they generate pressure at the level of the cylinders which vary over time between a value equivalent to atmospheric pressure, and maximum values of the order of 500 to 800 kilograms per cm2.
  • the variation over time of the pressures thus communicated to the cylinders 10 and 20 is produced by means of the distributors 30 and 31, constituted by register valves as shown in FIGS. 2a and 2b showing the register valve or distributor 30, being understood that the register valve or distributor 31 is similar to that shown in FIG. 2.
  • the sliding register 50 is capable of placing the common pipe 29, depending on its position, with the pressure P1 or the pressure P2.
  • the laws of variation over time of the first and second cylinders 10 and 20 can be the same. In a variant, the laws of variation in time respectively for the first and the second cylinder are different. Similarly, the pressures P1 and P'1 can be either equal or different, it is the same for the pressures P2 and P'2. It being understood that the pressures bearing index 2 are much higher than the pressures bearing index 1.
  • the pressure variations applied to the cylinders 10 and 20 respectively are preferably cyclic, according to a regular cycle or not. According to a preferred embodiment, the pressure variations are determined so that the pressure pulse applied to the two cylinders 10 and 20 counterbalances the forces due to the vibrations to which the two cylinders 10 and 20 are subjected.
  • the device according to the invention comprises means capable of measuring these vibrations, in the form of force, force, pressure or frequency, such that these vibrations are applied to the cylinders 10 and 20.
  • the data from these measurement means (not shown and known in themselves) supply, via a line 56 (see FIG. 1), control means 57 capable of acting, via control lines 58 and 59 respectively on distributors / registers 31 and 30 respectively.
  • the information relating to the vibrations and injected by the line 56 into the control means 57 makes it possible to control the movement of the sliding registers of the respective distributors 30 and 31, in order to place in communication the common hydraulic lines 19 and respectively 29, respectively with the pressures either P1 or P'1, either P2 or P'2.
  • the device advantageously comprises a feedback loop system, by means of the vibration measurement means and the control means 57, capable of subjecting the cylinders 10 and 20 to a pressure pulse such that it cancels at least partially vibrations.
  • the thrust can be equal on the two bearings of each cylinder, so that it is the frame-cylinder assembly (cylinder 10 or cylinder 20) which exerts a linear thrust in the grinding zone.
  • pulse frequency applied to the cylinders 10 and 20 is also advantageously a function of the material to be treated.
  • the pulses imparted to the bearings 26 and 26 ′ of the second cylinder 20 respectively are asynchronous. It is thus possible to obtain, by an appropriate phase shift, between the pulsation cycles printed on each of the pistons 27 and 27 ′, an effect of displacement of the point of maximum pressure along the generatrices of the cylinders 10 and 20 opposite.
  • any misalignment between the bearings of the same cylinder can be made up by the double action of the jacks on each cylinder.
  • the vibration absorption phenomenon is increased by the uncoupling of the two cylinders from the structure, because the two cylinders are mounted on movable axes.
  • the device is provided with means for detecting foreign bodies placed in the material, and not being liable to be compressed or crushed. Once the presence of such bodies has been detected, the supply lines 19 and 29 are placed in communication with the minimum pressure P1 or P'1, thus causing the separation of the two cylinders 10 and 20, thereby achieving an enlarged passage. for the said foreign body (s). This avoids any damage to the cylinders by said foreign bodies.
  • FIG. 3 A schematic diagram of a grinding circuit with roller mills, according to the invention, for the manufacture of cement, is shown in FIG. 3.
  • a final grinding is carried out in a ball mill 32, at the outlet of which the material is separated, for example in the separator 33.
  • the desired fines are removed at 34 , while the higher particle size passers are recycled upstream of the supply to the pulsed pressure cylinder mill as described above.
  • the intermediate particles are recycled through line 36 to the ball mill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
EP93403038A 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze Expired - Lifetime EP0658377B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP93403038A EP0658377B1 (de) 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze
DE69328252T DE69328252D1 (de) 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze
AT93403038T ATE191158T1 (de) 1993-12-15 1993-12-15 Verfahren und vorrichtung zur zerkleinerung von feststoffen, wie erze

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93403038A EP0658377B1 (de) 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze

Publications (2)

Publication Number Publication Date
EP0658377A1 true EP0658377A1 (de) 1995-06-21
EP0658377B1 EP0658377B1 (de) 2000-03-29

Family

ID=8214777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93403038A Expired - Lifetime EP0658377B1 (de) 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze

Country Status (3)

Country Link
EP (1) EP0658377B1 (de)
AT (1) ATE191158T1 (de)
DE (1) DE69328252D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103492079A (zh) * 2011-04-26 2014-01-01 Khd洪保德韦达克有限公司 用于调节辊压机的辊缝压力的方法
CN105618183A (zh) * 2014-11-21 2016-06-01 重庆七彩虹化工有限公司 粉末涂料横波型压片破碎机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR328710A (fr) * 1903-01-22 1903-07-18 Jules Richard Nouveau mode de réglage des cylindres broyeurs ou lamineurs
EP0320853A2 (de) * 1987-12-18 1989-06-21 Krupp Polysius Ag Gutbett-Walzenmühle
FR2660579A1 (fr) * 1990-04-06 1991-10-11 Marechal Jean Marc Procede de broyage de matieres premieres solides, tels que des minerais.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR328710A (fr) * 1903-01-22 1903-07-18 Jules Richard Nouveau mode de réglage des cylindres broyeurs ou lamineurs
EP0320853A2 (de) * 1987-12-18 1989-06-21 Krupp Polysius Ag Gutbett-Walzenmühle
FR2660579A1 (fr) * 1990-04-06 1991-10-11 Marechal Jean Marc Procede de broyage de matieres premieres solides, tels que des minerais.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103492079A (zh) * 2011-04-26 2014-01-01 Khd洪保德韦达克有限公司 用于调节辊压机的辊缝压力的方法
CN103492079B (zh) * 2011-04-26 2016-01-06 Khd洪保德韦达克有限公司 用于调节辊压机的辊缝压力的方法
CN105618183A (zh) * 2014-11-21 2016-06-01 重庆七彩虹化工有限公司 粉末涂料横波型压片破碎机
CN105618183B (zh) * 2014-11-21 2020-06-02 抚州中和科技有限公司 粉末涂料横波型压片破碎机

Also Published As

Publication number Publication date
EP0658377B1 (de) 2000-03-29
ATE191158T1 (de) 2000-04-15
DE69328252D1 (de) 2000-05-04

Similar Documents

Publication Publication Date Title
CA2631670C (fr) Dispositif presseur pour moteur a rapport volumetrique variable
CH650820A5 (fr) Dispositif pour l'ajustement continu de l'amplitude de vibrations d'un element excentrique.
EP3585518A1 (de) Kegelzerkleinerungsmaschine und zerkleinerungsverfahren mit verwendung solch einer maschine
EP0658377B1 (de) Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze
CA1307163C (fr) Machine rotative a pistons et a barillet avec rotule de centrage fixe
FR2692171A1 (fr) Perfectionnements aux procédés et dispositifs de broyage de matières solides, tels que des minerais.
EP2550462B1 (de) Hydrodynamisches lager zur stützung eines durch rotation um die eigene achse angetriebenen zylinders
CA1268062A (fr) Cylindre a frette tournante
FR2989615A1 (fr) Ensemble pour usiner au moins un bloc de beton a coller et poste de rectification comprenant un tel ensemble
EP2827008A1 (de) Vorrichtung zum Spannen von Muttern
CA2855958A1 (fr) Broyeur par compression de lit de matieres
EP0308350B1 (de) Feinzerkleinerungsverfahren für Mineralien und Zerkleinerer zur Durchführung des Verfahrens
FR2683462A1 (fr) Dispositif de securite pour concasseur a machoire.
FR2660579A1 (fr) Procede de broyage de matieres premieres solides, tels que des minerais.
EP3031601B1 (de) Verfahren zum ausformen eines bauelements aus einer vibrationspresse
CN104847789B (zh) 一种球轴承刚度控制装置及减小球轴承转子跨临界转速振幅的方法
EP0348262B1 (de) Verfahren zur Feinzerkleinerung von Mahlgut und verbesserte Walzenmühle zur Durchführung dieses Verfahrens
FR2714307A1 (fr) Mode de broyage et broyeur à meules à broyage humide.
FR3049233B1 (fr) Systeme de suspension hydraulique d'un vehicule
US317167A (en) Roller-roughing machine
FR3049229B1 (fr) Systeme de suspension hydraulique d'un vehicule
JP3902287B2 (ja) 棒材切断機の騒音発生防止方法及びその装置
Nelson et al. Rotary extrusion devices
BE555099A (de)
FR2662266A1 (fr) Vibrateur pour produire une energie sismique.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB IT LI NL PT SE

17P Request for examination filed

Effective date: 19960219

17Q First examination report despatched

Effective date: 19980324

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB IT LI NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20000329

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000329

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20000329

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000329

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20000329

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000329

REF Corresponds to:

Ref document number: 191158

Country of ref document: AT

Date of ref document: 20000415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69328252

Country of ref document: DE

Date of ref document: 20000504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000630

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20000329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. BROYEURS POITTEMILL

Effective date: 20001231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL