EP0658377B1 - Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze - Google Patents

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

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Publication number
EP0658377B1
EP0658377B1 EP93403038A EP93403038A EP0658377B1 EP 0658377 B1 EP0658377 B1 EP 0658377B1 EP 93403038 A EP93403038 A EP 93403038A EP 93403038 A EP93403038 A EP 93403038A EP 0658377 B1 EP0658377 B1 EP 0658377B1
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EP
European Patent Office
Prior art keywords
cylinders
thrust
subjected
time
spindles
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
EP93403038A
Other languages
English (en)
French (fr)
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EP0658377A1 (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 AT93403038T priority Critical patent/ATE191158T1/de
Priority to EP93403038A priority patent/EP0658377B1/de
Priority to DE69328252T priority patent/DE69328252D1/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

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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
    • 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 a appropriate grain size level, particularly for 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 twin cylinders parallel and rotating in opposite directions to each other.
  • the material is continuously discharged between the two cylinders and undergoes a crushing passage leading to obtaining with a smaller particle size.
  • the cylinders are subjected, during grinding, to requests from various origins, since they mainly depend on material-specific factors crushed.
  • the grinding device described in the patent application mentioned above includes means suitable for allow the recoil of one of the cylinders. These measures is very advantageous since it allows the passage of the body stranger between the two cylinders without damaging these last. However, this option is limited to displacement of the cylinder. In the presence of foreign bodies of relatively large, this device only allows to mitigate but not to annihilate the effect of the passage said undesirable foreign body between the two cylinders.
  • the method and the device proposed according to the invention provide a solution to the above-mentioned problems, and in particular avoids the consequences of vibrations to which the two cylinders are subjected and the whole structure of the mill.
  • the process of grinding solid raw materials, such as ores in which subject said material to the compression action of two parallel compression cylinders rotating in opposite direction to each other, and between which matter is driven, is characterized in that the two said cylinders are mounted on parallel movable axes one to the other, in that the said axes are subjected to the thrust at least one pressure member and in that the thrust developed by said pressure member is controlled from so as to vary the pressure of the two over time movable cylinders acting on the material.
  • the two said cylinders are each subjected to a time varying thrust, according to laws different, such as for example sinusoidal laws.
  • the invention also relates to a device for grinding of solid raw materials, such as ores, comprising two compression cylinders parallels rotating in opposite directions, and between which the material is entrained, characterized in that that the two cylinders are mounted on movable axes and in that it includes pushing means capable of subject the two said cylinders to a varying thrust in 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 rotated around their respective axis.
  • the directions of rotation of the two cylinders 10 and 20 are opposite, as indicated by arrows in Figure 1.
  • the means of training in rotation of the cylinders are known in themselves and are only therefore not shown, for reasons of clarity.
  • the space between the two cylinders constitutes the area of crushing or compression, where high pressure prevails, where material to be shredded is poured through a hopper 3 arranged in the upper position relative to to the cylinders and arranged in line with the grinding zone.
  • the hopper 3 is itself fed regularly and continues 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 bearings end 16 and 16 'for the first cylinder 10 and 26 and 26 'for the second cylinder 20.
  • the bearings end are secured to rods bearing the references 17, 17 ', 27 and 27' respectively, said rods constituting a piston displaceable in their respective cylinder 18, 18 ', 28 and 28'.
  • Each of the cylinders 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 of pressure P2 supplying the common line 19 by through 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 represented.
  • pressures P1 and P'1 are largely higher than pressures P2 and P'2.
  • pressures P1 and P'1 correspond to a pressure exerted at level of 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 grinding rolls 10 and 20, is possibly subjected to a second operation grinding by means of two rollers 40 and 41 parallel to each other and rotating in opposite directions.
  • the material subjected to this second operation falls on a evacuation conveyor 42.
  • 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 as they generate at the level of cylinders of time varying pressures between a equivalent to atmospheric pressure, and maximum values of the order of 500 to 800 kilograms per cm2.
  • the variation over time of the pressures as well communicated to cylinders 10 and 20 is produced by through distributors 30 and 31, consisting of register valves as shown in the figures 2a and 2b showing the register valve or distributor 30, it being understood that the register valve or distributor 31 is similar to that shown in Figure 2.
  • the sliding register 50 is likely to place the common line 29, depending on its position, with pressure P1 or pressure P2. So, depending on the movement of the register 50, the pressure developed by each of the cylinders 28 and 28 'and therefore transferred to the second cylinder 20, varies. It is the same for the first cylinder 10.
  • the first and second time variation laws cylinders 10 and 20 can be the same. In variant, the laws of variation in time respectively for the first and the second cylinder are different. Likewise, the pressures P1 and P'1 can be either equal or different, the same is true of pressures P2 and P'2. It being understood that the pressures bearing index 2 are much higher than pressures bearing index 1.
  • the pressure variations applied to cylinders 10 and 20 respectively are preferably cyclic, according to a regular cycle or not. According to a preferred mode of realization, the pressure variations are determined so that the pressure pulse applied to both cylinders 10 and 20 counterbalance the forces due to vibrations to which the two cylinders 10 and 20.
  • the device according to the invention comprises means capable of measuring these vibrations, in the form of effort, force, pressure or frequency, such as these vibrations are applied to cylinders 10 and 20.
  • the data from these measurement means feed, via a line 56 (see FIG. 1), control means 57 likely to act, through lines of command 58 and 59 respectively on the distributors / registers 31 and 30 respectively.
  • the device advantageously includes a loop system feedback, via measuring means vibrations and the control means 57, capable of subject cylinders 10 and 20 to a pulsation of pressure such that it at least partially cancels the vibrations.
  • the thrust can be equal on the two bearings of each cylinder, so that's the frame-cylinder assembly (cylinder 10 or cylinder 20) which exerts a linear thrust in the area grinding.
  • pulse frequency applied to cylinders 10 and 20 is also advantageously a function of the material to be treated.
  • the pulses printed at the bearings 26 and 26 'of the second cylinder respectively 20 are asynchronous. It is thus possible to obtain by an appropriate phase shift, between the cycles of pulsation printed on each of the pistons 27 and 27 'a effect of moving the maximum pressure point along generators of cylinders 10 and 20 opposite.
  • any misalignment between the bearings of the same cylinder can be overtaken by the double action cylinders 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 moving axes.
  • the device is provided with means for detecting foreign bodies disposed in the material, and not being likely to be compressed or crushed. Once the presence of such bodies detected, supply lines 19 and 29 are put in communication with the minimum pressure P1 or P'1, thus causing separation of the two cylinders 10 and 20, thereby achieving a enlarged passage for said foreign body (s). This will prevent damage to the cylinders by said foreign bodies.
  • FIG. 3 A schematic diagram of a grinding circuit with grinders with cylinders, according to the invention, for the manufacture of cement, is shown in Figure 3.
  • a finishing 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 fines wanted are evacuated in 34, while passers-by larger grain sizes are recycled upstream 35 of the supply to the pulsed pressure cylinder mill as previously described. Intermediate particles are recycled through line 36 to the ball mill.

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  • 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)

Claims (12)

  1. Verfahren zum Zerkleinern von festen Rohstoffen wie etwa Erzen, bei dem die Stoffe der Kompressionswirkung von zwei parallelen, in entgegengesetzte Richtungen rotierenden Kompressionszylindern (10, 20) ausgesetzt werden und zwischen denen die Stoffe mitgenommen werden, wobei die Zylinder auf zueinander parallelen Achsen (15, 25) montiert sind, und wobei eine der Achsen beweglich montiert ist, und wenigstens eine der Achsen eingerichtet ist, dem Schub wenigstens eines Druckorgans (28, 28') ausgesetzt zu werden, dadurch gekennzeichnet, dass die zwei Zylinder auf beweglichen Achsen montiert sind, und dass die Achsen (15, 25) dem Schub wenigstens eines Druckorgans ausgesetzt werden, und dass der in dem Druckorgan entwickelte Schub so gesteuert wird (30), dass der Druck der zwei beweglichen Zylinder im Laufe der Zeit variiert wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die zwei Zylinder (10, 20) jeweils einem Schub ausgesetzt werden, der im Laufe der Zeit nach unterschiedlichen Regeln variiert.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die zwei Zylinder Schüben ausgesetzt werden, die im Laufe der Zeit zyklisch variieren.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die zwei Zylinder einem Schub ausgesetzt werden, der im Laufe der Zeit sinusförmig variiert.
  5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Änderung des Schubes im Laufe der Zeit derart ist, dass sie den Schwingungen entgegenwirkt, denen die Zylinder bei der Kompression der Stoffe ausgesetzt sind.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Schwingungen gemessen werden und eine Kompressionspulsation für jeden Zylinder mit einer solchen Frequenz und Phase erzeugt wird, dass sie den Schwingungen entgegenwirkt und/oder sie absorbiert.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Vorhandensein von Fremdkörpern innerhalb der Stoffe, die komprimiert oder zerkleinert werden konnten, erfasst wird, und dass im Falle der Erfassung eines oder mehrerer Fremdkörper wenigstens einer der Zylinder einem im Wesentlichen verschwindenden Schub ausgesetzt wird.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die zwei Zylinder einem verschwindenden Schub ausgesetzt werden, um die zwei Zylinder sich in entgegengesetzte Richtungen bewegen zu lassen und so den Fremdkörpern den Durchgang frei zu lassen.
  9. Vorrichtung zum Zerkleinern von festen Rohstoffen wie etwa Erzen, mit zwei parallelen, in entgegengesetzte Richtungen rotierenden Kompressionszylindern (10, 20), zwischen denen die Stoffe mitgenommen werden, dadurch gekennzeichnet, dass die zwei Zylinder auf beweglichen Achsen (15, 25) montiert sind und dass sie Schubmittel (18, 28) umfasst, die in der Lage sind, die zwei Zylinder einem im Laufe der Zeit variierenden Schub auszusetzen.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Schubmittel eingerichtet sind, einen im Laufe der Zeit zyklisch variablen Schub zu erzeugen.
  11. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der Schub im Laufe der Zeit sinusförmig variiert.
  12. Vorrichtung nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die Schubmittel in der Lage sind, einen Schub zu erzeugen, der derart variabel ist, dass er die Schwingungen ausgleicht, denen die zwei Zylinder ausgesetzt sind.
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
AT93403038T ATE191158T1 (de) 1993-12-15 1993-12-15 Verfahren und vorrichtung zur zerkleinerung von feststoffen, wie erze
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

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)

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

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EP93403038A Expired - Lifetime EP0658377B1 (de) 1993-12-15 1993-12-15 Verfahren und Vorrichtung zur Zerkleinerung von Feststoffen, wie Erze

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AT (1) ATE191158T1 (de)
DE (1) DE69328252D1 (de)

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Publication number Priority date Publication date Assignee Title
DE102011018705C5 (de) * 2011-04-26 2020-03-26 Khd Humboldt Wedag Gmbh Verfahren zur Regelung des Walzenspaltdrucks einer Rollenpresse und Rollenpresse
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

Family Cites Families (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
DE3743141A1 (de) * 1987-12-18 1989-06-29 Krupp Polysius Ag Gutbett-walzenmuehle
FR2660579B1 (fr) * 1990-04-06 1995-02-03 Marechal Jean Marc Procede de broyage de matieres premieres solides, tels que des minerais.

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ATE191158T1 (de) 2000-04-15
DE69328252D1 (de) 2000-05-04
EP0658377A1 (de) 1995-06-21

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