US3568938A - Controlling the granulometry of material - Google Patents

Controlling the granulometry of material Download PDF

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US3568938A
US3568938A US730059A US3568938DA US3568938A US 3568938 A US3568938 A US 3568938A US 730059 A US730059 A US 730059A US 3568938D A US3568938D A US 3568938DA US 3568938 A US3568938 A US 3568938A
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mesh
output signal
rate
flow
granulometry
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Paul Marcel Emile Barrot
Claude Yves Lucien Lemardley
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Babbitless SA
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Babbitless SA
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D5/00—Control of dimensions of material
    • G05D5/04—Control of dimensions of material of the size of items, e.g. of particles
    • G05D5/06—Control of dimensions of material of the size of items, e.g. of particles characterised by the use of electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

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  • the present invention relates to a method for the automatic regulation of the particle size distribution of granules produced by grinders and crushers, particularly gyratory grin ders and crushers, in such a manner as to maintain the particle size distribution permanently at a desired value irrespective of the physical state of the materials treated and the wear of the grinding parts.
  • the invention likewise relates, to the devices serving to carry out this method, and also to grinders and crushers, particularly gyratory grinders and crushers, which are equipped therewith.
  • the particle size distribution, in this Specification hereinafter referred to as the granulometry, of crushed or ground mineral products is of capital importance for an increasing number of industrial applications, and the ability to regulate granulometry at will in a reliable manner is becoming an essential need.
  • the situation is for example as follows:
  • a. crushers or grinders of the gyratory" type a device is provided for regulating the relative positions of the inner and outer crushing cones;
  • a device for adjusting the relative position of the fixed and movable jaws
  • a device for regulating the feed
  • a device for adjusting the spacing of the cylinders.
  • the fineness of a product leaving a crusher, grinder, or similar apparatus is genenally defined by a single point on this granulometric curve, this point being situated near the apex of the curve corresponding to the largest particles contained in these products.
  • a product has a fineness of 10 percent material retained on a screen of 20mm square mesh, or else that the crusher was adjusted to give at the outlet a fineness of i0 percent material retained on the screen of 20 mm square mesh; verification of this fineness is then effected by manual or mechanical screening.
  • verification of the granulometry of the product may be replaced by verification of the fineness of the product, which is a considerably simpler check because it relates to a single point on the granulometric curve;
  • the invention consists in compensating continuously or periodically, from a point of a curve obtained in the course of operation, any variations of fineness and hence of granulometry which may occur during the operation of an apparatus for any reason whatsoever, such as for example the wear of the grinding parts or variations in the nature, physical state, or granulometry of the products feeding the apparatus.
  • the invention thus has the object of regulating and automatically maintaining a constant granulometry from a single point of a curve selected in accordance with requirements, and makes it possible to follow a programme defined in advance for a given working period, whatever the evolution of parameters capable of varying the granulometry, whether these relate to the feed or to wear of the grinding parts of the apparatus.
  • a method of controlling the output granulometry of a material from a crusher or grinder,.for which a characteristic family of curves has been established defining the granulometry of the material for different settings of the grinder or crusher comprises;
  • the quantities representing the material retained on a given mesh and the material passing through may be taken from the main circuit or from a sampling circuit; they may be either the quantity of material retained and the quantity of material passing through the given mesh or the quantity of material retained on the given mesh and the total production, or finally they may be the amount of material passing through and the total production.
  • all or part of the materials crushed to a determined mesh may advantageously be screened with the aid of a vibrating screen or other suitable apparatus, the quantities representing material retained and material passing through for the determined mesh being measured, and these measurements being transmitted to an electric, electronic, or other calculating device to determine the ratio between the said quantities.
  • the result given by the calculator serves to operate any suitable known means for the purpose of modifying the relative position of the grinding parts if this result, that is to say this ratio, is not within a predetermined range.
  • the ratio of these two values will no longer be within the detennined range and the automatic means will modify the relative position of the grinding parts so as to reduce the amount of material retained and thus bring the ratio back inside the range.
  • the automatic means will cause an alteration in the relative position of the grinding parts in the opposite direction.
  • the method according to the invention may be applied to all types of grinders and crushers, and particularly to suspension type or remotely controlled hydraulically adjustable gyratory crushers.
  • Known apparatuses contain a safety device which, by automatically moving the grinding parts away from one another as soon as an abnormal force occurs, makes it possible to remove foreign bodies which may be contained in the materials to be ground so as to prevent clogging between the grinding parts.
  • the presence of this device is not compatible with the granulometric stability which is desired and is obtained according to the present invention unless, after elimination of the overload, it automatically returns the grinding parts to the exact relative position which they occupied before the intervention of the safety device.
  • apparatus for carrying out the method according to the invention comprises a detector for sensing the displacement of one of the grinding parts, a contactor connected to said detector and containing at least one pancake coil having a number of contact studs, some of which transmit the various positions of the grinding part to a recorder or to a display panel, while the others transmit the information of a grinding programme, taking into account the positions indicated, to the control means of the grinder or crusher.
  • a gyratory crusher In a gyratory crusher it is the position of the inner grinding cone which varies in relation to that of the outer grinding cone, the shaft carrying the inner grinding cone performing a pendular movement and also a movement of rotation about itself which is due to the forces applied by the grinding of the materials on the inner cone.
  • the position detecting device is arranged so as to transmit the axial displacement of the shaft into a rectilinear movement, despite the existence of the pendular movement of said shaft.
  • the position detecting device comprises a collar surrounding and secured to the shaft so as to allow relative rotary movement of the shaft with respect thereto but so as to prevent relative axial movement therebetween, a feeler rod which is integral with the collar at one end and the other end of which carries a part of circular section, such as a cylinder or a sphere, a detector, such as a fork, disposed at the level of said part so as to follow only the axial displacement of the shaft and to allow said part to make all eccentric movements, a second feeler rod rigidly connected to the detector and parallel to the axis of the crusher in such a manner as to be able to slide freely in a cylinder fixed on the frame of the crusher, said second feeler rod being connected to control, and recording means in electrical contact with hydraulic means adapted to cause axial displacement of the shaft.
  • the movement detector collar is preferably held fixed in respect of rotation by means of flexible parts capable of absorbing the eccentric movement due to the pendular movement of the shaft whilst still enabling the shaft to rotate in the bore in said collar.
  • the collar therefore follows the rising and falling movements of the shaft dictated by the adjustment.
  • the part of circular section is, for example, a roller or a ball which, because of the mechanical connection, follows the movementdescribed by the shaft during the operation of the apparatus. This part consequently performs an eccentric movement corresponding to the pendular movement of the shaft.
  • the assembly comprising the collar, the feeler, and the part of circular section may be replaced by a body of revolution coaxial to the shaft and mounted on and rotating with the latter.
  • the detector is preferably a U-shaped fork which encloses the roller or ball or the outer edge of the body of revolution, namely a cylinder or sphere, in order to neutralize the pendular movement and to undergo only the axial displacement of the shaft.
  • the distance between the two arms of the U-shaped fork is made sufficiently great to enable the eccentric movement of the part to take place freely and to ensure that the fork will follow only the axial movement of the shaft. If the shaft performs a rising or falling movement it drives the detector or fork by means of the assembly comprising the collar, feeler, ball or roller or the body of revolution.
  • the rod of the detector is prevented from moving under its own weight by means of for example a compression spring, stuffing-box, seal, or braking plate bearing against the rod carrying the detector, by magnetic braking (permanent magnet or electromagnet) or by any other known braking device.
  • a compression spring stuffing-box, seal, or braking plate bearing against the rod carrying the detector
  • magnetic braking permanent magnet or electromagnet
  • the method according to the invention also permits the automatic regulation of p a group comprising a plurality of crushers, grinders, or similar apparatuses, constituting for example a complete crushing installation, so that the final granulometry of the products leaving the installation will be in conformity with a predetermined granulometry.
  • FIG. 1 previously referred to, is a family of characteristic granulometric curves obtained from hard, tough materials
  • FlG. 2 is a diagrammatic view of a gyratory crusher to which control of the total production of the crusher is applied;
  • F lG. 3 is a diagrammatic view of a gyratory crusher in which the control is effected by samples taken from the production of the crusher;
  • FIG. 4 is a diagrammatic view of a variant of the control system shown in FIG. 3;
  • FIG. 5 shows a view in section of an automatic control device for the movable crushing part
  • FIG. 6 is a view in section seen from arrow F along the line VI-Vi in FIG. 5;
  • FIG. 7, 7a, 7b, 7c is a developed wiring diagram of the control system of the device regulating the position of the movable grinding part with the aid of the indications;
  • FIG. 8 is a view of a manual device controlling the grinding position.
  • FIGS. 2 and 3 show the gyratory crusher 1 with its outer crushing cone 1a and its inner crushing cone 1b.
  • the installation contains a discharge conveyor 2, a screening device 3 including meshes 3a, 3b and the determining mesh 3c a conveyor 4' carrying the material retained at mesh 3c to a first weighing apparatus, and a conveyor tSreceiving the material passing through the mesh 30 and carrying it to the outlet after weighing in a weighing apparatus 7 of any known type.
  • the output signals from the two weighing apparatuses 5 and 7 are connected to an electronic calculator 8 which calculates the ratio of the weights measured by the two apparatuses.
  • the output 8' of the calculator 8 represents the value of the ratio and is transmitted to the control of any known type of hydraulic device 9 which effects the displacement, when required, of the suspension actuator It by means of fluid pumped through the pipe 9.
  • the transmission of the output signal of the calculator 8 is interrupted when the value of the ratio material retained/material passing through remains within a predetermined range of values related to the granulometric curves of the apparatus.
  • the range of regulation of the predetermined ratio must be fairly large, or else the signal must be transmitted in the form of pulses with time delay.
  • One or the other of the weighing apparatuses 5 and 7 may be replaced by a weigher 10 (FIG. 2) which weighs all of the production of the crusher on the conveyor 2.
  • a weigher 10 (FIG. 2) which weighs all of the production of the crusher on the conveyor 2.
  • For the automatic remote control of the adjustment of the crusher use is then made either of the ratio material retained/total output or of the ratio material passing through/total output.
  • the method according to the invention may therefore be carried out in the majority of cases by simply installing weighing machines and a servo control circuit.
  • the granulometric verification may also be effected on only a fraction of the production of the crusher as shown in FIG. 3, thus restricting the size of the appliances in the control circuit.
  • the samplings are effected continuously or at regular intervals at the outlet of the crusher 1 by means of a sampler 10s which diverts the flow of material from the crusher outlet.
  • the materials thus removed are poured into a regulator butter hopper 11, from which they are continuously extracted by a feeder 12 situated above a screening apparatus 3 making a single cut at the selected mesh.
  • Material retained at this mesh is poured on to a conveyor 4 and weighed by an apparatus 5; material passing through is poured on to a conveyor 6 and weighed by a weighing machine 7.
  • the output signals of the weighing machines are transmitted to the calculator 8, the output of which supplies signals representing the values of the ratio of the weighings; these signals operate the control of the hydraulic device 9 for the purpose of displacing the suspension actuator 10 if necessary.
  • the materials which have not been poured into the buffer hopperll fall into a spout 13 and on to a conveyor 14, which carries them to the point of utilization where they rejoin the materials from the conveyor 6.
  • the servo control circuit like that illustrated in FIG. 2, is equipped with means for compensating the time lag existing between the verification and adjustment operations.
  • the servo control circuit acts only when the weighing machines register a minimum load, a suitable device (for example a relay) cutting this circuit automatically as soon as the feeding of the conveyors on which the weighings are made is interrupted.
  • a suitable device for example a relay
  • the components of this circuit may be electric, electronic, hydraulic, pneumatic, or of any other nature and components of different natures may be associated with one another to form an automatic servo control assembly.
  • the crusher 1 delivers to a conveyor 2, which drops the ground products on to a screen 3, which makes a single cut at the selected mesh for one granulometric class of products.
  • the hydraulic device 9 receives the instruction to increase the tightness of the crusher adjustment i.e. to increase the quantity passing through the screen, and if the ratio 5b/ 5a 1 the device receives instructions to reduce the tightness.
  • FIGS. 5 and 6 illustrate an automatic device for sensing and controlling the position of the grinding parts, which comprises another characteristic of the present invention.
  • the gyratory crusher illustrated in FIG. 5 is provided with an inner grinding cone 17, the position of which varies in relation to that of the outer grinding cone 18, the shaft 19 carrying the inner grinding cone performing both a pendular movement and a rotatory movement due to the forces applied to the grinding cone by the crushing of the materials.
  • a collar 20 surrounds the shaft 19, on which it is held fixed in respect of rotation by means of flexible parts 27 which absorb the eccentric displacements of the shaft, while enabling the shaft to turn in the collar.
  • a first feeler 21 is secured to the collar 20 and is provided at its other end with a part of circular section, such as a ball or a cylinder 22.
  • a fork 15 constitutes the detector, which is disposed at the level of the ball 22 and follows only the axial displacement of the shaft 19.
  • a second feeler 23 is provided to the collar 20 and is provided at its other end with a part of circular section, such as a ball or a cylinder 22.
  • a fork 15 constitutes the detector, which is disposed at the level of the ball 22 and follows only the axial displacement of the shaft 19.
  • the feeler 23 may be rigidly connected to a piston slidable in the cylinder 24.
  • the feeler 23 carries a finger 23a which engages in a link of an endless chain 26 passing over three cogged wheels 23' rotatable on shafts fixed in a casing 25a secured to the frame 25 of the crusher.
  • a contactor 16 turns with one of the wheels 23 and effects the recording and control of the movements of the crushing parts.
  • the feeler 23 supporting the detector 15 is prevented from moving by seals 28 in such a manner that the detector is held fixed in order that the movement described by the sphere, cylinder, or roller 22 will be inscribed in the detector without touching its sides.
  • the contactor 16 connected to the detector is provided with at least one pancake having multiple contact studs, some of which are reserved for the different positions assumed by the movable grinding cone, while the others receive the control orders for the position to be given to said cone.
  • the contactor 16 is connected to another contactor XXX comprising three pancakes 30, 31, 32 having multiple contact studs, which is controlled by an impulse relay 29 receiving instructions from the weighing measurement transmission apparatus 8, which has the effect either of increasing or of reducing the outlet aperture of the crusher.
  • the contactor of the hydraulic device 9 contains three pancakes, which fulfill the following functions:
  • the first (30) is reserved for the raising operations, that is to say it acts through relays 33 and 34 to control the motor-pump unit 36, which injects the fluid into the actuator 35 serving to adjust the relative position of the grinding parts;
  • the second (31) is reserved for the lowering operations, that is to say it acts through relays 37 and 38 to open the electrically controlled discharge valve 39 of the hydraulic system;
  • the third (32) serves solely to cancel the raising or lowering operations as soon as the desired position has been reached as indicated by the pancake contactor 16 connected directly to the positioning detector (21-22 in FIG. 5).
  • the circuit diagram shows how the control operations are carried out by means of the different elements.
  • the contactor XXX comprising the three pancakes 30, 31, 32 which are mounted coaxially is controlled by an impulse relay 29 capable of acting in either direction.
  • the pancakes are connected electrically in such a manner that there is off setting by one contact stud between the three pancakes, that is to say the stud 1 of the lowering pancake is connected to the stud 2 of the cancelling pancake, which in turn is connected to stud 3 of the raising pancake, etc.
  • the contactor 16 is electrically connected to the cancelling pancake 32 without any offsetting of the contact studs and in these circumstances the cancellation of all orders is effected as soon as the detector 21, 22 causes the pancake contactor 16 associated with it to assume the same stud number as that indicated on the cancellation" pancake 32 of the automatic box.
  • the time delay relay 42 is provided with an. assembly comprising a step-by step relay 44 which counts the number of cycles in a predetermined time with the aid of another time delay relay 45operated simultaneously from the commencement of the first cycle.
  • an alarm relay circuit 46 is operated and this simultaneously interrupts the current supply tothe crusher motor 47 and also to the electric pump unit 36. If on the other hand the predetermined number of cycles has not been reached during this delay, the time delay relay 45 returns the cycle counter relay 44 to its zero position, that is to say to its original position, and the crusher continues to operate normally.
  • the step-by-step relay counting the number of cycles cancels this information.
  • the manual control contains in addition a linkage 225 which is provided at one end with a roller 226 disposed on the trajectory of the cylinder 223 and articulated at its other end on a casing 227.
  • This casing can be fixed in various positions by tightening the knob 228', which is adapted to move in a slot in a casing 228 secured to the frame 25.
  • the casing 228 contains a switch 229 operated by a rod 230, one end of which is in contact with the linkage 225 and the switch 229 is connected by wiring 231 to an acoustic alarm 232.
  • said simultaneous measurements being made at predetermined frequencies; r c. comparing the simultaneous measurements to provide a signal denoting the ratio thereof and comparing this signal with a desired value to provide an output signal, said desired value being obtained. from one of said family of curves; and V d. causing said output signal to generate control forces adjusting the setting of the said grinding faces of said apparatus so as to restore the output signal to the desired value.
  • a method according to claim 1 comprising the step of automa tically sensing the relative positions of the grinding faces of said grinder so as to indicate the setting thereof.
  • a method according to claim 3 including sensing the relative positions of the grinding faces to automatically control the setting thereof.
  • a method of controlling the granulometry of the output material from a grinder comminution apparatus for which a characteristic family of curves has been established defining the granulometry of the material for different settings of the grinder comprising:
  • a method according to claim 5 comprising the step of automatically sensing the relative positions of the grinding faces of said apparatus so as to indicate the setting thereof.
  • a method according to claim 7 including sensing the relative positions of the grinding faces to automatically control the setting thereof.
  • control equipment comprising:
  • control equipment comprising:
  • control equipment comprising:
  • d. means for adjusting the spacing of the grinding faces in response to the output signal.
  • An apparatus including a conveyor belt and wherein the means for measurement of the rate of flow comprises a weighing machine adapted to weigh the quantity of material on a specific length of conveyor belt.
  • control equipment comprising:
  • an electronic calculator for comparing said simultaneous measurements to provide a signal denoting the ratio thereof and for comparing this signal with a desired value to provide an output signal, said desired value being obtained from one of said family of curves;
  • the sensing and controlling means comprises a collar surrounding and secured to the shaft so as to allow relative rotary movement of the shaft with respect thereto but so as to prevent relative axial movement therebetween, a feeler rod which is integral with the collar at one end and the other end of which carries a part of circular section, a detector, disposed at the level of said part so as to follow only the axial displacement of the shaft and to allow said part to make all eccentric movements, a second feeler rod rigidly connected to the detector disposed parallel to the axis of the grinder, a cylinder fixed on the frame of the grinder, within which said feeler rod is slidable, and control and recording means connected to said second feeler rod and also to hydraulic means adapted to cause axial displacement of the shaft.
  • Equipment according to claim 19 wherein the collar is prevented from rotating by means of a flexible connection 21.
  • Equipment according to claim 20 wherein the collar, feeler and the part of circular section are replaced by a body of revolution, mounted on the shaft so as to be coaxial and rotatable therewith.
  • Equipment according to claim 20 wherein the detector comprises a fork enclosing the part of circular section the arms of the fork being spaced such that eccentric movements of the part of circular section are inscribed within the space between the arms without touching them.
  • Equipment according to claim 22 comprising means disposed in the cylinder and preventing movement of the detector under its own weight.
  • Equipment according to claim 24 wherein the means disposed in the cylinder comprise friction seals disposed between the feeler rod and the cylinder.
  • an electronic calculator for comparing said simultaneous measurements to provide a signal denoting the ratio thereof and comparing this signal with a desired value to provide an output signal, said desired value being obtained from one of said family of curves,
  • means for sensing and controlling the spacing of the grinding faces comprising a collar surrounding and secured to the shaft so as to allow relative rotary move ment of the shaft with respect thereto but so as to prevent relative axial movement therebetween, a feeler rod which is integral with the collar at one end and the other end of which carries a part of circular section, a detector disposed at the level of said part so as to follow only the axial displacement of the shaft and to allow said part to make all eccentric movements, a second feeler rod rigidly connected to the detector and parallel to the axis of the crusher in such a manner as to be able to slide freely in a cylinder fixed on the frame of the crusher, said second feeler rod being connected to control and recording means in electrical contact with hydraulic means adapted to cause axial displacement of the shaft, said control and recording means comprising at least one rotatable con tactor mechanically connected to the detector in such a manner so as to convert axial movement of the latter into rotational movement of the former, the contactor comprising a multicontact pancake switch
  • Equipment according to claim 26 including an overload device adapted to separate the grinding faces of the crusher upon fluid pressure in the actuator exceeding a predetermined value.
  • Equipment according to claim 28 including means for cancelling the output signal from the calculating means during operation of the overload device.
  • Equipment according to claim 29 wherein further time delay means are provided whereby the crusher can be stopped if the overload device operates more than a predetermined number of times during the activation period of the further time delay.
  • a method of controlling the granulometry of the output material from a grinder comminution apparatus for which a characteristic family of curves has been established defining the granulometry of the material for different settings of the grinding faces comprising: 7
  • control equipment comprising:
  • control equipment comprising;
  • control equipment comprising;
  • calculating means for comparing the values of the two measurements and for providing an output signal propor tional to the ratio thereof and d. means for adjusting the spacing of the grinding faces in response to the output signal.
  • control equipment comprising;
  • calculating means for comparing the values of the two measurements and for providing an output signal proportional to the ratio thereof and d. means for adjusting the spacing of the grinding faces in response to the output signal.
  • control equipment comprising:
  • an electronic calculator for comparing said simultaneous measurements to provide a signal denoting the ratio thereof and for comparing this signal with a desired value to provide an output signal, said desired value being obtained from one of said family of curves;
  • control equipment comprising;
  • an electronic calculator for comparing said simultaneous measurements to provide a signal denoting the ratio thereof and for comparing this signal with a desired value to provide an output signal, said desired value being obtained from one of said family of curves;
  • hydraulic apparatus for adjusting the setting of the said grinding faces of said apparatus so as to restore the output signal to the desired value

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
US730059A 1967-05-31 1968-05-17 Controlling the granulometry of material Expired - Lifetime US3568938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR108609A FR1533937A (fr) 1967-05-31 1967-05-31 Procédé de réglage automatique de la granulométrie à la sortie des broyeurs et concasseurs, notamment giratoires et appareils équipés selon ce procédé

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US3568938A true US3568938A (en) 1971-03-09

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US (1) US3568938A (en:Method)
AT (1) AT291726B (en:Method)
BE (1) BE713161A (en:Method)
CH (1) CH489280A (en:Method)
DE (1) DE1757649A1 (en:Method)
ES (1) ES354487A1 (en:Method)
FI (1) FI52287C (en:Method)
FR (1) FR1533937A (en:Method)
GB (1) GB1185447A (en:Method)

Cited By (5)

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US3716196A (en) * 1970-04-17 1973-02-13 Hazemag Gmbh Method of operating an impact comminutor
US3807415A (en) * 1970-05-11 1974-04-30 Hauni Werke Koerber & Co Kg Method of comminuting and drying of tobacco leaves
US4667887A (en) * 1984-11-17 1987-05-26 Kotobuki Engineering & Manufacturing Co., Ltd. Sand producing method and apparatus
US4856716A (en) * 1987-09-10 1989-08-15 Boliden Aktiebolag Gyratory crusher control
US20090008486A1 (en) * 2007-07-06 2009-01-08 Sandvik Intellectual Property Ab Measuring instrument for gyratory crusher and method of indicating the functioning of such a crusher

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457716A1 (fr) * 1979-05-29 1980-12-26 Sigoure Gerard Broyeur pour les industries agro-alimentaires, chimiques et para-chimiques
RU2337756C1 (ru) 2007-01-31 2008-11-10 Константин Евсеевич Белоцерковский Способ управления технологическими параметрами конусной дробилки
AU2012203455B2 (en) * 2007-01-31 2014-09-04 Sandvik Intellectual Property Ab Method for controlling process parameters of a cone crusher
RU2450860C2 (ru) * 2010-07-19 2012-05-20 Александр Иванович Сапожников Конусная дробилка
DE102021134145A1 (de) 2021-12-21 2023-06-22 Kleemann Gmbh Verfahren zur Einstellung eines Betriebszustands zumindest einer mobilen Mineral-Bearbeitungsanlage
CN115957880B (zh) * 2023-01-05 2023-07-28 湖南中科电气股份有限公司 整形机颗粒度自动控制方法

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US3092337A (en) * 1959-08-10 1963-06-04 Combustion Eng Pulverizing system with indicator and control
US3305181A (en) * 1962-11-27 1967-02-21 Babbitless Sa Gyratory crushers
US3358938A (en) * 1965-07-08 1967-12-19 Union Carbide Canada Ltd Method of control of particle size utilizing viscosity
US3480212A (en) * 1967-02-23 1969-11-25 Reserve Mining Co Control apparatus

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US3092337A (en) * 1959-08-10 1963-06-04 Combustion Eng Pulverizing system with indicator and control
US3305181A (en) * 1962-11-27 1967-02-21 Babbitless Sa Gyratory crushers
US3358938A (en) * 1965-07-08 1967-12-19 Union Carbide Canada Ltd Method of control of particle size utilizing viscosity
US3480212A (en) * 1967-02-23 1969-11-25 Reserve Mining Co Control apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716196A (en) * 1970-04-17 1973-02-13 Hazemag Gmbh Method of operating an impact comminutor
US3807415A (en) * 1970-05-11 1974-04-30 Hauni Werke Koerber & Co Kg Method of comminuting and drying of tobacco leaves
US4667887A (en) * 1984-11-17 1987-05-26 Kotobuki Engineering & Manufacturing Co., Ltd. Sand producing method and apparatus
EP0182474A3 (en) * 1984-11-17 1987-11-25 Kotobuki Engineering & Manufacturing Co Ltd Sand producing method and apparatus
US4856716A (en) * 1987-09-10 1989-08-15 Boliden Aktiebolag Gyratory crusher control
US20090008486A1 (en) * 2007-07-06 2009-01-08 Sandvik Intellectual Property Ab Measuring instrument for gyratory crusher and method of indicating the functioning of such a crusher
US7845237B2 (en) * 2007-07-06 2010-12-07 Sandvik Intellectual Property Ab Measuring instrument for gyratory crusher and method of indicating the functioning of such a crusher

Also Published As

Publication number Publication date
ES354487A1 (es) 1970-03-01
FI52287C (fi) 1977-08-10
BE713161A (en:Method) 1968-08-16
FI52287B (en:Method) 1977-05-02
CH489280A (fr) 1970-04-30
DE1757649A1 (de) 1972-07-27
FR1533937A (fr) 1968-07-26
GB1185447A (en) 1970-03-25
AT291726B (de) 1971-07-26

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