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WO1987005828A1 - Procede de commande d'un concasseur giratoire - Google Patents

Procede de commande d'un concasseur giratoire Download PDF

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Publication number
WO1987005828A1
WO1987005828A1 PCT/SE1987/000172 SE8700172W WO8705828A1 WO 1987005828 A1 WO1987005828 A1 WO 1987005828A1 SE 8700172 W SE8700172 W SE 8700172W WO 8705828 A1 WO8705828 A1 WO 8705828A1
Authority
WO
WIPO (PCT)
Prior art keywords
crushing
gap
width
mantle
crusher
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.)
Ceased
Application number
PCT/SE1987/000172
Other languages
English (en)
Inventor
Per GÖTHENQVIST
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.)
Sandvik SRP AB
Original Assignee
Svedala Arbra AB
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 Svedala Arbra AB filed Critical Svedala Arbra AB
Publication of WO1987005828A1 publication Critical patent/WO1987005828A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
    • B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
    • B02C2/047—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis and with head adjusting or controlling mechanisms
    • 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

Definitions

  • the present invention relates to a method for controlling a gyratory crusher comprising a crushing head provided with a first crushing mantle, and a second crushing mantle which, in combination with said first crushing mantle, defines a crushing gap, the width of which is adjustable by varying the relative axial posi ⁇ tions of said first and second crushing mantles by means of an adjusting device, the material to be crushed in a crushing operation being introduced into said gap, and a driving device causing said crushing head to perform a gyratory pendulum movement.
  • the crushing head is adjusted such that the gap between the first, inner crushing mantle and the second, outer crushing mantle will obtain a given predetermined width which depends on the desired crushing degree. Adjustment is carried out with a certain margin of safety to the maximally permissible load to which the crusher may be subjected.
  • the load on the crusher will vary, and if the gap width is adjusted to a value which is too low, the crusher may be subjected to overloading and damage.
  • the mantle surfaces are subjected to wear which increases the gap width and detracts from the production efficiency.
  • the position of the crushing head is corrected successive ⁇ ly, either manually or automatically, such that the gap width will again be the one initially set.
  • This object is achieved by means of a method which is characterised- in that the number of pressure surges in the hydraulic fluid in the adjusting device exceeding a predetermined pressure level are counted during a predetermined period of time, and that the relative positions of the crushing mantles are changed such that the width of the crushing gap is increased if the counted number of pressure surges exceeds a predetermined sum.
  • the frequency of the pressure surges is too high, the width of the crushing gap is increased such that any cakes can come loose, whereby damage to the crusher is prevented.
  • the gyratory crusher illustrated in the drawing comprises a shaft 1 which is eccentrically mounted at its lower end 2 and carries a crushing head 3, on the outer side of which a first, inner crushing mantle 4 is mounted.
  • a second, outer annular crushing mantle 5 surrounds the inner crushing mantle 4 and defines, together therewith, a gap 6 which, in the axial section shown in the drawing, has a downwardly decreasing width.
  • the shaft 1 is vertically movable by means of a hydraulic adjusting device comprising a tank 7 for hydraulic fluid, a pump 8, and a gas-filled container 9.
  • a motor 10 which is adapted, during operation, to cause the shaft 1 and the crushing head 3 to perform a gyratory pendulum movement, i.e. a movement during which the two crushing mantles 4, 5 approach one another along a rotating generatrix and are moved apart at a diametrically located generatrix.
  • the crusher is controlled by a control device 11 which at an input 12' receives input signals from a transducer 12 mounted on the motor and measuring the load on the motor.
  • the control device receives signals from a pressure trans ⁇ ducer 13 measuring the pressure in the hydraulic fluid of the adjusting device, and at an input 14', the device receives signals from a level transducer mounted on the bottom of the crusher and measuring the vertical 4 position of the shaft 1.
  • the control device 11 strives to maintain the crushing head 3 in a position in which the load on the crusher is 100%, the position of the crushing head 3 being controlled by pumping hydraulic fluid into or out of the tank 7 by means of the pump 8.
  • the load on the crusher is determined by the motor output and the pressure in the hydraulic fluid, and the 100% load is defined as the maximum output level determined for the motor and the maximum pressure level determined for the hydraulic fluid, which is obtained first when the crushing head 3 is being raised.
  • a control device will thus change the upward position of the crushing head so that the wear of the mantle surfaces is compensated for.
  • cakes may begin to form in the gap 6.
  • the load on the crusher then increases to a level exceeding the 100% level, and one or more pressure surges occur in the hydraulic fluid. If the load peak is sufficiently long and powerful, the hydraulic fluid will be pressed into the gas-filled container 9. When the cake has come loose, the shaft 1 and the crushing head 3 resume their earlier positions. However, the pressure surges are recorded by the pressure gauge 13 which supplies a signal to the controlling unit which, for a given predetermined period of time, counts the number of pressure surges exceeding a predetermined pressure value stored in the control unit.
  • the pump 8 is activated to pump hydraulic fluid into the tank 2 so that the crushing head 3 is lowered and any cakes can come loose.
  • the control unit also records the number of times the shaft 1 and the crushing head 3 have been lowered. If the number of these lowerings during a given period of time exceeds a predetermined sum, this indicates that the crusher

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)

Abstract

La présente invention concerne un procédé de commande d'un concasseur giratoire comprenant une tête de concassage munie d'un premier carter (4) et d'un second carter (5) qui, en combinaison avec ledit premier carter (4), définit un espace de concassage (6). La largeur de l'espace de concassage peut être réglée par modification des positions axiales relatives du premier et du second carters au moyen d'un dispositif de réglage hydraulique. Pour éviter tout endommagement du concasseur, on compte le nombre d'impulsions du fluide hydraulique du dispositif de réglage durant une période de temps prédéterminée et dépassant un niveau de pression prédéterminé. Si ce nombre dépasse une somme prédéterminée, on modifie les positions relatives des carters de façon à augmenter la largeur de l'espace de concassage (6). En outre, on compte le nombre de fois où l'on augmente la largeur de l'espace de concassage (6) durant une période de temps prédéterminée et, si ce nombre dépasse une somme prédéterminée, on arrête le chargement du concasseur et une alarme est déclenchée.
PCT/SE1987/000172 1986-04-04 1987-04-03 Procede de commande d'un concasseur giratoire Ceased WO1987005828A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8601504A SE456798B (sv) 1986-04-04 1986-04-04 Saett att styra en gyratorisk kross
SE8601504-7 1986-04-04

Publications (1)

Publication Number Publication Date
WO1987005828A1 true WO1987005828A1 (fr) 1987-10-08

Family

ID=20364044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000172 Ceased WO1987005828A1 (fr) 1986-04-04 1987-04-03 Procede de commande d'un concasseur giratoire

Country Status (2)

Country Link
SE (1) SE456798B (fr)
WO (1) WO1987005828A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042732A (en) * 1990-05-31 1991-08-27 Nordberg Inc. Apparatus for high-yield low-waste conical crushing
US5725163A (en) * 1994-01-17 1998-03-10 Nordberg-Lokomo Oy Hydraulic control system for gyratory crusher provided with safety system for overload conditions
WO2005007293A1 (fr) 2003-02-10 2005-01-27 Sandvik Ab Procede et dispositif de commande pour concasseur
WO2007051890A1 (fr) * 2005-11-02 2007-05-10 Metso Minerals Inc. Concasseur et procédé de commande de ce concasseur
WO2012087219A1 (fr) * 2010-12-20 2012-06-28 Sandvik Intellectual Property Ab Circuit hydraulique et procédé de commande d'un broyeur à cône giratoire
WO2013153283A1 (fr) * 2012-04-12 2013-10-17 Metso Minerals, Inc. Système et procédé permettant de surveiller et de commander un broyeur, broyeur et procédé permettant de régler un broyeur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511886C2 (sv) * 1992-01-31 1999-12-13 Svedala Arbra Ab Sätt att styra en gyratorisk kross

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117734A (en) * 1961-03-17 1964-01-14 Duval Sulphur & Potash Company Method and system for treating ore
SE411102B (sv) * 1973-01-02 1979-12-03 Svedala Arbra Ab Anordning for automatisk krosspaltreglering vid en kross
US4187991A (en) * 1977-09-08 1980-02-12 Babbitless Unloading
SE413372B (sv) * 1973-12-05 1980-05-27 Svedala Arbra Ab Anordning med overbelastningsskydd vid en kross

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117734A (en) * 1961-03-17 1964-01-14 Duval Sulphur & Potash Company Method and system for treating ore
SE411102B (sv) * 1973-01-02 1979-12-03 Svedala Arbra Ab Anordning for automatisk krosspaltreglering vid en kross
SE413372B (sv) * 1973-12-05 1980-05-27 Svedala Arbra Ab Anordning med overbelastningsskydd vid en kross
US4187991A (en) * 1977-09-08 1980-02-12 Babbitless Unloading

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042732A (en) * 1990-05-31 1991-08-27 Nordberg Inc. Apparatus for high-yield low-waste conical crushing
US5725163A (en) * 1994-01-17 1998-03-10 Nordberg-Lokomo Oy Hydraulic control system for gyratory crusher provided with safety system for overload conditions
US7591437B2 (en) 2003-02-10 2009-09-22 Sandvik Intellectual Property Ab Method and device for controlling a crusher, and a pointer instrument for indication of load on a crusher
WO2005007293A1 (fr) 2003-02-10 2005-01-27 Sandvik Ab Procede et dispositif de commande pour concasseur
CN101316658B (zh) * 2005-11-02 2011-06-08 美特索矿物公司 控制破碎机的方法和破碎机
US7942358B2 (en) 2005-11-02 2011-05-17 Metso Minerals Inc. Method for controlling a crusher and a crusher
WO2007051890A1 (fr) * 2005-11-02 2007-05-10 Metso Minerals Inc. Concasseur et procédé de commande de ce concasseur
AU2005337968B2 (en) * 2005-11-02 2011-06-23 Metso Outotec Finland Oy A method for controlling a crusher and a crusher
EP1984117A4 (fr) * 2005-11-02 2013-11-13 Metso Minerals Inc Concasseur et procédé de commande de ce concasseur
WO2012087219A1 (fr) * 2010-12-20 2012-06-28 Sandvik Intellectual Property Ab Circuit hydraulique et procédé de commande d'un broyeur à cône giratoire
US8496195B2 (en) 2010-12-20 2013-07-30 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
RU2573330C2 (ru) * 2010-12-20 2016-01-20 Сандвик Интеллекчуал Проперти Аб Гидравлический контур и способ управления гираторной конусной дробилкой
AU2011345421B2 (en) * 2010-12-20 2016-03-10 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
WO2013153283A1 (fr) * 2012-04-12 2013-10-17 Metso Minerals, Inc. Système et procédé permettant de surveiller et de commander un broyeur, broyeur et procédé permettant de régler un broyeur
US10710088B2 (en) 2012-04-12 2020-07-14 Metso Minerals, Inc. System and method for monitoring and controlling a crusher, a crusher and a method for adjusting a crusher

Also Published As

Publication number Publication date
SE456798B (sv) 1988-11-07
SE8601504L (sv) 1987-10-05
SE8601504D0 (sv) 1986-04-04

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