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WO2014127989A1 - Procédé pour la commande et/ou la régulation d'une installation de broyage et installation de broyage - Google Patents

Procédé pour la commande et/ou la régulation d'une installation de broyage et installation de broyage Download PDF

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Publication number
WO2014127989A1
WO2014127989A1 PCT/EP2014/052132 EP2014052132W WO2014127989A1 WO 2014127989 A1 WO2014127989 A1 WO 2014127989A1 EP 2014052132 W EP2014052132 W EP 2014052132W WO 2014127989 A1 WO2014127989 A1 WO 2014127989A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinder
parameter
grinding
derivative
separator
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/EP2014/052132
Other languages
German (de)
English (en)
Inventor
Andreas Lekscha
Bernd Zehentbauer
Victor Seleznev
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2014127989A1 publication Critical patent/WO2014127989A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • 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 invention relates to a method for controlling and / or regulating a grinding plant and a grinding plant.
  • a grinding plant In addition to the actual grinding device, such as a ball mill, in which the material is ground, a grinding plant also comprises a separating device, such as a classifier, with which the ground material is separated, ie classified, depending on the grain size or grain size. In this case, sufficiently ground particles (finished grade) leave the separator over the overflow, the insufficiently ground particles in the lower run. The latter are returned to the grinder and thus added to the grinding process again.
  • the grinding plant comprises a separator in the form of a magnetic separator. This is designed to separate nonmagnetic ferro- magnetic parts of the ground material leaving the separator overflow.
  • the pulping process is used without speed control of the grinder, which significantly reduces the effectiveness of the grinding processes.
  • the material comminution process proceeds in one of the following operating modes: - cascade operation / cascade operation (without lifting of the grinding media),
  • a dead zone is present in the central part of the ball load.
  • the core of non-moving spheres performs virtually no work of mass reduction, leading to an increase in specific energy consumption. This core represents approximately 30% of the total volume of the grinding media. If the core is made to participate in the crushing work, the productivity of the milling equipment can be improved without increasing the power consumption.
  • the grinding process depends on a number of factors (ore grinding, drum speed, volume of drum filling with orbital ball load, ratio of solid to liquid in the grinding device, state of wear of the balls and the lining, etc.), which change in real time in a sufficiently broad area.
  • the task of constant-speed process control is to stabilize the process variables (raw-material throughput, amount of circulating sands, volume of drum loading, percentage solids in the outlet of the grinder, solid or finished-product proportion in the outlet of the classifier, discharge volume).
  • the variations in the quality of the raw material as well as the change in performance mean that the working range of the system differs from an optimal range. This level leads to an increase in relative energy consumption and has a negative impact on the plant's life cycle. It is therefore an object of the invention to provide a method for controlling and / or regulating a grinding plant and a grinding plant, in which the efficiency is increased.
  • the first object is achieved by a method for controlling and / or regulating a grinding plant with the features of claim 1.
  • Such a grinding plant comprises a variable speed grinder for grinding a substance, a separator for classifying the ground material and a separator downstream separator.
  • the method comprises the following steps:
  • the grinding plant is controlled and / or regulated depending on the sign of the derivative.
  • the second object is achieved by a grinding plant with the features of claim 10.
  • a grinding plant on a milling device for grinding a substance and a separator for classifying the ground material and a control / regulating unit in which a software for performing the inventive Method is implemented.
  • FIG 2 is a diagram with the qualitative dependence of
  • FIG 3 is a diagram of the qualitative dependence of the intensity for the energy E ord of the productivity of the milling means according to the initial ore Q r,
  • FIG. 7 shows a diagram with the qualitative dependence of the related energy intensity E ord on the overflow density of the separating device R c i
  • FIG. 8 shows a diagram with the qualitative dependence of the energy intensity E ord on the ratio "liquid / solid" W / F in the grinding device
  • 9 shows a diagram with the qualitative dependence of
  • Productivity of the grinder after the output Q x of the separator overflow density 11 shows a diagram with the qualitative dependence of the related filling volume F ord of the grinding device on the ratio "liquid / solid" W / F,
  • FIG. 15 shows a diagram with the qualitative dependency of the
  • FIG. 1 shows a grinding plant 2 with which a rock S to be ground, such as, for example, iron ore, is ground and classified.
  • the material S to be ground is first fed to a variable-speed grinder 4 and ground.
  • the grinder is driven by an output 5.
  • the ground substance S enters a separation zone.
  • Device 6 as a classifier, in which the milled substance S is separated depending on the grain size or grain size, that is classified.
  • the separator is driven by a motor 7. In this case, sufficiently ground particles of the substance S leave the separating device 6 via the overflow 8, the particles which have not been ground sufficiently leave the separating device 6 through the underflow 10 and are returned to the grinding device 4.
  • the milling device 4 leaving the overflow 8 particles are then fed to a separator 12, in the embodiment of a magnetic separator. This is designed to separate ferromagnetic parts of the ground substance S from non-magnetic.
  • the ferromagnetic parts leave the separator 12 as an intermediate product at the exit 14.
  • the non-ferromagnetic parts leave the separator 12 in its talling 16.
  • the grinding plant 2 comprises measuring devices for detecting measured variables 17, which are used for controlling / regulating the grinding plant 2. These are in detail a measuring device 18 for detecting the circulation load C, a measuring device 20 for detecting the power of the drive of the separating device 6 Icl, a measuring device 22 for detecting the water consumption of the separating device 6 Gvk, a measuring device 24 for detecting the Finished-class content after the grinder 4 Rm, Sm, a measuring device 26 for detecting the finished-class content at the overflow 8 of the separating device 6
  • the grinding plant 2 includes various controllers that regulate the grinding process. It is a controller 44 for feeding the grinder 4 with the material to be ground S, a controller 46 for regulating the ratio liquid / solid in the grinder 4 W / F, a controller 48 for controlling the speed of the grinder. 4 , a controller 50 for controlling the computing class of the overflow 8 of the separator 6.
  • the measured variables 17 are detected by a control / regulating unit 51. This calculates on the basis of the measured variables control variables 52, which forwards them to the controllers mentioned above.
  • the grinding plant 2 is now controlled / regulated by means of the method according to the invention. To do this, the following steps are performed:
  • the grinding plant is controlled and / or regulated depending on the sign of the derivative.
  • the mains frequency control for the drive 5 in this case an electric motor
  • raw material throughput of the grinder 4 Qr filling volume F
  • V of the grinder 4 with the material to be ground S in this case, ore mass and ball load
  • power consumption Pdv of the drive 5 water consumption of the grinder 4 Qvm and separator 6 Qvk
  • current load Icl of the motor 7 of the separator 6 pulse density in the outlet of the grinder 4 Rm and separator 6 Rcl.
  • dimensionless power factor S dimensionless power factor
  • relative speed of the grinder 4 no liquid-solid ratio W / F
  • energy consumption taking into account the motor power E
  • proportion of finished class in the outlet of the grinder 4 Sm and separator 6 Be proportion of finished class in the outlet of the grinder 4 Sm and separator 6 Be
  • circulation load C for "grinder 4 - separator 6" and their derivatives.
  • the control / regulation of the grinding plant 2 takes place by means of a control circuit of the relative speed of the grinder Vrel as a function of the optimum net power (of the dimensionless power factor S).
  • the regulation of the optimum motor power takes place in the predetermined range of the relative speed of the grinder 4 and predetermined range of the filling of the grinder 4 with Roherz.
  • the control unit 51 receives and calculates the measured quantities 17 from the raw-mass weight measuring devices Qr, water consumption of the grinder GVM, water consumption of the separator 4 Gvk, load volume of the grinder 4, power of the drive 5 of the grinder 4 Pdv, currents of the spirals 1. 2 of the separator 6 Icl, outlet density of Separator 6 Rcl, density of pulp outlet of grinder 4 Rm, sand circulation C, mass of sands in circuit "Grinder 4 - separator 6" Sp, product grain in the separator outlet for computational class Sei *, speed of the grinder 4 nm, speed of the drive 5 nd, Inverter frequency f, ore-water ratio
  • the process control is realized in the following way:
  • FIG. 15 as well as the increase in the filling volume F of the grinder when the raw-material load is increased,
  • the control unit 51 receives the measured variables 17 from the measuring devices for Roherzwith Qr, water consumption of grinder 4 GVM, water consumption of the separator 4 Gvk, load volume of the grinder 4 F, power of the drive 5 of the grinder 4 Pdv, outlet density of the separator 6 Rcl , Density of pulp outlet of Grinder 4 Rm, speed of grinder 4 nm, speed of motor 5 nd, converter frequency f,
  • the task is set for increasing the raw material throughput and reducing the energy requirement:
  • the control unit 51 receives the measured variables 17 from the measuring devices for Roherzwith Qr, water consumption of grinder 4 GVM, water consumption of the separation device 6 Gvk, loading volume of the grinder 4 F, power of the drive 5 of the grinder 4 Pdv, outlet density of the separator Rcl, grinding speed 4 nm, speed of drive 5 nd, converter frequency f,
  • the related parameters are used analogously to the above control loops.
  • the search of the zones with optimal loading of the filling volume of the grinder 4 is carried out in dependence on pulse density in the outlet of the grinder 4 Rm, related filling of the grinder 4 with ore ball load Ford (see.
  • the control unit 51 receives the measured variables 17 from the measuring devices for Roherzwith Qr, water consumption of grinder 4 GVM, load volume of the grinder 4 F, power of the drive 5 of the grinder 4 Pdv, density of the pulp outlet of the grinder 4 Rm, speed of the grinder 4 nm, speed of drive 5 nd, converter frequency f,
  • Negative value of the derivative of the filling volume Ford over the time and positive value of the derivative of the liquid-solid ratio W / F over time see FIG 11).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

L'invention concerne une installation de broyage (2) ainsi qu'un procédé pour la commande et/ou la régulation d'une installation de broyage (2), comprenant un dispositif de broyage pouvant être régulé en vitesse de rotation (4) pour le broyage d'un produit (S), un dispositif de séparation (6) pour le triage du produit broyé (S) et un séparateur (12) en aval du dispositif de séparation (6). Le procédé comprend les étapes suivantes : • a) on détermine au moins un paramètre caractéristique du fonctionnement de l'installation de broyage (2) et un deuxième paramètre; • b) on détermine la dérivée du premier paramètre (P1) par rapport au deuxième paramètre (P2); • c) on détermine le signe de la dérivée; • d) l'installation de broyage (2) est commandée et/ou régulée en fonction du signe de la dérivée.
PCT/EP2014/052132 2013-02-22 2014-02-04 Procédé pour la commande et/ou la régulation d'une installation de broyage et installation de broyage Ceased WO2014127989A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13156417.1A EP2769769A1 (fr) 2013-02-22 2013-02-22 Procédé de commande et/ou de réglage d'une installation de broyage ainsi que l'installation de broyage
EP13156417.1 2013-02-22

Publications (1)

Publication Number Publication Date
WO2014127989A1 true WO2014127989A1 (fr) 2014-08-28

Family

ID=47757402

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/052132 Ceased WO2014127989A1 (fr) 2013-02-22 2014-02-04 Procédé pour la commande et/ou la régulation d'une installation de broyage et installation de broyage

Country Status (2)

Country Link
EP (1) EP2769769A1 (fr)
WO (1) WO2014127989A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116140039A (zh) * 2023-04-23 2023-05-23 中铁工程服务有限公司 一种机制砂流量调节方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179345A (en) * 1963-07-29 1965-04-20 United States Steel Corp Method and apparatus for controlling a grinding mill
DE1940200A1 (de) * 1968-10-24 1971-02-25 Vyzk Ustav Stavebnich Hmot V B Verfahren zum selbsttaetigen Regeln einer Umlaufmuehle und Anordnung zum Ausfuehren dieses Verfahrens
DE3012653A1 (de) * 1980-04-01 1981-10-08 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und vorrichtung zur anpassung der von einer mahltrocknungsanlage insbesondere fuer brennbares gut erzeugten menge von fertiggut an die entnahmemenge eines verbrauchers
WO2006117017A1 (fr) * 2005-04-28 2006-11-09 Akw Apparate + Verfahren Gmbh Procede et dispositif d'utilisation d'un moulin a l'eau
DE102010012620A1 (de) * 2010-03-24 2011-09-29 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Mühle
EP2412418A1 (fr) * 2010-07-27 2012-02-01 Siemens Aktiengesellschaft Procédé et dispositif destinés à la commande et/ou au réglage d'une installation de filtration

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179345A (en) * 1963-07-29 1965-04-20 United States Steel Corp Method and apparatus for controlling a grinding mill
DE1940200A1 (de) * 1968-10-24 1971-02-25 Vyzk Ustav Stavebnich Hmot V B Verfahren zum selbsttaetigen Regeln einer Umlaufmuehle und Anordnung zum Ausfuehren dieses Verfahrens
DE3012653A1 (de) * 1980-04-01 1981-10-08 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und vorrichtung zur anpassung der von einer mahltrocknungsanlage insbesondere fuer brennbares gut erzeugten menge von fertiggut an die entnahmemenge eines verbrauchers
WO2006117017A1 (fr) * 2005-04-28 2006-11-09 Akw Apparate + Verfahren Gmbh Procede et dispositif d'utilisation d'un moulin a l'eau
DE102010012620A1 (de) * 2010-03-24 2011-09-29 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Mühle
EP2412418A1 (fr) * 2010-07-27 2012-02-01 Siemens Aktiengesellschaft Procédé et dispositif destinés à la commande et/ou au réglage d'une installation de filtration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116140039A (zh) * 2023-04-23 2023-05-23 中铁工程服务有限公司 一种机制砂流量调节方法

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