EP3269453A1 - Verfahren zum anfahren eines mahlrohrs - Google Patents

Verfahren zum anfahren eines mahlrohrs Download PDF

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Publication number
EP3269453A1
EP3269453A1 EP16179745.1A EP16179745A EP3269453A1 EP 3269453 A1 EP3269453 A1 EP 3269453A1 EP 16179745 A EP16179745 A EP 16179745A EP 3269453 A1 EP3269453 A1 EP 3269453A1
Authority
EP
European Patent Office
Prior art keywords
torque
grinding
tube
rotation
grinding tube
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.)
Withdrawn
Application number
EP16179745.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Adem Karadeniz
Stefan Smits
Kurt Tischler
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Priority to EP16179745.1A priority Critical patent/EP3269453A1/de
Priority to PCT/EP2017/062347 priority patent/WO2018010880A1/de
Priority to BR112019000574-9A priority patent/BR112019000574A2/pt
Priority to CN201780043617.3A priority patent/CN109562388B/zh
Priority to US16/316,514 priority patent/US20230182146A1/en
Priority to CA3030596A priority patent/CA3030596C/en
Priority to PE2019000051A priority patent/PE20190272A1/es
Priority to RU2019102599A priority patent/RU2718763C1/ru
Priority to AU2017295379A priority patent/AU2017295379B2/en
Publication of EP3269453A1 publication Critical patent/EP3269453A1/de
Priority to ZA201900175A priority patent/ZA201900175B/en
Priority to CL2019000097A priority patent/CL2019000097A1/es
Withdrawn legal-status Critical Current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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/24—Driving 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 invention relates to a method for starting a grinding tube with an associated drive device, wherein a grinding mode and a charge release mode can be set during operation of the grinding tube.
  • the invention further relates to a control device, a drive device and a tube mill.
  • Tube mills are preferably used for grinding materials such as ore. It is not uncommon for the operation of a tube mill to be interrupted for an extended period of time and the tube mill to stand still. This happens, for example, for maintenance reasons. During standstill of the tube mill, the material located in the mill tube of the tube mill can consolidate and stick to the inner wall of the mill tube. Such adhered, solidified, adhering to the inner wall of the milling tube material is referred to as a stuck charge or as a "frozen charge". If the tube mill is put back into operation after a long standstill, there is a risk that the stuck-on load will detach itself from the inner wall at a great height, crash and cause considerable damage to the tube mill when it is subsequently impacted on the grinding tube.
  • the torque required when starting the tube mill can be continuously monitored and the maximum value of the course is stored.
  • the set rotation angle of the monitor e.g. 70 °
  • the current torque is compared with the stored peak value for a subsequent time stamp. If the torque in the monitoring window is greater than 95% of the stored maximum value, it is concluded that the charge has been baked (at which the torque continuously increases up to a 90 ° angle of rotation) and the tube mill is switched off.
  • the invention has for its object to ensure a particularly reliable monitoring of the state of the material contained in a milling tube of a tube mill material.
  • control device for the drive device of a grinding tube for carrying out the method.
  • a drive device for a grinding tube comprising such a control device.
  • the object is finally achieved according to the invention by a tube mill comprising a grinding tube and such a drive device.
  • grinding mode is understood to be the normal operation of a tube mill, in which the grinding blank is rotated with respect to comminution or grinding of the charge.
  • charge release mode is meant an operational condition of the tube mill in which, when a stuck charge is detected, measures are taken to remove the sticking charge from the inner wall of the grinding tube.
  • measures may vary according to the automated modes of operation described in the EP 1 735 099 B1 and in EP 2 525 914 B1 judge.
  • merely turning off the rotation of the grinding tube may be provided with a view to manually removing the adhered charge from the inner wall.
  • the invention is based on the consideration of checking, by detecting the torque of the drive device at two different angles of rotation, whether the charge of the grinding tube is a "sliding" or adhering material.
  • the detected torque here is the drive torque (or alternatively the load torque) of the grinding tube.
  • the torque of the drive device steadily increases, as long as the charge adheres to the inner wall of the grinding tube.
  • the torque increase with time or with the increasing angle of rotation is smaller than in the case of the total frozen charge.
  • the torque is detected at two angles of rotation when starting the grinding tube according to the invention. At the first, smaller angle of rotation, comparatively little of the charge has slipped down when starting the grinding tube. Based on this first actual torque, it is calculated which torque is to be expected at the second, higher angle of rotation if the conditions in the grinding tube no longer change. The actual actual torque for the second angle of rotation is then also detected, it is usually below the extrapolated target value, since usually with increasing height of the charge during the further rotation of the grinding tube dissolves more material from the inner wall.
  • the threshold range is used, which provides information about how far the actual torque deviates from the setpoint torque. If the second actual torque is well below the extrapolated target torque, outside the threshold range, it can be assumed that the charge has largely or even completely detached from the inner wall of the grinding tube and it can continue the normal grinding operation of the tube mill. However, if the second actual torque is within the threshold range, this means that the material still largely adheres to the inner wall of the milling tube. Therefore, the charge release mode is set so that the charge is released from the wall before the milling tube is further rotated.
  • a significant advantage of the proposed method is that the method is independent of a maximum value of the course of the torque.
  • the cost of implementing the method is minimal, since in general all the required parameters are available anyway, they are only implemented in another software function in the control of the pipe waste.
  • the process is independent of the direction of rotation.
  • the sine of the first rotation angle and the sine of the second rotation angle are used to calculate the desired torque, in particular the ratio of the sine of the first rotation angle to the sine of the second rotation angle. This is particularly advantageous since, when the grinding material is firmly baked, the torque substantially increases in accordance with a sine of the angle of rotation. Calculating the desired torque in the second rotation angle from the first rotation angle on the basis of a sine-based extrapolation thus provides the most accurate result for the desired torque.
  • a quotient is formed from the second actual torque and the desired torque.
  • a quotient offers a particularly simple way of establishing a relation between the two values in order to investigate how these relate to each other and how large the deviation from each other is.
  • the threshold range is defined by a value which is indicated in particular as a percentage or a rational number.
  • the value forms the numerical limit for the ratio of the desired torque and the second actual torque to each other. In the event that is used in the evaluation of the actual torque compared to the target torque with a quotient, this quotient is always less than 1, if the actual torque is in the counter and it is nominal torque in the denominator. In the opposite case, if the quotient is the nominal torque in the numerator and the actual torque is in the denominator, the quotient is always greater than 1. Accordingly, the threshold range is selected.
  • the threshold range is defined as a deviation of the second actual torque from the target torque by 15%, in particular by 10%, in particular by 5%.
  • the threshold range is selected such that the charge release mode is initiated only when the deviation of the second actual torque from the target torque are minimal, which is an indication that during rotation the grinding tube between the first angle of rotation and the second angle of rotation has hardly solved material from the inner wall of the grinding tube.
  • the first and the second rotation angle are below 90 °, in particular below 70 °.
  • the charge release mode is initiated at a rotation angle of about 70 °.
  • the above-described review is carried out in an angular range below 70 °.
  • FIG. 1 is symbolically shown a grinding pipe 2 of a tube mill, not shown here in detail.
  • the grinding tube 2 is associated with a drive device 3 with a control device 4, which controls, among other things, the start of the grinding tube 2.
  • the grinding tube 2 is loaded with a regrind 6, in particular ore, which is also referred to as a charge.
  • the grinding tube 2 can be operated both in a grinding mode and in a charge-dissolving mode.
  • the milling mode represents the normal operation of a tube mill, in which the grinding blank is rotated with a view to crushing or grinding the load.
  • the charge dissolution mode is the operational state of the tube mill where, when a stuck charge is detected, measures are taken to remove the sticking charge from the inner wall of the grinding tube.
  • FIG. 1 a total of four states of the charge 6 of the grinding tube 2 are shown depending on the angle of rotation.
  • Z 1 represents a still state at 0 °, in which the charge 6 is uniformly distributed on the bottom of the grinding tube 2.
  • Z 4 represents the position of the firmly baked charge at an angle of rotation of approximately 70 °.
  • Z 2 and Z 3 represent the firmly baked charge 6 at two further rotation angles ⁇ 1 , ⁇ 2 between 0 ° and 70 °.
  • the operation of the tube mill is taken and the grinding tube 2 approached in the direction of rotation 10 by being rotated about a central axis A.
  • a first rotation angle ⁇ 1 which is smaller than 90 °, for example at 45 °
  • a torque T of the drive device 3 is measured. This point is in FIG. 1 denoted by M1.
  • a second angle of rotation ⁇ 2 for example 60 °
  • the torque T is measured again at the point M2.
  • the measurements can also take place at other angles of rotation D between 0 ° and 90 °, only at least two measured values at two different angles of rotation are required.
  • FIG. 2 The evaluation of the measurements in the measuring points M1 and M2 is in FIG. 2 shown graphically.
  • the torque T of the drive device 3 is plotted against the angle of rotation D.
  • V 1 designates the increase in the torque T for a stuck charge.
  • V 2 is the actual course of the torque T when starting the tube mill.
  • M denotes the maximum torque occurring.
  • the torque T in the measuring points M1 and M2 is determined at ⁇ 1 or ⁇ 2 .
  • the torque T increases largely in accordance with a sine of the angle of rotation D, as can be seen from the course of V 1 . Therefore, from the torque T 1 to the first rotation angle (measurement M1) on the relationship sin ⁇ 1 / are ⁇ 2 the theoretical setpoint torque T 2setpoint is calculated at time M2 at rotation angle ⁇ 2 .
  • the actual torque T 2IST at the measuring point M2 at ⁇ 2 is additionally measured and compared with T 2SOLL by using a threshold range 8.
  • the threshold range is defined as 10%, ie it is examined whether T 2IST deviates more than 10% from T 2SOLL . If T 2IST is more than 10% below T 2SOLL or equal to T 2SOLL , it can be assumed that the material has detached from the inner wall of the grinding tube 2 and the tube mill continues to operate undisturbed. Otherwise, for example, the charge release mode is set, in particular, the tube mill is turned off or it is caused a controlled shaking or shaking of the grinding tube 2 via an adjustment of the drive torque.
  • the threshold range 8 is stored in the controller 4 or this is specified case-related as needed. For the evaluation, in particular the quotient of T 2IST and T 2SOLL is formed and this is compared with the threshold range 8. In the above embodiment in which the deviation limit is defined at 10%, the condition for initiating the charge-dissipation mode is satisfied when T 2 IS ⁇ T 2 SHOULD ⁇ 0 . 9th
  • T 2 SHOULD T 1 sin ⁇ 1 / sin ⁇ 2 .
  • T 2 IS ⁇ T 1 sin ⁇ 1 / are ⁇ 2 ⁇ 0 . 9th
  • T 2IST is equal to or greater than 10% of T 2SOLL , then the normal milling mode continues.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP16179745.1A 2016-07-15 2016-07-15 Verfahren zum anfahren eines mahlrohrs Withdrawn EP3269453A1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP16179745.1A EP3269453A1 (de) 2016-07-15 2016-07-15 Verfahren zum anfahren eines mahlrohrs
CA3030596A CA3030596C (en) 2016-07-15 2017-05-23 Method for starting a grinding tube
BR112019000574-9A BR112019000574A2 (pt) 2016-07-15 2017-05-23 método para iniciar um tubo de moagem, dispositivos de controle e de acionamento, e, triturador de tubo.
CN201780043617.3A CN109562388B (zh) 2016-07-15 2017-05-23 用于启动研磨管的方法
US16/316,514 US20230182146A1 (en) 2016-07-15 2017-05-23 Method for Starting a Grinding Tube
PCT/EP2017/062347 WO2018010880A1 (de) 2016-07-15 2017-05-23 Verfahren zum anfahren eines mahlrohrs
PE2019000051A PE20190272A1 (es) 2016-07-15 2017-05-23 Proceso para poner en funcionamiento un tubo de molienda
RU2019102599A RU2718763C1 (ru) 2016-07-15 2017-05-23 Способ запуска размалывающей трубы
AU2017295379A AU2017295379B2 (en) 2016-07-15 2017-05-23 Method for starting a grinding tube
ZA201900175A ZA201900175B (en) 2016-07-15 2019-01-10 Method for starting a grinding tube
CL2019000097A CL2019000097A1 (es) 2016-07-15 2019-01-11 Proceso para poner en funcionamiento un tubo de molienda.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16179745.1A EP3269453A1 (de) 2016-07-15 2016-07-15 Verfahren zum anfahren eines mahlrohrs

Publications (1)

Publication Number Publication Date
EP3269453A1 true EP3269453A1 (de) 2018-01-17

Family

ID=56413592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16179745.1A Withdrawn EP3269453A1 (de) 2016-07-15 2016-07-15 Verfahren zum anfahren eines mahlrohrs

Country Status (11)

Country Link
US (1) US20230182146A1 (zh)
EP (1) EP3269453A1 (zh)
CN (1) CN109562388B (zh)
AU (1) AU2017295379B2 (zh)
BR (1) BR112019000574A2 (zh)
CA (1) CA3030596C (zh)
CL (1) CL2019000097A1 (zh)
PE (1) PE20190272A1 (zh)
RU (1) RU2718763C1 (zh)
WO (1) WO2018010880A1 (zh)
ZA (1) ZA201900175B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023188150A1 (ja) * 2022-03-30 2023-10-05 東芝三菱電機産業システム株式会社 検出装置および検出システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1188807A (en) * 1982-06-25 1985-06-11 Rhual L. Guerguerian Mill load condition detector
DE3528409A1 (de) 1985-08-07 1987-02-12 Siemens Ag Verfahren und vorrichtung zum rberwachen des lastzustandes einer rotierenden mechanik, die von einer feldorientierten drehfeldmaschine angetrieben ist
EP1735099B1 (de) 2004-03-25 2011-04-27 Siemens Aktiengesellschaft Verfahren, steuervorrichtung und antriebsvorrichtung zum lösen einer festgeklebten ladung von der innenwand eines mahlrohrs
EP2525914B1 (en) 2010-01-21 2013-05-29 ABB Schweiz AG Method and apparatus for detaching frozen charge from a tube mill

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757051A1 (de) * 1977-12-21 1979-06-28 Siemens Ag Anordnung zum anlassen eines drehstrom-schleifringlaeufermotors fuer den antrieb des hub- oder fahrwerkes eines kranes
AUPQ152499A0 (en) * 1999-07-09 1999-08-05 Commonwealth Scientific And Industrial Research Organisation A system for monitoring acoustic emissions from a moving machine
DE102011004416B4 (de) * 2011-02-18 2017-07-20 Siemens Aktiengesellschaft Antriebssystem für eine Kugelmühle und Verfahren zum Betreiben einer Kugelmühle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1188807A (en) * 1982-06-25 1985-06-11 Rhual L. Guerguerian Mill load condition detector
DE3528409A1 (de) 1985-08-07 1987-02-12 Siemens Ag Verfahren und vorrichtung zum rberwachen des lastzustandes einer rotierenden mechanik, die von einer feldorientierten drehfeldmaschine angetrieben ist
EP1735099B1 (de) 2004-03-25 2011-04-27 Siemens Aktiengesellschaft Verfahren, steuervorrichtung und antriebsvorrichtung zum lösen einer festgeklebten ladung von der innenwand eines mahlrohrs
EP2525914B1 (en) 2010-01-21 2013-05-29 ABB Schweiz AG Method and apparatus for detaching frozen charge from a tube mill

Also Published As

Publication number Publication date
RU2718763C1 (ru) 2020-04-14
AU2017295379A1 (en) 2019-01-24
WO2018010880A1 (de) 2018-01-18
CN109562388A (zh) 2019-04-02
PE20190272A1 (es) 2019-02-25
BR112019000574A2 (pt) 2019-04-24
US20230182146A1 (en) 2023-06-15
CL2019000097A1 (es) 2019-06-14
AU2017295379B2 (en) 2019-08-01
CN109562388B (zh) 2020-12-08
CA3030596A1 (en) 2018-01-18
CA3030596C (en) 2021-01-26
ZA201900175B (en) 2019-10-30

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