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EP3448575B1 - Broyeur tubulaire et procédé associé pour déterminer le poids de matériau - Google Patents

Broyeur tubulaire et procédé associé pour déterminer le poids de matériau Download PDF

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Publication number
EP3448575B1
EP3448575B1 EP16726213.8A EP16726213A EP3448575B1 EP 3448575 B1 EP3448575 B1 EP 3448575B1 EP 16726213 A EP16726213 A EP 16726213A EP 3448575 B1 EP3448575 B1 EP 3448575B1
Authority
EP
European Patent Office
Prior art keywords
drum
strain sensor
grinding mill
chamber
data
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.)
Active
Application number
EP16726213.8A
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German (de)
English (en)
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EP3448575A1 (fr
Inventor
Salih GULSEN
Seniz ERTUGRUL
Yasar Kaya ULUER
Adnan Can
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.)
Dal Elektrik Ve Otomasyon Sistemleri San Tic AS
Original Assignee
Dal Elektrik Ve Otomasyon Sistemleri San Tic AS
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.)
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Application filed by Dal Elektrik Ve Otomasyon Sistemleri San Tic AS filed Critical Dal Elektrik Ve Otomasyon Sistemleri San Tic AS
Publication of EP3448575A1 publication Critical patent/EP3448575A1/fr
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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
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling mills

Definitions

  • the present invention relates to a method and device for measurement of amount of material inside a grinding mill.
  • Comminution operations for the mineral ores may require a series of subsequent operations to be performed, e.g. pre-crushing, grinding to obtain a final product.
  • Jaw crushers, disc crushers, hammer mills or roller ball mills are used to gradually comminute ore. Milling operations require great amount of energy for example 2.2 kwh/tonne for crushing and 11.6 for grinding operations.
  • US5551639 explain a method and apparatus for crushing and fine grinding of solid particulate materials used in cement utilizing a conventional ball mill to decrease energy consumption.
  • US-3253744-A and US-6619574-B1 disclose drum mills comprising support structures with strain gauge weight sensors.
  • the object of the present invention is providing instant and accurate weight information from a grinding mill.
  • a grinding mill In order to realize the abovementioned object, a grinding mill according to claim 1 is provided.
  • the grinding mill comprises a drum wherein a plurality of balls are disposed in a freely movable manner having an inlet to feed particulate material inside the drum and an outlet to transfer fine material after grinding.
  • a strain sensor is adapted to the drum so that providing a data to determine weight information of the drum. Strain sensor will determine any weight changes on the drum by measuring deflection of the drum due to the loads, e.g. balls or the material to be grinded.
  • the strain sensor is mounted at an outer periphery of the drum. Outer periphery show the more deflection than the inner periphery therefore strain sensor can provide more accurate data based on higher deflection value.
  • the strain sensor may be attached on a mounting plate which is secured to the outer periphery of the drum.
  • Mounting plate provide modularity to easily secure the strain sensor to the drum and also in some aspects protects strain sensor, e.g. strain gauge, as a heat shield to reduce heat transfer from outer periphery to the strain sensor.
  • the strain sensor is connected to a transmitter which is transmitting the data to a receiver in data communication with a controller.
  • the data provided by the strain sensor to the transmitter is a voltage value which has a linear change while the drum is rotating.
  • the transmitter has a wireless signal module which is in communication with the receiver having a corresponding wireless module to transmit the data from drum to a remote location.
  • the remote location can be an operation room where various types of operations value for optimization of the processes are collected.
  • a power module may be connected to the strain sensor energize the strain sensor upon start of the grinding process. Power module prevents use of cable harness or any other relevant installation and simplify construction to reduce maintenance requirement.
  • the power module may comprise a regenerative power source. This could be solar panels, kinetic or thermal power generator. Considering the heat on the drum which can be as high as 70°C thermal energy generator or combination of other types can recharge power module which comprises batteries.
  • the power module may be electrically connected to the wireless signal module providing electricity to the wireless signal module during data transmission.
  • the drum may be divided into a first chamber and at least one second chamber wherein the strain sensor is having a first measurement element and a second measurement element corresponding to each of the first chamber and the second chamber to provide the data independent from each other.
  • drum can be one chamber or can be divided more than two chambers. For the latter, each one of the chambers has its own strain sensor provided at the outer periphery of the corresponding chamber.
  • the distance between the transmitter and the first measurement element or the second measurement element may be substantially equal. This provide any signal losses between two chambers during the transmission of the signal are similar to each other so that information obtained using the data from each one of the chambers is more reliable.
  • the strain sensor may be arranged on the drum at a vicinity of the center of gravity of the drum or each one of center of gravity of the first chamber or the second chamber.
  • the center of gravity has the maximum deflection on the drum which will provide more accurate measurement by the strain sensor.
  • strain sensor is aligned at the middle of the length direction.
  • number of the chambers can be more than two, for example three, and more than one strain sensor can be adapted to the each one of the chambers. Distribution of the strain sensors in each chamber can be equal. For example, if there are two strain sensors available for each one of the chambers of the drum, the angle between strain sensors will be 180°.
  • one strain sensor can be utilized for more than one chambers, e.g. two chambers.
  • the strain sensor may be mounted on a plate of the drum by means of a mounting plate having a fastening device adapted to the corresponding holes on the plate.
  • Plate can be one of the plates forming the drum which is known as liners for the grinding mills which is better understood by a reference to US3804346 .
  • invention provides also a method according to claim 9. Hence the system is ready and the drum can be loaded with the material to be grained.
  • Strain sensor term in the description cover particularly, strain gauges of any suitable type or piezosensors or similar other types of the sensors not listed in here.
  • a drum (10) of a grinding device is shown from a side view.
  • the drum (10) is rotated by an electric motor (not shown) in the longitudinal axis.
  • the drum (10) is fed intermittently with clinkers, gypsum and other additives from a feeding device via an inlet (12) providing access inside the drum (10).
  • the drum (10) is in a tube form defining an inner space which is separated to a first chamber (11) and a subsequent second chamber (13) by means of a diaphragm (20) which is a vertical wall allowing semi-grinded particles to move from the first chamber (11) to the second chamber (13).
  • a plurality of metal balls (30) are disposed inner volume of the drum (10) in a freely movable manner.
  • the first chamber (11) contain large balls (32) which have outer diameters between 90 to 60 mm.
  • Second chamber (13) contain small balls (34) have outer diameters between 40 to 20 mm. Due to the weight of the balls (30), they are accumulated at a bottom side (15) of the inner volume of the drum (10). Ground fine product is removed from an outlet (14) of the drum (10).
  • the inlet (12) and the outlet (14) are arranged at the two opposite ends of the drum (10).
  • a strain sensor (80) is mounted on the outer periphery (18) of the drum (10) by means of a mounting plate (40). In an alternative embodiment strain sensor (80) can also be directly mounted over the outer periphery (18) of the drum (10). Strain sensor (80) is comprising two separate components, namely a first measurement element (82) and a second measurement element (84). Each one of the components are known strain sensor (80) devices suitable for harsh environmental conditions.
  • a transmitter (90) is also secured on the outer periphery (18) of the drum (10).
  • a cable (86) connect the first measurement element (82) and the second measurement element (84) to the transmitter (90).
  • the cable (86) is a signal transmission cable such as a copper wire coaxial cable or an optical cable.
  • the transmitter (90) comprises a power module (94) which is a rechargeable battery such as Lithium ion type and a power generator of regenerative type, transform kinetic, solar or heat energy into the electricity to charge the battery.
  • a wireless signal module (92) is connected to an antenna (96) and the power module (94).
  • power module (94) supply 24 V electricity to the first measurement element (82) and the second measurement element (84).
  • Strain sensor (80) respond with a voltage in millivolts and amplified a voltage value up to 10 volts. Amplified voltage value of the strain sensor (80) transmitted to the wireless signal module (92).
  • a receiver (70) suitable to collect information provided with the transmitter (90) is shown.
  • the receiver (70) has a data connection to a controller (72) having a CPU.
  • Voltage value output data of a corresponding strain sensor (80) is collected by the receiver (70) by means of the wireless module (74).
  • a suitable electronic module i.e. amplifier, before transmitting the data to the receiver (70).
  • strain sensor (80) assembly to the outer periphery (18) of the drum (10) by means of a metal mounting plate (40) is shown in cross-section.
  • the cable (86) extend from one end of the strain sensor (80) to the transmitter (90).
  • the cable (86) both supply input voltage provided by the power module (94) to the strain sensor (80) and transfer output voltage back to the transmitter (90).
  • a number of plates (17) next to each other form inner liner of the drum (10) and fixed to the drum (10) by means of bolts (60).
  • Each plate (17) having the bolt (60) to mount the plate (17) to the drum (10) in a removable manner.
  • bolt (60) allow replacing the damaged plate (17) with a new one and allow maintenance.
  • Modular structure of the plates (17) make easy installation of the strain sensor (80) on a plate (17) using the same bolts (60) over the plate (17).
  • a base (44) is arranged over a plate (17) and secured on the plate (17) using the fastening elements (42) that are used to fix the plates (17).
  • the fastening elements (42) are in the form of bolts extending between the base (44) and upper side of the plate (17) partially forming outer periphery (18).
  • the base (44) is made of a metal element, i.e. steel, where the strain sensor (80) is installed.
  • the weight measurement system After mounting the strain sensor (80) at the center of gravity of each chamber (11, 13) and transmitter (90) in the middle of the chambers (11, 13) the weight measurement system needs to be calibrated before first use. Input voltage is provided by power module (94) to obtain an output voltage difference of the strain sensor (80) during rotation of the drum (10). This will provide a first data set (d0) which is output voltage value when the drum (10) is empty. In the preferred application, calibration of the measurement system can be done by providing a second data set (d2) after charge of the balls (30) inside the drum (10).
  • the balls (30) are charged inside the inner volume of the drum (10) before grinding operation. Afterwards, the drum (10) is rotated to obtain an output voltage difference for each rotation.
  • This define a calibration data as the first data set (d1) and difference between a preliminary data (d0) of empty drum (10) and the first data set (d1) can be compared with known weight value of the balls (30) so that correlation between voltage difference and weight can be calculated to complete calibration.
  • drum (10) is loaded from inlet (12) and grinded fine product is exit through the outlet (14). Amount of material inside the drum (10), i.e. in tonnes, can be calculated by instant output voltage value of the strain sensor (80).
  • System can be designed to continuous data flow from transmitter (90) to the receiver (70) so that a controller (72), e.g. a remote computer can calculate material weight amount inside the drum (10) while the grinding operation takes place. Otherwise, two way data flow between the transmitter (90) and receiver (70) can be provided to send request from the receiver (70) to transmitter (90) to obtain instant output voltage value of the strain sensor (80). In another alternative, transmitter (90) send intermittent signals, e.g. 1 per minute to the receiver (70) which is preliminary defined before the operation.
  • the first measurement element (82) and the second measurement element (84) will provide output voltage information independent from each other to the transmitter (90). Therefore, it will be possible to understand first chamber (11) and second chamber (13) material weight by calculating output voltage with corresponding calibration data obtained by comparison of each output voltage value and weight of the large balls (32) inside the first chamber (11) and small balls (34) inside the second chamber (13).
  • empty volume inside the drum (10) can also be estimated using additional information such as inner volume of the drum (10) and average density of the material and weight information.
  • REFERENCE NUMBERS 10 Drum 60 Bolt 11 First chamber 70 Receiver 12 Inlet 72 Controller 13 Second chamber 74 Wireless module 14 Outlet 80 Strain sensor 15 Bottom side 82 First measurement element 17 Plate 84 Second measurement element 18 Outer periphery 85 Mounting bolt 20 Diaphragm 86 Cable 30 Balls 90 Transmitter 32 Large balls 92 Wireless signal module 34 Small balls 94 Power module 40 Mounting plate 96 Antenna 42 Fastening element 44 Base

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Crushing And Grinding (AREA)

Claims (9)

  1. Un broyeur comprenant un tambour (10) dans lequel plusieurs balles (30) sont placées de manière librement déplaçable ayant une entrée (12) à alimenter le matériau particulaire à l'intérieur du tambour (10) et une sortie (14) à transférer le matériau fin après le broyage caractérisé en ce qu'il comprend un capteur de contrainte (80) monté à la périphérie extérieure (18) du tambour (10) de sorte que les données sont fournies pour déterminer l'information de poids du tambour (10) où le capteur de contrainte (80) est connecté au transmetteur (90) qui transmet les données au récepteur (70) en communication de données avec un contrôleur (72) et le transmetteur (90) a un module de signaux sans fil (92) qui est en communication avec le récepteur (70) ayant un module sans fil (74) correspondant à transmettre les données du tambour (10) à un endroit éloigné.
  2. Un broyeur selon la revendication 2, dans lequel le capteur de contrainte (80) est attaché sur la plaque de fixation (40) qui est fixée à la périphérie extérieure du tambour (10).
  3. Un broyeur selon l'une quelconque des revendications précédentes, dans lequel un module de puissance (94) est connecté au capteur de contrainte (80) à énergiser le capteur de contrainte (80) au moment du démarrage du processus de broyage.
  4. Un broyeur selon la revendication 4, dans lequel un module de puissance (94) comprend une source de puissance régénérative.
  5. Un broyeur selon la revendication 3 ou 4, dans lequel un module de puissance (94) est connecté électriquement au module de signaux sans fil (92) fournissant l'électricité au module de signaux sans fil (92) pendant la transmission des données.
  6. Un broyeur selon l'une quelconque des revendications précédentes, dans lequel le tambour (10) est divisé en premier compartiment (11) et au moins un deuxième compartiment (13) dans lequel le capteur de contrainte (80) a un premier élément de mesure (82) et un deuxième élément de mesure (84) correspondant à chacun du premier compartiment (11) et du deuxième compartiment (13) à fournir les données indépendantes l'un de l'autre.
  7. Un broyeur selon la revendication 6, dans le quel la distance entre le transmetteur (90) et le premier élément de mesure (82) ou le deuxième élément de mesure (84) est sensiblement égale.
  8. Un broyeur selon l'une quelconque des revendications précédentes, dans lequel le capteur de contrainte (80) est arrangé à proximité du centre de gravité du tambour (10) ou chacun des centres de gravité du premier compartiment (11) et du deuxième compartiment (13).
  9. Une méthode de mesure du poids pour un broyeur selon l'une quelconque des revendications précédentes, comprenant les étapes d'obtention d'un premier ensemble de données (d1) du capteur de contrainte (80) lorsque le tambour (10) est vide ; ensuite l'obtention du deuxième ensemble de données (d2) lorsque le tambour (10) est chargé avec les balles (30) calibrant le système de mesure basé sur le premier et deuxième ensemble des données (d1, d2).
EP16726213.8A 2016-04-28 2016-04-28 Broyeur tubulaire et procédé associé pour déterminer le poids de matériau Active EP3448575B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2016/050129 WO2017188901A1 (fr) 2016-04-28 2016-04-28 Broyeur et procédé de détermination du poids de matière pour le broyeur

Publications (2)

Publication Number Publication Date
EP3448575A1 EP3448575A1 (fr) 2019-03-06
EP3448575B1 true EP3448575B1 (fr) 2021-04-21

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Application Number Title Priority Date Filing Date
EP16726213.8A Active EP3448575B1 (fr) 2016-04-28 2016-04-28 Broyeur tubulaire et procédé associé pour déterminer le poids de matériau

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EP (1) EP3448575B1 (fr)
WO (1) WO2017188901A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253744A (en) * 1964-09-22 1966-05-31 Nordberg Manufacturing Co Electrical control system for grinding mill
US3804346A (en) 1972-09-11 1974-04-16 T Norman Liner for grinding mills
ES2064245B1 (es) 1991-12-06 1997-10-16 Standart 90 Metodo y aparato polivalente para la molienda de material solido.
FR2792224B1 (fr) * 1999-04-15 2001-06-01 Alstom Procede pour controler le niveau de remplissage en charbon d'un broyeur a boulets
AUPQ152499A0 (en) * 1999-07-09 1999-08-05 Commonwealth Scientific And Industrial Research Organisation A system for monitoring acoustic emissions from a moving machine
DE19933995A1 (de) 1999-07-20 2001-03-01 Kima Ges Fuer Echtzeitsysteme Füllstandsmessung für Kugelmühlen
CN102935398B (zh) * 2012-10-19 2014-08-06 中信重工机械股份有限公司 一种测量大型磨机筒体应力时的调零方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP3448575A1 (fr) 2019-03-06
WO2017188901A1 (fr) 2017-11-02

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