EP0243682B2 - Regelung einer Rührwerksmühle - Google Patents

Regelung einer Rührwerksmühle Download PDF

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Publication number
EP0243682B2
EP0243682B2 EP87104450A EP87104450A EP0243682B2 EP 0243682 B2 EP0243682 B2 EP 0243682B2 EP 87104450 A EP87104450 A EP 87104450A EP 87104450 A EP87104450 A EP 87104450A EP 0243682 B2 EP0243682 B2 EP 0243682B2
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EP
European Patent Office
Prior art keywords
grinding
chamber
auxiliary
stock
bodies
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.)
Expired - Lifetime
Application number
EP87104450A
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German (de)
English (en)
French (fr)
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EP0243682A3 (en
EP0243682B1 (de
EP0243682A2 (de
Inventor
Norbert Dr.-Ing. Stehr
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.)
Draiswerke GmbH
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Draiswerke GmbH
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Application filed by Draiswerke GmbH filed Critical Draiswerke GmbH
Publication of EP0243682A2 publication Critical patent/EP0243682A2/de
Publication of EP0243682A3 publication Critical patent/EP0243682A3/de
Publication of EP0243682B1 publication Critical patent/EP0243682B1/de
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    • 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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • 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 control device for an agitator mill according to the preamble of patent claim 1.
  • the invention is based on the object, based on the knowledge in the publication by Stehr and Schwedes, according to which ground material processed on an agitator mill has constant fineness of fineness, if the specific energy input is kept constant, to create a regulation for an agitator mill in which one constant grind fineness is achieved under largely all operating conditions.
  • the invention is based on the further knowledge that keeping the specific energy input constant only leads to a constant fineness of the grinding material in the grinding process if the grinding aid body distribution in the grinding chamber is largely uniform.
  • the invention in its most general form therefore creates a regulation which, on the one hand, ensures that the specific energy input is kept constant and, on the other hand, that the distribution of the auxiliary grinding bodies in the grinding chamber is uniform.
  • Claim 1 also gives two alternatives of a device for detecting the distribution of the auxiliary grinding bodies over the grinding chamber.
  • the first alternative is based on the knowledge that a concentration of auxiliary grinding media in front of the regrind inlet or in front of the separating device leads to an increase in the pressure drop when flowing through the grinding chamber. It also specifies how excessive concentrations of auxiliary grinding bodies are corrected at the two ends of the grinding chamber.
  • the second alternative is based on the knowledge that the excessive concentration of auxiliary grinding media in front of the regrind inlet or in front of the separating device leads to an increase in the power introduced into this area, which is essentially converted into heat and is dissipated via an associated separate cooling circuit. A comparison of at least two separate cooling circuits assigned to the two end regions of the grinding chamber or the heat flows transmitted by them thus provides information about the distribution of the auxiliary grinding bodies in the grinding chamber.
  • the claim 2 indicates as a device for detecting the distribution of the auxiliary grinding bodies in the grinding chamber that an X-ray or ultrasound or radioactive measuring device is provided for this.
  • a sound analysis device is provided as a device for detecting the distribution of the auxiliary grinding bodies in the grinding chamber, since the frequency and strength of the noise generated in the grinding chamber depend on the respective local concentration of auxiliary grinding bodies.
  • the regrind mass flow is preferably measured directly, i.e. it is preferred not to carry out an - otherwise conventional per se - indirect measurement via the measurement of the volume flow, but rather the mass flow, i.e. the mass supplied to the grinding chamber per unit of time.
  • Appropriate measuring devices are commercially available.
  • claims 4 and 5 indicate how excessive concentrations of auxiliary grinding bodies are corrected at the two ends of the grinding chamber.
  • Claims 6 to 10 indicate which controlled variable is to be changed if a deviation from the predetermined constant value of the specific energy input into the regrind occurs. If the specific energy input can no longer be regulated constantly, the measures according to claim 11 provide a remedy.
  • control according to the invention is not limited to vertical agitator mills; it can also be used for horizontal agitator mills.
  • An excessive concentration of grinding aids can likewise occur there in front of the separating device; An excessive concentration of auxiliary grinding media at the regrind inlet is not possible there.
  • the agitator mill shown in the drawing has in the usual way a stand 1, on the top of which a projecting support arm 2 is attached, to which in turn a cylindrical grinding container 3 is attached.
  • an electric agitator motor 4 is accommodated, which is provided with a V-belt pulley 5, of which a V-belt pulley 8, which is non-rotatably connected to an agitator 7, can be driven in rotation by means of the V-belt 6.
  • the vertically arranged grinding container 3 consists of a cylindrical inner cylinder 10 which surrounds a grinding chamber 9 and at the same time forms the grinding container wall and which is also surrounded by a substantially cylindrical cooling jacket 11.
  • the lower end of the grinding chamber 9 and the cooling jacket 11 is provided by a base plate 12 which is attached to the inner cylinder 10 and the cooling jacket 11, for example by screwing.
  • a grist feed connection 13 is attached, through which ground material can be pumped into the grinding chamber 9 from below.
  • An upper cooling water inlet connector 14 and a lower cooling water outlet connector 15 are provided on the cooling jacket 11.
  • a drain port 16 for auxiliary grinding bodies is also provided.
  • the grinding container 3 has an upper annular flange 17, by means of which it is attached to a cover 18 closing the grinding chamber 9.
  • This cover 18 is attached to the underside of a support housing 19, which is attached with its upper end to the support arm 2 of the agitator mill.
  • an essential part of the agitator 7 agitator shaft 20 is overhung in the usual way in bearings 21, as is known for example from DE-A-26 29 251 (corresponding to US-A-4 129 261).
  • the agitator shaft 20 is passed through the cover 18 in a sealed manner, also known from the document mentioned.
  • the agitator 7 has, in a manner known from the publication mentioned, on the agitator shaft 20, disks 23, of which agitator rods 24 project radially as agitator tools.
  • counter-rods 25 are axially offset against the stirring rods 24.
  • a grinding material outlet nozzle 26 is provided, which is preceded by a so-called annular gap separating device 27 by means of which the auxiliary grinding bodies 28 are retained in the grinding chamber 9.
  • Such a separation device 27 is also known from the mentioned publication.
  • the agitator 7 can be cooled.
  • a cooling water connection 29 and a cooling water outlet 30 are provided in a known manner at the end of the agitator shaft 20 assigned to the V-belt pulley 8.
  • the base plate 12 can also be designed to be cool, that is to say hollow, and can be provided with a cooling water inflow 31 and a cooling water outflow 32.
  • the detailed structure of the agitator mill is of no importance for the invention; So any kind of stirring tools can be used.
  • the cover 18 can also be designed to be coolable. Likewise, the specific design of the separating device is not important in this context.
  • the grinding chamber 9 is filled 50 to 90% with auxiliary grinding bodies 28 which have a diameter in the range from 0.3 to 10 mm.
  • a first circuit diagram is explained below with reference to FIG. 2.
  • Solid lines are generally drawn with solid lines, while dashed lines show control lines which lead from a central computer 33 to different locations where an operation controlled by the computer is to be triggered.
  • the power supply to the agitator motor 4 takes place via a frequency converter 34 controlled by the computer 33, so that sensitive speed control of the motor 4 and thus of the agitator 7 is possible.
  • the power consumption of the agitator motor 4 is recorded at a measuring point 35.
  • code letters are attached, which have the following meaning for all measuring points still to be mentioned:
  • the millbase is fed in by means of a millbase pump 36 via a millbase feed line 37 to the millbase feed pipe 13 of the grinding container 3.
  • the pump 36 is driven by an electric pump motor 38, the power supply of which is provided by a frequency converter 39, so that the speed of the pump motor 38 and thus the delivery rate of the pump 36 can be controlled very precisely.
  • This frequency converter is also controlled by the computer 33.
  • the pump motor 38 is assigned a measuring point 40 for detecting the electrical power consumed. Furthermore, a measuring point 41 is assigned for the detection of the pump motor or pump speed
  • the regrind feed line 37 there are also a measuring point 42 for detecting the temperature of the material to be supplied, a measuring point 43 for detecting the regrind mass flow conveyed by the regrind pump and a measuring point 44 for detecting the regrind pressure in front of or at the entrance the grinding room 9.
  • a measuring point 45 is assigned to the grist outlet port 26 for detecting the temperature of the emerging ground grist.
  • the agitator shaft 20 is assigned a measuring point 46 for detecting the speed of the agitator shaft 20.
  • the cooling water supply takes place via a central cooling water line 47, in which a shut-off valve 48 which can be controlled by the computer 33 is arranged and to which a proportional valve 49 which is also controlled by the computer 33 is arranged, the shut-off behavior of which is therefore proportional to the degree of opening or closing.
  • a shut-off valve 48 which can be controlled by the computer 33 is arranged and to which a proportional valve 49 which is also controlled by the computer 33 is arranged, the shut-off behavior of which is therefore proportional to the degree of opening or closing.
  • Such commercially available valves are particularly well suited for volume flow control, in the present case for cooling water flow control.
  • a measuring point 52 for detecting the cooling water flow temperature and a measuring point 53 for detecting the volume flow of the cooling water flow are arranged in line 47.
  • the cooling water flowing through the valve 49 and the measuring points 52, 53 is divided into a plurality of cooling water supply branch lines 54, 55, 56.
  • the branch line 54 leads to the cooling water connection 29 Agitator shaft 20, the branch line 55 leads to the cooling water inlet connection 14 of the cooling jacket 11 and the branch line 56 leads to the cooling water inflow 31 of the bottom 12 of the grinding container 3.
  • the return cooling water coming from the stirring shaft flows through a cooling water return partial line 57 to a cooling water return -Collecting line 58.
  • the distribution of the cooling water supply to the three branch lines 54, 55, 56 is carried out by means of manually adjustable valves 62, 63, 64 in these branch lines 54, 55, 56.
  • proportional valves controlled by the computer can of course also be provided, so that an individual control of the cooling water partial volume flows is possible.
  • a device 66 for supplying grinding auxiliary bodies 28 is also provided, which can also be controlled by the computer 33.
  • Such devices are known, for example, from DE-C-20 51 003.
  • the supply of grinding auxiliary bodies 28 by means of this device 66 takes place in the regrind feed line 37 immediately before the regrind supply connection 13.
  • the inner cylinder 10 and the cooling jacket 11 form a cooling space 11 'which extends essentially over the full axial length of the grinding chamber 9, in the embodiment according to FIG. 3 this cooling space is approximately in the axial center dividing a partition 67 so that two partial cooling spaces 11'a and 11'b are formed.
  • the one partial cooling space 11'a is assigned to the partial grinding space 9a, which adjoins the grinding material feed connector 13.
  • the other partial cooling space 11'b is assigned to the partial grinding space 9b, which is located in front of the separating device 27, that is to say in front of the grinding material outlet nozzle 26.
  • the same reference numerals are used as in FIG. 2, and a renewed description is dispensed with.
  • Corresponding cooling water pre-branch lines 54a and 54b are provided for supplying the two partial cooling rooms 11'a and 11'b, which branch off from the cooling water supply line 47.
  • Manually adjustable valves 63a and 63b are also provided in both branch lines 54a and 54b.
  • proportional valves controlled by the computer can be provided instead of the manually adjustable valves 63a and 63b.
  • Cooling water return partial lines 59a and 59b lead from the partial cooling rooms 11'a and 11'b to the cooling water return collecting line 58.
  • measuring points 68a and 68b for measuring the cooling water volume flow, ie for measuring the amount of cooling water per unit time in the respective branch line 54a and 54b.
  • Measuring points 69a and 69b for measuring the temperature of the corresponding return cooling water are arranged in the two cooling water return sub-lines 59a and 59b.
  • volume flow and outlet temperature of the cooling water in the two partial cooling rooms 11'a and 11'b can be determined, which are assigned to the lower grinding chamber half 9a and the upper grinding chamber half 9b.
  • the lower grinding chamber half 9a can also be assigned, as a partial cooling chamber, the coolable base plate 12 with a corresponding cooling water supply provided with measuring points in the manner described.
  • the mode of operation is as follows:
  • the basic requirement is that the specific energy input into the regrind, i.e. the quotient of the power introduced into the millbase by the agitator 7 and the mass flow of the millbase, i.e. the regrind mass fed to the grinding chamber 9 per unit of time, taking into account an allowable deviation, should be kept constant.
  • the value of the specific energy input for the specific grinding case is determined empirically in a laboratory or pilot plant under similar conditions on a reduced scale.
  • Such an agitator mill for determining such a value should therefore have a similarly designed grinding container and a similarly permitted agitator, including similar agitating tools.
  • Control variables for the specific energy input are, on the one hand, the power input into the ground material in the grinding chamber 9 and the ground material mass flow.
  • the manipulated variables for this are in turn the power consumption of the agitator motor 4, namely the active power consumption minus an idle power of the motor 4 and agitator mill to be empirically recorded and stored in the computer 32 (without filling of the grinding aid body).
  • the speed of the agitator 7 and / or the degree of filling with which the grinding chamber 9 is filled with grinding auxiliary bodies 28 serves as a manipulated variable for the power input into the process space.
  • the speed of the Agitator 7 is set via the frequency converter 34.
  • the degree of filling of the grinding media is changed by the device 66 for supplying auxiliary grinding media 28, both of which can be controlled by the computer 33.
  • An essential overriding variable is the target temperature of the millbase at the outlet 26. If the maximum permissible millbase temperature is exceeded, damage to the millbase can occur. For example, the desired coloristic properties can be impaired, dangerous solvent evaporation can occur, and chemical additives such as dispersants and stabilizers can be thermally degraded. For this reason, the regulation of the power consumption and / or of the ground material mass flow to keep the mass-specific energy supply constant can only be changed in each case taking into account a maximum permissible temperature of the ground material, which is recorded at the measuring point 45. This maximum permissible temperature is one permissible temperature deviation above the target temperature.
  • the manipulated variable for controlling a constant regrind outlet temperature is the volume flow of the cooling water. This is set in accordance with the ground material outlet temperature measured at the measuring point 45 - controlled by the computer 33 - by means of a position of the proportional valve 49.
  • the division into the individual branch lines 54, 55, 56 takes place via a manual basic setting of the valves 62, 63, 64. If the valve 49 is already fully open, a reduction in the regrind outlet temperature can only be achieved by reducing the power input via the Agitator 7 can be achieved with a corresponding reduction in the ground material mass flow.
  • the speed of the agitator 7 can be regulated to change the power input into the regrind within a speed control range around the target speed.
  • This speed control range is, for example, in a range of 10% around the target speed.
  • the actual speed of the agitator 7 is passed from the measuring point 46 to the computer 33.
  • the ground material mass flow is limited by a maximum power consumption and a maximum speed of the pump motor 38 and by a maximum permissible pressure.
  • the power consumption is recorded by the measuring point 40 and sent to the computer. Since the speed of the pump motor 38 or the regrind pump 36 detected at the measuring point 41 gives only an indirect indication of the regrind mass flow and since excessive back pressure, air inclusions and other interferences can impair the delivery of the regrind pump 36, the actual mass flow at the measuring point 43 is recorded and transferred to the computer.
  • a uniform distribution of the grinding media in the grinding chamber 9 is detected by detecting the grinding material pressure at the measuring point 44 directly in front of the grinding chamber. Since the ground material behind the separating device 27 is subject to atmospheric pressure, the ground material pressure detected at the measuring point 44 reflects the pressure loss in the grinding chamber 9. With a uniform distribution of the auxiliary grinding bodies 28 in the grinding chamber, a target material pressure is given. Exceeding this target pressure beyond a permissible deviation indicates that an excessive grinding media concentration has occurred either at the grinding material inlet, that is to say at the bottom of the grinding chamber 9, or in the region of the grinding material outlet in front of the separating device 27.
  • a uniform grinding media distribution in the grinding chamber 9 is present when the forces acting on the auxiliary grinding media 28, namely the force of gravity, the buoyancy and flow forces, are in equilibrium. If gravity predominates, there will be an excessive concentration of grinding media at the bottom of the grinding chamber. If the buoyancy and flow forces predominate, excessive concentration occurs in front of the separator. In both cases there is an increased pressure drop in the grinding chamber, i.e. the grist pressure detected at measuring point 44 increases. Furthermore, the power loss which is merely converted into grinding power for stirring the concentrated grinding auxiliary bodies 28, i.e. An excessive concentration of the auxiliary grinding bodies 28 in the region of the grinding material inlet or in front of the separating device 27 leads to increased heating of the grinding material and to greatly increased wear of the auxiliary grinding bodies 28, the stirring tools and the grinding chamber boundary walls.
  • a statement on the question of whether the cause of a pressure increase is a concentration of auxiliary grinding bodies 28 at the bottom of the grinding chamber 9 or in front of the separating device 27 can essentially be derived from the “history”) of the pressure increase. If with an increase in the regrind mass flow by a corresponding increase in the speed of the regrind pump 36, the regrind pressure at the measuring point 44 increases, then this is an indication that an excessive concentration of auxiliary grinding bodies 28 has occurred in front of the separating device 27 while a decrease in pressure indicates that the auxiliary grinding bodies 28 are excessively concentrated in the region of the regrind inlet, the flow forces acting on the auxiliary grinding bodies 28 being increased by increasing the volume flow, with the consequence that the distribution is evened out. On the other hand, if - as explained - there is an excessive concentration upstream of the separating device 27, the ground material mass flow must be reduced will.
  • the specific energy input by the agitator 7 into the ground material located in the grinding chamber 9 can no longer be kept constant when the two determining variables have reached their corresponding extreme value. If the ground material mass flow has already been reduced to a minimum and the speed of the agitator 7 has been increased to the maximum permissible value, then the refill of the grinding chamber 9 with auxiliary grinding bodies 28 is initiated by the computer 33 via the device 66. At the same time, the speed is reduced.
  • the heating of the material to be ground is detected in the region of an excessive concentration of auxiliary grinding bodies 28.
  • the heating of the cooling water in the partial cooling space 11'a and on the other hand in the partial cooling space 11'b is detected, specifically by detecting the cooling water flow temperature at the measuring point 52 and by detecting the cooling water return temperature at the measuring points 69a and 69b.
  • the heat absorbed in the partial cooling chamber 11a on the one hand and the heat absorbed in the partial cooling chamber 11 on the other hand can be determined in the computer 33 in a simple manner.
  • FIGS. 4, 5 and 6, 7 are understandable in themselves, the flow diagram according to FIGS. 4, 5 regulating the grinding media distribution via the detection of the grinding stock pressure in front of the grinding chamber 6 and 7 shows the control of the grinding media distribution via the detection of the heat flows Qu and Qo in the lower and upper parts 9a and 9b of the grinding chamber 9. Otherwise the regulation schemes are the same. They describe fully automatic controls in accordance with the invention.
  • the rhombuses in FIGS. 4 to 6 indicate the comparison operations to be carried out by the computer, which are carried out with the measurement data which are passed from the individual measurement points to the computer 33.
  • the measures indicated in rectangles indicate which manipulated variable is changed by the computer with appropriate control of the assigned actuator if one or more conditions (indicated in rhombuses) are fulfilled.
  • the pressure and the temperature are checked with regard to the maximum permissible values after the start and an emergency shutdown (EMERGENCY STOP) is carried out when the maximum permissible value is reached. Subsequently, further temperature and pressure conditions are queried and the corresponding measures described above are taken in the absence of any. If the pressure and temperature of the material to be ground are in the range of the permissible deviation, the actual specific energy input is checked, with regard to the permissible deviation. Depending on whether there is a deviation or not, the further queries or measures specified in FIGS. 5 and 6 then take place.
  • EMERGENCY STOP emergency shutdown

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP87104450A 1986-05-02 1987-03-25 Regelung einer Rührwerksmühle Expired - Lifetime EP0243682B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614980 1986-05-02
DE3614980A DE3614980C1 (de) 1986-05-02 1986-05-02 Regelungseinrichtung fuer eine Ruehrwerksmuehle

Publications (4)

Publication Number Publication Date
EP0243682A2 EP0243682A2 (de) 1987-11-04
EP0243682A3 EP0243682A3 (en) 1988-08-17
EP0243682B1 EP0243682B1 (de) 1990-01-03
EP0243682B2 true EP0243682B2 (de) 1994-11-02

Family

ID=6300080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104450A Expired - Lifetime EP0243682B2 (de) 1986-05-02 1987-03-25 Regelung einer Rührwerksmühle

Country Status (4)

Country Link
US (1) US4848676A (ko)
EP (1) EP0243682B2 (ko)
JP (1) JPS6323753A (ko)
DE (2) DE3614980C1 (ko)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730426A1 (de) * 1987-09-10 1989-03-23 Netzsch Erich Holding Verfahren zum regeln einer ruehrwerksmuehle
AU619018B2 (en) * 1988-06-10 1992-01-16 Kubota Ltd. Method and apparatus for grinding and pulverization
DE3920273A1 (de) * 1989-06-21 1991-01-03 Hermann Getzmann Verfahren und vorrichtung zur regelung der drehzahl bei ruehrwerkskugelmuehlen
US5024387A (en) * 1989-07-25 1991-06-18 E. I. Du Pont De Nemours And Company On line control method to determine media fluidization in a media mill
ES2030618A6 (es) * 1990-10-31 1992-11-01 Oliver & Battle Sa Molino para triturar y desaglomerar solidos predispersados en liquidos.
DE4432153A1 (de) * 1994-09-09 1996-03-14 Evv Vermoegensverwaltungs Gmbh Verfahren und Vorrichtung zum kontinuierlichen autogenen Mahlen eines fließfähigen Behandlungsguts
WO2000072973A1 (en) 1999-06-01 2000-12-07 Elan Pharma International Ltd. Small-scale mill and method thereof
DE10011579B4 (de) 2000-03-09 2007-06-06 BüHLER GMBH Rührwerksmühle
PT1313564E (pt) 2000-04-26 2010-01-11 Elan Pharma Int Ltd Aparelho para moagem sanitária por via húmida
CA2451161A1 (en) * 2001-06-22 2003-01-03 Elan Pharma International, Ltd. Method for high through put screening using a small scale mill or microfluidics
AU2003297151A1 (en) * 2002-12-17 2004-07-22 Elan Pharma International Ltd. Milling microgram quantities of nanoparticulate candidate compounds
JP2006255563A (ja) * 2005-03-16 2006-09-28 Toho Gas Co Ltd 粉砕機
US7571871B2 (en) * 2005-11-04 2009-08-11 Rutgers, The State University Of New Jersey Uniform shear application system and methods relating thereto
EP2377405B1 (de) 2010-04-13 2013-06-05 Albert Handtmann Maschinenfabrik GmbH & Co. KG Vorrichtung und Verfahren zum Herstellen und Abfüllen von Feinbrät, insbesondere einer Emulsion
JP5931714B2 (ja) * 2012-12-27 2016-06-08 株式会社アーステクニカ 粉砕機
EP3799960A1 (de) * 2019-10-01 2021-04-07 Bühler AG Rührwerksmühle
CN115518764A (zh) * 2022-10-12 2022-12-27 深圳市尚水智能设备有限公司 一种立式研磨机的进料控制方法及立式研磨机
CN115591634B (zh) * 2022-10-12 2023-11-03 深圳市尚水智能股份有限公司 一种立式介质研磨机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2629251C2 (de) * 1976-06-30 1987-03-19 Draiswerke Gmbh, 6800 Mannheim Rührwerksmühle
AT367657B (de) * 1978-08-24 1982-07-26 Buehler Ag Geb Ruehrwerkskugelmuehle-regelung
DE3136323A1 (de) * 1981-09-12 1983-03-31 Boehringer Mannheim Gmbh, 6800 Mannheim Verfahren zum betreiben einer kugelmuehle und entsprechende kugelmuehle
EP0109157A3 (en) * 1982-10-15 1986-03-05 Morehouse Industries, Inc. Automated sandmill control system
DE3245825C2 (de) * 1982-12-10 1994-01-27 Buehler Ag Geb Rührwerksmühle

Also Published As

Publication number Publication date
DE3761288D1 (de) 1990-02-08
JPH0418900B2 (ko) 1992-03-30
US4848676A (en) 1989-07-18
EP0243682A3 (en) 1988-08-17
DE3614980C1 (de) 1993-05-27
EP0243682B1 (de) 1990-01-03
JPS6323753A (ja) 1988-02-01
EP0243682A2 (de) 1987-11-04

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