EP2676725B1 - Dispositif et procédé de mélange, notamment de dispersion - Google Patents

Dispositif et procédé de mélange, notamment de dispersion Download PDF

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Publication number
EP2676725B1
EP2676725B1 EP12172400.9A EP12172400A EP2676725B1 EP 2676725 B1 EP2676725 B1 EP 2676725B1 EP 12172400 A EP12172400 A EP 12172400A EP 2676725 B1 EP2676725 B1 EP 2676725B1
Authority
EP
European Patent Office
Prior art keywords
rotor unit
housing
process region
mixing
separating device
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.)
Not-in-force
Application number
EP12172400.9A
Other languages
German (de)
English (en)
Other versions
EP2676725A1 (fr
Inventor
Philipp Schmitt
Wendelin Kneisl
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.)
Buehler AG
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Priority to EP12172400.9A priority Critical patent/EP2676725B1/fr
Priority to PCT/EP2013/062280 priority patent/WO2013189830A1/fr
Priority to TW102121333A priority patent/TW201410317A/zh
Publication of EP2676725A1 publication Critical patent/EP2676725A1/fr
Application granted granted Critical
Publication of EP2676725B1 publication Critical patent/EP2676725B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1152—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with separate elements other than discs fixed on the discs, e.g. vanes fixed on the discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/812—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/87—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the receptacle being divided into superimposed compartments
    • 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
    • B02C17/161—Arrangements for separating milling media and ground material
    • 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
    • B02C17/163—Stirring means

Definitions

  • the present invention relates to an apparatus and a method for mixing, in particular dispersing.
  • a predetermined amount of liquid is often premixed with a predetermined amount of a powdery solid, usually pigment. Such mixtures are then further ground and dispersed in stirred mills, if necessary.
  • Exemplary industrial applications are the production of paint and varnish or the like.
  • mixing is understood as meaning the combination of substances or streams in such a way that the composition is as uniform as possible.
  • the mixing is used in particular for the preparation of dispersions, ie dispersing.
  • a dispersion is understood as meaning a heterogeneous mixture of at least two substances which do not dissolve or hardly dissolve into one another or chemically combine with one another.
  • a substance disperse phase
  • a substance is dispersed as finely as possible in another substance (dispersion medium or continuous phase), if appropriate using grinding aid bodies; In stirred mills, for example, spherical grinding aids are frequently used.
  • the present invention relates in particular to (the preparation of) suspensions - ie dispersions in which a liquid forms the continuous phase and a solid forms the disperse phase.
  • the dispersion also means the wetting of the material to be dispersed with the dispersing agent and the comminution of the substance to be dispersed (and, if appropriate, the subsequent stabilization).
  • Comminution may typically be the dissolution of agglomerates into primary particles.
  • aggregates or associates if an assembly by van der Waals forces or stronger chemical bonding types is effected
  • Generic devices for mixing two substances usually have a housing and a rotor rotating therein. By means of at least one supply line, the substances are introduced into the housing. During operation of the device, the substances are mixed by means of the rotor and then discharged from the housing.
  • the dispersing apparatus comprises a dispersing chamber, at least one stirring disk, an inlet through which the liquid with the material to be treated and the dispersion medium are sucked by the rotation of the stirring disk, an outlet, and a separator.
  • the separating device is arranged at the outlet. By means of the separator, the Mahltosêt be separated from the dispersion.
  • the separator may discharge the dispersion through the outlet, retaining the grinding aids as described.
  • a device for homogenizing and / or dispersing a flowable material is in DE 200 09 105 U1 shown.
  • the device comprises a stator and a rotor driven in rotation about an axis, the stator and the rotor having shearing and / or conveying elements.
  • the device has a shear area, where the shear and / or conveying elements run past each other during the rotation of the motor.
  • the device has at least one supply line. The supply line opens directly into the shear area.
  • the device comprises: a housing which has at least one, preferably two inlets and at least one outlet, a separating device which is arranged in the housing and with which the housing can be subdivided into a first process area and a second process area, and a rotor unit which is rotatably disposed in the housing, wherein the first process area comprises a first portion of the rotor unit, so that during operation of the device mixing of supplied by the at least one inlet materials by means of the first portion of the rotor unit in the first process area is feasible, and the second process area is disposed downstream of the first process area after the separation device and includes a second portion of the rotor unit, wherein the second portion of the rotor unit comprises an ejection means.
  • the separator comprises static and / or dynamic gaps.
  • the rotor assembly includes a rotor disk which extends through elements of the separator and forms a dynamic gap therewith.
  • the second process area and the second section are designed in such a way that dispersion can be achieved and in the first process area grinding bodies, in particular spherical grinding bodies, are arranged.
  • the device according to the invention can be used, for example, for the production of paints, in particular car paints, printing inks, emulsion paints, emulsions, ceramic dispersions or the like.
  • the device according to the invention can be used as a premixing or predispersing unit, wherein the mixture produced by means of the device according to the invention can subsequently be fed to an agitating mill in order to achieve an even greater fineness of the dispersion.
  • smaller grinding auxiliary bodies typically spherical
  • At least two substances can be fed to the device via the at least one inlet.
  • this is a solid, such as a powder, as well as a liquid.
  • each substance may be supplied to the device via a separate inlet, with each material being supplied to the first process area.
  • the device is charged with a prescriptive premix of the substances to be mixed.
  • two inlets are present; This makes it possible to charge the device with separate streams of dispersant and disperse phase.
  • the device according to the invention is used for processing or producing mixtures with low to medium viscosity.
  • the dynamic viscosity of the mixtures is between about 0.1 and about 20,000 mPas, measured at the appropriate operating conditions of the device according to the invention for the respective product to be produced. Suitable operating conditions may be between -10 ° C and 110 ° C, preferably between room temperature and 60 ° C.
  • the at least two substances pass through the at least one inlet into the first process area of the device.
  • the at least two substances are mixed by means of the first section of the rotating rotor unit.
  • This first section of the rotor unit preferably comprises a stirring disk known per se, which is designed in this way is that it can entrain particles not only due to adhesion, but in particular also due to positive effects (for example, in the stirring disc penetrating channels).
  • Centrifugal forces generated by the rotation of the first section of the rotor unit flow the mixture of substances as well as the subsequent material flows from the first process area in the direction of the separation device; This is further supported by a negative pressure generated in the second process area by the ejection means, as will be explained below.
  • the separator may have static gaps, dynamic gaps, and combinations thereof.
  • Static columns are understood to mean those which are not formed by at least partial limitation by the rotor.
  • dynamic gaps are understood to mean those which are formed between the rotor and static elements of the device. It is understood that a separator may have both static and dynamic gaps. A respective gap width of the static and dynamic column does not have to be identical in this case.
  • Elements of a static separator may be fixedly connected to the housing or to the rotor unit in the first section.
  • Suitable elements of the separating device can extend perpendicularly from the respective surface of the housing into the interior and thus have two opposite axial ends.
  • the separator also has the task of a separation point for coarse contaminants, which may be contained in the solid, for example. These may be coarse particulate contaminants. By means of the separation device, at least such impurities are retained.
  • the gap width of the separator should not be greater than the distance of the ejector from the housing, starting from the smallest distance. In this way, damage to the ejection means can be effectively prevented. Furthermore, various embodiments can be implemented to carry out this task, some of which will be explained by way of example in the further course.
  • a gap is formed between the second end of the separator opposite the first end of this element of the separator and the first portion of the rotor unit (eg, the stirring disk).
  • the first section of the rotor unit preferably extends at least partially into the separating device in this case.
  • the gap thus formed is referred to as a dynamic gap, as explained above.
  • at least one planned gap or gap is formed in the radial direction between the separating device and the first section of the rotor unit.
  • the first section of the rotor unit can have a bead, so that a gap is likewise formed in the axial direction between the first section of the rotor unit and the separating device.
  • elements of the separator may be attached to the first portion of the rotor assembly.
  • the dynamic gap is formed between the element of the separating device rotating during operation of the device and the housing.
  • the separation device itself has gaps. These are referred to below as the static column.
  • the gap width of the static column corresponds to the gap width of the dynamic gap or gap.
  • the gap width of the separating device can be designed such that particles with a diameter of less than 4 mm, less than 3 mm, or less than 2 mm, or less than 0.25 mm can pass through the separating device when used as intended.
  • coarser particles, in particular foreign bodies are thus retained, which prevents destruction of the device according to the invention. This is due to the fact that no particles with a diameter greater than the distance between the ejector and the housing can pass through the separator.
  • the separator After the mixture has passed the separator, it enters the second process area.
  • the second process area In the second process area is the second section of the rotor unit, which has the ejection means.
  • a pressure difference is generated, which has been found in the context of the invention to be advantageous.
  • the ejection means supports a discharge of the mixture formed in the first process area through the outlet.
  • the ejection means preferably comprises a plurality of blades, paddles or the like for this purpose.
  • the ejection means extend in the housing such that only a small distance is formed between the housing and the ejection means.
  • the lower limit of a reasonable distance between ejector and housing (or other static parts) is due to the manufacturing tolerance of the device on the one hand and, on the other hand, by the urgent need for the ejector to move freely past static parts; Under these conditions, the distance can be chosen as small as possible.
  • the distance is typically between 20 mm and 0.25 mm, or between 15 mm and 0.25 mm, or between 5 mm and 0.25 mm. It was found that such selected distances between the ejection means and the housing caused an additional dispersing effect between the ejection means and the housing. This further improves the quality of the produced mixture.
  • the mixture can either be re-supplied to the inventive device or it can be supplied for further processing, for example, a stirred mill.
  • An advantage of the inventive device is due to the separation device, as discussed above, the integrated filter function against foreign substances and the advantageous in the context of the invention suction effect.
  • the rotor unit comprises a rotor disk which extends through elements of the separator and forms a dynamic gap with them.
  • the second portion of the rotor unit is thus located radially farther from the Rotor axis as the first portion of the rotor unit.
  • first portion and the second portion of the rotor unit are arranged adjacent to the rotor axis.
  • first and the second section of the rotor unit can thus be arranged one above the other with respect to a drive shaft of the rotor unit.
  • the separator may be disposed adjacent to the drive shaft at the first portion of the rotor assembly, which reduces the load on the separator during operation of the apparatus as compared to the embodiment described above. This will also be explained in detail later with reference to the drawings.
  • auxiliary grinding body in the context of the present invention comprises any freely movable, physically acting on the solid agent, in particular causing a mixing, (intensive) dispersion and / or a real comminution of aggregates, crystalline and amorphous structures.
  • the auxiliary grinding bodies have in particular a diameter, for example in the range of 0.5 to 8 mm, or 1 to 3 mm, or 0.7 to 2 mm.
  • a Mahltos crusher for example with a diameter of 8 mm.
  • Another Mahltosmaschine may Mahltosmaschine having an exemplary diameter of 1 mm.
  • the separating device furthermore serves to retain these auxiliary grinding bodies in the first process area. Accordingly, the gap width of the separation device, both with regard to the dynamic gap and the possibly existing static gaps, must be adjusted accordingly.
  • the gap width therefore preferably corresponds to a maximum of the holding selected size ranges.
  • mixing tools are provided in an equally preferred embodiment in the first process area. These may be provided on the first section of the rotor unit, on the housing or on both.
  • the mixing tools are pins that extend perpendicularly into the first process area from the housing and / or the surface of the first section of the rotor unit. In this way, accumulation of the Mahlospian is prevented on the separator.
  • the mixing method according to the invention is carried out in a device according to the invention and comprises the following steps: introducing at least two substances, in particular a solid and a liquid, into the housing of the device, then mixing the at least two substances in the first process region by means of the first section of the rotating rotor unit and passing the mixture through the separation device into the downstream second process area, then dispersing the mixture in the second process area, in particular between the ejection means and a wall of the housing or other static elements, and then discharging the mixture from the second process area by means of the second section Rotor unit arranged ejector.
  • the mixture is dispersed in the first process area by means of grinding auxiliary bodies, in particular spherical Mahlangeskörpen, preferably intensively dispersed, wherein the dynamic and / or the static column of the separator are less than or equal to half the diameter of Mahltosharm.
  • predispersion takes place.
  • the dispersion is further refined and homogenized by the ejection agent.
  • a premix stage can be arranged, as will be illustrated below on the basis of exemplary embodiments.
  • the mixing method according to the invention has the advantages already discussed above with reference to the device. Therefore, reference is made to the illustrations of the advantages of the invention as well as the mode of operation of the embodiments.
  • the mixing method comprises the further step of: dispersing the mixture in the second process area, in particular between the ejection means and the housing. If the distance between the ejection means and the housing chosen low enough, as described above, then it can lead to an intensification of the dispersion in this area.
  • the mixing method has the further step of: (intensive) dispersing the mixture in the first process area by means of spherical auxiliary bodies in particular, wherein the gaps of the separating device are preferably less than or equal to half the diameter of the auxiliary grinding bodies.
  • the device has mixing tools in the first process area on the housing and / or on the first section of the rotor unit.
  • the device according to the invention can be used in particular for mixing a solid, such as a powder, with a liquid.
  • a paint in particular a car paint
  • the apparatus is used to prepare mixtures that are low to medium viscosity.
  • the inventive device 1 is shown in a first embodiment in the sectional view and in plan view. In the following, the device 1 will be described during operation. In this case, a rotor unit of the device 1 rotates according to Fig. 2 clockwise.
  • the device 1 has a housing 10.
  • the housing 10 includes a fluid inlet and a solids inlet. The supply of the liquid and the solid can be effected via corresponding lines 20, 22.
  • the solid may be a powder 30 held in a container 32.
  • the liquid is for example water, oil or solvent, which is supplied in the direction of arrow A of the device 1 or is sucked by this.
  • the suction effect of the device 1 will be explained later in detail, so that it will not be discussed further at this point.
  • a separation device 40 which divides the housing 10 into a first process area 12 and a downstream second process area 14. Furthermore, in the housing 10, the rotor unit 50 is arranged, which is driven via an associated drive shaft 52.
  • the rotor unit 50 has a first section 54, which is arranged in the first process area 12, and a second section 56, which is arranged in the second process area 14.
  • the first portion 54 of the rotor unit 50 has a plurality of openings 58. Through the openings 58, the supplied powder 30 can be distributed together with the liquid in the entire first process area 12. Mixing of powder 30 and liquid is effected due to the rotation of the rotor assembly 50 and the openings 58 present in the first section.
  • the separation device 40 extends perpendicularly from the bottom or cover of the housing 10 in the direction of the surface of the first section 54 of the rotor unit 50.
  • the separation device 40 has static gaps and at least one dynamic gap.
  • the static gaps are formed in the separator 40 itself.
  • the separator may consist of a skeleton having corresponding static gaps.
  • the dynamic gap (s) are formed between the first portion 54 of the rotor unit 50 and the separator 40. Only a plan gap is shown.
  • the first portion 54 of the rotor unit 50 may have a bead so that an axial dynamic gap is also formed between the separator 40 and the first portion 54 of the rotor unit 50.
  • both the dynamic column and the static column are less than or equal to 4 mm. In this way, effectively contained in the powder, coarse particulate foreign body can be retained become. This is, as will be explained later, particularly advantageous, since thus damage to the second portion 56 of the rotor unit 50 can be avoided.
  • the mixture produced in the first process region 14 flows through the separating device 40 into the second process region 14.
  • an ejection means is arranged at the second portion 56 of the rotor unit 50.
  • the ejection means may be a plurality of blades 60. By means of the blades 60, a pressure difference is generated in the device 1, whereby at least the powder 30 can be sucked in automatically by the device during operation.
  • the device 1 according to the invention has a greater suction effect due to the ejection means. In this way, no forced conveyor are required to supply the solid of the device 1.
  • the blades 60 have a distance to the housing 10 of less than 2 mm in both the radial and in the axial direction. In this way, in addition to the mixing in the first process area 12, a dispersing between the blades 46 and the housing 10 in the second process area 14 can be realized. In addition, the blades 60 support a discharge of the mixture from the outlet 70 of the housing 10 in the direction of arrow B.
  • the blades 60 may, in addition to the in Fig. 2 also show a curved shape, which leads to a fluidically improved behavior of the device 1.
  • the mixture exiting the device 1 through the outlet 70 may be supplied again to the first process area 12.
  • the mixture can be further processed in a subsequent work step.
  • Fig. 3 shows a second embodiment of the inventive device 3.
  • the device 3 additionally Mahlcousharm 80 in the first process area 12.
  • 50 mixing tools 82 are arranged on the first portion 54 of the rotor unit.
  • the grinding aid bodies 80 and the mixing tools 82 in addition to a mixing of powder 30 and liquid in the first process area 12, an (intensive) dispersion up to the real comminution of aggregates, crystalline or amorphous structures can be realized.
  • the mixing tools 82 furthermore ensure that the auxiliary grinding bodies 80 do not collect on the separating device 40 but remain in motion.
  • the housing 10 also has mixing tools.
  • the size of Mahlosharm depends in particular on the substances to be processed.
  • the grinding auxiliary bodies have a diameter of less than or equal to 8 mm, preferably less than or equal to 3 mm and particularly preferably less than or equal to 1 mm.
  • the gap width in these cases must not be greater than half the diameter of the auxiliary grinding bodies 80 used. This applies both to the dynamic gap and to any static gaps that may be present .
  • Fig. 4 a third embodiment of the inventive device 5 is shown.
  • it is a horizontal device 5, with respect to the drive shaft 52.
  • the embodiments of the Fig. 1 to 3 a vertical device 1, 3 represents.
  • the basic operation of the device 5 is identical to the operation described above for the other embodiments.
  • a difference from the embodiment according to Fig. 3 lies only in the horizontal arrangement instead of in Fig. 3 shown vertical arrangement.
  • the device 5 according to Fig. 4 a supply hopper 90 for storing solid, which is supplied to the device in the direction of arrow C.
  • the presentation hopper 90 can be shut off with a slide 92.
  • the liquid line 20 has a slider 94.
  • liquid can be supplied via a bypass line 98 to the first process area 12 on the housing side opposite the solids inlet.
  • the one end of the bypass line 98 is arranged for this purpose on the first process area 12, while the second end of the bypass line 98 is disposed on the liquid line 20 upstream of the spool 94.
  • the bypass line 98 also has a slide 96.
  • the liquid is supplied to the first process area from a liquid container 100.
  • the mixture from the outlet 70 is supplied to the liquid container 100.
  • the liquid container 100 has a stirring tool 102 for stirring the liquid.
  • the mixture can thus flow several times through the device 5, whereby the quality of the mixture to be produced can be improved and the dispersity can be set more accurately.
  • FIG. 5 A fourth embodiment of the device 7 according to the invention is shown in FIG FIG. 5 shown.
  • a metering element 34 is arranged in the solids line 22 adjacent to the feed hopper 90.
  • the metering element 34 is, for example, a rotary valve. By means of the metering element 34, the supply of solids in the first process area 12 can be controlled in more detail.
  • the device 7 on the rotor unit on a Vormischabites 62 The premixing section 62 is axially spaced and disposed upstream of the first 54 and second sections 56 of the rotor assembly and is located in a premixing region 16 of the housing 10.
  • a distance of the premixing section 62 to the housing 10 is greater compared to the spacing of the first 54 and second sections
  • the premixing section 62 serves for pre-mixing of powder and liquid in the premixing region 16. In terms of flow, powder and liquid thus first move from the respective inlet into the premixing region 16.
  • Rotor unit 52 is a pre-mixing instead.
  • the premix flows via a separating element 42 into the first process region 14.
  • the separating element serves in particular for retaining grinding auxiliary bodies 80.
  • a gap width, both dynamic and static, or an opening size is therefore preferably at or below 4 mm. To this is also on the comments on the gap width in the Separator 40 referenced. With regard to the further material flow, reference is made to the above remarks in order to avoid unnecessary repetitions.
  • FIG. 6 shows a fifth embodiment of the device 9.
  • the first 12 and the second process area 14 are arranged axially spaced from each other.
  • the first portion 54 and the second portion 56 of the rotor unit are arranged axially spaced apart.
  • the second section 56 of the rotor unit openings 58. These openings are arranged distributed between the blades 60 and the drive shaft 52 of the rotor unit.
  • the general operation of the device 9 is identical to that of the Fig. 1 to 4 described operation. For this reason, no further statements are made, but refer to the above statements.
  • the first 12 and the second process area 14 are arranged axially one above the other, as already in the exemplary embodiment Fig. 6 , Furthermore, an intermediate wall 18 is arranged in the housing between the first 12 and the second process area 14.
  • the separator 40 is disposed on the first portion 54 of the rotor unit adjacent the drive shaft 52. Between the separator 40 and the intermediate wall 18 thus the dynamic gap is formed.
  • the dynamic gap may be a plan gap.
  • the sixth embodiment is particularly advantageous, since the separation device 40 does not have to retain the auxiliary grinding bodies in the mass, as in the other embodiments.
  • the auxiliary grinding bodies 80 are transported outwardly away from the separating device 40 as a result of the centrifugal forces acting on the auxiliary grinding bodies 80.
  • FIG. 8 shows the sequence of a mixing method according to the invention.
  • the mixing method according to the invention uses the device according to the invention.
  • a first step I at least two substances, in particular a solid and a liquid, are introduced into the first process area 12 of the device 1, 3, 5, 7, 9, 110.
  • step II the at least two substances are mixed in the first process area 12 by means of the first section 54 of the rotating rotor unit 50.
  • the device 1, 3, 5, 7, 9, 110 also has auxiliary grinding bodies 80 in the first process area 12, then this takes place additionally (intensively) dispersing the mixture in the first process area 12 by means of the preferably spherical grinding auxiliary bodies.
  • the gaps of the separating device 40 are less than or equal to half the diameter of the auxiliary grinding bodies 80.
  • step III the mixture thus produced flows through the separator 40 into the downstream second process area 14 (step III).
  • step IV the mixture is dispersed in the second process area 14, in particular between the ejection means and the housing 10.
  • step V takes place from the second process area 14 by means of the ejection means arranged on the second section 56 of the rotor unit.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)

Claims (13)

  1. Ensemble (1; 3; 5; 7; 9; 110) de mélange et en particulier de dispersion, comprenant :
    a) un boîtier (10) doté d'au moins deux entrées ainsi que d'au moins une sortie (70),
    b) un ensemble de séparation (40) disposé dans le boîtier (10) et permettant de diviser le boîtier (10) en une première partie de traitement (12) et une deuxième partie de traitement (14), l'ensemble de séparation (40) comportant des interstices statiques et/ou des interstices dynamiques et
    c) une unité de rotor (50) disposée à rotation dans le boîtier (10),
    d) la première partie de traitement (12) présentant une première section (54) de l'unité de rotor (50) de telle sorte que lorsque l'ensemble (1; 3; 5; 7; 9; 110) est en fonctionnement, un mélange et en particulier une dispersion de substances apportées par la ou les entrées et de préférence les deux entrées puisse être réalisés dans la première partie de traitement (12) au moyen de la première section (54) de l'unité de rotor (50) et
    e) la deuxième partie de traitement (14) étant disposée en aval de la première partie de traitement (12), après l'ensemble de séparation (40), et comprenant une deuxième section (56) de l'unité de rotor (50),
    f) l'unité de rotor comportant un disque de rotor qui s'étend à travers des éléments de l'ensemble de séparation et forme avec ce dernier un interstice dynamique,
    g) la deuxième section (56) de l'unité de rotor (50) présentant un moyen d'expulsion,
    h) la deuxième partie de traitement (14) et la deuxième section (56) étant configurées de telle sorte qu'une dispersion puisse être obtenue,
    caractérisé en ce que
    des corps auxiliaires de broyage (80), notamment des corps auxiliaires de broyage de forme sphérique, sont disposés dans la première partie de traitement (12).
  2. Ensemble (1; 3; 5; 7; 9; 110) selon la revendication 1, dans lequel le moyen d'expulsion est formé sur la deuxième section (56) de l'unité de rotor (50) de telle sorte qu'en fonctionnement correct, il longe les éléments statiques de l'ensemble et en particulier le boîtier (10) à une distance inférieure à 20 mm, de préférence inférieure à 15 mm et de façon particulièrement préférable inférieure à 5 mm.
  3. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel l'unité de rotor (50) a une forme essentiellement circulaire dans une coupe transversale perpendiculaire à l'axe de rotation et s'étend à travers l'ensemble de séparation (40) ou en ce que la première section (54) et la deuxième section (56) de l'unité de rotor (50) sont situées à distance mutuelle dans la direction axiale.
  4. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel lorsque l'ensemble (1; 3; 5; 7; 9; 110) est en fonctionnement, un effet d'aspiration peut être formé sur la ou les entrées au moyen du moyen d'expulsion.
  5. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel le moyen d'expulsion comporte plusieurs aubes (60) ou pales.
  6. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel des éléments de l'ensemble de séparation (40) sont fixés sur le boîtier (10) de telle sorte qu'un interstice dynamique est formé entre ces éléments de l'ensemble de séparation (40) et l'unité de rotor (50) et en particulier la première section (54) de l'unité de rotor (50), ou des éléments de l'ensemble de séparation (40) sont fixés sur l'unité de rotor (50), en particulier sur la première section (54) de l'unité de rotor (50), de telle sorte qu'un interstice dynamique est formé entre ces éléments de l'ensemble de séparation (40) et le boîtier (10).
  7. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel l'ensemble de séparation (40) présente plusieurs interstices statiques formés dans l'ensemble de séparation (40).
  8. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications 6 ou 7, dans lequel les interstices dynamiques et/ou les interstices statiques ont une taille inférieure ou égale à 4 mm, de préférence inférieurs ou égale à 3 mm et de façon particulièrement préférable inférieure ou égale à 2 mm.
  9. Ensemble (1; 3; 5; 7; 9; 110) selon la revendication 1, dans lequel les interstices dynamiques et/ou les interstices statiques ont une taille inférieure ou égale au demi-diamètre des corps auxiliaires de broyage (80).
  10. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel la première section (54) de l'unité de rotor (50) et/ou le boîtier (10) présentent des outils de meulage (82) dans la première partie de traitement (12).
  11. Ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications précédentes, dans lequel au moins un solide, en particulier une poudre, ainsi qu'un liquide, peuvent être amenés dans l'ensemble de mélange (1; 3; 5; 7; 9; 110).
  12. Procédé de mélange, en particulier de dispersion, comprenant les étapes suivantes réalisées en recourant à un ensemble (1; 3; 5; 7; 9; 110) selon l'une des revendications 1 à 11 :
    a) apport (I) d'au moins deux substances, en particulier d'un solide et d'un liquide, dans le boîtier (10) de l'ensemble (1; 3; 5; 7; 9; 110), ensuite
    b) mélange (II) des deux ou plusieurs substances dans la première partie de traitement (12) au moyen de la première section (54) de l'unité de rotor (50) en rotation et
    c) amenée (III) du mélange par l'intermédiaire de l'ensemble de séparation (40) jusque dans la deuxième partie de traitement (14) située en aval,
    d) dispersion (IV) du mélange dans la deuxième partie de traitement (14), en particulier entre le moyen d'expulsion et une paroi du boîtier (10) ou d'autres éléments statiques, et ensuite
    e) extraction (V) du mélange hors de la deuxième partie de traitement (14) au moyen du moyen d'expulsion disposé sur la deuxième section (56) de l'unité de rotor (50),
    tandis qu'à l'étape b), le mélange est dispersé et de préférence dispersé de manière intense dans la première partie de traitement (12) au moyen de corps auxiliaires de broyage (80) et en particulier de corps auxiliaires de broyage de forme sphérique, les interstices dynamiques et/ou les interstices statiques de l'ensemble de séparation (40) étant d'une taille inférieure ou égale à la moitié du diamètre des corps auxiliaires de broyage (80).
  13. Procédé de mélange selon la revendication 12, dans lequel l'ensemble (1; 3; 5; 7; 9; 110) présente des outils de mélange (82) dans la première partie de traitement (12), sur le boîtier (10) et/ou sur la première section (54) de l'unité de rotor (50).
EP12172400.9A 2012-06-18 2012-06-18 Dispositif et procédé de mélange, notamment de dispersion Not-in-force EP2676725B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12172400.9A EP2676725B1 (fr) 2012-06-18 2012-06-18 Dispositif et procédé de mélange, notamment de dispersion
PCT/EP2013/062280 WO2013189830A1 (fr) 2012-06-18 2013-06-13 Dispositif et procédé de mélangeage, en particulier de dispersion
TW102121333A TW201410317A (zh) 2012-06-18 2013-06-17 用於混合，特別是用於分散的裝置及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12172400.9A EP2676725B1 (fr) 2012-06-18 2012-06-18 Dispositif et procédé de mélange, notamment de dispersion

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EP2676725A1 EP2676725A1 (fr) 2013-12-25
EP2676725B1 true EP2676725B1 (fr) 2016-03-02

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Publication number Priority date Publication date Assignee Title
DE102016102728A1 (de) 2015-08-13 2017-02-16 Netzsch-Feinmahltechnik Gmbh Vorrichtung und Verfahren zum Dispergieren mindestens einer Substanz in einem Fluid

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB722820A (en) * 1951-01-02 1955-02-02 Jackson And Church Company A machine for disintegrating fibrous cellulosic material
CH355770A (de) * 1957-04-30 1961-07-31 Forsch Inst Professor Ing Chem Verfahren und Apparatur zur kontinuierlichen oder chargenweisen Behandlung von Stoffen und Stoffgemischen
DE1482391B1 (de) * 1964-06-20 1970-08-20 Draiswerke Gmbh Ruehrwerksmuehle
DE29613245U1 (de) * 1996-07-31 1996-09-26 Netzsch Erich Holding Mahlvorrichtung
JP3855213B2 (ja) 1997-08-25 2006-12-06 日本ペイント株式会社 分散方法及び分散機
DE20009105U1 (de) 2000-05-22 2000-08-10 Schroeder & Boos Misch Und Anl Vorrichtung zum Homogenisieren und/oder Dispergieren eines fließfähigen Gutes
DE102006012489A1 (de) 2006-03-16 2007-09-20 Netzsch-Feinmahltechnik Gmbh Verfahren und Vorrichtung zur Erzaufbereitung

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TW201410317A (zh) 2014-03-16
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