EP3261755B1 - Stirring device, stirrer and pox-autoclave - Google Patents

Description

State of the art

The invention relates to a stirring device according to the preamble of claim 1.

Stirrers with multiple stirring blades are known for stirring, mixing, homogenizing, dispersing and / or suspending in media.

From the US 5,409,313 A , the US 5,947,599 A as well as the US 5,292,193 A In each case stirrers with a Rührblattträger and several associated with the Rührblattträger stirring blades are known, wherein the stirring blades may consist at least substantially of a ceramic material.

The object of the invention is, in particular, to provide an agitator device having improved properties with respect to a stirring blade material. The object is solved by the features of claim 1, while advantageous embodiments and developments of the invention can be taken from the dependent claims.

Advantages of the invention

The invention is based on a stirring device having at least one at least substantially metallic stirring blade carrier and a plurality of stirring blades, which are connected to the stirring blade carrier, wherein the stirring blades consist at least substantially of a non-metallic material. In this context, an "agitator device" is intended in particular to be at least a part and / or an assembly, in particular a Subassembly, a stirrer, in particular an axially-conveying and / or radially-promoting stirrer, understood. In particular, the stirring device may also comprise the entire stirring element, in particular the entire axially conveying and / or radially conveying stirring element. In particular, the stirring element is different from a propeller and / or fan wheel, in particular for conveying air. In this context, a "stirring blade carrier" is to be understood as meaning, in particular, a unit or an element which is or is provided for receiving and / or arranging a plurality of stirring blades. By "intended" is intended to be understood in particular specially designed and / or equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state. Furthermore, the stirring blade carrier is in particular intended to transmit a rotary motion of a stirring shaft in particular directly to the stirring blades connected to the stirring blade carrier. The fact that the stirring blade carrier is "at least substantially metallic" should in this context be understood in particular to mean that the stirring blade carrier at least to a large extent and particularly preferably completely consists of an alloy and / or a metal, in particular stainless steel, duplex steel and / or advantageously titanium , in particular titanium of any degree, preferably with a degree of at least 2 and at most 12. The term "at least to a large extent" should be understood to mean in particular at least 50%, preferably at least 70% and particularly preferably at least 90%. Furthermore, the agitator blade carrier may in particular comprise at least one agitator hub, which is in particular provided to receive at least one agitator shaft in at least one operating state and / or to be fastened to the at least one agitator shaft. The at least one stirring shaft defines in particular the axis of rotation. In particular, the at least one agitator can at least partially, preferably at least for the most part and particularly preferably completely, consist of an alloy and / or a metal, in particular stainless steel, duplex steel and / or advantageously titanium. Advantageously, the at least one Rührorgannabe consists of the same material as the Rührblattträger. In particular, the at least one Rührorgannabe particular via an additional attachment unit, such as at least one flange, are connected to the at least one agitator shaft and / or attached to the at least one agitator shaft. Below that the stirring blades "at least consist essentially of a non-metallic material "should be understood in this context in particular that the stirring blades in particular at least 50%, preferably at least 70% and more preferably at least 90% of an organic material or material mixture, such as a plastic, and / / or a nonmetallic inorganic material or material mixture, for example a ceramic.

Such a configuration can provide a stirrer device having improved properties with respect to a stirring blade material. In particular, a known metallic paddle carrier can advantageously be combined with paddle blades of a non-metallic material adapted to the respective application. In particular, an advantageously simple and / or cost-effective adaptation and / or optimization and / or design of the stirring device, for example, with regard to wear characteristics, hygiene properties, weight and / or other material-dependent properties.

The non-metallic material is a ceramic material. A "ceramic material" is to be understood in this context, in particular an inorganic, non-metallic material. In particular, the ceramic material may be at least partially crystalline. In particular, the ceramic material is at least largely free of metallic properties based on metallic bonds in particular, but may include metal compounds such as metal oxides and / or silicates. Preferably, the ceramic material is at least largely formed by a non-oxide ceramic, in particular aluminum nitride, boron carbide and / or preferably silicon nitride and / or silicon carbide. In this way, an advantageous wear resistance of the stirring blades and thus an advantageously long service life of the stirring device can be achieved.

The stirring blades are detachably connected to the stirring blade carrier. By "releasably connected" is to be understood in this context, in particular, that a mechanical in particular non-positive and / or positive connection between the stirring blades and the Rührblattträger in particular without tools and / or by means of an assembly tool damage-free and / or non-destructive canceled and / or produced. In this way, an advantageously simple and / or quick exchangeability of the stirring blades, in particular in case of wear, are made possible.

The stirring blade carrier has at least one recess which is provided to at least partially accommodate at least one of the stirring blades. In particular, the stirring blade carrier has a plurality of, in particular identically to each other, recesses which are each provided to partially receive one of the stirring blades. The recesses are arranged in particular in the circumferential direction of the paddle carrier in particular equidistantly spaced from each other. In this way, an advantageously stable attachment of the stirring blades on the Rührblattträger done.

The recess has at least one partial area, which is designed to be continuous parallel to a rotation axis of the stirring blade carrier. Preferably, all the recesses each have a partial region, which is designed to be continuous parallel to a rotation axis of the stirring blade carrier. The at least one subregion is in particular slit-shaped introduced into the Rührblattträger. A profile of the subregion corresponds at least essentially to an outer contour of the stirring blade. In this way, an advantageous arrangement of the stirring blades can be achieved on the Rührblattträger.

It is also proposed that the stirring blade carrier has at least one carrier element which is at least substantially disc-shaped. In this context, a "carrier element" is to be understood as meaning, in particular, an element which is intended to serve the stirring blades on the To fix the stirring blade carrier. Preferably, the carrier element is formed integrally with the Rührblattträger and / or at least partially formed by the Rührblattträger itself. In particular, it is conceivable that the carrier element is formed in one piece and / or in several parts, in particular two parts, preferably four parts, particularly preferably identical Rührorgannabenteilen. In this context, "integral" should be understood to mean, in particular, at least materially bonded. The material bond can be produced, for example, by an adhesive process, an injection process, a welding process, a soldering process and / or another process that appears appropriate to a person skilled in the art. Advantageously to be understood in one piece, however, molded in one piece. Preferably, this is made one piece from a single blank and / or a cast. Furthermore, an "at least essentially disk-like" configuration of an object, in particular a configuration of the object, is to be understood, in which a minimal, especially imaginary cuboid just enclosing the object has a longest edge, which in particular is at least 10 times to a maximum of 25 times as long as a shortest edge of the cuboid. The carrier element preferably has an at least substantially circular base surface. As a result, an advantageously simple arrangement of stirring blades on the stirring blade carrier can be achieved. Furthermore, the agitator device can advantageously be formed simply and / or cost-effectively as a radially conveying agitator device.

In a preferred embodiment of the invention, it is proposed that the agitator blade carrier has at least two disc-shaped carrier elements which correspond to one another and which are provided to receive the agitator blades at least partially in an area between the carrier elements in an assembled state. In particular, the two carrier elements are provided to fix the stirring blades positively in a mounted state and / or in particular by a clamping force. In particular, the carrier elements are in an assembled state by means of at least one screw connection and preferably by means of a plurality of screw connections connected with each other. In this way, an advantageously simple and / or secure fixation of the stirring blades can be achieved.

Furthermore, it is proposed that the stirring blades have at least one blade element and at least one fastening extension which is connected in one piece with the blade element. In this context, a "blade element" is to be understood as meaning, in particular, an element which at least partially forms an effective surface of a stirring blade. In this context, a "fastening extension" should be understood as meaning, in particular, a geometric unit and / or a, in particular a geometric shape, which is arranged, in particular, on at least one surface and / or at least one subregion of the blade element. In this context, the term "in one piece" should in particular be understood to mean that at least one element of the fastening extension and / or the fastening extension is formed integrally with the blade element of the stirring blade. In particular, the attachment extension is provided for producing a non-positive and / or positive connection with the stirring blade carrier and in particular with at least one carrier element of the stirring blade carrier. In this way, an attachment of the stirring blades can advantageously be simplified and an advantageously secure connection between the stirring blades and the stirring blade carrier can take place.

It is also proposed that the fastening extension has at least one recess which is provided for receiving at least one fastening element. In particular, the attachment extension has a plurality of recesses. The recesses are intended, in particular, to receive, for example, a screw or a bolt, by means of which or by means of which the agitating blade having the attachment extension can be fixed to the agitating blade carrier and in particular to a carrier element of the agitating blade carrier. In this way, an advantageous simple and / or cost-effective attachment of the individual stirring blades can be achieved. Furthermore, an assembly effort for the exchange of individual stirring blades can be advantageously reduced.

It is also proposed that a blade element of the stirring blades has at least one recess which is provided for receiving at least one fastening element. The recesses are intended, in particular, to receive, for example, a screw or a bolt, by means of which or by means of which the agitating blade having the attachment extension can be fixed to the agitating blade carrier and in particular to a carrier element of the agitating blade carrier. The recess extends in particular at least substantially perpendicular to an active surface of the stirring blade. Preferably, the stirring blade in an embodiment with a recess in a blade element is free of fastening projections. In this way, an advantageous simple and / or cost-effective attachment of the individual stirring blades can be achieved. Furthermore, an assembly effort for the exchange of individual stirring blades can be advantageously reduced. Furthermore, an advantageously simple stirring blade geometry can be achieved.

Furthermore, it is proposed that the stirring blades and the stirring blade carrier are configured such that in an assembled state, in particular during a stirring operation, force flows from the stirring blades into the stirring blade carrier always run at least substantially perpendicular to a contact surface between the respective stirring blade and the stirring blade carrier. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. In this way, it can advantageously be achieved that the stirring blades, in particular in a contact region with the stirring blade carrier, experience predominantly a compressive load and a tensile load is at least largely avoided. As a result, damage to ceramic stirring blades caused in particular by tensile loads can be avoided.

It is also proposed that an active surface of the stirring blades in the assembled state is aligned at least substantially perpendicular to a plane of rotation of the stirring blade carrier. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. In this way it can be achieved that the agitator device has an advantageously high coefficient of performance, as a result of which the agitator device has an advantageously higher power input, in particular in comparison with differently designed agitator devices with the same agitator orifice diameter and the same circumferential speed.

Furthermore, an agitator with at least one drive unit, at least one agitator shaft and at least one agitator device which can be driven by means of the agitator shaft is proposed. As a result, an agitator having a advantageously improved service life and advantageously simplified maintainability can be provided.

Furthermore, a POX autoclave with at least one agitator is proposed. The POX autoclave is intended in particular for ore processing. The POX autoclave comprises at least one, in particular horizontally arranged container, in particular a pressure vessel, in particular for receiving an abrasive medium. A stirring shaft of the agitator is preferably arranged perpendicular to a, in particular horizontally arranged container axis and / or the container. In particular, the POX autoclave may also comprise a plurality of agitators, wherein at least two and / or at least three agitators may each be arranged next to each other. Furthermore, in particular between the respective agitators, in particular partially permeable, in particular medium permeable, in particular horizontally and / or vertically arranged partitions can be arranged, whereby in particular a continuous stirring process can be achieved. The system may in particular at least one partition wall and / or the, in particular in the container located, abrasive medium include. In particular, this makes it possible to provide, in particular with regard to wear, optimized and durable POX autoclave, in particular for ore preparation, with improved properties in terms of service life, maintenance and / or replacement interval.

The agitator device should not be limited to the application and embodiment described above. In particular, in order to fulfill a mode of operation described herein, the agitator device may have a number different from a number of individual elements, components and units mentioned herein.

drawings

Further advantages emerge from the following description of the drawing. In the drawings, three embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

ein als Radialrührer ausgebildete Rührorganvorrichtung in einer perspektivischen Darstellung,

Fig. 2

ein Rührblatt einer Rührorganvorrichtung,

Fig. 3

einen Ausschnitt eines Rührblattträgers mit montiertem Rührblatt gemäß Figur 2,

Fig. 4

eine Schnittdarstellung des Rührblattträgers mit montiertem Rührblatt aus Figur 3,

Fig. 5

ein alternatives Rührblatt einer Rührorganvorrichtung,

Fig. 6

einen Ausschnitt eines Rührblattträgers mit montiertem Rührblatt gemäß Figur 5,

Fig. 7

eine alternative Ausführung einer Rührorganvorrichtung,

Fig. 8

einen Ausschnitt eines Rührblattträgers mit montiertem Rührblatt gemäß Figur 7 und

Fig. 9

einen POX-Autoklav mit fünf Rührwerken, welche jeweils eine Rührorganvorrichtung gemäß einer der Figuren 1 bis 8 aufweisen.

Show it:

Fig. 1

a stirrer device designed as a radial stirrer in a perspective view,

Fig. 2

a stirring blade of a stirring device,

Fig. 3

a section of a Rührblattträgers with mounted stirring blade according to FIG. 2 .

Fig. 4

a sectional view of the Rührblattträgers with mounted stirring blade FIG. 3 .

Fig. 5

an alternative stirring blade of a stirring device,

Fig. 6

a section of a Rührblattträgers with mounted stirring blade according to FIG. 5 .

Fig. 7

an alternative embodiment of a stirring device,

Fig. 8

a section of a Rührblattträgers with mounted stirring blade according to FIG. 7 and

Fig. 9

a POX autoclave with five agitators, each of which a stirrer device according to one of FIGS. 1 to 8 respectively.

Description of the embodiments

FIG. 1 shows an example designed as a radial stirrer Rührorganvorrichtung 10 in an assembled state in a perspective view. Stirring device 10 comprises a metallic stirring blade carrier 12. In the present case, stirring blade carrier 12 is made of grade 12 titanium, for example. Further, stirrer device 10 includes a plurality of stirring blades 14 connected to stirring blade carrier 12. The stirring blades 14 are made of a non-metallic material. Preferably, the stirring blades 14 made of a ceramic material, preferably a non-oxide ceramic, such as silicon nitride or silicon carbide. The stirring blades 14 are arranged on the stirring blade carrier 12 in the circumferential direction. By way of example, eight stirring blades 14 are shown in the embodiment shown, but a different number is also conceivable. The agitator device 10 further includes a stirring orifice 52 disposed on the stirring blade carrier 12. The agitator hub 52 is provided to receive a stirring shaft 48 in at least one operating condition. The agitator hub 52 is provided to attach the agitator device 10 axially to the agitator shaft 48. An orientation of the stirring shaft 48 defines an axis of rotation 20 of the stirring device 10. The stirring blades 14 are arranged on the stirring blade carrier 12 in the illustrated mounted state such that an active surface 40 of the stirring blades 14 is aligned perpendicular to a plane of rotation 42 of the stirring blade carrier 12.

FIG. 2 shows an embodiment of a stirring blade 14a. The stirring blade 14a has a blade element 26a and a fastening extension 28a, which is in one piece formed with the blade element 26a. FIG. 3 shows a section of the Rührblattträgers 12a with a mounted stirring blade 14a in a plan view. The stirring blade carrier 12a has in the illustrated cutout a recess 16a, which is intended to partially receive the stirring blade 14a. The recess 16a in this case has a partial region 18a, which is designed to be continuous parallel to the axis of rotation 20a of the stirring blade carrier 12a. The stirring blade carrier 12a has a number of identical recesses 16a, which corresponds to a number of stirring blades 14a to be mounted. FIG. 4 shows a sectional view along the section line III-III. In this embodiment, the stirring blade carrier 12a has two disc-shaped carrier elements 22a, 24a which correspond to one another and which are provided to receive the attachment extension 28a of the stirring blades 14a between the carrier elements 22a, 24a in an assembled state. For this purpose, the carrier elements 22a, 24a form a region 56a which corresponds to the attachment extension 28a and in which the attachment extension 28a is fixed non-positively and positively in an assembled state. While the attachment extension 28a is arranged between the disc-shaped support elements 22a, 24a, the blade element 26a projects beyond the stirring blade carrier 12a on both sides. In the mounted state, the support elements 22a, 24a are connected to one another by means of fastening means 58a. With fasteners 58a loosened, the stirring blades 14a are removable from the stirring blade carrier 12a, whereby the stirring blades 14a are detachably connected to the stirring blade carrier 12a. This allows, for example in case of wear, a simple exchange of individual or all stirring blades 14a.

The stirring blades 14a and the stirring blade carrier 12a are designed in such a way that, in an assembled state, force flows 60a always run vertically from the stirring blades 14a into the fastening extensions 28a of the stirring blades 14a, in particular during a stirring operation. Thus, it can be achieved that the stirring blades 14a experience a compressive load, in particular during a stirring operation, while tensile loads are at least largely avoided.

In the FIGS. 5 to 8 Further embodiments of the invention are shown. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, with reference in principle to the same reference components, in particular with respect to components with the same reference numerals, to the drawings and / or the description of the other embodiments, in particular FIGS. 2 to 4 , can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the FIGS. 2 to 4 readjusted. In the embodiments of the FIGS. 5 to 8 the letter a is replaced by the letters b and c.

FIG. 5 shows an alternative embodiment of a stirring blade 14b. The stirring blade 14b has a blade element 26b and a fastening extension 28b, which is formed integrally with the blade element 26b. The fastening extension 28b has recesses 30b which are provided for receiving fastening elements 32b. FIG. 6 shows a section of the Rührblattträgers 12b with a mounted stirring blade 14b in a plan view. The stirring blade carrier 12b has in the illustrated cutout a recess 16b, which is intended to partially receive the stirring blade 14b. The recess 16b in this case has a partial region 18b, which is designed to be continuous parallel to the axis of rotation 20b of the stirring blade carrier 12b. The stirring blade carrier 12b has a number of identical recesses 16b, which corresponds to a number of stirring blades 14b to be mounted. The stirring blade 14b is detachably connected to the stirring blade carrier 12b by means of fastening elements 32b, which are passed through the recesses 30b of the fastening extension 28b. In this case, the fastening extension 28b rests on a surface of a disk-shaped carrier element 22b of the stirring blade carrier 12b, while the blade element 26b projects beyond the stirring blade carrier 12b on both sides. By loosening the fastening elements 32b, a simple exchange of individual stirring blades 14b can take place, for example in the event of wear.

The stirring blades 14b and the stirring blade carrier 12b are designed in such a way that, in an assembled state, force flows 60b always run vertically from the stirring blades 14b into the fastening extensions 28b of the stirring blades 14b, in particular during a stirring operation. Thus, it can be achieved that the stirring blades 14a experience a compressive load, in particular during a stirring operation, while tensile loads are at least largely avoided.

FIG. 7 shows an alternative embodiment of a stirring device 10c. The stirring device 10c has a metallic stirring blade carrier 12c and a plurality of ceramic stirring blades 14c connected to the stirring blade carrier 12c. To illustrate the structure, only six of eight possible stirring blades 14c are shown here in an assembled state. The stirring blade carrier 12c has a disk-shaped carrier element 22c. Furthermore, the stirring blade carrier 12c has circumferentially arranged recesses 16c, which are provided to partially receive the stirring blades 14c. FIG. 8 shows a section of the Rührblattträgers 12c with a mounted in one of the recesses 16c agitator blade 14c in a plan view. The recess 16c is triangular, wherein one side 62c of the recess 16c corresponds to an outer contour of the stirring blade 14c. For attachment of the stirring blade 14c to the stirring blade carrier 12c, a blade element 26c of the stirring blade 14c has recesses 34c for receiving fastening elements 36c, for example screws. In an assembled state, the stirring blade 14c is detachably connected to the stirring blade carrier 12c by means of the fastening elements 36c, the stirring blade 14c abutting against a contact surface 38c formed by the side 62c of the recess 16c which corresponds to the outer contour of the stirring blade 14c.

The stirring blades 14c and the stirring blade carrier 12c are designed such that, in an assembled state, force fluxes 60c from the stirring blades 14c into the stirring blade carrier 12c always, in particular during a stirring operation, run perpendicular to the contact surface 38c between the respective stirring blade 14c and the stirring blade carrier 12c. Thus it can be achieved that the stirring blades 14c in particular experience a compressive load during a stirring operation, while tensile loads are at least largely avoided.

FIG. 9 shows an exemplary POX autoclave 50 with a horizontally disposed container 64 and a plurality of arranged in the container 64 agitators 44. The agitators 44 each comprise a drive unit 46, a stirring shaft 48 and a means of the stirring shaft 48 can be driven agitator device 10a, 10b, 10c. The container 64 is divided in the present case by partitions 66 into four container areas. The agitators 44 are identical in the present case. The agitators 44 are arranged in the container 64 such that the respective axis of rotation 20 is arranged perpendicular to a horizontally arranged container axis. In the present case, the system comprises five agitators 44. In a first container region 70, two agitators 44 of the five agitators 44 are arranged. In the other container areas each have a further agitator 44 is arranged. In an operating condition, there is an abrasive medium in the container 64. The abrasive medium is formed in the present case as a suspension with a high solids loading. Further, the POX autoclave 50 exemplarily has two gassing lances 68 disposed in the first tank portion 70. The gassing lances 68 are provided to supply oxygen to the abrasive medium in the first tank area 70. Alternatively, it is also conceivable to arrange a different number and / or differently arranged and / or differently formed stirring elements, which may in particular have a stirrer device according to the invention, in a container.

Claims (10)

1. Stirring device with at least one at least substantially metallic stirring blade carrier (12a; 12b; 12c) and with a plurality of stirring blades (14a; 14b; 14c), which are connected to the stirring blade carrier (12a; 12b; 12c),
   wherein the stirring blades (14a; 14b; 14c) are at least substantially made of a non-metallic material, wherein the non-metallic material is a ceramic material, wherein the stirring blades (14a; 14b; 14b) are releasably connected with the stirring blade carrier (12a; 12b; 12c),
   wherein a mechanical connection, namely a negative-fit and/or positive-fit connection between the stirring blades (14a; 14b; 14c) and the stirring blade carrier (12a; 12b; 12c) is releasable and/or establishable in a damage-free and/or nondestructive manner and
   wherein the stirring blade carrier (12a; 12b; 12c) comprises at least one recess (16a; 16b; 16c) that is configured to at least partially accommodate at least one of the stirring blades (14a; 14b; 14c),
   characterised in that the recess (16a; 16b; 16c) comprises at least one partial region (18a; 18b; 18c) that is realized in a continuous fashion when viewed parallel to a rotational axis (20a; 20b; 20c) of the stirring blade carrier (12a; 12b; 12c).
2. Stirring device according to claim 1, characterised in that the stirring blade carrier (12a; 12b; 12c) comprises at least one carrier element (22a; 22b; 22c), which is implemented at least substantially disc-shaped.
3. Stirring device according to claim 2, characterised in that the stirring blade carrier (12a) comprises at least two disc-shaped carrier elements (22a, 24a), which are embodied corresponding to each other and are configured to accommodate, in a mounted state, the stirring blades (14a) at least partially in a region between the carrier elements (22a, 24a).
4. Stirring device according to one of the preceding claims, characterised in that the stirring blades (14a; 14b) comprise at least one blade element (26a; 26b) and at least one fixation protrusion (28a; 28b), which is connected to the blade element (26a; 26b) in a one-part implementation.
5. Stirring device according to claim 4, characterised in that the fixation protrusion (28b) has at least one recess (30b) that is configured for an accommodation of at least one fixation element (32b).
6. Stirring device according to one of the preceding claims, characterised in that the blade element (26c) has at least one recess (34c) that is configured for an accommodation of at least one fixation element (36c).
7. Stirring device according to one of the preceding claims, characterised in that the stirring blades (14a; 14b; 14c) and the stirring blade carrier (12a; 12b; 12c) are implemented in such a way that, in a mounted state, force flows (60a; 60b; 60c) from the stirring blades (14a; 14b; 14c) into the stirring blade carrier (12a; 12b; 12c) always go at least substantially perpendicularly to a contact surface (38a; 38b; 38c) between the respective stirring blade (14a; 14b; 14c) and the stirring blade carrier (12a; 12b; 12c) and/or always go at least substantially perpendicularly from the stirring blades (14a; 14b; 14c) into the fixation protrusion (28a; 28b).
8. Stirring device according to one of the preceding claims, characterised in that an effective surface (40a; 40b; 40c) of the stirring blades (14a; 14b; 14c) is in the mounted state oriented at least substantially perpendicularly to a rotational plane (42a; 42b; 42c) of the stirring blade carrier (12a; 12b; 12c).
9. Stirring agitator with at least one drive unit (46), at least one stirring shaft (48) and at least one stirring device (10a; 10b; 10c) according to one of the preceding claims, which is drivable by means of the stirring shaft (48).
10. POX autoclave with at least one stirring agitator (44) according to claim 9.

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