Wear protection sleeve for an agitator ball mill, stirred ball mill and method for producing a wear-resistant sleeve for a stirred ball mill

13-03-2020 дата публикации
Номер:
CH0000715325A2
Принадлежит: Netzsch Feinmahltechnik
Контакты:
Номер заявки: 19-20-1078
Дата заявки: 27-08-2019

[1]

[0001] The present invention relates to a wear sleeve for a stirred ball mill, an agitator ball mill and a method for manufacturing a wear-resistant sleeve for a stirred ball mill according to the features of independent claims.

State of the art

[2]

[0002] The invention relates to a stirred ball mill, in particular an impeller for a agitator ball mill. The agitator ball mill is an apparatus for coarse -, - fine comminution and grinding or homogenizing. An agitator ball mill consists of a vertically or horizontally disposed, usually approximately cylindrical milling container, 70% to 90% filled with grinding bodies to. The grinding container is stored at agitator ball mills usually stationary. Many conventionally known mills are filled by a central opening in one of the end walls. Can also alternatively be effected directly on the grinding cylinder filling. The grinding product flows in the milling process to continuously from a product inlet axially through the grinding chamber to a product outlet. The suspended solids are comminuted by impact and shear forces in - between the grinding bodies or dispersed. In an outlet region separating the grinding body then takes place from the product stream. The discharge is dependent on the configuration and is achieved by e.g. a screen at the mill end.

[3]

[0003] The agitator is usually formed by a stirring shaft, the serving, stirring elements in the form of disks or radially projecting pins to rotate, in particular in liquid distributed solids of the ground material to deagglomerate and crushing. The agitator shaft is usually driven by a motor. As appropriate stirring elements of at a stirring shaft used with a plurality of mill disks in particular disk stirrer. The grinding disks are usually circular and can be provided with openings. On the passage opening is ensured in particular the product flow.

[4]

[0004] Between the inside of the grinding cylinder and the agitator is an annular grinding gap formed, in which during operation of the agitator ball mill grinding is to be comminuted. The agitator is driven in rotation and the material to be ground within the grinding gap so claimed, whereby this is crushed, which is supported by the body for a grinding and partly by stirring elements of the agitator. In particular the material to be ground and the grinding bodies are moved by means of a stirring shaft intensive. Here the solid particles of the mill are comminuted by impact, pressure, shear and friction.

[5]

[0005] Many processes, chemical, mechanical or other, run to produce process heat from, the process flow itself or the starting materials used which may negatively affect, for example because the actors involved in the process are temperature sensitive substances or the temperature change effect on process speed and thus an ordered process control more difficult. For this reason it is usual, stabilize a process flow, for example by the process heat generated by means of suitable cooling devices or - process is derived. In containers are on the container wall discharge end processes mostly tempered, for example on the wall extending cooling - or hot water pipes or by another, arranged radially spaced from said first container outer container is guided around the first container, so that a cavity is formed between the two vessels, through which a fluid stream, which may be a hot water flow or a coolant stream, for transporting the process heat can be conducted.

[6]

[0006] Also grinding process in which heat is produced. This heat must be dissipated or it depending on the product form a heat must be prevented. The problem is especially agitator ball mill grinding with a large volume or if a higher power is desired a support. For cooling is provided during the grinding process for example, the grinding cylinder developing can be cooled. The Offenlegungsschrift describes for example DE36147A1 the equipment of the grinding container having a cooling jacket as known state of the technique. This document further discloses, that the rotor can also be provided with at least one agitator at its periphery cooling channel. A grinding container with cooling jacket will continue in the Offenlegungsschrift WO2007/042059A1 shown. The agitator mill has an inner stator further described in this document, can be also cooled. The agitator is cup-shaped and comprises a ring cylindrical rotor.

[7]

[0007] As already mentioned in connection with the DE3614721A1 mentioned, can be alternatively or additionally also realized on the agitator cooling the rotor. The Offenlegungsschrift DE3015631A1 from an inner - and an outer cylinder describes a stirrer, between which an annular cooling chamber is formed, wherein a coolant supply conduit for cooling within the cooling space is arranged axially parallel, connected to a feed pipe for coolant.

[8]

[0008] From a certain size must be constructed from ceramic or agitators stirring shafts from a plurality of components. Each other to produce the individual parts fit, much grinding work is necessary, whereby the costs are very high due to the necessary working time. Assembling a plurality of parts from the stirring shaft also arise on so-called dead spaces, and/or grinding body can be ground in which fix the machine room and thus pollute. Such multi-part ceramic stirring shafts are also very sensitive to fracture, particularly during assembly, disassembly, cleaning and maintenance. It is also not available yet, ceramic rotors produce with a cooling.

Description

[9]

[0009] The task of the invention is, a wear-resistant sleeve for a stirred ball mill simple and economical to produce, in particular a coolable wear protection sleeve for use in high-agitator ball mill.

[10]

[0010] The above task is achieved by a wear-resistant sleeve for a stirred ball mill, an agitator ball mill and a method for manufacturing a wear-resistant sleeve for a stirred ball mill dissolved, the features in the independent claims comprise. Further advantageous configurations are described by the dependent claims.

[11]

[0011] The invention relates to an agitator ball mill, a wear-resistant sleeve for a stirred ball mill and a method for manufacturing a wear-resistant sleeve for a agitator ball mill. In the agitator ball mill described here especially from a stirred ball mill with a horizontal or vertical axis extending along a grinding container. For addition of the ground material a mill-inlet is provided. For removing the product in the form of comminuted material for grinding a product outlet is provided. The agitator ball mill comprises a rotatable about the horizontal or vertical axis within the grinding vessel agitator shaft with agitating elements. The stirring shaft is associated with a wear protection sleeve in the region of the product outlet, which is formed in one piece and formed by a 3d pressure is in part made, consisting of a ceramic material. Particularly preferably the wear protection sleeve of silicon carbide (SiC and), especially sintered Siliziumcarbit (ßic), with free silicon (SiSiC) silicon carbide, silicon nitride, zirconia or of mixed ceramics is produced. Silicon carbide ceramics have a high wear resistance -, low thermal shock sensitivity, low thermal expansion, high thermal conductivity, good resistance to acids and alkalis and also easily and are still retain their properties up to temperatures above 1400 °c positive. Silicon carbide is also toxicologically safe and may therefore be also used in the food field. Silicon nitride has a reduced hardness when compared with silicon carbide, but by a sintering process can be stängelige recrystallization of the β-silicon nitride crystals effected, resulting in an increased fracture toughness of the material. The high fracture toughness in combination with small defect sizes gives one of the highest strengths under the silicon nitride ceramic materials engineering. By the combination of high strength, low coefficient of thermal expansion and elastic modulus is especially suitable for relatively small silicon nitride ceramic components subject to thermal shock. Unlike other ceramic materials has a very high resistance to the propagation of cracks zirconia. Furthermore a very high thermal expansion and zirconia ceramic is selected in realizing therefore prefer connections between ceramic and steel.

[12]

[0012] Preferably is provided, on its outer circumferential surface that the wear protection sleeve at least partially comprises at least one cooling means comprises and/or part of elevations and forms cooling system.

[13]

[0013] The closing has a hollow cylindrical shape and a longitudinal axis substantially protection sleeve on. The longitudinal axis of the wear-resistant sleeve is coaxially to the longitudinal axis of the grinding container within the agitator ball mill and the stirring shaft arranged coaxially to the longitudinal axis. The protuberances can be formed for example in the form of cam, the extending radially outward. The elevations or cams are preferably in a regular pattern on the outer surface of the wear-resistant sleeve. In particular elevations can in each parallel to the longitudinal axis aligned arrangement in rows a wear protection sleeve be arranged. Alternatively or additionally the elevations along parallel rows of circumferential lines of the wear protection sleeve be arranged.

[14]

[0014] The shape of the elevations can both accept any geometric shape in axial section and in radial viewing, for example trapezoidal, with rounded corners, with chamfered edges etc is provided in particular, that a cylindrical basic body formed on the wear protection sleeve connecting surface of the protuberances is formed relatively large, in particular in relation to the radial height of the elevations.

[15]

[0015] Preferably is provided, that the wear protection sleeve including elevations and optionally including cooling means is integrally made of a ceramic material, in particular a 3d printing method applies -. In this way it is possible to produce a component having internal cavities, such as injection molding or the like without further post-processing with conventional methods, for example post-without drilling holes or the like, can be produced in one process step would not. It is possible now however, simple and inexpensive form at least one integrated cooling device within the wear protection sleeve.

[16]

[0016] Described above by the shape of the protuberances which is made from a ceramic - or decreased significantly from sensitivity of the protuberances with respect to break out. The integral execution of the wear protection sleeve both stability and promotes heat conduction, since potential breaking points and heat conduction barrier omitted.

[17]

[0017] The stirring shaft of the agitator ball mill on the side directed towards the product outlet has an internal cavity at least partially on, in particular is the product outlet facing end of the agitator shaft to the inner cavity formed open. In particular is provided, that the wear protection sleeve into the hollow interior portion of the stirring shaft extends partially, wherein the wear protection sleeve from the free end of the stirring shaft extends from product outlet toward ground material inlet. It is provided, that the wear protection sleeve in the region of the cam has a maximum outer diameter, the inner diameter of the inner cavity of the stirring shaft is less than a.

[18]

[0018]Amounting portion at an end portion of the wear-resistant sleeve, for example a flange, be provided, the wear protection sleeve to position and fix in or on the agitator ball mill. Preferably the milling container bottom has a corresponding receptacle for the flange of the wear sleeve on, wherein via suitable fastening possibilities, for example screwing, clamping or the like, fixation of the wear protection sleeve can take place on the milling container bottom. The fixing is preferably detachably, so that the wear protection sleeve when required, for example defective on the wear protection sleeve, can be replaced. The mounting portion is also preferably part of the integrally formed sealing protection sleeve and particularly on the wear protection sleeve is subsequently mounted.

[19]

[0019] According to one embodiment is provided, that the cooling device is formed as at least one cooling channel the wear protection sleeve, which preferably extends at least partially parallel to the longitudinal axis of the wear protection sleeve. At least two cooling channel sections providing - in particular can the cooling device, the deflection region are connected to each other via a flow, wherein the coolant flows through the two cooling channel sections in oppositely directed - flow directions.

[20]

[0020] According to one embodiment is provided, that the cooling device interconnected, the meandering cooling channel - portions, for example at least two cooling channel extending parallel to the longitudinal axis - portions each agitator shaft, wherein between the two parallel portions is formed a cooling channel - deflection region. If one considers a wear protection sleeve in axial cross-section, in this embodiment the cooling channel sections are then preferably each - in the same radial distance from the longitudinal axis of the wear protection sleeve defined by the mid-point. A coolant inlet and a coolant outlet with at least one cooling channel or connection to the said at least two cooling channel sections are preferably provided in the attachment portion of the wear-resistant sleeve -. Has the milling container bottom corresponding coolant connections on correspond thereto, so that the coolant on the milling container bottom into the wear protection sleeve again introduced and can be discharged.

[21]

[0021] The coolant is input into a first cooling channel section via the refrigerant in a first flow direction parallel to the longitudinal axis and introduced through this wear protection sleeve. In the end region of the wear sleeve, the coolant inlet or opposite attachment portion, is a deflection area between the first cooling channel section and a second section formed - cooling channel, the cooling channel sections interconnecting the two - flow. The coolant flows through the second cooling channel is diverted and portion in a second flow direction opposite the first direction of flow -. Adjacent the mounting portion is another deflection area between the second portion and a third portion formed - - cooling channel cooling channel, the cooling channel fluidically interconnecting the two - sections. The coolant flows through the third cooling channel in the first portion is diverted and - flow after flowing through a cooling channel section in the second flow direction last etc. is the coolant through the coolant output discharged. By the meander-shaped arrangement of the cooling channel sections is formed a large cooling surface and an optimal cooling of the agitator ball mill outlet in the region of the product obtained.

[22]

[0022] Can alternatively be provided, that the at least one cooling channel extending at least partially helically about the longitudinal axis of the wear-resistant sleeve is formed. The coolant flows through the cooling passage and is here passed helically about the longitudinal axis. The flow direction of the coolant in the cooling channel - a movement component in the first portion can be helical or have a movement component in the second flow direction of flow.

[23]

[0023] According to a further embodiment is provided, as a so-called counter-current cooling that the cooling device is formed. Here is also provided, in that the cooling device a plurality of respective parallel, in particular cooling channel extending parallel to the longitudinal axis of the wear protection sleeve - portions. If one considers a wear protection sleeve in axial cross-section, then in this embodiment are two portions arranged on a radial cooling channel -, the wear protection sleeve extending from a longitudinal axis defined by the center to the outer periphery of the wear-resistant sleeve.

[24]

[0024] In the counter-current cooling the coolant flows through the cooling channel located on a common radial - sections successively, so that one of the two on the same radial cooling channel located in a first flow direction is by fins - sections, while the other of the two portions of the coolant flows through the cooling channel in a reverse direction is -. For deflecting the flow direction of the coolant in an end region of the wear-resistant sleeve is provided a deflection region, the two cooling channel sections interconnecting flow. Also in this embodiment is preferably the coolant over the attachment area of the wear-resistant sleeve and the milling container bottom and discharged and passed through a closer to the center of the first - to wear protection sleeve disposed first cooling channel portion toward the inlet of the agitator ball mill grinding - and then a second cooling channel - section on the same radial, but closer to the outer surface of the wear-resistant sleeve is arranged, in the direction of the product outlet.

[25]

[0025] In the counter-current cooling can be provided, the coolant inlet that is associated with a first annular gap, via which the coolant is supplied simultaneously a plurality of first cooling channel - portions. A second annular gap can further be provided, the coolant in the second coolant passage - and cut off from all flows via the refrigerant output is derived.

[26]

[0026] Using the countercurrent cooling is achieved, and thus that the freshest coolest coolant into a region of the first agitator ball mill is guided, wherein the ground material is warmest. This is particularly the region near the product outlet, the material to be ground in the conveying direction of the material to be ground after the agitator ball mill inlet - side has passed through. In particular the coolant flows through the wear protection sleeve to the outer surface of the wear protection sleeve in the opposite direction to the conveying direction of the mill within the terminal thus inner cavity of the stirring shaft. The cooling process can be further optimized through this countercurrent cooling.

[27]

[0027] In the embodiments described here can in particular with a meander-shaped cooling, a helical cooling or be provided with counter-current cooling, - that the cooling channel sections parallel to rows of protuberances on the outside of the wear protection sleeve and thus extend the wear protection sleeve in the region of the elevations is a preferred cooling, since in this area due to the stress of the mill and/or the grinding body by the elevations a particularly strong heating takes place within the agitator ball mill.

[28]

[0028] Another possibility for cooling the agitator ball mill in the region of the product outlet comprises a specially trained receiving part operatively connected to a corresponding wear protection sleeve. In particular the product outlet is formed by a receiving part, that region-wise within the stirring shaft is arranged. In particular is the receiving part from the free open end of the stirring shaft in which regions near the grinding container bottom in the direction of the ground material inlet extending internal cavity of the stirring shaft. The receiving part further extends partially through the bottom of the agitator ball mill grinding container. The receiving part has a substantially hollow-cylindrical basic shape with a longitudinal axis and a cylindrical interior open on both sides and is disposed within the agitator ball mill such, that the longitudinal axis of the receiving part and the stirring shaft are disposed coaxially. Outlet channel having an open end portion than the interior particular forms a product outlet. The product outlet end portion of the receptacle is at least in regions by forming a wear-resistant sleeve, while at the opposite, within the interior cavity of the stirring shaft end region arranged a separating device, in particular a screen or the like is arranged. Hereinafter referred to as product sufficiently comminuted material - - referred in the cylindrical interior of the socket is passed over the separator and by according urgent product for product outlet in the grinding container transported towards the bottom. Prevents the separating device, into the interior of the receiving part is that grinding body. The grinding bodies are instead on vias within the stirring shaft back into the grinding gap transported.

[29]

[0029] The receiving part has at least one profile on, the operatively associated with the wear protection sleeve forms a cooling system. In particular is a portion of the outer surface area of the tray near the product outlet has a plurality of elevations and/or depressions have a profile and on. For example the portion is formed with recesses as external thread, wherein the recesses are each spaced and separated by ridges. Such a wear-resistant sleeve is placed on the receiving member, a sealing connection between the wear sleeve and the receiving part that is prepared, wherein in the region of the profiling of the wear-resistant sleeve are formed between the receiving portion and cooling channels. In particular there is a sealing compound between the receiving part of the external thread extending helically around the inner shell surface and increases wear protection sleeve. Thereby forming the depressions of the receiving part has a receiving part extending helically around the cooling channel of the cooling system by the receiving part and the wear protection sleeve formed from together.

[30]

[0030]Afurther component of the cooling system by at least one internal cooling passage of the female part is formed wear protection sleeve, wherein a coolant inlet in the inner cooling channel and then the first coolant preferably between the holder and the wear-resistant sleeve is fed coolant passage formed. The coolant flows through the outer cooling channel in a direction toward the product outlet is preferably directed and subsequently discharged via a coolant output. Preferably the refrigerant outlet is formed on the receiving portion adjacent to the product outlet. Alternatively can be provided, that the coolant from the cooling channel into a respective channel - portion of the wear-resistant sleeve and thus introduced is derived. The cooling system serves in particular the cooling of the product on passage through the outlet channel of the receiving part and subsequent exit on the product outlet. Depending on the production conditions can alternatively also be provided, that the coolant over the outer cooling channel from the first side toward the inlet side is guided to be ground product outlet and the inner cooling channel flows through product outlet for deflection towards. Further embodiments are conceivable for the expert of the receiving part, in which the profiling for forming a cooling channel at the opposite end of the product outlet side suitable or substantially over the entire length of the receiving part of the receiving part is formed.

[31]

[0031] According to a further embodiment can be provided, a spiral cooling channel formed within the wear protection sleeve that is, at least partially extends helically about the longitudinal axis of the wear protection sleeve. The coolant flows through the cooling passage and will helically about the longitudinal axis around the wear protection sleeve. The flow direction of the coolant in the cooling channel portion can a movement component in the direction of the spiral - product outlet or a movement component in the opposite direction, i.e. away from the product outlet, have. The coolant guide for example is analogous to helical coolant guide, as has been described above in connection with the receiving part already, that the cooling channel is formed completely within the wear protection sleeve only and not through the interaction of the wear protection sleeve and receiving part is formed. An outer and an inner spiral coolant can also be constructed coolant coil, wherein the outer coolant coil closer to the outer surface of the wear-resistant sleeve is formed and the inner coolant closer to the inner circumferential surface of the wear-resistant sleeve spiral. For example the inner spiral can now the coolant first coolant in a flow direction counter to the flow direction of the product with a movement component within the product outlet stream and cooling this here. Over the outer coolant the coolant discharged from the wear protection sleeve then is spiral. Depending on the production conditions but also the outer coolant supplied to the coolant can spiral and over the inner coolant spiral are withdrawn again.

[32]

[0032] It should be expressly mentioned at this point, that all aspects and execution variants, the invention explained in connection with the device, also part of the process of the invention may be or aspects relate. Therefore when at a location in the description or in the definitions for certain aspects and/or related device of claim invention or talk and/effects, this applies as well to the process of the invention shall apply. The same applies in the reverse manner, so that all aspects and execution variants, the process of the present invention have been explained in connection with the, also part of the invention may be or aspects relating device. Therefore when at a location in the description or in the process of the present invention certain aspects and/or related claim definitions for and/or effects of the speech is, the apparatus of the present invention equally apply for this.

Figures list

[33]

[0033] In the following the invention and its advantages to embodiments with reference to the enclosed Figures explain. The size ratios of the individual elements to each other in Figures do not always meet the real size ratios, since some forms and other forms for better illustration simplified in relation to other elements are represented increased.

  • 1 shows a side view a wear-resistant sleeve.
  • 2 shows a perspective view of a wear-resistant sleeve.
  • 3 shows a perspective view along a cutting line C C according to 1 sliced wear protection sleeve.
  • 4 shows a cross section along the cutting line a C C according to 1 sliced wear protection sleeve.
  • 5 shows a longitudinal section through an agitator ball mill with a wear-resistant sleeve according 1 to 4.
  • 6 shows a cross section through a stirred ball mill according to 5 along a line B-B.
  • 7A to 7E a second embodiment of a wear-resistant sleeve show different representations.
  • 8A to 8E a third embodiment of a wear-resistant sleeve show different representations.
  • 9A to 9E different representations show a receiving part.
  • 10 shows a longitudinal section through an agitator ball mill with receiver part according Figure 9a to 9e.
  • 11 shows a partial cutout in the outside of a Verschleißschutzhülse.

[34]

[0034] For elements that are identical or identical reference symbols of the invention are used. Reference symbols in the various Figures for reasons of clarity only are further represented, for the description of the respective Figure are required. The illustrated embodiments are only examples is, as the inventive device or the process of the invention can be made and not impose limitation is final.

[35]

[0035] 1 to 4 show different views and sectional representations of an invention of integral wear protection sleeve 30. Such a wear-resistant sleeve 30 is preferably used in a stirred ball mill 50, as below with reference to the 5 and 6 is explained in more detail.

[36]

[0036] The wear protection sleeve 30 is preferably integrally formed from a ceramic material and can for example and in particular made of a ceramic material in the 3d printing process are prepared. Wherein the ceramic material may be for example silicon carbide (SiC and), especially sintered Siliziumcarbit (ßic), silicon carbide (SiSiC) with free silicon, silicon nitride, zirconium oxide or mixed ceramics act. Silicon carbide ceramics have a high wear resistance -, low thermal shock sensitivity, low thermal expansion, high thermal conductivity, good resistance to acids and alkalis and also easily and are still retain their properties up to temperatures above 1400 °c positive. Silicon carbide is also toxicologically safe and may therefore be also used in the food field. Silicon nitride has a reduced hardness on when compared with silicon carbide. By a sintering process can however the β-silicon nitride crystals are effected a stängelige recrystallization, resulting in an increased fracture toughness of the material leads. The high fracture toughness in combination with small defect sizes gives one of the highest strengths under the silicon nitride ceramic materials engineering. By the combination of high strength, low coefficient of thermal expansion and elastic modulus is especially suitable for relatively small silicon nitride ceramic components subject to thermal shock. Unlike other ceramic materials has a very high resistance to the propagation of cracks zirconia. Furthermore a very high thermal expansion and zirconia ceramic is selected in realizing therefore prefer connections between ceramic and steel.

[37]

[0037] The wear protection sleeve 30 is cylindrical at least in regions, in particular the wear protection sleeve has a hollow cylinder having a longitudinal axis on the base body 32 30 33 l30, on the outside thereof preferably elevations 34, especially in the form of cam 35 are described in more detail subsequently formed. The outer surfaces of the cam 35 and the outer surfaces of the cylindrical base body 35 not covered by cam 32 together form the outer surface of the wear-resistant sleeve 30.

[38]

[0038] The hollow cylinder 33 has a maximum outer diameter d30 on, less than a lowest inner diameter of a third interior region subsequently described agitator shaft III is 1 (comparisons 5 and 6). Wear protection sleeve at one end portion of a mounting portion 30 can, for example a flange 36, be provided, the wear protection sleeve 30 in or on the agitator ball mill 50 to position and fix, especially the wear protection sleeve 30 on the milling container bottom 59, in particular in a suitable receiving at the milling container bottom 59, - set comparisons 5.

[39]

[0039] The elevations or cam 35 are preferably arranged in a regular pattern 34. In particular are the cam 35 for an aligned arrangement in rows parallel to the longitudinal axis in each of the wear-resistant sleeve 30 arranged l30 100, are also parallel rows along the cam 35 of circumferential lines 101 of the wear-resistant sleeve 30 arranged.

[40]

[0040] As in the intersection representations of the 3 and 4 seen, the wear protection sleeve 30 shows a generally circular cross section, a longitudinal axis of the wear-resistant sleeve 30 whose center by l30 extends.

[41]

[0041] The wear protection sleeve 30 comprises at least one cooling device 37. in the shown embodiment the cooling device 37 is formed as countercurrent cooling. In particular is provided, a plurality of parallel cooling channel that the cooling device 37 - portions 38a, 38b comprises, wherein each cooling channel - two parallel portions 38a, 38b are arranged on a radial R is, extending from the longitudinal axis of the main body 32 of the wear-resistant outer surface for l30 from sleeve 30 extends from. In particular can be provided, that the cooling channel - portions 38a, 38b extend parallel to rows 100 the cam 35 and thus a preferred cooling sleeve in the region of the cam 35 is the wear pad 30, since in this area due to the stress of the mill and/or a particularly strong heating of the grinding media by the cam 35 within the agitator ball mill takes place.

[42]

[0042] In the counter-current cooling is especially provided, that in the cooling channel - portions 38a, 38b a coolant is introduced, - that the two cooling channel sections 38a, 38b, each extending on a common radial R are, flow successively. Preferably it is provided, that first the inner cooling channel portion of said refrigerant is - 38a flows through. The coolant in the end portion of the wear-resistant sleeve 30 is subsequently, the opposite fastening flange 36, and flows in the opposite direction through the outer cooling channel now deflected 38b - portion.

[43]

[0043] In particular can be provided, at the flange 36 or within the flange 36 is formed a first annular gap or the like, so that coolant in all inner cooling channel sections 38a - can enter simultaneously. On the flange 36 or within the flange 36 may further be provided a second annular gap, via which the coolant can be discharged simultaneously from all outer cooling channel 38b - portions.

[44]

[0044] 5 and 6 show different representations of an agitator ball mill with a wear-resistant sleeve 50 30, as in connection with the 1 to 4 has been described, in particular shows 5 a longitudinal section through the agitator ball mill 50 and 6 shows a cross section along an intersection line b - b according to 5.

[45]

[0045] The agitator ball mill 50 includes a cylindrical grinding container extending along a horizontal axis l50 51 with an inner circumferential surface 52 of the grinding container 51 may be formed of metal or analog for. agitator shaft 1 be constructed from a ceramic material. It may also be provided, for example in that the milling container cooled and an outer cylinder and an inner cylinder 53 is formed 54 comprises, between which a cooling space is formed 55, a suitable coolant inlet (not shown) in the coolant output (not shown) and a coolant C can be commenced. The grinding receptacle 51 further comprises a grinding container lid 58 and a milling container bottom 59.

[46]

[0046] Within the grinding vessel 51 is a stirring shaft with a longitudinal axis L 1 are disposed horizontally. The longitudinal axis L of the stirring shaft whose axis of rotation is congruent to 1 while providing the horizontal axis of the grinding container and is also arranged l50 51. The stirring shaft has a cylindrical main body with a longitudinal axis L 1 2 on, wherein on the outer surface of the cylindrical base body 2 stirring elements, in particular stirring rods, arranged and/or formed cam or grinding disks.

[47]

[0047] 1 - Portions on the agitator shaft has three part, in particular a first terminal part - section I, a second middle part and a third terminal part section III - section II - 1 with its first terminal part. the stirring shaft is a drive shaft section I with the agitator ball mill 50 - 70 connected. In the first terminal part for this purpose is for example a shaft receiving section I - 7 formed. The stirring shaft is formed as a hollow shaft 1 at least in regions, in particular the second part and the third section are - section II III and optionally partially - the first part interior regions on each section I. In particular has the second central part - section II a first hollow interior or interior region 12 and the third part - section III a second hollow interior or interior region 13 on. This also preferably have a cylindrical shape on, each longitudinal axis L of the stirring shaft whose longitudinal axis is formed congruently 1. It is further provided, in that the third part - section III in this open area a further and particularly unterminated enlarged hollow interior shows.

[48]

[0048] Can further be provided, that in the second central portion between the hollow interior region 12 - section II and the outer surface area of the stirring shaft openings are formed 5 1 15, via which the grinding body described below are recycled back into the grinding gap msec to MH.

[49]

[0049] The drive shaft 70 for the agitator shaft 1 extends through the grinding container lid 58 is connected with a drive (not shown) and through. It is for example an electric motor or the like the drive can act. The drive shaft 70 is connected for rotation with the stirring shaft 1, in particular the grinding container 51 does the end of the drive shaft 70 which projects into the first part into the shaft receiving section I 7 - 1 is further on the stirring shaft. 58 or on the milling container 51 adjacent to the grinding container lid 58 inlet (not shown) provided a grinding container lid stock, on the material to be ground into the agitator ball mill 50 is filled. In the milling container bottom 59 is a product outlet 72 provided, through which the milled product P 50 leaves the agitator ball mill.

[50]

[0050] Between the inner circumferential surface and an outer circumferential surface of the grinding container 52 51 the stirring shaft 1, especially in the area of stirring elements 3, is an annular grinding gap formed msec. In the operation of the agitator ball mill 50 located therein. g of the material to be ground by rotating driving the agitator shaft/Mahlhilfskörpergemisch 1 (not shown) is in combination with the grinding bodies in the grinding gap from the inlet side to be ground milled product outlet side and moved msec with as claimed, that it is crushed, milled particles together - for example by clash, by clash - milled particles on grinding body to MH, for enhancing the crushing effect can be provided by shear forces etc, on the inside peripheral surface 52 of the grinding container 51 that also such as cam projections, rods or the like may be arranged, on the one hand and on the other hand cause an additional mixing of the ground material/Mahlhilfskörpergemisches g of the number of collision for example grinding gap taking place in milliseconds before and thus the action of the agitator ball mill grinding progress increased 50 increase.

[51]

[0051] The product outlet 72 is formed by a so-called receiving part 75, extending through a central opening in the milling container bottom 59 extends. An additional embodiment of a receiving part 75 is in connection with the 9A to 9E described. The receiving part 75 extending coaxially inside the stirring shaft cavity at least in regions and in regions by the wear protection sleeve 1 is surrounded by 30. In particular extends coaxially within the first interior portion 12 of the receiving part 75 second central section 1 and the second interior region II to agitator shaft 13 of the third terminal part - 1 and through the milling container bottom portion II through stirring shaft 59. Within the first interior portion arranged at the end portion of the receiving part 12 75 is a separating device 40, in particular a separator screen 41 arranged, hereinafter referred to as product - that for sufficiently comminuted material referred - is permeable, but prevents, that the grinding body to the product outlet 72 reach microhenries. The separating device 40 or the separating screen 41 a passage or gap width corresponding to the desired product fineness on size. The size of the grinding media MH is selected accordingly, since they do not pass through the separation device 40 may. Grinding body are preferably selected to MH, preferably at least twice the diameter size or gap width of the separator corresponding to passage 40.

[52]

[0052] Into 5 the path of the ground material is further Mahlhilfskörpergemisches grams/within the agitator ball mill 50 described and represented. The ground material (not shown) milled commodity is inlet into the interior of the grinding container filled 51. This is already partially filled with grinding bodies microhenries, for example the interior of the container is about 80% filled with grinding bodies already grinding microhenries. By rotation of the stirring shaft and the grinding body 1 will be ground to a ground material to MH/Mahlhilfskörpergemisch G are mixed, the along the agitator shaft 1, particularly in the container 51 between the inner circumferential surface 52 of the grinding and the outer surface area 5 formed the stirring shaft grinding gap 1 msec, in a first conveying direction toward the grinding container bottom 59 fr1 is promoted. Between the open end portion of the third part and the milling container bottom portion III - 1 agitator shaft 59 is a spacer formed, in which the material to be ground is deflected Mahlhilfskörpergemisch grams /, so that in a second direction opposite the first conveying direction fr1 now this second hollow interior region of the third section 13 fr2 the III and the first hollow interior region of the second central section II 1 flows through agitator shaft 12. In particular flows through the material to be ground between the wear protection sleeve 30 g of a Mahlhilfskörpergemisch/and the inner surface of the agitator shaft formed annular space 1. Then sufficient tread grinding stock, referred to hereinafter referred to as product P, 40 by the dividing between the receiving portion and the annular space 40 75 into a separator formed a, wherein the second conveying direction fr2 maintains. The grinding body are retained by the dividing and the passages 40 microhenries against 15 the stirring shaft again returned into the grinding gap 1 msec.

[53]

[0053] The receiving part includes an axial through bore 75 77, the coaxially to the longitudinal axis L of the stirring shaft 1 and in particular the discharge passage 78 for the product P in particular forms. Within the first hollow interior portion 12 is a separating device 40, for example a separator screen 41 or another suitable device arranged on the receiving member and in particular the terminal opening of the through hole 77 75 closes at least partially. The separating device 40 is necessary, an exit of the grinding media together with the product P to prevent microhenries. Instead only sufficiently to be ground into the through-hole of the receiving part as finished product P vermahltes 77 75 72 and thus to the product outlet pass, so that it can be removed from the agitator ball mill 50. A lid 79 causes on the receiving portion 75, that product P, in the annular space between 40 and 75 is receiving part which separator, into said through hole 77 is deflected in the direction of the receiving part 75 product outlet 72. 40 By the separator, the separator screen 41 or the like retained grinding body not yet sufficiently MH and optionally milled ground material in the second middle part travel via the openings 15 - section II the stirring shaft 1 back into the grinding gap between milling container 51 and agitator 1 msec in the conveying direction and moved again fr1.

[54]

[0054] Within the second interior region 13 the stirring shaft 1 is a wear-resistant sleeve 30 arranged. In particular the wear protection sleeve 30 surrounds the receiving part 75 near the product outlet 72. It is between the inner circumferential surface of the agitator shaft 50 in the third interior region III and the outer surface of the wear-resistant sleeve 30 in turn formed an annular gap, the material to be ground in the direction toward the first hollow fr2 Mahlhilfskörpergemisch grams/interior region 12 of the second central section is guided II to. The wear protection sleeve between the cam 35 and the inner surface of the agitator shaft 50 30 in the third interior region III is especially low this annular gap. The cam 35 of the wear protection sleeve 30 serve in particular as a stripper, in order to prevent, stock and/or grinding body that the MH on the inner circumferential surface of the stirring shaft 1 adhering. Instead by the cam 35 ensured, that the milled commodity/Mahlhilfskörpergemisch g held and the openings 15 in the second section in the conveying direction flow fr2 supplied, where a return of the grinding media in the direction of the between the outer surface of the agitator shaft to MH 1 and the inner surface 52 of the grinding container 51 milling or grinding gap space formed msec takes place.

[55]

[0055] The wear protection sleeve 30 in particular has a cooling device in the form of parallel cooling channel sections 37 - 38a, 38b on, particularly in connection with the as 3 and 4 have been described. Over the inner cooling channel sections flows in a flow direction a coolant C - 38a, the second feeding direction and FR 2 within the agitator ball mill and in particular a flow from the product outlet 72 corresponds to 50 in the direction of the inlet (not shown) corresponds to be ground. The coolant K in a reversing region 39 in a flow direction in the cooling channel portion 38 b is deflected - and oppositely directed. Thus flows through the coolant K is the wear protection sleeve 30 adjacent the outer circumferential surface in a flow direction, the second direction is opposite of the millbase fr2/Mahlhilfskörpergemisches grams. This is achieved, wherein the freshly Te and thus the wear protection sleeve 30 in the coolest coolant C first agitator ball mill area including the 50 is guided, wherein the ground material/Mahlhilfskörpergemisch grams is warmest. This is particularly the area near the separator 40, after the material to be ground by the grinding material 50 g/Mahlhilfskörpergemisch agitator ball mill inlet - side has passed through, and is received by the cam 35 of the wear protection sleeve 30 diverted further is claimed. Through this counter-current cooling is an optimized cooling process within the agitator ball mill reached 50.

[56]

[0056] In 6 cross-section of the agitator ball mill 50 shows a cross-section represented in particular in the region of the third terminal part III - 1. here is to recognize agitator shaft portion, on its outer circumferential surface that the stirring shaft 1 3 5 stirring elements in the form of cam 4 has. Further within the stirring shaft 1 6 for cooling the cooling channels can also be ground and the stirring shaft 1 Mahlhilfskörpergemisches grams/be provided.

[57]

[0057] 7A to 7E a second embodiment of a wear-resistant sleeve 30 and show different representations 8A to 8E a third embodiment of a wear-resistant sleeve 30 different representations show in particular show. 7A and 8A a front view of the flange side respectively, 7B and 8B each a lateral representation, 7C and 8C a cross-section along a cutting line a-according to each 7B. 7D and 7E and 8d and 8e each show perspective representations with and without elevations 34.

[58]

[0058] In the flange 36 of the different embodiments of the wear-resistant sleeve 30 are each a coolant inlet 45 formed, via which the cooling device 37 is supplied coolant. A coolant output 46 is further formed, via which the coolant from the cooling device 37 of the wear protection sleeve 30 is discharged again. The cooling device cooling channel sections 48 - 1 to 48 - 8 - 37 provides the meandering in particular before. 48 - 1 To 48 - 8 the cooling channel sections extend substantially parallel to the longitudinal axis of the wear-resistant sleeve each particular l30 30, wherein each deflection region 49 is provided in the end regions, the two adjacent cooling channel sections 48 interconnects. 48 - 1 To 48 - 8 - the cooling channel sections each have a same radial distance from the longitudinal axis of the wear-resistant sleeve 30 to the by a48 l30 defined center point on.

[59]

[0059] The coolant via the coolant inlet 45 is in the first cooling channel portion in a first flow direction through this 48 - 1 and introduced in the end region of the wear protection sleeve 30. sr1, opposite the flange 36, is a deflection area between the first cooling channel portion and the second cooling channel 49 - 48 - 2 formed portion 48 - 1, the two cooling channel sections 48 - 1 -, interconnecting 48 - 2. The coolant flows through the second cooling channel is diverted and 48 - 2 in a second flow direction opposite the first direction of flow - portion adjacent the flange 36. sr1 sr2 deflection portion between the second cooling channel portion 49 is another - 48 - 2 and the third cooling duct section 48 - 3 - formed, the two cooling channel sections 48 - 2 -, interconnecting 48 - 3. The coolant flows through the third cooling passage is diverted and 48 - 3 - section in the first flow direction after flowing through the cooling channel section 48 - 8 in the last sr1 etc. sr2 coolant leaves the second flow direction through the coolant output 46 . 37 the cooling device by the meander-shaped portions 48 - 1 to 48 - 8 - arrangement the cooling channel is formed a large cooling surface and an optimal cooling of the agitator ball mill outlet in the region of the product obtained. In particular is provided, that in the milling container bottom (comparisons 5) Openings are provided, their arrangement with said array of coolant inlet and coolant outlet 46 of the wear protection sleeve 45 30 correspond, so that respective coolant inlet and discharges preferably at the milling container bottom - - arranged and/or are fixed.

[60]

[0060] 9A to 9E a receiving part with product outlet 72 75 different representations show in particular shows. 9A a perspective representation and 9B a longitudinal section through a perspective representation, 9C shows a top view, 9D shows a lateral representation and 9E a cross section through a lateral representation.

[61]

[0061] The receiving part has a cylindrical body 76 and a longitudinal axis substantially 75 l75 on. A through bore extending coaxially to the longitudinal axis l75 77, 78 forms a discharge channel for the product P in particular. The illustrated embodiment of the receiving part 75 is formed here, that it together with a suitable wear protection sleeve (not shown, comparisons 10) forms a cooling system. This is especially provided, that the receiving part 75 a coolant inlet and a coolant outlet 81 80 has, accordingly can be discharged to the coolant - and. The receiving portion further has an open external thread 82 on 75 in regions, via at least one first connecting portion 83 with the coolant that suitable input 80 is connected. The external thread 82 has in particular recesses on 86, which extend helically around the receiving part 75 and to form outer cooling channels (comparisons 10) and/or provided are suitable. The receiving part has at least one internal cooling passage 85 75 further on, in the coolant through said coolant inlet and a first connecting portion in the direction of the external thread 82 and 83 introduced is supplied. The external thread 82 via at least one second connection portion 84 is suitable with the open outlet refrigerant connected 81.

[62]

[0062] 10 shows a longitudinal section through an agitator ball mill 50 with a receiving part 75 in compliance with the 9A to 9E embodiment described. The agitator ball mill 50 according to 10 in their essential components of the agitator ball mill 50 according to corresponding 5, referred to the corresponding description why. In addition 10 a coolant inlet 56 formed on the grinding container 51 represented, on the coolant in the cooling space between the inner cylinder 54 and 55 K is said outer cylinder 56 for cooling of the grinding container 51 can be introduced. The coolant flows through the cooling chamber in a flow direction 55 preferably K is, opposite to the first conveying direction of the material to be ground within the agitator ball mill/fr1 Mahlhilfskörpergemisches g of 50 and 57 is formed on the outlet refrigerant discharged again.

[63]

[0063] In further 10 represented, that on the outer surface of the agitator shaft 5 are formed in the form of cam 4 1 3 stirring elements, the extending radially outward. The agitator shaft 1 can also be further cooled. For this purpose the agitator shaft 1 can have cooling channels 6, but on the under this application has not be enlarged.

[64]

[0064] On the grinding container lid 58 is the ground material inlet 71 formed, the material to be ground on the agitator ball mill is filled m 50.

[65]

[0065] The stirring shaft 1 is as already mentioned in connection with 5 describe internal hollow part, in particular an inner cavity extending from the open end of the third part by the third part of Section III - from - the second part - section II and section III.

[66]

[0066] Within the cavity is arranged coaxially to the longitudinal axis L of the stirring shaft 75 the receiving part 1. The end portion of the receiving part 75 with the product outlet 72, in connection with the 9A to 9E 80 described coolant inlet, the coolant outlet 81 and the open external thread 82 has in particular for milling container bottom extending partially through the milling container bottom 59 59 or towards the opposite end portion of the receiving part is 75. first interior region within the second section 12 in II arranged agitator shaft 1. In particular in this area is at least partially covers the through bore 77 by a separating device 40, which prevents, that the grinding body MH is in the outlet channel 78 and thereby enter product outlet 72. The product P flows through the outlet channel 78 in a first conveying direction of corresponding flow direction and leaves the agitator ball mill 50 on the fr1 product outlet 72.

[67]

[0067] 75 On the region of the receiving part, said external thread 82 has, a wear protection sleeve sealingly seated on 30. 75 86 Between the recesses of the receiving part and the inner surface of the wear protection sleeve 30 are so-called outer cooling channels formed in 87. The assembly consisting of a receiving part 75 and a wear protection sleeve 30 thus forms a cooling system disposed thereon, wherein the inner cooling channels between 75 and 85 and 75 in the receiving part receiving part wear protection sleeve 87 30 outer cooling channels for cooling within the agitator ball mill 50 are formed. The coolant on the coolant inlet 80 into the receiving part 75 K is initiated and this from the product outlet side in the direction of the ground material flows through inlet side. In the region of the second partial section II - 1 agitator shaft is deflected and flows through the coolant K is now in the opposite direction this 75 within the box. Via the first connecting portion 83 is the coolant flows through the external thread 82 and guided by the recesses for C towards the wear protection sleeve 30 86 and 87 formed outer cooling channels, wherein the coolant is passed helically around the receiving part 75 K is, via the second connecting portion 84 and the outlet refrigerant before it 81 50 exit from the agitator ball mill. The cooling system serves in particular the cooling of the product during passage through the outlet duct 78 and exits the para agitator ball mill 50 on the product outlet 72.

[68]

[0068] Alternative (not shown) can be provided, that the at least one cooling passage within the wear protection sleeve at least partially helically about the longitudinal axis of the wear-resistant sleeve is designed to extend. The coolant flows through the cooling passage and will helically about the longitudinal axis around the wear protection sleeve. The flow direction of the coolant in the cooling channel - a movement component in the first portion can be helical or have a movement component in the second flow direction of flow. For example takes place analogously to the coolant guide 10, that the cooling channel is formed only within the wear protection sleeve and not by the cooperation of wear protection sleeve and receiving part is formed.

[69]

[0069] 11 shows a partial cut out the outside of a wear-resistant sleeve 30 in this context on the shape of the elevations 34 closer. should be entered into. As already described, the wear protection sleeve 30 is produced in one piece, in particular in the production of the wear protection sleeve 34 are the elevations 30 formed directly and not subsequently fastened. The elevations of the cylindrical base body 34 are in particular as the wear protection sleeve 22 30 35 projecting cams formed. The base body of the wear protection sleeve 32 formed 60 the cam 35 is formed relatively large connecting surface 30, in particular in relation to the shape of the cam 35 . 35 radial height H of the cam can both accept any geometric shape in axial section and in radial viewing, for example trapezoidal, with rounded corners, with chamfered edges 60 corresponds in particular to a base of each cam 35 etc said connecting surface and believes that surface, with each cam 35 in contact with the outer surface of the wear-resistant sleeve is 30.

[70]

[0070] By the shape which is made from a ceramic to break out from the cam 35 - or significantly reduced sensitivity. The integral execution of the wear protection sleeve 30 promotes both stability and heat conduction, since potential breaking points and heat conduction barrier omitted.

[71]

[0071] It is advantageous for example, if each cam 35 a connecting surface 60 for wear protection sleeve 30 with a maximum width b and the ratio of the height H of each cam 4 normal to the wear protection sleeve 30 and the largest width b is greater than 0.2. A connecting surface for wear protection sleeve 60 may further each cam 35 30 having a longest length l35 have, wherein the ratio of the height H of each cam 35 and the greatest length is preferably less than 1 l35. According to a further embodiment it is advantageous, if each cam 35 a connecting surface 60 for wear protection sleeve 30 with a maximum length and a maximum width b l35, wherein the ratio of the largest width b and the greatest length is less than 1 l35.

[72]

[0072] It is advantageous in principle, a plurality of cam 35 on the wear protection sleeve to provide 30. The wear protection sleeve 30 can also have this cam-free regions, or may in some areas and in other areas have more cam 35 less cam 35. Also need not be identical design cam 35, but can be arranged in different shapes and sizes in different areas.

[73]

[0073] Such as in particular on the basis of the 2 is clear, it may be advantageous, in the circumferential direction of the main body 32 of the wear protection sleeve 30 more cam 35 along a circumferential line of the main body 101 in a row 32 of the wear protection sleeve 30 to be successively. For example can be a distance between successive cam 35 a row circumferentially equal to or greater than the maximum length of a cam 35 be constructed l35 circumferentially.

[74]

[0074] Are a plurality of cam 35 axially spaced apart circumferential lines in a row along a plurality each consecutively 101, then an axial distance between each two axially adjacent cam rows is advantageously greater than or equal to 1.1 times the largest width b of a cam 35. the cam 35 when axially spaced apart on the base 32 of the wear protection sleeve 30 are formed, then cam axially aligned in rows 35 can also be either 100 or offset from one another.

[75]

[0075] The embodiments, examples and variants of the preceding paragraphs, the claims or the following description and the Figures, including their different views or respective individual characteristics, can be used independently or in any combination. Features, are described in connection with one embodiment, are applicable for all embodiments, provided that the features are not incompatible.

[76]

[0076] Although in general "schematic" representations and views of Figures of talk, is not meant to, and their description as regards the disclosure of the invention that the character representations should be of secondary importance. The expert is perfectly able, from the abstract representations of information shown schematically and subscribed enough, the understanding of the invention facilitate him, without about from the subscribed may not scale and the relative sizes of the piece goods and/or exactly fair or other parts of the device in any way compromised in its understanding of unsigned elements. The Figures thus allow the reader to the technician, explained on the basis of the concrete according to the invention and the functioning of the device according to the invention specific reactions described in claims and a better understanding of the general part of the description and/or in general abstract idea formulated invention derive.

[77]

[0077] The invention was described with reference to a preferred embodiment. But it is conceivable for an expert, that modifications or changes can be made of the invention, the protection scope of the following claims without leaving.

List of reference symbols

[78]

1
Agitator shaft
2
cylindrical base body
3
Stirring element
4
Cam
5
Outer surface
6
Cooling channel
7
Shaft receiving
12
first interior region
13
second interior region
15
Opening
30
Wear protection sleeve
32
cylindrical base body
33
Hollow cylinder
34
Survey
35
Cam
36
Flange; fastening flange
37
Cooling device
38a
(inner) - cooling channel portion
38b
(outer) - cooling channel portion
39
Deflection region
40
Separator
41
Separating wire
45
Kühlmittteleingang
46
Coolant output
48, 48 - 1 to 48 - 8
- Cooling channel portion
49
Deflection region
50
Agitator ball mill
51
Grinding container
52
Inner circumferential surface
53
Outer cylinder
54
Inner cylinder
55
Cooling chamber
56
Coolant inlet
57
Coolant output
58
Grinding container lid
59
Milling container bottom
60
Connecting surface
70
Drive shaft
71
Ground material inlet
72
Product outlet
75
Receiving part
76
cylindrical base body
77
Through hole
78
Outlet channel
79
Lid
80
Coolant inlet
81
Coolant output
82
open external thread
83
first connecting portion
84
second connecting portion
85
internal cooling channel
86
Recess
87
outer cooling channel
100
Row
101
Periphery
A48
radial distance
B IS
Width
d30
Outer diameter wear protection sleeve
FR1
first conveying direction
FR2
second conveying direction
GRAMS
Stock/Mahlhilfskörpergemisch
is H
radial height of the cam
I IS
first terminal part - section
II TO
second central part - section
III TO
third terminal part - section
C
Coolant
I
Longitudinal axis of the agitator shaft
L30
The wear protection sleeve longitudinal axis
L35
Length cam
L50
The axis of the agitator ball mill grinding receptacle
L75
Receiving longitudinal axis
M IS
Stock
THE MH
Grinding body
MSEC
Grinding gap
PARA
Product
R IS
Radial
SR1
first flow direction
SR2
second flow direction

CONTAINED IN THE DESCRIPTION QUOTES

[79]

This list of documents produced by the applicant and is exclusively for better information of the listed was automated reader received. The list is not part of the German utility model application - or patents. The DPMA any liability for any errors or omissions takes over.

Patent literature cited

[80]

  • [0006]ADE 36147 A1
  • WO 2007/042059 A1
  • [0007]THEDE 3614721 A1
  • [0007]THEDE 3015631 A1



[81]

The invention relates to a stirred ball mill with a horizontal or vertical axis extending along a grinding container, a ground material inlet and a product outlet, a within the grinding container about the vertical or horizontal axis rotatable agitator shaft having stirring elements, wherein the stirring shaft is associated with a wear protection sleeve in the region of the product outlet. The wear protection sleeve is integrally formed, on an outer circumferential surface and comprises at least one has elevations forms part of a cooling device or cooling system. Further the invention relates to a wear-resistant sleeve for a stirred ball mill and a process for producing a corresponding Verschleißschlseutzhü



1. Agitator ball mill (50) along a horizontal or vertical axis with a (l50) extending grinding vessel (51), a ground material inlet (71) and a product outlet (72), a within the grinding vessel (51) about the horizontal or vertical axis (l50) rotatable agitator shaft (1) with stirring elements (3), wherein the stirring shaft (1) in the region of the product outlet (72) a wear protection sleeve (30) is associated with, wherein the wear protection sleeve (30) is constructed in one piece, wherein the wear protection sleeve (30) is a part made in 3d - pressure, the consists of a ceramic material.

2. Agitator ball mill (50) according to Claim 1 , wherein the wear protection sleeve (30) on an outer circumferential surface elevations (34) and wherein the wear protection sleeve (30) at least one cooling device (37) comprises or forms part of a cooling system.

3. Agitator ball mill (50) according to Claim 1 or 2 , wherein the agitator shaft (1) on the product outlet (72) side facing at least partially an internal cavity (13) and in particular wherein the agitator shaft (1) at the end, the product outlet (72) is facing, to the internal cavity (13) is formed open, wherein the wear protection sleeve (30) at least partially within the internal cavity (13) the stirring shaft (1) is arranged.

4. Agitator ball mill (50) according to any of the preceding claims, wherein the wear protection sleeve (30) and/or to a mounting device for mounting within the agitator ball mill (50) comprises, in particular a flange (36) for securing the wear protection sleeve (30) on a milling container bottom (59) of the agitator ball mill (50)

5. Agitator ball mill (50) according to any of the preceding claims, wherein the cooling means (37) of the wear-resistant sleeve (30) is formed as at least one cooling channel, preferably extending at least partially parallel to the longitudinal axis (l30) the wear protection sleeve (30) extends.

6. Agitator ball mill (50) according to Claim 5 , wherein the at least one cooling channel in at least two regions are each parallel to the longitudinal axis (l30) the wear protection sleeve (30) extends, wherein a deflecting region is formed between the two parallel areas, in particular wherein a coolant the at least two interconnected areas in opposite flow directions via a deflection region flows through.

7. Agitator ball mill (50) according to Claim 6 , wherein the at least one cooling channel meandering cooling channel - sections (48) comprises at least one cooling channel or wherein the at least partially helically about the longitudinal axis (l30) the wear protection sleeve (30) is designed to extend.

8. Agitator ball mill (50) according to Claim 6 , wherein the two parallel regions on a radial (R is) between the longitudinal axis (l30) and an outer periphery of the wear-resistant sleeve (30) are arranged.

9. Agitator ball mill (50) according to any of the preceding claims, wherein the product outlet (72) is formed by a receiving part, the region-wise within the stirring shaft and being located by a milling container bottom (59) of the agitator ball mill (50) extends.

10. Agitator ball mill (50) according to Claim 9 , wherein the receiving part at least partially in the inner cavity of the stirring shaft (1) is arranged, and wherein at an end portion of the receiving part or a separator (40) for retaining the grinding body is arranged at the opposite end and wherein the wear (microhenries) protection sleeve (30) is arranged.

11. Agitator ball mill (50) according to Claim 10 , wherein the receiving part has at least one profiling, the operatively associated with the wear protection sleeve (30) forms a cooling system.

12. Wear protection sleeve (30) for a stirred ball mill (50), the integrally formed, on an outer circumferential surface elevations (34) and at least one cooling device (34) comprises part of a cooling system or forms.

13. Wear protection sleeve (30) according to Claim 12 for a stirred ball mill (50) according to one of Claims 1 to 11 .

14. Method for producing a wear-resistant sleeve (30) for a stirred ball mill (50), wherein the wear protection sleeve (30) on an outer circumferential surface elevations (34) comprises, at least one cooling device (37) comprises or forms part of a cooling system and wherein the wear protection sleeve (30) is made in one piece from a ceramic material.

15. The method Claim 14 for producing a wear-resistant sleeve (30) for a stirred ball mill (50) according to one of Claims 1 to 11 , in particular wherein the wear protection sleeve (30) is made of a ceramic material by means 3d - pressure.