AU2006289305A1

AU2006289305A1 - Coke oven operating device for cleaning an oven door stop

Info

Publication number: AU2006289305A1
Application number: AU2006289305A
Authority: AU
Inventors: Kurt Rinke
Original assignee: Schalker Eisenhuette Maschinenfabrik GmbH
Current assignee: Schalker Eisenhuette Maschinenfabrik GmbH
Priority date: 2005-09-09
Filing date: 2006-09-06
Publication date: 2007-03-15
Also published as: KR20080045257A; DE202006020545U1; DE102005043226B3; DE502006003683D1; EP1943324B1; DE102005043226C5; EP2000521A3; ZA200802978B; ATE430790T1; WO2007028589A1; EP1943324A1; JP2008527097A; EP2000521A2

Abstract

A device for cleaning coke oven door jambs, comprising milling cutters (5) mounted on a carriage (6) that moves along guides on a frame (7), comprises a device for centering the door and/or fixing it in the frame between the cutters so that the carriage and cutters can move longitudinally along the sides of the jamb. An independent claim is also included for a coke oven with a door jamb cleaner as above.

Description

Aldridge & Co Ltd ' a., PATENT, LEGAL, & TECHNICALTRANSLATIONS W NEW ZEALAND Wellington. NEW ZEALAND From:- Te e 44 478-2955 Danish, Dutch. Esperanto, Flemish, French, German. Facsimile: 64 4) 478-295 Italian, Nonwegslan, Portuguese, Spanish, Swedish... E-mail: aco paadlse.net.nz William R. Aldddge Glillan M. Akdridge Hielne Thursday, 13 March 2008 My ref CallinansKN/Trl738 I, WILLIAM RUPERT ALDRIDGE, MA Hons, ATCL, Dip. Tchg., FNZEA, DBFA, NAATI III, Consulting Linguist & Translator of Wellington, New Zealand, HEREBY CERTIFY that I am acquainted with the German and English languages, and am a competent translator from German to English, and I FURTHER CERTIFY that, to the best of my knowledge, ability, and belief, the attached translation, made by me, is a true and correct translation of PCT/EP2006/008680 (WO2007/028589) As WrrITNeSS MY HAND AND SEAL 13 MAR 2004 Translation from German WO 2007/028589 PCT/EP2006/008680 (Official English Title:I Coke Oven Operating Device for Cleaning an Oven Door Stop* The invention relates to a coke-oven servicing device according to the generic part of claim 1. s The coking chambers of a coking oven are closed off at their mutually-opposite openings situated on the pusher-machine side and the coke-guide-machine side of the coke-oven - in each case by means of a door hung on supports. Facing into the coking chamber, there extends, over the entire height of the door, a door-plug made of temperature-resistant material, e.g. stoneware. When the oven is in operation, this to door-plug projects into the oven chamber, and stops oven-filling at a certain distance from the door's body. The purpose of such plugs is to protect the metal parts of the oven-door from the effects of direct heat, and thereby, inter alia, to prevent deposits forming on the door. Coke-oven gas components, e.g. tar, are deposited on the door plug, and are partly is cracked due to the effect of heat. It is therefore necessary to clean the door-plug, to ensure trouble-free operation. DE 37 35 527 discloses a coke-oven servicing device, of the type mentioned initially, for cleaning the door-plug. This prior-art coke-oven servicing device has a stationary holding device for supporting the oven door and fixing it in place. The stationary holding-device is arranged on a base. Face-milling o20 cutters are provided for cleaning the door-plug of the oven door. They are mounted on a tool carriage, and the tool carriage is arranged on guides on a carriage frame, so as to be movable in the door-plug's longitudinal direction. The carriage-frame is likewise arranged on a base. Normally "Door Plug" in English-Translator's note. Confirmation Copy 2 WO 2007/028589 PCT/EP2006/008680 A drawback of this prior-art coke-oven servicing device is the fact that, to clean the door-plug, the carriage-frame for the tool-carriage bearing the face-milling cutters, and the holding device for holding the oven-door and fixing it in place, have to be aligned exactly to each other, in order to be able to remove the coke-oven gas s components to an adequate extent. In this regard, it must be ensured that the door plug cannot get damaged during the abrasion of the coke-oven gas components. Accurate positioning of the carriage frame relative to the door-plug is complicated to achieve with the prior-art coke-oven servicing device. During positioning, it is, moreover, necessary to have regard to vibrations of the face-milling cutters that can occur during /o the cleaning-operation. Therefore, with the prior-art coke-oven servicing device, accurate positioning is very time-consuming. Furthermore, the design of the prior-art coke-oven servicing device is complex and is characterised by having a great many parts. If the carriage-frame is not accurately positioned relative to the holding-device for the door-plug, the possibility of damage to the door-plug during the is cleaning-operation, and/or inadequate abrasion of deposits, cannot be excluded. The objective of the present invention is to provide a coke-oven servicing device, of the type mentioned initially, that enables the door-plug of an oven door to be cleaned easily with a very good cleaning-result, without it being possible to damage the oven-door, and that is of simple construction, with only a small number of parts. 20 This objective is achieved with a coke-oven servicing device having the characterising features of claim 1. The basic concept of the invention is to provide a holding-device to bear the carrying-frame, and also to bear the oven-door and fix it in place. This significantly simplifies the positioning of the carrying-frame, with the face-milling device on it, relative to an oven-door installed in the holding frame. In 2i addition, the inventive coke-oven servicing device is of simple construction, with only a small number of parts, thereby leading to lower fabricating costs and reduced maintenance for the coke-oven servicing device. Preferably, a plurality of milling-devices is provided, particularly two, arranged opposite each other on the carrying-frame, to clean both side-surfaces of the o30 door-plug simultaneously. This considerably reduces the time required for the cleaning-operation. In principle, it is, however, also possible to provide only one 3 WO 2007/028589 PCT/EP2006/008680 milling-device, and to clean the door-plug's side-surfaces one after the other. The milling-device can have face-milling cutters or, if desired, plain milling cutters also. The holding-frame has an insertion-side with an insertion region for the insertion of the oven-door. The oven door is insertable with its door-plug side in the 5 insertion-region, and the holding-frame's means for centering the door and/or fixing the oven-door in place, e.g. latch hooks, are provided on the insertion-side of the holding-frame. The size of the insertion-region is at least such as to enable the oven-door to be inserted into the holding-frame. The door-centering means and/or oven-door fixing means are preferably arranged in such a way that when the to oven-door is being inserted into the holding-frame, door-centering and oven-door fastening occur automatically, as soon as the oven-door and door-plug have assumed a cleaning-position within the holding-frame. This will now be further explained. The insertion-side of the holding-frame can be oriented towards a coke-oven coke-pushing machine and/or a coke-guide machine. This makes it possible, in a 15 simple manner, to remove the oven door from its seat in a coking-chamber door opening and insert it into the holding-frame, by means of a door-lifting device-preferably, one provided on the coke-pushing machine and/or on the coke-guide machine. In principle, it is, of course, also possible for the holding-frame to be positioned or rotated at an angle of 900, at maximum, to the 20 coke-pushing-machine side and/or to coke-guide-machine side. In this case, it is necessary to suitably swivel the oven-door after lifting it out, in order to be able to insert the oven-door into the holding-frame. The arrangement of the door-centering means and/or means for securing the oven-door in the holding frame preferably corresponds essentially to the arrangement 25 of the door-centering and oven-door fastening means on a coking chamber. The arrangement of the holding-frame as such and the arrangement of the latch hooks and centering-means of the holding frame preferably correspond to the arrangement of latch hooks and centering-means in the region of the buckstays of the coking chambers, so that the manner in which the oven-door is inserted and latched in a 30 coking chamber, and in the holding-frame, is the same.

4 WO 2007/028589 PCT/EP2006/008680 In a preferred form of embodiment of the coke-oven servicing device of the present invention, the holding-frame has a plurality of neighbouring longitudinal bearers, arranged essentially parallel to one another, and the carrying-frame can be guided and moved on rollers, along at least two longitudinal bearers. The longitudinal bearers s make the holding-frame highly stable - which is necessary, in order to place and secure the oven-door in the holding-frame. The roller-guidance of the carrying-frame makes it possible to move the carrying-frame back and forth in the holding-frame, along the longitudinal bearers, with little effort. Preferably, the longitudinal bearers run essentially vertically, parallel to a side-wall of o/0 the coke oven. The holding-frame is essentially arranged standing upright, next to a side-wall of the coke oven, and the carrying-frame is moved vertically along the side-surfaces of a door-plug inserted into the holding-frame. In this regard, the arrangement of the holding-frame can correspond to the arrangement of buckstays of the coke oven, thereby facilitating insertion of an oven-door into the holding-frame. 15is To ensure that the holding-frame is sufficiently stable, the insertion-region is bounded by two neighbouring longitudinal bearers, and the oven-door is inserted into the region between these neighbouring longitudinal bearers. In addition, it is fundamentally also possible for the inventive coke-oven servicing device to be arranged on a coke-oven servicing machine and to be moved together with the latter. 20 To further increase the stability of the holding-frame, the holding-frame can have an n-angular cross-section in the longitudinal direction, preferably a quadrangular cross-section. Preferably at least one longitudinal bearer is provided at each corner of the holding-frame. If the holding-frame has a quadrangular cross-section, four longitudinal bearers can be provided, one at each vertex. 25 To reduce the stress on the carrying-frame and roller-guidance, it can be arranged that the carrying-frame is moved, and guided, along all the longitudinal bearers of the holding-frame. If the carrying-frame has an n-angular cross-section, then preferably, according to the invention, the carrying-frame is moved and guided along at least all the longitudinal bearers provided at the vertices. In this regard, the carrying-frame can 30 have a number of rollers, corresponding to the holding-frame's number of longitudinal bearers, with each roller rolling along on a rolling-region of a longitudinal bearer when the carrying-frame is moving.

5 WO 2007/028589 PCT/EP2006/008680 The holding-frame can have a door-plug cleaning region arranged preferably between the longitudinal bearers. The cleaning region is adjacent to the insertion-region of the holding-frame, with the length and width of the cleaning-region at least enabling the door-plug to be inserted into the cleaning region and cleaned. During the insertion 5 operation, the oven door is inserted, door-plug first, through the insertion-region and into the holding frame, with the door-plug coming to be positioned in the cleaning region. As has already been mentioned, the holding-frame has oven-door-centering means such that the door-plug assumes a pre-set position in the cleaning region. Then, the oven door is fixed in place by the oven-door securing-means provided on the io holding-frame. In the holding-frame's longitudinal direction, the carrying-frame can have an essentially U-shaped cross-section, with the open side of the carrying-frame being oriented towards the insertion-side of the holding-frame. As a result, the carrying-frame does not oppose the insertion of the door into the holding-frame. is Preferably, the carrying-frame is in the form of a trolley-car and the holding-frame is in the form of a travelling-frame; and when the carrying-frame is travelling, rollers on the carrying-frame roll on rolling-regions of the longitudinal bearers. In principle, it is of course also possible for the carrying-frame to be in the form of a tool-carriage, with guide-sections of the longitudinal bearers enabling the tool-carriage to be guided and 20 slid thereon. To ensure that the carrying-frame is highly stable, the carrying-frame can have at least two lateral bars, and at least one transverse bar connecting the lateral bars to each other. To further increase the stability of the carrying-frame, the carrying-frame can, according to the present invention, be designed as a cage, open on one side, with a 25 plurality of lateral bars and thereto-connected transverse bars and horizontal bars. As has already been mentioned, two milling-devices can be provided, to clean both side-surfaces of the door-plug simultaneously in one cleaning-operation. The milling-devices can be arranged opposite one another on the carrying-frame. This makes it possible to easily clean both longitudinal sides of the door-plug 30so simultaneously as the carrying-frame travels along the longitudinal side of the holding-frame.

6 WO 2007/028589 PCT/EP2006/008680 The position of the milling-device is preferably adapted to the inclination of the side-wall of the door-plug. Preferably, the position of the milling-device is adjustable to various angles of inclination so that it is possible, with a coke-oven servicing device of the kind disclosed in the present invention, to clean door-plugs with 5 side-walls inclined at different angles. Fundamentally, it is however also possible to provide a different coke-oven servicing device for each door-plug shape, with its milling-device set for the angle of inclination of the side-wall of the door-plug. A control-device can be provided for controlling the advancement of the milling-device relative to the door-plug. This control-device can have a suitable /o sensor system, in order to move the milling-device forward in given steps, starting from an off position and moving towards the side-wall or base surface of the door-plug. The control device is coupled to a drive-unit, which advances the milling-device. For example, the milling-device can be mounted on a tool-carriage moved by a hydraulic cylinder. In a particularly simple form of embodiment, the i5 cutting-depths can be set by means of filling-plates. To reduce the stress on the milling-device, it can be provided, according to the invention, that at each cleaning stroke, i.e. at each movement of the milling-device along the side-surface or base-surface of the door-plug, removal of less than 5 mm, preferably from 2 mm to 3 mm will occur. The number of cleaning-strokes required 20 depends on the degree of fouling of the door-plug. As a rule, however, not all of the deposited components are removed from the door-plug, so as to be sure of not damaging the door-plug during the cleaning-operation. In order to be able to move the milling-device to and fro along the side-surfaces of the door-plug, or along the door-plug's base surface, during the cleaning-operation, the 25 holding-frame has a device for moving the carriage-frame. For instance, a chain conveyor device with a chain-conveyor drive can be provided. To enable the completest possible cleaning of the door-plug, at least one additional milling-device, arranged so as to be movable essentially transversely to the holding-frame, can be provided for cleaning the base surface of the door-plug.

7 WO 2007/028589 PCT/EP2006/008680 During the door-plug cleaning operation, the deposits that have formed on the door-plug during the coking operation are removed by abrasion. This results in emissions which can bother, and endanger the health of, people staying in the vicinity of the coke-oven servicing device. Therefore, according to the present invention, the s coke-oven servicing device is preferably enclosed so as to essentially shut it off entirely from the environment, at least during the cleaning-operation. To exhaust the emissions by suction, the housing is connected to a suction device. This prevents annoyance and endangerment of persons staying in the area around the inventive coke-oven servicing machine during the door-plug cleaning operation. o/0 A housing surrounding the holding-frame has an opening on the insertion-side of the holding-frame, making it possible to insert the door into the holding-frame. The side-walls of the housing are preferably connected in a sealed manner to the holding-frame's longitudinal bearers bounding the insertion-region. To close the insertion-region during the cleaning-operation, it is possible to provide a section of 5is the housing that is swivellable and/or movable. Of course, suitable sealing-means, e.g. spring plates, can be provided in order to seal off the insertion-region essentially completely from the environment during the cleaning-operation. The inventive coke-oven servicing device can be provided on the coke-pushing-machine side of the coke-oven, and/or on the coke-guide-machine side 20 of the coke oven, for the purpose of cleaning the coke-oven door plug. Preferably, coke-oven servicing devices according to the present invention are provided on both sides of the coke oven. They can be arranged beside the coking chambers, and can be connected to a side-wall and/or bottom of the coke oven. In a preferred form of embodiment of the invention, the holding-frame is arranged standing essentially 25 upright next to the side-wall of the coke oven, with the longitudinal bearers of the holding-frame being connected, by suitable anchoring means, to the bottom of the coke oven. At the other end of the holding-frame, the longitudinal bearers of the holding-frame can be connected, by transverse bearers, to the side-wall of the coke oven, providing stable connection of the holding-frame to the coke oven. 30so If coke-oven servicing devices of the type according to the present invention are provided on both sides of the coke oven, then a common housing can be provided, essentially sealing the coke-oven servicing devices off entirely from the environment 8 WO 2007/028589 PCT/EP2006/008680 - at least during the door-plug cleaning operation - and serving for exhausting the emissions released during door-plug cleaning. The common housing can run essentially the entire width of the coke-oven, from the coke-pushing-machine side to the coke-guide-machine side. The common housing ensures that - in association 5 with door-plug cleaning - no harmful substances can get out of the cleaning region and into the environment. In addition to the common housing, each coke-oven servicing device can likewise be enclosed in its own housing, according to the invention. This double housing of the coke-oven servicing devices ensures that no there is no risk that any emissions /o released during the cleaning-operation may get into the environment - not even if the "inner" housing or the common housing has to be opened during the door-plug cleaning operation, e.g. due to a fault occurring. In particular, it is possible for the cokery's servicing personnel to open the inner housing of a coke-oven servicing device during a cleaning operation, in order, for instance, to be able to perform any Is necessary repair work. A suction exhausting device can be provided for each coke-oven servicing device, and can be connected to a manifold line. The emissions released during the door-plug cleaning operation can then be exhausted through the manifold line. A door lifting device on the coke-pushing machine and/or the coke-guide machine 20 can be provided for inserting and removing the oven door, into and from the door-opening of the coking chamber, and for inserting and removing the oven door, into and from the holding frame. This simplifies the oven-door cleaning operation. The invention also basically allows for the provision, if required, of a door-lifting device that is movable in the coke-oven's longitudinal direction, independently of the 25 coke-oven servicing machines. Going into more detail, there are numerous possibilities for implementing and further developing the coke-oven servicing device according to the present invention, for which, see the dependent claims and the following detailed description of a preferred embodiment of the invention, illustrated in the drawings, in which: 30 Figure 1 is a cross-sectional view of one form of embodiment of a coke-oven servicing device according to the invention, viewed from behind; 9 WO 2007/028589 PCT/EP2006/008680 Figure 2 is a cross-sectional view of the coke-oven servicing device in Figure 1, viewed from above; Figure 3 is another form of embodiment of a coke-oven servicing device according to the invention, with a milling-device for cleaning the base surface of a stoneware plug; and Figure 4 is a diagrammatic top view of a coke oven with two coke-oven servicing devices. Figure 1 shows a coke-oven servicing device I according to the invention, for cleaning the door-plug 2 of an oven door 3 of a coking chamber (not shown to specifically) of a coke oven 4 having a number of coking chambers arranged next to one another. Figure 1 shows the coke-oven servicing device 1 from behind, i.e. looking at an oven door 3 inserted into the coke-oven servicing device 1. The oven door 3 is inserted into the coke-oven servicing device 1, on an insertion side of a coke-oven servicing machine (not shown). The coke-oven servicing device I has two 15 milling devices 5, which are mounted movably on a carrying-frame 6 that is movable along a guide. A holding frame 7, particularly a stationary one, is provided for moving the carrying-frame 6 upon, the carrying-frame 6 being guided and movable along longitudinal bearers 8 of the holding frame 7. In addition, the holding frame 7 has 20 latching hooks 9, which cooperate with a latch 10 on the oven door 3, to fasten the oven door 3 in the holding frame 7. The holding frame 7 has, in addition, door-centering means 11. The holding frame 7 is anchored to the bottom of the coke oven 4 by a transverse bearer 12, and is connected to a side-wall 14 of the coke oven 4 by another transverse 25 bearer 13. To adjust the height of the carrying frame 6, a chain-conveyor device is provided which has a chain conveyor drive 15, a driving chain 16, and return sheaves 17 mounted on the upper transverse bearer 13 of the holding frame 7. The driving chains 16 are connected to the carrying frame 6 and, over the return sheaves 17, to driving sprockets 18 of the chain conveyor drive 15. Hydraulic motors 19 are 30 provided, to set the forward-feed movement of the milling devices 5.

10 WO 2007/028589 PCT/EP2006/008680 As shown in Figure 2, the holding frame 7 has, in the longitudinal direction, a rectangular cross-section, with a longitudinal bearer 8 at each corner of the holding frame 7. The carrying frame 6 is guided and movable along all the longitudinal bearers 8 of the holding frame 7. The carrying frame 6 has an essentially U-shaped 5 cross-section, with lateral bars 20, and a transverse bar 21 connecting the lateral bars 20 to each other. The lateral bars 20 and the transverse bar 21 form a lower support-segment of the carrying frame 6. A similar upper support-segment of the carrying frame 6, whose transverse bearer 21 is shown in Figure 1, is connected to the lower support-segment by horizontal bars 22. The carrying frame 6 is in the form of a /0 cage, open on one side, with a plurality of lateral bars 20, transverse bars 21, and horizontal bars 22. As can be seen particularly in Figure 2, the carrying frame 6 is guided and movable along the longitudinal bearers 8 by means of rollers 23. The longitudinal bearers 8 can have wearing-rails for guiding the rollers 23. In principle, however, it is also possible is for the carrying frame 6 to be guided and movable along only two longitudinal bearers 8. The latch hooks are provided on the insertion side of the holding frame 7, with an insertion region for the oven door 3 being formed between the neighbouring longitudinal bearers 8, on the insertion side. When inserting the oven door 3 into the 20 holding frame 7, the oven door 3 is inserted into the holding frame 7 with the door-plug 2 first. The latch 10 of the oven door 3 is placed on the latch hooks 9. By means of the latch hooks 9, the oven door 3 is fixed in place in the holding frame 7. Door-centering means 11 are provided, which have a conical cross-section, and which align the oven door 3 accurately during its insertion into the holding frame 7. 25 The stationary cleaning of the stoneware-plug serves to remove graphite deposits from its two longitudinal sides and from the base surface of the oven door 3 and door-plug 2. In the form of embodiment shown, the cleaning can be performed by means of the milling devices 5, from bottom to top. The respective upper and lower end positions are ensured by end-switches (not shown specifically). A cleaning-region 30 25 is formed between the longitudinal bearers 8 of the holding frame 7. The cleaning region 25 must, like the insertion region 24, be sufficiently high and wide to enable precise positioning of the door-plug 2 in the cleaning region 25. The open side of the I1 WO 2007/028589 PCT/EP2006/008680 carrying frame 6 is oriented towards the insertion side of holding frame 7, and therefore, insertion of the oven door 3 is not hindered by the carrying-frame 6. The position of the milling devices 5 is adapted to the inclination of the side-wall of the door plug 2, with the milling devices 5 being arranged at right angles to the s side-walls of the door plug 2, so as to facilitate the cleaning-operation and to ensure a high degree of deposits-removal during the cleaning operation. In addition, a control device (not shown specifically) is provided for controlling, preferably automatically, the forward-feed movement of the milling devices 5 relative to the door plug 2. The control device can be connected to a sensor system, in order to be able to determine to and adjust, in a controlled manner, the distance and forward-feed of milling disks 26 on the milling devices 5 to the side-surfaces of the door plug 2. At each cleaning-stroke, the maximum amount of pollutants removed from side-surfaces of the door plug 2 is less than 5 mm, and preferably between 2 mm and 3 mm. Figure 3 shows another form of embodiment of a coke-oven servicing machine 1 5is according to present invention, in which an additional milling device 28, connected to an additional carrying frame 27, is provided for cleaning a base area of the stoneware plug 2. This additional carrying frame 27 is likewise roller-borne, and can be moved in the vertical direction, by means of an hydraulic cylinder 29. Figure 4 shows a region of the coke oven 4, viewed from above, in which there is a 20 coke-oven servicing device 1 of the type described above on the coke-pushing-machine (not shown specifically) side of the coke oven 4, and another such servicing device 1 on the coke-guide machine (also not shown specifically) side of the coke oven 4. The coke-oven servicing devices 1 are arranged beside the coking chambers (not shown specifically) and are connected to a side-wall 14 of the coke 25 oven 4 and to the bottom of the coke oven 4. As shown in Figure 4, the coke-oven servicing devices 1 are essentially fully enclosed in a housing shutting them off from the environment, at least during the door-plug cleaning operations. For this purpose, each coke-oven servicing device I is integrated into a housing 30, and each housing is connected to a suction exhausting device 31. The suction exhausting device 31 so collects the emissions released during the door-plug cleaning operation and removes them by suction. To clean the air streams suctioned off, each suction device 31 is 12 WO 2007/028589 PCT/EP2006/008680 connected to a filter device. The air streams suctioned off from the two coke-oven servicing devices 1 are led off through a manifold line 33. The housing's 30 side-walls 34, on the side thereof facing the machine, are in each case connected - lateral to the insertion region of the holding frame 7 - to a S longitudinal bearer 8 on the holding frame 7. For inspecting and attending to a cleaned stoneware plug 2, regions of the housing 30 can be connected removably by means of plug devices. The side-walls 34 of the housing 30 are part of a common housing 35 running the entire width of the coke oven 4. The common housing 35 can have inspection doors. The double housing ensures that even when the inner housing ,o 30 or the common housing 35 is opened during a door-plug cleaning operation, no emissions can escape. In addition, the invention provides for combining, as required, the features given in the claims and/or disclosed and described with reference to the drawings, even if such combination is not specifically described. The invention is not limited to the forms of 5is embodiment shown and described.

Claims

1. A coke-oven servicing device (1) for cleaning, by means of at least one milling device (5), the door-plug (2) of an oven door (3) of a coking chamber of a coke oven (4) that has a number of coking chambers arranged next to one another, s with a holding frame (7) having a number of guide-elements, and with at least one carrying frame (6) - for the milling device (5) - movable along the guide elements, said milling device (5) being arranged on the carrying frame (6) and being movable together with the carrying frame (6), characterised in that: /o the holding frame (7) has means (11) designed for door-centering and/or for fastening the door-plug of the oven door (3) in the holding frame (7) between the guide elements, said guide elements running in the longitudinal direction of an oven door (3) centered and/or fastened in the holding frame (7), with the result that the carrying frame (6), together with the milling device (5) for cleaning the door plug (2), 5is is movable along a side-surface of the door plug (2) of an oven door (3) inserted and fastened in the holding frame (7).

2. A coke-oven servicing device as claimed in claim 1, characterised in that preferably two milling devices (5) are provided, arranged mutually-opposite on the carrying frame (6), for simultaneously cleaning both side-surfaces of the door plug 20 (2).

3. A coke-oven servicing device as claimed in claim 1 or 2, characterised in that: the holding frame (7) has, on an insertion side thereof, an insertion region (24) for the insertion of the oven door (3), and the oven door (3) is insertable with the door-plug (2) side into the insertion 25 region (24); and the means (11) for door-centering and/or for fastening the oven door (3) are provided on the insertion side of the holding frame (7).

4. A coke-oven servicing device as claimed in any of the above claims, characterised in that the insertion side of the holding frame (7) is oriented towards a coke-pushing machine and/or a coke-guide machine of the coke oven (4). 14 WO 2007/028589 PCT/EP2006/008680

5. A coke-oven servicing device as claimed in any of the above claims, characterised in that the arrangement of the means (11) for door-centering and/or for fastening the oven door (3) in the holding frame (7) corresponds essentially to the arrangement of means for door-centering and fastening the oven door (3) of a coking s chamber.

6. A coke-oven servicing device as claimed in any of the above claims, characterised in that: the holding frame (7) has a number of neighbouring longitudinal bearers (8) arranged essentially parallel to one another, and /0to preferably, the carrying frame (6) is guided and movable along at least two longitudinal bearers (8) by means of rollers (23).

7. A coke-oven servicing device as claimed in any of the above claims, characterised in that the longitudinal bearers (8) run essentially vertically, parallel to a side-wall (14) of the coke oven (4). 5is

8. A coke-oven servicing device as claimed in any of the above claims, characterised in that the insertion region (24) is bounded by at least two neighbouring longitudinal bearers (8).

9. A coke-oven servicing device as claimed in any of the above claims, characterised in that: 20 the holding frame (7) has, in the longitudinal direction, an n-angular cross-section, preferably a quadrangular cross-section, and preferably, at least one longitudinal bearer (8) is provided on each corner of the holding frame (7).

10. A coke-oven servicing device as claimed in any of the above claims, 25 characterised in that the carrying frame (6) is guided and movable along all the longitudinal bearers (8) of the holding frame (7).

11. A coke-oven servicing device as claimed in any of the above claims, characterised in that, between the longitudinal bearers (8), there is provided a cleaning region (25) for the door plugs (2). 15 WO 2007/028589 PCT/EP2006/008680

12. A coke-oven servicing device as claimed in any of the above claims, characterised in that the carrying frame (6) has an essentially U-shaped cross-section in the holding-frame's (7) longitudinal direction, with the open side of the carrying frame (6) being oriented towards the insertion side of the holding frame s (7).

13. A coke-oven servicing device as claimed in any of the above claims, characterised in that the carrying frame (6) has at least two lateral bars (18) and least one transverse bar (21) connecting the lateral bars (18) to each other.

14. A coke-oven servicing device as claimed in any of the above claims, ,o characterised in that the carrying frame (6) is in the form of a cage, open on one side, with a number of mutually connected lateral bars (18), transverse bars (21), and horizontal bars (22).

15. A coke-oven servicing device as claimed in any the above claims, characterised in that the position of the milling device (5) is adapted to the is inclination of the side-wall of the door plug (2).

16. A coke-oven servicing device as claimed in any of the above claims, characterised in that a control device is provided for controlling - preferably automatically - the forward-feed movement of the milling device (5) relative to the door plug (2). 20

17. A coke-oven servicing device as claimed in any of the above claims, characterised in that the control device is coupled to a drive unit (20).

18. A coke-oven servicing device as claimed in any of the above claims, characterised in that a device for moving the carrying frame (6) is provided, preferably a chain conveyor device having a chain conveyor drive (15). 25

19. A coke-oven servicing device as claimed in any of the above claims, characterised in that at least one additional milling device (27), arranged so as to be movable essentially at right angles to the holding frame (7), is provided for cleaning the base surface of the stoneware plug (2). 16 WO 2007/028589 PCT/EP2006/008680

20. A coke-oven servicing device as claimed in any of the above claims, characterised in that a housing (30), and a suction exhausting device connected to the housing (30), are provided.

21. A coke-oven servicing device as claimed in any of the above claims, s characterised in that: the housing (30) has an opening on the insertion side of the holding frame (7), in the insertion region, and preferably, side-walls (34) of the housing (30) are connected to the longitudinal bearers (8) of the holding frame (7), on the insertion side. io

22. A coke oven (4) with at least one coke-oven servicing device (1) according to any of the above claims.

23. A coke oven as claimed in claim 22, characterised in that: a coke-oven servicing device (1) is provided on the coke-pushing-machine side of the coke oven (4), and a coke-oven servicing device (1) is provided on the ~s coke-guide-machine side of the coke oven (4), and preferably, said coke-oven servicing devices (1) are arranged beside the coking chambers and are connected to a side-wall (14) and/or to a bottom of the coke oven (4).

24. A coke oven as claimed in claim 22 or 23, characterised in that a common 20 housing (35) is provided, shutting the coke-oven servicing devices (1) off essentially completely from the environment, at least during the door-plug (2) cleaning operation, said common housing (35) running the width of the coke-oven (4), from the coke-pushing-machine side to the coke-guide-machine side.

25. A coke oven as claimed in any of the above claims, characterised in that a 25 door lifting device is provided on the coke-pushing machine and/or on the coke-guide machine, for inserting the oven door (3) into, and removing it from, a door opening of the coking chamber, and for inserting the oven door (3) into, and removing it from, the holding frame (7).