EP0421411A2 - Four rotatif - Google Patents

Four rotatif Download PDF

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Publication number
EP0421411A2
EP0421411A2 EP90119014A EP90119014A EP0421411A2 EP 0421411 A2 EP0421411 A2 EP 0421411A2 EP 90119014 A EP90119014 A EP 90119014A EP 90119014 A EP90119014 A EP 90119014A EP 0421411 A2 EP0421411 A2 EP 0421411A2
Authority
EP
European Patent Office
Prior art keywords
furnace
rotary
ring
drum
axial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90119014A
Other languages
German (de)
English (en)
Other versions
EP0421411A3 (en
Inventor
Knut Willi Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0421411A2 publication Critical patent/EP0421411A2/fr
Publication of EP0421411A3 publication Critical patent/EP0421411A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/24—Seals between rotary and stationary parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/08—Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/26—Drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B2007/2246—Support rollers
    • F27B2007/2273—Support rollers with arrangements, e.g. rollers, to maintain the drum against longitudinal movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/26—Drives
    • F27B2007/261—Drives working with a ring embracing the drum
    • F27B2007/262—A gear ring combined with a dented wheel drive

Definitions

  • the invention relates to a rotary kiln, with an externally heated rotary kiln, the ends of which protrude through the walls of a kiln housing, which has refractory material, which is rotatably mounted outside the kiln housing and is driven by a rotary drive, and which is pressurized on its end faces.
  • Such a rotary kiln is known from DE-PS 1 015 987.
  • the rotary kiln of this known rotary kiln is closed and has a metallic shell that surrounds a refractory lining composed of several parts.
  • the metallic shell consists of closed end faces and rods, which are arranged on the outside of the refractory lining parallel to the axis of the drum and pull the cheeks of the end faces against each other.
  • There is a cover which is pressed elastically from the cheek to the end of the drum.
  • the elastic pressure is served by springs which penetrate freely through the cheek and act on plungers engaging the cover, and which, on the other hand, are supported outside of the cheek on members rigidly connected to it.
  • the invention is therefore based on the object of improving a rotary kiln with the features mentioned above in such a way that its rotary kiln does not need a metallic shell in the external heating area and is mechanically insensitive and thermally variable and is practically not subject to any dimensional limitations.
  • the furnace rotary drum designed as a tube with ends open for loading and unloading with material to be treated consists of thermally resistant ceramic material which is pressurized by ring parts in the sense of avoiding damage to the furnace rotary drum in the wall area of the housing.
  • thermally resistant ceramic material is used for an oven rotating drum designed as a tube.
  • this material it is possible to use outside heating temperatures that are above the melting temperature of metals that should be used for a support structure of the furnace rotating drum.
  • the use of ceramic material in rotary kilns is made possible by the fact that the ceramic material is pressurized in the wall area of the housing in order to avoid damage to the rotary kiln.
  • the rotary kiln therefore works with a pressure-preloaded kiln rotating drum designed as a cylindrical tube.
  • the pressure prestresses can be dimensioned by appropriate pressurization in such a way that those occurring due to the temperature gradients in the wall area within the furnace rotating drum Shrinking or thermal stresses cannot have a destructive effect on the furnace rotating drum.
  • the furnace rotating drum is expediently in one piece. This has the advantage that the furnace rotary drum is manufactured overall in the same manufacturing process and therefore only has certain properties through a single manufacturing process.
  • Sintered ceramics for example, are used for the rotary kiln and are temperature-resistant up to 1800 ° C. However, it is only resistant to thermal changes to a comparatively small extent and it is mechanically sensitive. In addition, furnace rotary drums made of sintered ceramic can only be produced with limited dimensions, for example in length, in diameter and with smaller dimensions of the wall. The dimensional accuracy is also low due to the manufacturing process. As a result, rotary kilns with rotary kilns made of such a ceramic material would be correspondingly structurally limited. In addition, green ceramic can be thermally treated to just above the maximum operating temperature of the rotary kiln.
  • the furnace rotary drum in the passage area through the walls of the furnace housing is not overstressed by the temperature gradient occurring there.
  • the shrinking process of the ceramic material which occurs at high temperature and the shrinkage stresses caused thereby between warmer and less warmer regions of the furnace rotary drum cannot occur because the shrinking process is anticipated by the heat pretreatment.
  • such rotary kilns would also be mechanically sensitive and less resistant to thermal changes.
  • the aforementioned difficulties are reduced or eliminated if the ceramic material is pressurized in the sense of the features mentioned above.
  • the furnace rotating drum consists of thermally untreated ceramic material.
  • This is produced, for example, by a thermal spraying process, in particular by a water-stabilized plasma flame spraying process with an assembly, for example in accordance with DIN 32 530 K.2.4.6.4./DVS 2301.
  • This is a conventional ceramic material which, for the rotary kiln purposes in question, can neither be regarded as mechanically sensitive, non-changeable, nor limited in size.
  • the furnace rotating drum is only rotatably supported on the end faces by means of the pressurized ring parts.
  • the ring part can be used not only for the axial application of the kiln rotating drum, but also for driving the kiln rotating drum. This is advantageously achieved in that an annular part is designed as a flange, on which both at least one clamping element for pressurizing the furnace rotary drum and for its rotary drive act.
  • a very simple design of the rotary kiln results from the fact that the tensioning element of one of the ring parts is a rigidly supported roll on a ring part flange, that the tensioning element of the other ring part is a spring-loaded roll supported on the ring part flange, and that the rotary drive is parallel to the pipe axis on the roller-loaded ring flange engages one or both ring parts.
  • each ring part is connected to an axial sleeve and that the two axial sleeves serve the radial rotary mounting of the rotary kiln.
  • the ring part is particularly suitable for Suitable only from the end faces rotating bearing of the furnace rotating drum, the distance between the axial sleeve and the end of the furnace rotating means a thermal separation that allows the end of the furnace to be formed with low temperature gradients.
  • the rotary kiln is advantageously designed in such a way that its furnace jacket is provided with head flanges, each of which has an axial cylinder in which the axial sleeve of a ring part is supported radially and supported in rotation.
  • the radial support and rotary bearing of the axial sleeve in the axial cylinder allow the use of conventional sliding and / or roller bearings for the radial bearing of the furnace rotating drum.
  • the rotary kiln is constructed so that the clamping elements serving to pressurize the kiln rotating drum are arranged between the ring part and the top flange and are supported on the axial cylinder.
  • the result is a rotary kiln, the front of the rotary kiln of which can be kept free from the storage or the pressurization of the components serving the rotary kiln, so that the loading and unloading of the rotary kiln is undisturbed accordingly.
  • the rotary kiln is also designed so that a fixed radial counter-pressure flange is attached to the axial cylinder of the top flange, on which a pressure ring that rotates according to the ring part or the clamping elements and, if necessary, rotates according to the associated ring part, is axially supported on the roller or roller bearing, on which the clamping elements attack and which is mounted radially on the axial cylinder of the head flange.
  • the construction can be easily assembled, since all components can be made axially pluggable.
  • the aforementioned construction can also be made particularly wear-resistant by supporting the Pressure ring on the counter pressure flange and the radial bearing of the pressure ring on the axial cylinder of the head flange is carried out via replaceable wear components.
  • the transition of the furnace rotary drum from the hot to the cold region can thereby be influenced in the sense of a reduction in the thermal stresses occurring in the furnace drum and thus also in the sense of a reduction in the compressive preload of the furnace drum that between the axial cylinder of the top flange and the furnace drum and / or an insulating layer is present between the radial flange of the top flange and the furnace jacket.
  • a further advantageous embodiment of the rotary kiln in the region of the furnace end results from the fact that the ring part has an axial sleeve facing away from the furnace rotating drum, which serves to load the furnace rotating drum and is supported radially with a roller bearing within the axial cylinder.
  • the rotary kiln is in particular axially compact and the components involved in the storage of the furnace end are encapsulated within the axial cylinder.
  • the axial sleeve can be used to load the rotary kiln.
  • the rotary kiln is designed so that the rolling bearing is axially displaceable on the axial sleeve and axially adjustable with a clamping flange for axial application of the rotary oven, which is axially adjustable fixed to the axial sleeve.
  • a compression spring is arranged as a tensioning element between the axial cylinder of the head flange and the axial sleeve of the ring part, which is supported on the one hand on the ring part and on the other hand on an axially displaceable pressure flange, which in turn is supported on the inner ring of the rolling bearing .
  • the pressure spring and pressure flange rotate together with the ring part.
  • the axial sleeve has conveying means on the inside for the material to be treated in the furnace rotating drum.
  • the rotary kiln is developed in such a way that the rotary kiln is assembled with a three-part base frame, which consists of a replaceable central part and two end parts arranged on both sides of the latter, on each of which a bearing unit for a drum end is arranged.
  • the two end parts of the base frame with their bearing units for one drum end form a structural unit which can be assembled, tried out and handled independently of the structure of the rotary kiln.
  • Middle parts of different lengths can be used to assemble furnace rotary drums of different lengths with the structural units formed from frame end parts and bearing units.
  • the rotary kiln is largely independent of the dimensions of the furnace housing. Inclined positions of the drum can be reliably predetermined by appropriate training of the frame parts.
  • each bearing unit is arranged horizontally with its central axis Axial cylinder which is rotationally driven on its outer circumference and axially displaceably limited to two times on the frame end part with an axial spacing, and on the inside of which a ring part acting on the furnace rotating drum engages in a rotationally fixed manner.
  • the axial cylinder can also be used advantageously for the further structural design of the rotary kiln by attaching a pressure ring to the distal end of the axial cylinder, acting axially on the frame-fixed clamping or counter-clamping elements and / or that on the axial ends of the drum-mounted rotary cylinder each act synchronized rotary drives and / or that with the rotary driven axial cylinder and / or with the Ring part are supported in relation to the rotating conveying material discharge pipes.
  • a pressure ring to the distal end of the axial cylinder, acting axially on the frame-fixed clamping or counter-clamping elements and / or that on the axial ends of the drum-mounted rotary cylinder each act synchronized rotary drives and / or that with the rotary driven axial cylinder and / or with the Ring part are supported in relation to the rotating conveying material discharge pipes.
  • the ring part is gimbally attached to the axial cylinder with an intermediate ring via two mutually perpendicular compensation axes.
  • the resulting gimbal mounting of the drum ends makes it possible to take tolerances in the storage area caused by drum load into account and also to accept larger predetermined misalignments of the rotary kiln with respect to the bearing units or their axes without constructive measures on the frame.
  • the temperature gradient between the end of the drum and the components of the rotary kiln which are at ambient temperature can be considerable, in particular if conveyed material discharge pipes are used in which the temperature of the conveyed material is only to drop slowly in a predetermined manner.
  • the rotary kiln is designed to control a high temperature gradient so that the ring part has an inclined ring wall away from the drum axis, which directly or with an inclined support ring pointing in the opposite direction on one inner gimbal is attached.
  • a slip clutch is present between the furnace rotary drum and the ring part and / or that the relative positions of the drum ends are provided for the synchronization of the rotary drives .
  • the slipping clutch responds in such a way that destructive moments due to uneven synchronization of the rotary drives cannot lead to the furnace rotary drum breaking. With the aid of the measuring devices, it can be ensured that the rotary drives are acted on in such a way that a maximum permissible relative rotation of the drum ends, which prevents a drum breakage, is not achieved.
  • the rotary kiln is designed in such a way that the clamping elements acting on the axial cylinder are supported by piston cylinders which can be acted upon by fluid and / or the counter-clamping elements are supported by spring force, all elements fixed to the frame bearing against pressure rollers on a roller conveyor of the rotary-driven axial cylinder or a component which is fixed against rotation therewith.
  • a liquid or gaseous pressure medium is used as the fluid.
  • the spring support by the counter-tensioning elements can be designed to be harmless. It also serves to ensure that the axial cylinder is acted upon by all elements regardless of construction tolerances, so that unbalanced drum load is avoided.
  • An advantage for the rotary kiln is an embodiment in which the kiln rotating drum with the ring part and / or with conveying material discharge tubes forms an installation unit that is prestressed when the kiln rotating drum is assembled with the axial cylinders. It is therefore not necessary to align the drum and its ring parts until the furnace has been completed, which could lead to malfunctions if the procedure is improper. Simple crane installation is made possible.
  • Each rotary kiln 10 shown in FIGS. 1 to 5 basically consists of an oven rotary drum 11, the central part of which between the oven walls 14 has an operating temperature of e.g. 1500 ° C is exposed.
  • the heat is to pass through the furnace rotating drum 11 into the interior thereof in order to subject the material to be treated there to a corresponding heat treatment.
  • Each furnace rotary drum 11 consists of thermally untreated ceramic material and is dimensioned such that it can withstand the mechanical loads arising from the material to be treated.
  • the furnace rotating drum must be able to cope with an axial pressurization which is generated by ring parts 17 which press axially on end faces 18, 19 of the furnace rotating drum 11.
  • the pressurization serves to pretension the furnace rotating drum 11, so that the pressure gradients occurring primarily in the region of the furnace walls 14 cannot have a detrimental effect on the furnace rotating drum 11.
  • the furnace rotating drum 11 is rotated during the heat treatment of the material to be treated.
  • the rotary kiln therefore requires a radial bearing which rotatably supports the kiln rotating drum 11.
  • the axial loading of the furnace rotating drum 11 in the sense of a pressure preload and the rotary mounting of the furnace rotating drum is designed differently in the embodiments of FIGS. 1 to 3.
  • the ring part 17 of the embodiment of Figure 1 is formed with a flange 21 which extends radially as an annular flange.
  • the ring part 17 has an axial sleeve 23, which tightly surrounds the end 12, 13 of the rotary oven 11 and whose radial bearing is used.
  • it is supported with radial bearing rollers 25, which are present in triplicate similar to FIG. 1a and are evenly distributed around the circumference of the axial sleeve 23.
  • the rollers 23 are resiliently supported, e.g. on a triangular frame 41, which is connected in a manner not shown to a furnace frame or to the floor.
  • the frame 41 allows unhindered access to the interior of the furnace rotating drum 11.
  • the radial ring flange 21 of the ring member 17 is supported on the tube end 12 on a roller 22 which in turn is fixedly attached to the frame 41 and thereby forms the clamping element 20 'acting as an abutment.
  • This clamping element 20 'passes into the ring flange 21 that reaction force which is generated by the clamping element 20 at the other tube end 13, namely with a spring-mounted roller 24, which in turn is attached to a pivotable lever 42 on the frame 41.
  • the three rollers 24 according to FIG. 1a are evenly distributed over the circumference of the ring partial flange 21 in order to achieve stresses which are as uniform as possible in the furnace rotary drum 11.
  • the rotary force driving the furnace rotary drum 11 is generated by a rotary drive 16, for example an electric motor, the drive torque of which is introduced with the pinions 43 into the ring-part flanges 21 correspondingly toothed on the circumference.
  • the pinion 43 can likewise be acted upon by the rotary drive 16 by means of a power transmission device 44 (not shown).
  • FIG. 2 shows an embodiment in which a rotary kiln 11 made of the ceramic material described at the outset is axially pressurized with a ring part 17, also via its end face 18.
  • This rotary kiln 10 is designed so that the rotary kiln 11 is held exclusively over these end faces 18 he follows.
  • an axial sleeve 23 'of the ring member 17 has a distance a from the end 12 of the furnace rotating drum 11. The axial sleeve 23' can therefore give no mechanical action to the furnace rotating drum 11, which is free of alternating stresses from here.
  • the kiln rotating drum 11 penetrates the wall 14 of the kiln housing 15 with its tube end 12 and jumps up to the ring part 17, the ring part flange 21 of which is at the required distance from the wall 14 in order to accommodate a device for the axial pressure application of the kiln rotating drum 11, which ensures the best possible concentricity Oven rotating drum 11 should cause.
  • the head flange 27 has an axial cylinder 28 which is the supporting part for the axial sleeve 23 '.
  • the radial bearing serves primarily a radial plain bearing 45, consisting of the two illustrated, in the axial sleeve 23 'or in the axial cylinder 28 mounted plain bearing bushes. Furthermore, there are radial bearing rollers 25, for example four radial bearing rollers 25 distributed over the circumference, which serve the concentricity and the even more secure support of the axial sleeve 23 '.
  • the radial bearing rollers 25 are resiliently supported on an axial flange 46, which is part of a counter pressure flange 29 which is screwed to the axial cylinder 28.
  • a pressure ring 30 which can be rotated in the form of a bearing sleeve on the axial cylinder 28 or a wear component 32 surrounding it.
  • Axial support of the pressure ring 30 takes place via axial bearing rollers 47 on the counter pressure flange or on a wear component 31 arranged in front of it in the form of an abutment disk.
  • a roller bearing can be used, in particular if the counter pressure flange 29 and / or the axial cylinder 28 is or are cooled.
  • the pressure ring 30 is connected to the ring part flange 21 of the ring part 17 in a tensile manner via a tensioning element 20 ⁇ and axially in the plane of illustration to the left for abutment against the Counter pressure ring 29 pulled.
  • the tensioning element 20 ⁇ is, for example, a tension spring or a compression spring, the support plates of which are connected, for example, through the interior of the compression spring to the articulation point of the ring partial flange 21 or the pressure ring 30 adjacent to the other spring end.
  • the pressure ring 30, like the ring partial flange 21, can be subjected to rotation by a drive pinion 43, both drive pinions being acted upon by a rotary drive 16 via a force transmission device 44, not shown.
  • the pressure ring 30 is thus rotated just as quickly and in the same direction as the ring flange 31, so that accordingly the clamping elements 20 ⁇ rotate.
  • the pressure ring 30 has a slide bearing 45 ', which is formed by the bearing bushes shown, one of which is, for example, a graphite bushing, while the other, as with the bearing 45, can be a ceramic bushing.
  • the ring member 17 is provided with a rotationally driven axial sleeve 23 ⁇ , which extends from the flange 21 from the furnace rotating drum 11 in the opposite direction and serves to feed the furnace rotating drum 11 with material to be treated.
  • the inside diameter of the axial sleeve 23 ⁇ is provided with conveying means 40, for example with a screw conveyor or the like, which is only shown schematically.
  • the inside diameter of the axial sleeve 23 ⁇ is smaller than the inside diameter of the oven rotating drum 11, so that the material to be conveyed is fed into the oven rotating drum via a conical inlet funnel 11 arrives.
  • the other end 13 of the furnace rotation drum 11 is formed in a similar manner, but with a ring part, which allows unloading of the material to be treated from the rotary oven, for example by correspondingly large internal dimensions in connection with discharge slots or the like.
  • the radial bearing is a roller bearing 36 which is axially displaceably mounted on the outer circumference of the axial sleeve 23 ⁇ .
  • the axial setting of this roller bearing 36 which supports in the radial direction, is used by a clamping flange 37 which is axially e.g. can be adjusted and locked with a screw connection 50, not shown in detail.
  • the clamping flange 37 has an outer diameter within the axial cylinder 28 which corresponds approximately to the inner diameter of the axial cylinder 28 and forms a sliding seat.
  • the axial adjustment of the clamping flange 37 is necessary in order to be able to adjust the axial loading of the furnace rotating drum 11 by the ring part 17.
  • the clamping flange 37 acts via the roller bearing 36 or its inner ring, not shown, on a pressure flange 39, on which one end of a clamping element 20 ′′′, which is designed as a compression spring, is supported, the other end of which acts on the ring partial flange 21 and seals it against the end face with a seal 51 18 of the rotary drum 11 presses.
  • the rotary oven drum 11 can be held radially exclusively via its axially pressurized end faces 18, 19.
  • the rotary kiln 11 is supported by means of two bearing units 55. These bearing units 55 are located on frame end parts 54 which are connected to one another by an exchangeable central part 53.
  • Each bearing unit 55 consists essentially of an axial cylinder 28 ', which has on its outer circumference two spaced apart a races 67,68, which are each supported on bearing rollers 69, each of which is rotatably supported by pillow block bearings 70.
  • Each bearing rim 67,68 are assigned two bearing rollers 69, between which the rims 67,68 are immersed, so that the axial cylinder 28 'is also supported laterally.
  • the rims 67, 68 are fastened to support disks 71, 72, both of which are welded to the axial cylinder 28 '.
  • the support plate 71 is attached to the pipe-near end 73 of the axial cylinder 28 'and rotatably connected to a support ring 74 which is welded to the outer circumference of an outer gimbal 75.
  • the outer gimbal 75 carries a schematically illustrated axle bearing 76 for one end of a compensating axis 62 which is perpendicular to a further compensating axis 63, the associated axle bearing of which is shown in broken lines in FIG.
  • This axle bearing of the compensating axis 63 is part of an inner gimbal ring 66.
  • the drum 11 can adjust with its drum axis 64 in any small angular positions to the central axis 56 of the axial cylinder 28 '.
  • a ring member 17 is used for axially pressurizing the furnace rotary drum 11.
  • the ring member 17 has a ring wall 65 inclined away from the drum axis 64, on the outer circumference of which a support ring 65 'is fastened, which points in the opposite direction and whose support wall is also from the drum axis 64 is inclined away.
  • the inner gimbal 66 is attached to its outer diameter with the largest diameter.
  • the ring wall 65 and the support ring 65 ' are used for better control of the temperature gradient from the drum 11 to the universal joint or to the axial cylinder 28'. They are attached to each other by screwing, as is the attachment of the support ring 65 'to the gimbal 66 and the attachments of the components 67, 71, 74 and 68 and 72.
  • a pressure ring 59 is fastened, namely by screwing to a support ring 77 welded to the axial cylinder 28'.
  • the pressure ring 59 has on its outer circumference a drive ring 78 which, according to FIG 79 is looped, for example by a toothed belt which engages in a toothing of the drive ring 68, not shown, and is acted upon by the rotary drive 16.
  • the rotary drive 16 is mounted on a drive frame 16 ', which can be firmly connected to the frame end part 54.
  • the drum 11 With the pressure ring 59, the drum 11 is pressurized via the axial cylinder 28 'and the other components connected up to the ring part 17.
  • the ring part 17 presses on the end face of the tubular drum 11 via a slipping clutch 80 designed as a graphite ring.
  • the ring part 17 has a securing collar 81.
  • the material conveyed out of the drum 11 thus arrives in a discharge pipe 60 which is long enough to pass through a support frame 83 on which counter-tensioning elements 20 V are supported.
  • the support frame 83 can be fastened to the frame end part 54.
  • the counter-tensioning elements 20 V are represented schematically in FIG. 4 by spring symbols. It can be seen that, for example, three tensioning elements are evenly distributed over the circumference, similar to the rollers 24 in FIGS. The closer formation of these counter-tensioning elements 20 V is shown in FIG. 5.
  • the frame 83 has a sliding sliding bearing 84, not shown, in which a sliding rod 85 is guided so as to be easily movable. Bellows 86 are used to protect this mounting.
  • the rod 85 is provided with a fork piece 87, the articulation pin 88 of which is articulated on an abutment pin 89 which supports a collar ring 90 Compression spring 91 is used, the other end of which is supported on the frame, for which a support cylinder 92 is used.
  • the other end of the slide rod 85 carries a pressure roller 94 with a fork piece 93, which acts on the pressure ring 59 via the ring 82 or its roller conveyor 101.
  • the axial cylinder 28 'of the other frame end part 54 is acted upon by clamping elements 20 IV , which are designed as hydraulically or pneumatically actuated piston-cylinder drives. They are carried by a further support frame 83 'which is fastened to the frame end part 54 shown on the left in FIG. 4 and are distributed circumferentially there as well as the counter-tensioning elements 20 V. If the clamping elements 20 IV are applied, the axial cylinder 28 'of the bearing unit 55 presses on the drum 11, which in turn acts on the axial cylinder 28' of the bearing unit 55 shown on the right in FIG. 4, which is supported on the counter-clamping elements 20 V according to FIG . The compression springs 91 are compressed so that it is ensured that all pressure rollers 94 act uniformly on the pressure ring 59.
  • the axial cylinder 28 ' is larger in diameter than the drum 11, as shown in FIG. 5, so that the discharge tubes 60, 60' shown and in addition a ring-cylindrical insulation 95 can be accommodated with the cooling section effect.
  • the discharge tube 60 ' is also surrounded by a heat protection tube 96 which, in conjunction with insulation 97, ensures continuous heat transfer from the drum 11 into the discharge tube 60.
  • a pretensioning device 98 is indicated, which essentially consists of a thrust washer 99 and a clamping element 100, not shown, which has the thrust washer 99 of the illustrated bearing unit 55 and a corresponding one Clamping the thrust washer of the opposite bearing unit 55.
  • the thrust washers press on the discharge pipes 60, the ring parts 17, the slip clutch 80 and the drum 11, so that these components form an assembly unit which ju can be stier, so that the installation on site does not lead to errors.
  • Each bearing unit can be divided in two horizontally so that installation from above is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP19900119014 1989-10-05 1990-10-04 Rotary drum furnace Withdrawn EP0421411A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893933259 DE3933259A1 (de) 1989-10-05 1989-10-05 Drehrohrofen
DE3933259 1989-10-05

Publications (2)

Publication Number Publication Date
EP0421411A2 true EP0421411A2 (fr) 1991-04-10
EP0421411A3 EP0421411A3 (en) 1992-03-11

Family

ID=6390878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900119014 Withdrawn EP0421411A3 (en) 1989-10-05 1990-10-04 Rotary drum furnace

Country Status (2)

Country Link
EP (1) EP0421411A3 (fr)
DE (1) DE3933259A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492229A1 (fr) * 1990-12-11 1992-07-01 Osaka Fuji Corporation Procédé d'extraction de métaux de matières brutes contenant des métaux
ES2071575A2 (es) * 1992-08-12 1995-06-16 Air Liquide Horno de mantenimiento de la temperatura de una carga metalica fundida y procedimiento de empleo.
EP1079190A1 (fr) * 1999-08-20 2001-02-28 Harper International Corp. Four tubulaire rotatif en graphite
CZ299877B6 (cs) * 2001-08-07 2008-12-17 Arcelormittal Ostrava A.S. Navíjecí pec a zpusob jejího rízení
CN100519007C (zh) * 2006-12-29 2009-07-29 上海广益高温技术实业有限公司 回转式高温烧结装置
EP2645035A1 (fr) * 2012-03-29 2013-10-02 SUG Schmelz- und Gießanlagen GmbH & Co. KG Four à tambour rotatif
CN104567349A (zh) * 2014-12-08 2015-04-29 广西泰星电子焊接材料有限公司 一种煤气回转窑
DE202016106652U1 (de) 2016-11-29 2016-12-09 Michael Schmidt Drehtrommelofen
CN112595097A (zh) * 2020-12-23 2021-04-02 成都天保节能环保工程有限公司 一种纯碱煅烧炉设备

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US1734417A (en) * 1927-01-27 1929-11-05 Ind Of America Inc Rotary kiln
FR1063007A (fr) * 1951-01-30 1954-04-29 Four rotatif à chauffage extérieur
GB2094906A (en) * 1981-03-13 1982-09-22 Tosco Corp Retort seal mechanism
DE3340247A1 (de) * 1983-11-08 1985-05-15 Harro J. Dipl.-Ing. 7888 Rheinfelden Taubmann Rohre aus oxyd-keramik und verfahren zu deren herstellung

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492229A1 (fr) * 1990-12-11 1992-07-01 Osaka Fuji Corporation Procédé d'extraction de métaux de matières brutes contenant des métaux
US5261943A (en) * 1990-12-11 1993-11-16 Vereinigte Aluminium-Werke A.G. Method and apparatus for the extraction of metals from metal-containing raw materials
ES2071575A2 (es) * 1992-08-12 1995-06-16 Air Liquide Horno de mantenimiento de la temperatura de una carga metalica fundida y procedimiento de empleo.
EP1079190A1 (fr) * 1999-08-20 2001-02-28 Harper International Corp. Four tubulaire rotatif en graphite
CZ299877B6 (cs) * 2001-08-07 2008-12-17 Arcelormittal Ostrava A.S. Navíjecí pec a zpusob jejího rízení
CN100519007C (zh) * 2006-12-29 2009-07-29 上海广益高温技术实业有限公司 回转式高温烧结装置
EP2645035A1 (fr) * 2012-03-29 2013-10-02 SUG Schmelz- und Gießanlagen GmbH & Co. KG Four à tambour rotatif
CN104567349A (zh) * 2014-12-08 2015-04-29 广西泰星电子焊接材料有限公司 一种煤气回转窑
DE202016106652U1 (de) 2016-11-29 2016-12-09 Michael Schmidt Drehtrommelofen
CN112595097A (zh) * 2020-12-23 2021-04-02 成都天保节能环保工程有限公司 一种纯碱煅烧炉设备
CN112595097B (zh) * 2020-12-23 2024-06-07 成都天保节能环保工程有限公司 一种纯碱煅烧炉设备

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DE3933259A1 (de) 1991-04-11
EP0421411A3 (en) 1992-03-11

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