EP0017811A1 - Rotary drum having at least one tubular heat accumulator arranged therein - Google Patents

Rotary drum having at least one tubular heat accumulator arranged therein Download PDF

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Publication number
EP0017811A1
EP0017811A1 EP80101593A EP80101593A EP0017811A1 EP 0017811 A1 EP0017811 A1 EP 0017811A1 EP 80101593 A EP80101593 A EP 80101593A EP 80101593 A EP80101593 A EP 80101593A EP 0017811 A1 EP0017811 A1 EP 0017811A1
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EP
European Patent Office
Prior art keywords
disks
pins
sliding grooves
outer jacket
tube
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.)
Granted
Application number
EP80101593A
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German (de)
French (fr)
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EP0017811B1 (en
Inventor
Wolfgang Dipl.-Ing. Keller
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Bayer AG
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Bayer AG
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Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0017811A1 publication Critical patent/EP0017811A1/en
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Publication of EP0017811B1 publication Critical patent/EP0017811B1/en
Expired 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 peculiar to rotary-drum furnaces
    • 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
    • F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
    • F27B7/04—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions

Definitions

  • the invention relates to a rotary tube with an outer jacket and at least one heat-treatment tube arranged therein which is held in end disks and optionally intermediate disks, these disks being supported on the outer jacket.
  • the task to be solved is to find a rotary tube in which the thermal expansions between the heated treatment tube and the colder outer jacket are compensated for while avoiding stress.
  • one of the disks is fixed in the axial direction, but is movably guided in the radial direction; and the at least n-1 disks each have at least three pegs pointing in the radial direction, which engage in associated slide grooves provided on the outer jacket and extending axially parallel, these slide grooves having a length and depth such that those to be expected as a result of the thermal expansion of the treatment tube Displacements of the pegs in different directions are recordable.
  • the insert consisting of one or more treatment tubes mounted in end disks and possibly intermediate disks can expand freely in the axial direction of the rotary tube as well as in the radial direction under the influence of heat and is nevertheless adequately and stress-free stored in the outer jacket.
  • the contact surfaces of the pins and sliding grooves during one turn rotation periodically loaded up to a maximum and also completely relieved.
  • the edge of the fixed disk engages in an annular groove in the outer jacket, which lies in a plane perpendicular to the longitudinal axis of the tube.
  • the groove must be deep enough to absorb the radial thermal expansion of the disc.
  • the width of the groove should be selected so that the washer is not clamped under the operating conditions.
  • the other sliding grooves allow the longitudinal displacement of the engaging pins and their expansion in the radial direction due to their axially parallel arrangement.
  • the actual rotary tube 1 consists of an outer jacket 3 provided with a refractory lining 2 and an insert 4 held therein.
  • a torch lance 6 and a feed tube 7 are passed through a rigidly arranged head piece 5.
  • Another head piece 8, which is displaceable in the axial direction of the rotary tube 1, is arranged at the other end of the rotary tube 1. It is provided with rollers 10 running on rails 9 and has a material outlet opening 11 in the lower part and a gas outlet opening 12 in the upper part.
  • the outer jacket 3 is provided with races 13, which rest on roller bearings 14. The drive that over tooth ring and pinion or directly driven rollers is not shown.
  • the outer jacket 3 has an annular groove 15 toward the head piece 5. Furthermore, four circumferential sliding grooves 16 are provided at certain intervals in the longitudinal direction, which are formed by strong sheets 17 welded to the outer jacket. The latter are still secured by supports 18 (Fig. 3).
  • the insert 4 consists of a fixed end plate 19, the edge of which engages in the annular groove 15, and of a further end plate 20, the intermediate plates 21 (only one is shown) and the treatment tubes 22 mounted in the plates 19, 20, 21 Face disk 19 carries on the outside a loading ring 23 into which the feed tube 7 opens.
  • the depth of the annular groove 15 is matched to the largest diameter of the face plate 19 under the influence of heat so that a gap still remains.
  • the width of the annular groove 15 is slightly larger than the thickness of the edge of the engaging face plate 19 so that the face plate 19 can rotate freely when the insert 4 rotates, but is sufficiently held in position in the longitudinal direction.
  • the disks 20, 21 have welded pins configured as sliding blocks 24, which are reinforced by supports 25 (FIG. 4).
  • the sliding blocks 24 engage in the sliding grooves 16; their depth and width are matched to the greatest thermal expansion to be expected of the disks 20, 21 or the sliding blocks 24 in order to ensure a sliding movement even in extreme cases.
  • the face plate 19 has openings 26 for the filling of the treatment tubes 22 and a central opening 27 through which the burner lance 6 projects.
  • the disks 20, 21 are provided with openings 28 for the passage of the gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

Bei Drehrohren (1) wird ein unter Wärmeeinfluss sich dehnender Einsatz (4) in einem kalten Aussenmantel (3) mittels einer Stirnscheibe (19) zwar in radialer Richtung beweglich, jedoch in axialer Richtung fixiert gehalten, während weitere Scheiben (20, 21) des Einsatzes (4) Zapfen (27) aufweisen, die infolge der Wärmedehnung in achsparallelen Gleitnuten (16) geführt sind, wobei je Scheibe (20, 21) über dem Umfang mindestens je drei Zapfen (24) und Gleitnuten (16) vorgesehen sind.In the case of rotary tubes (1), an insert (4) that expands under the influence of heat is movable in a radial outer jacket (3) by means of a face plate (19) in the radial direction, but is fixed in the axial direction, while further plates (20, 21) of the Insert (4) have pins (27) which, due to the thermal expansion, are guided in axially parallel sliding grooves (16), with at least three pins (24) and sliding grooves (16) being provided per disk (20, 21) over the circumference.

Description

Die Erfindung betrifft ein Drehrohr mit einem Außenmantel und mindestens einem darin angeordneten wämebeaufschlagbaren Behandlungsrohr, das in Stirnscheiben und gegebenenfalls Zwischenscheiben gehalten ist, wobei diese Scheiben am Außenmantel abgestützt sind.The invention relates to a rotary tube with an outer jacket and at least one heat-treatment tube arranged therein which is held in end disks and optionally intermediate disks, these disks being supported on the outer jacket.

Bei der thermischen Behandlung von Feststoffen in indirekt beheizten Drehrohren treten bei Wandtemperaturen der Behandlungsrohre über 450°C Probleme bezüglich der zulässigen Spannungen auf. Selbst bei warmfesten Materialien ist die Drehrohrlänge, z.B. bei Temperaturen von ca. 1000°C, auf wenige Meter begrenzt, falls keine aufwendigen Zwischenlagerungen vorhanden sind.In the thermal treatment of solids in indirectly heated rotary tubes, problems with the permissible stresses arise at wall temperatures of the treatment tubes above 450 ° C. Even with heat-resistant materials, the length of the rotary tube, e.g. at temperatures of approx. 1000 ° C, limited to a few meters if there are no expensive intermediate storage.

Bei langen beheizbaren Behandlungsrohren besteht das Problem, die Wärmedehung in Bezug auf den sich weniger dehnenden kälteren Außenmantel zu kompensieren. Das gleiche Problem tritt auch schon bei kurzen, jedoch hochbeheizten Behandlungsrohren auf. In beiden Fällen kann auch noch die radiale Wärmedehnung Probleme aufwerfen.Ehandlungsrohren during long heated B, the problem is the Wärmedehung in relation to the less elongating to compensate for colder outer sheath. The same problem occurs with short, but highly heated treatment tubes. In both cases, radial thermal expansion can also pose problems.

Die zu lösende Aufgabe besteht darin, ein Drehrohr zu finden, bei dem die Wärmedehnungen zwischen dem beheizten Behandlungsrohr und dem kälteren Außenmantel unter Vermeidung von Spannungen kompensiert werden.The task to be solved is to find a rotary tube in which the thermal expansions between the heated treatment tube and the colder outer jacket are compensated for while avoiding stress.

Diese Aufgabe wird dadurch gelöst, daß eine der Scheiben in axialer Richtung fixiert ist, jedoch in radialer Richtung bewegbar geführt ist; und das mindestens n-1 Scheiben mindestens je drei in radialer Richtung weisende Zapfen aufweisen, die in zugeordnete, am Außenmantel vorgesehene und sich achsparallel erstreckende Gleitnuten eingreifen, wobei diese Gleitnuten eine solche Länge und Tiefe aufweisen, daß die infolge der Wärmedehnung des Behandlungsrohres zu erwartenden Verschiebungen der Zapfen in den verschiedenen Richtungen, aufnehmbar sind.This object is achieved in that one of the disks is fixed in the axial direction, but is movably guided in the radial direction; and the at least n-1 disks each have at least three pegs pointing in the radial direction, which engage in associated slide grooves provided on the outer jacket and extending axially parallel, these slide grooves having a length and depth such that those to be expected as a result of the thermal expansion of the treatment tube Displacements of the pegs in different directions are recordable.

Es versteht sich, daß alternativ die Zapfen am Außenmantel und die Gleitnuten an den Scheiben vorgesehen sind.It is understood that, alternatively, the pins on the outer casing and the sliding grooves on the disks are provided.

Dadurch wird erreicht, daß der aus einem oder mehreren in Stirnscheiben und gegebenenfalls Zwischenscheiben gelagerten Behandlungsrohren bestehende Einsatz sich sowohl in Achsrichtung des Drehrohres als auch in radialer Richtung unter dem Wärmeeinfluß frei ausdehnen kann und trotzdem im Außenmantel hinreichend und spannungsfrei gelagert ist.It is thereby achieved that the insert consisting of one or more treatment tubes mounted in end disks and possibly intermediate disks can expand freely in the axial direction of the rotary tube as well as in the radial direction under the influence of heat and is nevertheless adequately and stress-free stored in the outer jacket.

Während der Drehung des Drehrohres werden die Kontaktflächen der Zapfen und Gleitnuten während einer Umdrehung periodisch bis zu einem Maximum belastet und auch wiederum völlig entlastet. Der Rand der fixierten Scheibe greift in eine Ringnut des Außenmantels ein, die in einer Ebene senkrecht zur Rohrlängsachse liegt. Die Nut muß tief genug sein, um die radiale Wärmedehnung der Scheibe aufnehmen zu können. Die Breite der Nut ist so zu wählen, daß unter den Betriebsbedingungen die Scheibe nicht geklemmt wird. Die übrigen Gleitnuten gestatten durch ihre achsparallele Anordnung die Längsverschiebung der eingreifenden Zapfen sowie deren Dehnung in radialer Richtung. Während einer Umdrehung wird also der aus dem Behandlungsrohr und den Scheiben bestehende Einsatz nicht durch die Stirnseiten der Zapfen getragen sondern durch deren Flanken, die auf den Wänden der Gleitnuten aufliegen. Dabei ist jeder Zapfen während seiner senkrechten Stellung, d.h. in der unteren und oberen Lage, völlig entlastet, während zur horizontalen Lage hin seine Belastung stetig bis zum Maximum ansteigt. Die erfindungsgemäßeKonstruktion erlaubt es, eine Vielzahl von Zwischenscheiben zu verwenden, wodurch die Wandstärke des Behandlungsrohres herabsetzbar ist, so daß ein besserer und schnellerer Wärmeübergang bei indirekter Beheizung stattfindet und geringerwertiger Werkstoff eingesetzt werden kann. Auch bei der Anordnung einer Vielzahl von Rohren anstelle eines einzigen Behandlungsrohres entstehen keinerlei Probleme. Die Rohre werden in aller Regel an der fixierten Scheibe befestigt; zusätzlich können sie auch an den anderen Scheiben befestigt sein. Die Zapfen sind wegen der hohen Flächenpressung vorzugsweise als Kufen oder Gleitsteine ausgebildet, wobei jedoch die Seitenflächen die Gleitflächen darstellen. Entsprechend ist bei der Materialauswahl für die Zapfen und die Gleitnuten auf die hohe Belastung der Seitenflächen zu achten.During the rotation of the rotary tube, the contact surfaces of the pins and sliding grooves during one turn rotation periodically loaded up to a maximum and also completely relieved. The edge of the fixed disk engages in an annular groove in the outer jacket, which lies in a plane perpendicular to the longitudinal axis of the tube. The groove must be deep enough to absorb the radial thermal expansion of the disc. The width of the groove should be selected so that the washer is not clamped under the operating conditions. The other sliding grooves allow the longitudinal displacement of the engaging pins and their expansion in the radial direction due to their axially parallel arrangement. During one revolution is therefore not worn, the use ehandlungsrohr from the B and existing the discs by the end faces of the pins but which rest by their edges on the walls of the slide grooves. Each pin is completely relieved during its vertical position, ie in the lower and upper position, while its load increases steadily up to the maximum towards the horizontal position. The construction according to the invention makes it possible to use a large number of intermediate disks, as a result of which the wall thickness of the treatment tube can be reduced, so that better and faster heat transfer takes place with indirect heating and lower-quality material can be used. Even with the arrangement of a plurality of tubes instead of a single treatment tube, no problems arise. The pipes are usually attached to the fixed disc; in addition, they can also be attached to the other panes. Because of the high surface pressure, the pins are preferably designed as runners or sliding blocks, but the Side surfaces that represent sliding surfaces. Accordingly, when selecting the material for the pins and the sliding grooves, attention must be paid to the high load on the side surfaces.

In der Zeichnung ist das erfindungsgemäße Drehrohr rein schematisch in einem Ausführungsbeispiel dargestellt und nachstehend näher erläutert. Es zeigen:

  • Fig. 1 das Drehrohr im Schnitt gemäß Linie A-B in Fig. 2;
  • Fig. 2 einen Schnitt durch das Drehrohr gemäß Linie C-D in Fig. 1;
  • Fig. 3 die Einzelheit E aus Fig. 2 in vergrößerter Darstellung und
  • Fig. 4 einen Schnitt durch die Einzelheit E gemäß Linie F-G in Fig. 3.
In the drawing, the rotary tube according to the invention is shown purely schematically in one embodiment and explained in more detail below. Show it:
  • Figure 1 shows the rotary tube in section along line AB in Fig. 2.
  • Figure 2 shows a section through the rotary tube according to line CD in Fig. 1.
  • Fig. 3 shows the detail E of FIG. 2 in an enlarged view and
  • 4 shows a section through the detail E according to line FG in FIG. 3.

Das eigentliche Drehrohr 1 besteht aus einem mit einer feuerfesten Ausmauerung 2 versehenen Außenmantel 3 und einem darin gehaltenen Einsatz 4. Durch ein starr angeordnetes Kopfstück 5 ist eine Brennerlanze 6 und ein Gutaufgaberohr 7 geführt. Ein weiteres, in Achsrichtung des Drehrohres 1 verschiebbares Kopfstück 8 ist am anderen Ende des Drehrohres 1 angeordnet. Es ist mit auf Schienen 9 laufenden Rollen 10 versehen und weist im unteren Teil eine Gutaustrittsöffnung 11 und im oberen Teil eine Gasaustrittsöffnung 12 auf.The actual rotary tube 1 consists of an outer jacket 3 provided with a refractory lining 2 and an insert 4 held therein. A torch lance 6 and a feed tube 7 are passed through a rigidly arranged head piece 5. Another head piece 8, which is displaceable in the axial direction of the rotary tube 1, is arranged at the other end of the rotary tube 1. It is provided with rollers 10 running on rails 9 and has a material outlet opening 11 in the lower part and a gas outlet opening 12 in the upper part.

Der Außenmantel 3 ist mit Laufringen 13 versehen, die auf Rollenlagern 14 ruhen. Der Antrieb, der über Zahnkranz und Ritzel oder direkt angetriebene Rollen erfolgt, ist nicht dargestellt. Zum Kopfstück 5 hin weist der Außenmantel 3 eine Ringnut 15 auf. Desweiteren sind in bestimmten Abständen in Längsrichtung vier über den Umfang verteilte Gleitnuten 16 vorgesehen, die durch am Außenmantel angeschweißte starke Bleche 17 gebildet sind. Letztere sind noch durch Stützen 18 (Fig. 3) gesichert.The outer jacket 3 is provided with races 13, which rest on roller bearings 14. The drive that over tooth ring and pinion or directly driven rollers is not shown. The outer jacket 3 has an annular groove 15 toward the head piece 5. Furthermore, four circumferential sliding grooves 16 are provided at certain intervals in the longitudinal direction, which are formed by strong sheets 17 welded to the outer jacket. The latter are still secured by supports 18 (Fig. 3).

Der Einsatz 4 besteht aus einer fixierten Stirnscheibe 19, deren Rand in die Ringnut 15 eingreift, sowie aus einer weiteren Stirnscheibe 20, den Zwischenscheiben 21 (es ist nur eine dargestellt) und den in den Scheiben 19,20,21 gelagerten Behandlungsrohren 22. Die Stirnscheibe 19 trägt außenseitig einen Beschickungsring 23, in den das Gutaufgaberohr 7 mündet. Die Tiefe der Ringnut 15 ist auf den unter dem Wärmeeinfluß größten Durchmesser der Stirnscheibe 19 so abgestimmt, daß noch ein Spalt vorhanden bleibt. Die Breite der Ringnut 15 ist geringfügig größer als die Dicke des Randes der eingreifenden Stirnscheibe 19, damit die Stirnscheibe 19 bei Rotation des Einsatzes 4 sich frei drehen kann, aber in Längsrichtung gesehen doch ausreichend in der Position gehalten ist. Die Scheiben 20,21 weisen als Gleitsteine 24 ausgebildete angeschweißte Zapfen auf, die durch Abstützungen 25 (Fig. 4) verstärkt sind. Die Gleitsteine 24 greifen in die Gleitnuten 16 ein; deren Tiefe und Breite ist auf die größte zu erwartende Wärmedehnung der Scheiben 20,21 bzw. der Gleitsteine 24 abgestimmt, um auch im Extremfall noch eine Gleitbewegung sicherzustellen. Die Stirnscheibe 19 weist öffnungen 26 für das Füllen der Behandlungsrohre 22 auf, sowie eine zentrale Öffnung 27, durch die die Brennerlanze 6 hindurchragt. Die Scheiben 20,21 sind mit Durchbrüchen 28 zum Durchzug der Gase versehen.The insert 4 consists of a fixed end plate 19, the edge of which engages in the annular groove 15, and of a further end plate 20, the intermediate plates 21 (only one is shown) and the treatment tubes 22 mounted in the plates 19, 20, 21 Face disk 19 carries on the outside a loading ring 23 into which the feed tube 7 opens. The depth of the annular groove 15 is matched to the largest diameter of the face plate 19 under the influence of heat so that a gap still remains. The width of the annular groove 15 is slightly larger than the thickness of the edge of the engaging face plate 19 so that the face plate 19 can rotate freely when the insert 4 rotates, but is sufficiently held in position in the longitudinal direction. The disks 20, 21 have welded pins configured as sliding blocks 24, which are reinforced by supports 25 (FIG. 4). The sliding blocks 24 engage in the sliding grooves 16; their depth and width are matched to the greatest thermal expansion to be expected of the disks 20, 21 or the sliding blocks 24 in order to ensure a sliding movement even in extreme cases. The face plate 19 has openings 26 for the filling of the treatment tubes 22 and a central opening 27 through which the burner lance 6 projects. The disks 20, 21 are provided with openings 28 for the passage of the gases.

Claims (2)

1) Drehrohr mit einem Außenmantel und mindestens einem darin angeordneten wärmebeaufschlagbaren Behandlungsrohr, das in Stirnscheiben und gegebenenfalls Zwischenscheiben gehalten ist, wobei diese Scheiben am Außenmantel abgestützt sind, dadurch gekennzeichnet, daß eine der Scheiben (19) in axialer Richtung fixiert ist, jedoch in radialer Richtung bewegbar geführt ist, und daß mindestens n-1 Scheiben (20,21) mindestens je drei in radialer Richtung weisende Zapfen (24) aufweisen, die in zugeordnete, am Außenmantel (3) vorgesehene und sich achsparallel erstreckende Gleitnuten (16) eingreifen, wobei diese Gleitnuten (16) eine solche Länge und Tiefe aufweisen, daß die infolge der Wärmedehnung des Behandlungsrohres (22) zu erwartenden Verschiebungen der Zapfen (24) in den verschiedenen Richtungen, aufnehmbar sind.1) Rotary tube with an outer jacket and at least one heat-treatable treatment tube arranged therein, which is held in end disks and optionally intermediate disks, these disks being supported on the outer jacket, characterized in that one of the disks (19) is fixed in the axial direction, but in the radial one Is guided so that it can move, and that at least n-1 disks (20, 21) each have at least three pins (24) pointing in the radial direction, which engage in assigned sliding grooves (16) provided on the outer casing (3) and extending axially parallel, these sliding grooves (16) have such a length and depth that the displacements of the pins (24) to be expected in the various directions due to the thermal expansion of the treatment tube (22) can be absorbed. 2) Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zapfen (24) am Außenmantel (3) und die Gleitnuten (16) an den Scheiben (20,21) vorgesehen sind.2) Device according to claim 1, characterized in that the pins (24) on the outer jacket (3) and the sliding grooves (16) on the disks (20, 21) are provided.
EP80101593A 1979-04-12 1980-03-26 Rotary drum having at least one tubular heat accumulator arranged therein Expired EP0017811B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2914965 1979-04-12
DE19792914965 DE2914965A1 (en) 1979-04-12 1979-04-12 TURNTUBE

Publications (2)

Publication Number Publication Date
EP0017811A1 true EP0017811A1 (en) 1980-10-29
EP0017811B1 EP0017811B1 (en) 1982-03-17

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ID=6068234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101593A Expired EP0017811B1 (en) 1979-04-12 1980-03-26 Rotary drum having at least one tubular heat accumulator arranged therein

Country Status (4)

Country Link
US (1) US4260372A (en)
EP (1) EP0017811B1 (en)
DE (2) DE2914965A1 (en)
ES (1) ES8101259A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002773A1 (en) * 1990-08-01 1992-02-20 Trevor James Keirle Rotary heat-treatment apparatus

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DE3815104A1 (en) * 1988-05-04 1989-11-09 Deutag Mischwerke Gmbh TURNING OVEN FOR DRYING AND / OR MIXING MATERIAL
US5217578A (en) * 1989-05-22 1993-06-08 Alberta Oil Sands Technology And Research Authority Dry thermal processor
DE4341314A1 (en) * 1993-12-03 1995-06-08 Krupp Polysius Ag Rotary drum, in partic. for drum or tube mill for crushing loose materials
NO306837B1 (en) * 1998-01-15 1999-12-27 Kvaerner Tech & Res Ltd Tube heat exchanger for heating, drying or cooling of liquid or dry bulk materials
FI105130B (en) * 1998-04-17 2000-06-15 Kumera Corp steam dryer

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GB534605A (en) * 1939-03-30 1941-03-11 British Thomson Houston Co Ltd Improvements relating to tubular condensers
US3039753A (en) * 1958-05-16 1962-06-19 Stora Kopparbergs Bergslags Ab Rotary furnace with tubular heat exchanger and method for heat exchange
GB906595A (en) * 1959-04-15 1962-09-26 Smidth & Co As F L Improvements relating to rotary kilns
FR1573762A (en) * 1968-06-19 1969-07-04

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US712258A (en) * 1902-04-07 1902-10-28 Alfred G Campbell Drier for ores, & c.
US740607A (en) * 1903-06-13 1903-10-06 John E Turney Drier.
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US3975002A (en) * 1972-09-05 1976-08-17 Mendenhall Robert Lamar Process and apparatus for recycle of asphalt-aggregate compositions
US3852892A (en) * 1974-05-06 1974-12-10 D Sheehan Rotary drum dryer
US4146975A (en) * 1977-06-06 1979-04-03 Fives-Cail Babcock Rotating heat exchanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE250553C (en) *
GB534605A (en) * 1939-03-30 1941-03-11 British Thomson Houston Co Ltd Improvements relating to tubular condensers
US3039753A (en) * 1958-05-16 1962-06-19 Stora Kopparbergs Bergslags Ab Rotary furnace with tubular heat exchanger and method for heat exchange
GB906595A (en) * 1959-04-15 1962-09-26 Smidth & Co As F L Improvements relating to rotary kilns
FR1573762A (en) * 1968-06-19 1969-07-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002773A1 (en) * 1990-08-01 1992-02-20 Trevor James Keirle Rotary heat-treatment apparatus

Also Published As

Publication number Publication date
ES490481A0 (en) 1980-12-01
DE3060226D1 (en) 1982-04-15
EP0017811B1 (en) 1982-03-17
DE2914965A1 (en) 1980-10-23
ES8101259A1 (en) 1980-12-01
US4260372A (en) 1981-04-07

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