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DE1508543A1 - Conveyor roll for roll stoves - Google Patents

Conveyor roll for roll stoves

Info

Publication number
DE1508543A1
DE1508543A1 DE19661508543 DE1508543A DE1508543A1 DE 1508543 A1 DE1508543 A1 DE 1508543A1 DE 19661508543 DE19661508543 DE 19661508543 DE 1508543 A DE1508543 A DE 1508543A DE 1508543 A1 DE1508543 A1 DE 1508543A1
Authority
DE
Germany
Prior art keywords
roll
roller
conveyor
ovens
stoves
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.)
Pending
Application number
DE19661508543
Other languages
German (de)
Inventor
Fridolin Benischke
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of DE1508543A1 publication Critical patent/DE1508543A1/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/24Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Description

FÖrderrolle für RollenherdÖfen Die Erfindung betrifft ei.ne Förderrolle für RollenherdÖfen, insbesondere Ilochtemperatur- und Schnellbrandöfen. Der-Gegenstand der Erfindung bezweckt die Schaffung einer bei Hochtemperatur-HochleistungsÖfen zum Brand insbesondere von ke-L-amischem Gut verwendbaren Förderrolle aus inetall. Die bei derartigen Üfen nitwendigen Förderrollen mÜssen aus einem Werkstoff bestehen, der eine hohe Resistenz gegen hohe Betriebstemperav turen aufweist und das Brenngut nicht beeinträchtigt. Der Werkstoff soll hiebei außerdem eIne hohe Temperaturwechselbeanspruchbarkeit der Rolle.gewährleistell. Aber auch die im wesentlichen zylindrische Form der Rolle darf nur in einem entsprechenden Toleranzbereich fertigungsbedingte Unregelmäßigkeiten aufweisen, um nicht die gegenseitige Lage der Brenngutteile beim Durchsetzen des Ofens von Rolle zu Rolle zu verändern.Conveyor roller for roller hearth ovens The invention relates to a conveyor roller for roller hearth ovens, in particular Iloch temperature and rapid fire ovens. The object of the invention aims to create a metal conveyor roller that can be used in high-temperature, high-performance ovens for firing, in particular, Ke-L-Amic material. The conveyor rollers necessary for such ovens must be made of a material that is highly resistant to high operating temperatures and does not affect the material to be fired. The material should also ensure that the roll can withstand high temperature changes. But also the essentially cylindrical shape of the roll may only have manufacturing-related irregularities in a corresponding tolerance range, so as not to change the mutual position of the items to be fired from roll to roll when the furnace is pushed through.

Es ist bekannt, bei RolletiherdÖfen FÖrderrollen aus metallischen und/oder keramischen Werkstöffen zu verwenden. Als besonders nachteilig ergibt sich hiebei, daß im Hochtemperaturbereich die Festigkeit der bekannten metallischen Rollen sehr stark abnimmt und durch die Zunderwirkung der bisher verwendeten Rollen aus Lietall das keramische Brenngut sogar unbrauchbar vierden'kann, indessen die hochtemperaturfesten und gegenüber dem Brenngut bzw. Scherben inerte.n keramischen Rollen bei relativ hohen Kosten jedoch nur unter Beeinträchtigung ihrer Temperaturwechselbeständigkeit nachbearbeitbar sind.It is known to use conveyor rollers made of metallic and / or ceramic materials in roller-type hearth ovens. A particularly disadvantageous result is that in the high temperature range the strength of the known metallic rollers decreases sharply and the scale effect of the previously used Lietall rollers can even render the ceramic firing material unusable, while the high temperature resistant and inert to the firing material or cullet. n ceramic rollers can only be reworked at relatively high costs, however, impairing their resistance to temperature changes.

Dem Erfindungegegenstand liegt daher die Aufgabe zugrunde, die Vielzahl der auch für den keramischen Brand verwendeten FÖrderrollen zu verringern, indem eine nachstehend beschriebene Förderrolle geschaffen wird, die auch bei hohen Betriebstemperaturen ihre Festigkeit beibehält, den Scherben sowie die Ofenatmosphäre nicht beeinträchtigt und deren mehr oder weniger langgestreckte Rollenoberfläche bei einem wirtschaftlich tragbaren Köstenaufwand nachbearbeitet werden kann, ohne daß dadurch die GÜte der Rolle beeinträchtigt wird.The object of the invention is therefore based on the multitude decrease of the conveyor rollers also used for the ceramic fire by a conveyor roller described below is created, which also at high operating temperatures retains its strength, does not affect the body or the furnace atmosphere and their more or less elongated roller surface with one economical affordable cost can be reworked without affecting the quality of the Role is impaired.

Die vorgenannte Aufgabe wird durch den nachstehend beschriebenen Erfindungsgegenstand gelÖst. Gegenstand der Erfindung ist demnach eine Förderrolle für RollenherdÖfen, insbesondere Hochtemperatur-und SchnellbrandÖfen, mit der Besonderheit, daL sie aus einem. gegenüber keramischem Brenngut inerten, hochtemperaturfesten,mechanisch stark beanspruchbaren, thermisch hoch wechselbeanspruchbaren Rohr oder Vollstab aus grobkörnigem Siliziumkarbid gebildet ist. Bei der Verfestigung des Scherbens wird nun der Kohlenstoff zumindest aus der Randzone der aus Siliziumkarbid bestehenden Rolle ausgeschieden, ohne hiebei die Oberfläche, insbesondere die Glasur, des Brenngutes vor allem in seiner Färbung zu verändern. Erforderlichenfalls kann der zylindrische Außenmantel dc-r erfindungsgemäßen Förderrolle auch von einem dÜnnen keramischen Uberzug d.h. einer Engobe umgeben sein.The above object is achieved by the subject matter described below solved. The subject of the invention is therefore a conveyor roller for roller hearth furnaces, especially high-temperature and rapid-fire ovens, with the special feature that they are from a. Inert, high-temperature-resistant, mechanically inert to ceramic firing material Heavy-duty, thermally highly alternating tube or solid rod is formed from coarse-grain silicon carbide. When solidifying of the body, the carbon is now made of silicon carbide, at least from the edge zone existing role, without affecting the surface, especially the glaze, to change the color of the material to be fired. If necessary, can the cylindrical outer jacket dc-r conveyor roller according to the invention also from a thin one be surrounded by a ceramic coating i.e. an engobe.

Die erfindungegemäße FÖrderrolle zeichnet sich vor allem durch eine entsprechende Körnigkeit und Kristallstruktur des Rollenwerkstoffes aus, die eine hohe Temperaturwechselbeständigkeit bewirken. So ist z.B. ein Auswechseln von schadhaft gewordenen Förderrollen bei gleichzeitigem Temperaturwechsel praktisch mit keinen nachteiligen Folgen fÜr den Erfindungsgegenstand verbunden, sodaß dieser etwa auftretende Temperaturschwankungen besser aufnimmt als die im allgemeinen aus hochgesinterten Werkstoffen bestehenden keramischen Rollen.The inventive conveyor role is characterized above all by a corresponding granularity and crystal structure of the roller material, the one cause high thermal shock resistance. Replacing, for example, is defective become conveyor rollers with simultaneous temperature change practically with none disadvantageous consequences for the subject matter of the invention, so that this may occur Absorbs temperature fluctuations better than that in general from highly sintered Materials existing ceramic rollers.

Die im wesentlichen aus Siliziumkarbid bestehende Rolle gestattet insbesondere eine Nachbearbeitung ihrer Mantelfläche, um etwaige herstellungebedingte unzulässige Unregelmäßigkeiten oder Krümmungen der brenngutfördernden Oberfläche ausgleichen zu können. So worden z.B. durch Nachschleifen der kantelfläche der Rolle die anderen Rolleneigenschaften nicht verändert und bleibt insbesondere die thermische Wechselbeanspruchbarkeit der FÖrderrolle erhalten.The role, which consists essentially of silicon carbide, is permitted in particular a reworking of its outer surface to avoid any manufacturing-related impermissible irregularities or curvatures of the fuel-conveying surface to be able to compensate. This has been done, for example, by regrinding the edge surface of the roller the other roll properties are not changed and, in particular, the thermal one remains Maintain alternating load capacity of the conveyor roller.

Die Herstellung der Förderrollen kann, wie sie auch bei anderen Gegenständen aus Siliziumkarbid gebräüchlich ist, erfolgen. Die Rollen werden aus handelsüblichem grobkÖrnigem Siliziumkarbid in üblicher Weise mit Zuschlagstoffen verpreßt unü anschlieibend gesintert.The production of the conveyor rollers can be carried out in the same way as for other objects made of silicon carbide is common. The roles are made of commercially available Coarse-grained silicon carbide is pressed in the usual way with aggregates and then pressed sintered.

Claims (2)

2 a t e n t a n s p r,ü c a e : 1. Förderrolle fÜr RollenherdÖfen, insbesondere Hochtemperatur und Schnellbrandöfen, dadurch gekennzeichnet, daß sie aus einem gegenÜber keramischen Brenngut inerten, hochtemperaturfesten, mechanisch stark beanspruchbaren, thermisch hoch wechselbeanspruchbaren Rohr oder Vollstab aus grobkÖrnigem Biliziumkarbid gebildet ist. 2 atentans p r, ü cae : 1. Conveyor roller for roller hearth ovens, especially high-temperature and rapid-firing ovens, characterized in that it is formed from a tube or solid rod made of coarse-grained silicon carbide, which is inert to ceramic firing material, resistant to high temperatures, can withstand high mechanical loads, and can withstand high thermal loads. 2. Förderrolle für Rollenherdöfen, nach Anspruch 1, dadurch g,.kennzeichnet, daß der zylinderförmige Außenmantel der Rolle mit einer Engobe versehen ist.2. Conveyor roller for roller hearth furnaces, according to claim 1, characterized in that the cylindrical outer surface of the roller is provided with an engobe.
DE19661508543 1966-07-06 1966-07-28 Conveyor roll for roll stoves Pending DE1508543A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT645066 1966-07-06

Publications (1)

Publication Number Publication Date
DE1508543A1 true DE1508543A1 (en) 1969-10-30

Family

ID=3586433

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661508543 Pending DE1508543A1 (en) 1966-07-06 1966-07-28 Conveyor roll for roll stoves

Country Status (1)

Country Link
DE (1) DE1508543A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419300A3 (en) * 1989-08-03 1991-12-18 Vesuvius France S.A. Roller with conical shank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419300A3 (en) * 1989-08-03 1991-12-18 Vesuvius France S.A. Roller with conical shank

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