DE1940358A1 - Prous ceramic insulating structural ele- - ments - Google Patents

Prous ceramic insulating structural ele- - ments

Info

Publication number
DE1940358A1
DE1940358A1 DE19691940358 DE1940358A DE1940358A1 DE 1940358 A1 DE1940358 A1 DE 1940358A1 DE 19691940358 DE19691940358 DE 19691940358 DE 1940358 A DE1940358 A DE 1940358A DE 1940358 A1 DE1940358 A1 DE 1940358A1
Authority
DE
Germany
Prior art keywords
granules
heating
prous
ments
ceramic insulating
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
DE19691940358
Other languages
German (de)
Other versions
DE1940358C3 (en
DE1940358B2 (en
Inventor
auf Nichtnennung P Antrag
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.)
BRONNER HANS DIPL ING
Original Assignee
BRONNER HANS DIPL ING
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 BRONNER HANS DIPL ING filed Critical BRONNER HANS DIPL ING
Priority to DE19691940358 priority Critical patent/DE1940358C3/en
Priority claimed from DE19691940358 external-priority patent/DE1940358C3/en
Publication of DE1940358A1 publication Critical patent/DE1940358A1/en
Publication of DE1940358B2 publication Critical patent/DE1940358B2/en
Application granted granted Critical
Publication of DE1940358C3 publication Critical patent/DE1940358C3/en
Expired legal-status Critical Current

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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
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0038Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

Spherical granulates of expanded caly are heated, so that their surfaces become pyroplastic. They are connected by deformation in an O2-free gas. Spec., the gas is combustion gas from the flames expanding the granulate.

Description

"Verfahren zum Herstellen von porösen, keramischen Bauelementen, insbesondere für Isolierzwecke" Die Erfindung betrifft ein Verfahren zum Herstellen von porösen keramischen Baueleinenten, insbesondere für Isolierzwecke. "Process for the production of porous, ceramic components, especially for insulation purposes "The invention relates to a method of manufacture of porous ceramic components, especially for insulating purposes.

Unter diesen Bauelementen versteht der Fachmann solche porösen, keramischen Erzeugnisse, die über das oft erhebliche Poren-Volumen der üblichen keramischen Körper hinaus illit zahlreichen Hohlräumen durchsetzt sind.The person skilled in the art understands these components to be porous, ceramic ones Products that have the often considerable pore volume of conventional ceramic The body is also riddled with numerous cavities.

Hierbei ist nicht Voraussetziung, daß die gebranate-keramische Masse um den Hohlraum ebenfalls porig ist.Here it is not a prerequisite that the fired ceramic mass around the cavity is also porous.

Dies gilt insbesondere für aus Blähton hergestellte Baueleneite.This applies in particular to building elements made from expanded clay.

Derartige Bauelemente werden z.B. für Bauswecke in solchen Fällen verwendet, wo es auf geringes Gewicht des Mauerwerks ankommt. Ein weiteres wesentliches Anwendungsgebiet ist die Wärmeisolierung.Such components are used, for example, for building purposes in such cases used where there is light weight of the masonry arrives. A Another important area of application is thermal insulation.

Nach der deutschen Patentschrift 918 613 ist es bereits seit Jahrzehnten bekannt, kugelige, mit einer dicht gebrannten Hülle umgebene, im Kern poröse Tonformlinge für die Verwendung als Leichtbetonfüllstoffe zur Einbettung in ein Bindemittel, wie Zement, oder in Zementleim, Zementmörtel oder Beton und Erzielung eines Leichtbetons mit besonders hoher Festigkeit herzustellen.According to German patent specification 918 613, it has been around for decades known, spherical clay moldings, which are surrounded by a tightly fired shell and have a porous core for use as lightweight concrete fillers for embedding in a binder, like cement, or in cement paste, cement mortar or concrete and achieving a lightweight concrete to produce with particularly high strength.

Bei diesem bekannten Verfahren werden die Tonformlinge in einem geschlossenen Arbeitsvorgang bis zur Sinterung gebrannt und mit einer harten, wasserdichten Schale aus Schmelzfluß versehen.In this known method, the clay moldings are closed in one Process burned to sintering and with a hard, waterproof shell provided from melt flow.

In der DAS 1 151 460 wird darüber hinaus vorgeschlagen, Leichtbauelemente, insbesondere Mauersteine, aus sinterfähigem, blähfahigem, körnigem Material in der Weise herzustellen, daß das Gut seine Kornstruktur beibehält.In DAS 1 151 460 it is also proposed to use lightweight construction elements, in particular bricks, made of sinterable, expandable, granular material in the Manufacture in a way that the material retains its grain structure.

Nach diesem Verfahren soll das Blähgut in der Behandlungskammer bei so hoher Temperatur gebläht werden, daß es mindestens in der äußeren Koraschicht pyroplastisch wird, daß es in diesem Zustand aus der Behandlungskammer unmittelbar in Formen eingebracht wird und daß es hierin durch ßtampfen, Rütteln, Pressen od. dgl. verdichtet wird und die pyroplastischen Oberflächen verkleben oder verschmelzen.After this process, the expanded material should be in the treatment chamber at such a high temperature that it is at least in the outer Kora layer That it is pyroplastic in this state from the treatment chamber immediately is introduced into molds and that it od by stamping, shaking, pressing. Like. Is compressed and the pyroplastic surfaces stick or fuse.

Wichtig ist bei diesem Verfähren, das geblahte Gut so schnell in die Formen einzubringen und darin zu verdichten, daß diese Vorgänge noch vor beginnender Erstarrung beendet sind.It is important in this process that the blown goods are quickly put into the To bring in forms and to condense them, that these processes even before the beginning Solidification have ended.

Ein weiterer Vorschlag (DAS 1 181 611) geht dahin, zur Herstellung von Bausteinen den blähfähigen Ton in Teilchenform zu bringen und zu erhitzen, sodaß zumindest die Oberfläche pyroplastisch wird und die auf diese Weise behandelten Teilchen zu Formkörpern zu verpressen.-Durch das Verpressen tritt ein Zusammendrücken der einzelnen Teilchen ein, und hierdurch soll eine keramische Verbindung der Teilchen untereinander erreicht werden, indem die pyroplasti schein Oberflächen aneinander verkleben oder verschmelzen.Another suggestion (DAS 1 181 611) is to manufacture of building blocks to bring the expandable clay into particle form and to heat it, so that at least the surface becomes pyroplastic and those treated in this way Particles to be pressed into molded bodies.-Pressing causes compression of the individual particles, and this is intended to create a ceramic bond between the particles can be achieved by putting the pyroplasti shining surfaces against one another glue or fuse.

Die Praxis hat gezeigt, daß diese huffassu,ng unzutreffend ist, daß vielmehr die Verbindung der Teilchen nur unvollkommen bzw.Practice has shown that this huffassu, ng is incorrect that rather, the connection of the particles is only imperfect or

weniger widerstandsfähig wird, wenn nach der bei allen bekannten Verfahren vorgeschlagenen Arbeitsweise gearbeitet wird, nämlich, lediglich auf die genügende Erhitzung des Blähgutes zu achten.becomes less resistant when following the all known methods Proposed mode of operation is worked, namely, only to the sufficient Pay attention to the heating of the expanded material.

Der Erfindung Liegt die Erkenntnis zugrunde, daß die Beachtung der ausreichenden Erhitzung des Blahgutes für die Erzielung einer hochwertigen keramischen Bindung des Granulats nicht genügt, sondern- daß bei der Verformung der Granulate die Anwesenheit von Sauerstoff das Entstehen einer festen keramischen Verbindung verhindert.The invention is based on the knowledge that compliance with the sufficient heating of the flaked material to achieve a high-quality ceramic Binding of the granules is not sufficient, but rather that when the granules are deformed the presence of oxygen creates a solid ceramic bond prevented.

Die Erfindung bezweckt die Schaffung eines Verfahrens, welches diese Voraussetzungen erfüllt.The invention aims to provide a method which does this Requirements met.

Bei einem Verfahren zum Herstellen von porösen, keramischen Bauelementen, insbesonderefür Isolierzwecke, bei welchem etwa kugelförmige Granulate aus Blähton o. dgl. so weit erhitzt werden, bis ihre Oberflächen pyroplastisch werden und die Granulate alsdann durch Verformen miteinander verbunden werden, wird der Erfindungszweck dadurch erreicht, daß die Granulate beim Verformen von einem praktisch sauerstoff-freien Gas umgeben sind. -Bei entsprechender Behandlung, insbesondere in Bezug auf die Dauer der Erhitzung und/oder die Erhitzungstemperur kann man die Granulat struktur sich völlig auflösen lassen, so daß man einen homogenen, porigen, keramischen körper erhält.In a process for the production of porous, ceramic components, especially for insulation purposes, in which approximately spherical granules made of expanded clay o. The like. To be heated until their surfaces are pyroplastic and the Granules are then connected to one another by deformation, becomes the purpose of the invention achieved by the fact that the granules are practically oxygen-free during deformation Are surrounded by gas. -When treated appropriately, especially in relation to the The duration of the heating and / or the heating temperature can be used to structure the granules can be completely dissolved, so that you get a homogeneous, porous, ceramic body receives.

Erfolgt die Herstellung der keramischen Bauelemente in einer kontinuierlichen Arbeitsweise, so besteht eine bevorzugte Ausführungsform des Verfahrens gemäß der Erfindung darin, da die Gase, welche die Granulate beim Verformen umgeben, aus Heizgasen bestehen, welche von einer Heizflamme praktisch sauerstoff-frei gemacht worden sind.The ceramic components are manufactured in a continuous process Operation, there is a preferred embodiment of the method according to Invention is that the gases that surround the granules during deformation are made up of heating gases exist, which have been made practically oxygen-free by a heating flame.

Bei dieser Üurchführungsart des Verfahrens gemäß der Erfindung wird das Heizgas zweckmäßig der Behandlungskammer entnommen, in weicher das Blähgut bei so hoher Temperatur gebläht wird, bis die Oberflächen der kugelförmigen Granulate pyroplastisch werden. Für die Durchführung- des erfindungsgemäßen Verfahrens ist es gleichgültig, ob die Verformung der Granulate durch Stampfen, Rütteln, Pressen, Walzen od. dgl., also durch Einwirkung von äußeren Kräften erfolgt, oder ob die beim Blahen der Granulate auftretende Expansionskraft die Verformung bewirkte Fur gewisse Fälle genügt sogar der Drupk, mit welchem die Granulate in der Masse neben- und aufeinander liegen, um an den Berührungsstellen ohne besondere Verformung der Granulate mit dem erfindungsgemäßen Verfahren eine ausreichende keramische Bindung zu erzielen.In this implementation of the method according to the invention the heating gas is expediently taken from the treatment chamber, in which the expanded material is at so high temperature is bloated, up the surfaces of the spherical Granules become pyroplastic. For carrying out the method according to the invention it does not matter whether the deformation of the granules by pounding, shaking, pressing, Rolling od. Like., So by the action of external forces, or whether the The expansion force occurring during the expansion of the granules caused the deformation In certain cases, even the Drupk with which the granules in the mass are sufficient and lie on top of each other to at the points of contact without any particular deformation of the Granules with the method according to the invention provide a sufficient ceramic bond to achieve.

Claims (3)

Ansprüche: Expectations: .jVerfahren zum Herstellen von porösen, keramischen Bauelementen, insbesondere für Isolierzwecke, bei welchem vorzugsweise etwa kugelförmige Granulate aus Blähton od. dgl. so weit erhitzt werden,bis ihre Oberflächen pyroplastisch werden und die Granulate alsdann durch Verformen miteinander verbunden werden, dadurch gekennzeichnet, daß die Granulate beim Verformen von einem praktisch sauerstoff-freien Gas umgeben sind..jProcess for the production of porous, ceramic components, especially for insulation purposes, in which preferably approximately spherical granules from expanded clay or the like. Are heated until their surfaces are pyroplastic and the granules are then connected to one another by deforming, thereby characterized in that the granules are formed from a practically oxygen-free Are surrounded by gas. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Gase, welche die Granulate beim Verformen umgeben, aus Heizgasen bestehen, welche von einer Heizflamme praktisch sauerstoff-frei gemacht worden sind. 2. The method according to claim 1, characterized in that the gases, which surround the granules during deformation, consist of heating gases, which from have been made practically oxygen-free using a heating flame. 3. Verfahren nach anspruch 2, dadurch gekennzeichnet, daß die heizgase von der Heizflamme stammen, mit welcher die Granulate gebläht werden. 3. The method according to claim 2, characterized in that the heating gases originate from the heating flame with which the granules are expanded.
DE19691940358 1969-08-08 Process for the production of porous, ceramic, insulating components Expired DE1940358C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691940358 DE1940358C3 (en) 1969-08-08 Process for the production of porous, ceramic, insulating components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691940358 DE1940358C3 (en) 1969-08-08 Process for the production of porous, ceramic, insulating components

Publications (3)

Publication Number Publication Date
DE1940358A1 true DE1940358A1 (en) 1971-02-25
DE1940358B2 DE1940358B2 (en) 1976-07-01
DE1940358C3 DE1940358C3 (en) 1977-02-17

Family

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231998A1 (en) * 1986-01-16 1987-08-12 Arthur Quarmby Building material and method of producing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231998A1 (en) * 1986-01-16 1987-08-12 Arthur Quarmby Building material and method of producing same

Also Published As

Publication number Publication date
DE1940358B2 (en) 1976-07-01

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee