DE3516191C1 - Method and device for the thermal stripping of coated bulk materials - Google Patents

Method and device for the thermal stripping of coated bulk materials

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Publication number
DE3516191C1
DE3516191C1 DE19853516191 DE3516191A DE3516191C1 DE 3516191 C1 DE3516191 C1 DE 3516191C1 DE 19853516191 DE19853516191 DE 19853516191 DE 3516191 A DE3516191 A DE 3516191A DE 3516191 C1 DE3516191 C1 DE 3516191C1
Authority
DE
Germany
Prior art keywords
thermal
infrared
stripping
sands
radiation
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.)
Expired - Lifetime
Application number
DE19853516191
Other languages
German (de)
Inventor
Gerd Dipl.-Ing. 7448 Wolfschlugen Pritschow
Franz 7064 Remshalden Reimer
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Individual
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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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to DE19853516191 priority Critical patent/DE3516191C1/en
Priority to PCT/EP1986/000264 priority patent/WO1986006663A1/en
Priority to EP19860903310 priority patent/EP0220300A1/en
Priority to AU59926/86A priority patent/AU5992686A/en
Application granted granted Critical
Publication of DE3516191C1 publication Critical patent/DE3516191C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C5/00Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/08Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying

Abstract

In order to effect in compact and inexpensive installations a cost-efficient thermal cleansing of pulverulents, particularly foundry sands, with a good adaptability as to quantities and operation time, the pulverulent is supplied in dosed thin layer on top of plates which act as surface of light or infra-red radiation, or let these types of radiation pass through, in which case the source of radiations is situated under the plate. A modular construction enables a decentralized utilization or an extension, as needed.

Description

Es zeigt F i g. 1 Prinzip der- Entschichtung bei Verwendung eines Gas-Infrarot-Strahlers. Es bedeuten: a = Brennerplatte, z. B. Poröskeramik b = Gasbrennergehäuse Fig. 2 Prinzip der Entschichtung bei Verwendung eines Bodens, der für Infrarot- oder Hellstrahlen durchlässig ist Es bedeuten: c = strahlungsdurchlässige Platte, z. B. Quarzglas d = Strahlungsquelle für Infrarot- oder Hellstrahlung F i g. 3 Prinzip der Entschichtung bei Verwendung eines Gas-lnfrarot-Strahlers als Förderrinne. Es bedeuten: e = Brennerplatte, z. B. Poröskeramik mit Seitenbegrenzung als Rinne f = Gasbrennergehäuse, eventuell mit zusätzlicher Heißluftzufuhr g = Abdeckhaube zum Sammeln der Abgase h = Abgas-Abzug, eventuell zur Abgas-Nachverbrennung bzw. Abgasreinigung. Für optimalen Energieeinsatz kann das heiße Abgas zur Schüttgutvorwärmung und zur Erzeugung der zusätzlichen Heißluft für den Brenner (f) verwendet werden.It shows F i g. 1 Principle of decoating when using a Gas infrared emitter. It means: a = burner plate, z. B. Porous ceramic b = gas burner housing Fig. 2 Principle of stripping when using a floor that is suitable for infrared or light rays are transparent. The following meanings: c = radiation-transparent plate z. B. quartz glass d = radiation source for infrared or bright radiation F i g. 3 principle the stripping when using a gas infrared radiator as a conveyor trough. It mean: e = burner plate, e.g. B. Porous ceramics with side delimitation as a channel f = Gas burner housing, possibly with additional hot air supply g = cover hood for Collection of exhaust gases h = exhaust gas extraction, possibly for exhaust gas afterburning or exhaust gas purification. For optimal The hot exhaust gas can be used to preheat the bulk material and used to generate the additional hot air for the burner (f).

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Claims (1)

Patentansprüche: 1. Verfahren zur thermischen Entschichtung umhüllter Schüttgüter durch Oxydation, z. B. bei Gießerei-Formstoffen, dadurch gekennzeichnet, daß die zu entschichtenden Schüttgüter in einer dosierten dünnen Schicht über Böden (a, c) geleitet werden, die direkt als Infrarot- oder Hellstrahlflächen wirken bzw. für solche Strahlungen durchlässig sind, wobei sich in letzterem Falle die Strahlungsquelle unterhalb des Bodens befindet 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Schüttgut direkt über die den Boden bildende Brennerplatte (a) eines Gas-lnfrarot-Strahlers geleitet wird.Claims: 1. Process for the thermal stripping of coated Bulk goods by oxidation, e.g. B. in foundry molding materials, characterized in that that the bulk goods to be stripped in a metered thin layer over floors (a, c), which act directly as infrared or light-emitting surfaces or for such radiation are permeable, in the latter case the radiation source 2. The method according to claim 1, characterized in that that the bulk material directly over the burner plate (a) of a gas-infrared radiator, which forms the bottom is directed. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, bei dem das Schüttgut über eine infrarot- bzw. hellstrahlendurchlässige Bodenplatte (c), z. B. Quarzglas geleitet wird, dadurch gekennzeichnet, daß unter diesem Boden Gas-Infrarot-oder elektrische Infrarot- bzw. Hellstrahler angeordnet sind. 3. Apparatus for performing the method according to claim 1, at which the bulk goods over an infrared or light-ray permeable base plate (c) e.g. B. quartz glass is passed, characterized in that under this floor Gas infrared or electric infrared or light radiators are arranged. 4 Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Boden (a, c) den Boden einer Förderrinne bildet 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Förderrinne einen Schwingantrieb aufweist. 4 device for performing the method according to claim 1 or 2, characterized in that the bottom (a, c) forms the bottom of a conveyor trough 5. Apparatus according to claim 4, characterized in that the conveyor trough a Has oscillating drive. Die Erfindung betrifft die thermische Entschichtung umhüllter Schüttgüter nach dem Oberbegriff des Anspruchs 1. The invention relates to the thermal stripping of coated bulk goods according to the preamble of claim 1. Das Verfahren ermöglicht die vollständige Entfernung der Umhüllung von Schüttgütern durch thermischen Einfluß. Das Endprodukt ist z. B. bei Gießereisanden ein wiederverwendbarer Formsand mit minimalen Verunreinigungen. Zur Herstellung von Präzisionsguß sind solche reinen Sande notwendig. Die Erfindung kann durch ihren modularen Aufbau auf einfache Weise jeder Kapazitätsanforderung angepaßt werden. Diese Möglichkeit besteht bei herkömmlichen Anlagen nicht. The method enables the envelope to be completely removed of bulk solids due to thermal influence. The end product is e.g. B. in foundry sands a reusable molding sand with minimal contamination. For the production Such pure sands are necessary for precision casting. The invention can through their modular structure can be easily adapted to any capacity requirement. This option does not exist with conventional systems. Zur Entschichtung sind gegenwärtig zwei Verfahren gebräuchlich: a) mechanische Entschichtung b) thermische Entschichtung Die thermische Entschichtung erfolgt gegenwärtig in Wirbelschichtöfen mit verhältnismäßig großem Inhalt (Schüttgut und Brennraum). Two methods are currently used for stripping: a) mechanical decoating b) thermal decoating The thermal decoating is currently carried out in fluidized bed furnaces with a relatively large content (bulk material and combustion chamber). Bei der mechanischen Entschichtung bleiben zwangsläufig Umhüllungsreste am Schüttgut haften. Z. B. können mechanisch gereinigte Gießereisande zur Herstellung von Qualitätsgußteilen nicht verwendet werden. During the mechanical stripping process, coating residues inevitably remain adhere to the bulk material. For example, mechanically cleaned foundry sands can be used for production cannot be used by quality castings. Zwangsläufig kann für diese Fälle nur die thermische Entschichtung in Frage kommen. Die bisher angebotenen Verfahren erfordern aber einen so hohen lnvestitionsaufwand, daß diese Form der Sandrückgewinnung für die Mehrheit der Gießereien unerschwinglich ist Kleinere Gießereien sind daher gezwungen, gebrauchte Formsande auf Mülldeponien abzulagern und stets neue Sande zu verwenden Die bestehenden Umweltschutzauflagen erschweren dieses Verfahren zunehmend.Inevitably, only thermal stripping can be used in these cases come into question. The methods offered so far, however, require such a high one Capital expenditure that this form of sand reclamation for the majority of foundries is unaffordable Smaller foundries are therefore forced to use used molding sands to dump in landfills and always use new sands. The existing environmental protection regulations make this process increasingly difficult. Die bestehenden thermischen Formsand-Rückgewinnungsanlagen haben außerdem den gravierenden Nachteil, daß sie unterschiedlich anfallenden Mengen entweder gar nicht oder nur mit äußerst schlechtem Wirkungsgrad angepaßt werden können. Dieser Nachteil ist bedingt durch die bei allen Verfahren typische Aufbereitung von kompakten Mengen in einer thermischen Zentraleinheit. Sie entsprechen in keiner Weise der heute geforderten Flexibilität von Produktionsanlagen. Bauweisebedingt ist auch ein hoher Energieaufwand erforderlich. The existing thermal molding sand recovery systems have also the serious disadvantage that they either occur in different amounts cannot be adapted at all or only with extremely poor efficiency. This The disadvantage is due to the typical preparation of compacts in all processes Quantities in a thermal central unit. They in no way correspond to the the flexibility of production systems required today. Is also due to the construction a high expenditure of energy is required. Der Erfindung liegt die Aufgabe zugrunde, ein preiswertes, flexibles und einfach veränderten Anforderungen anpaßbares thermisches Entschichtungs-System für Schüttgüter anzubieten, das mit einem geringen Primär-Energie-Aufwand auskommt. The invention is based on the object of an inexpensive, flexible and thermal stripping system that can be easily adapted to changing requirements for bulk goods that get by with a low primary energy consumption. Diese Aufgabe wird dadurch gelöst, daß das zu entschichtende Schüttgut in einer dosierten, dünnen-Schicht über Böden geleitet wird, die direkt als Infrarot-oder Hellstrahlflächen wirken bzw. für solche Strahlungen durchlässig sind, wobei sich in diesem Falle die Strahlungsquelle unterhalb des Bodens befindet. Diese Böden können in jeder geforderten Größe hergestellt bzw. jeder geforderten Kapazität einfach angepaßt werden. Der modulartige Aufbau der Einzelkomponenten ermöglicht durch Aneinanderreihen diese hohe Flexibilität Das Verfahren arbeitet, bedingt durch die sehr dünne Schüttgutschicht in einer flachen Hochtemperaturzone, sehr energiearm. This object is achieved in that the bulk material to be stripped in a dosed, thin layer is passed over floors, which is directly called infrared or Bright radiation surfaces act or are permeable to such radiation, whereby in this case the radiation source is below the ground. These floors can be produced in any required size or simply in any required capacity be adjusted. The modular structure of the individual components is made possible by stringing them together this high flexibility The process works due to the very thin bulk material layer in a flat high temperature zone, very low in energy. Die Anlage können sehr klein und kompakt ausgeführt werden. Im Allgemeinen ist es mit dieser Anlage möglich, die Regenerierung an der Verwendungsstelle dezentral vorzunehmen. Auch das Aufstellen von mehreren Einzelanlagen geringer Leistung anstelle einer zentralen Regenerierungsanlage ist preiswert durchzuführen, wobei sich erhebliche Zwischentransportkosten einsparen lassen. The systems can be made very small and compact. In general it is possible with this system to decentralize the regeneration at the point of use to undertake. Also the installation of several individual systems with low output instead a central regeneration system is inexpensive to carry out, with considerable Save intermediate transport costs. Insgesamt ergibt sich für die Wartung und Betriebssicherheit ein nicht unwesentlicher Vorteil durch Verwendung handelsüblicher Bauteile. Dies trifft besonders zu bei der Ausführung mit Gas-Infrarot-Strahlern. Overall, there is a for maintenance and operational safety not insignificant advantage through the use of commercially available components. This is true especially for the version with gas infrared emitters. Das Funktionsprinzip ist in der Zeichnung dargestellt. The functional principle is shown in the drawing.
DE19853516191 1985-05-06 1985-05-06 Method and device for the thermal stripping of coated bulk materials Expired - Lifetime DE3516191C1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19853516191 DE3516191C1 (en) 1985-05-06 1985-05-06 Method and device for the thermal stripping of coated bulk materials
PCT/EP1986/000264 WO1986006663A1 (en) 1985-05-06 1986-05-05 Method and device for thermal cleansing of covered pulverulents
EP19860903310 EP0220300A1 (en) 1985-05-06 1986-05-05 Method and device for thermal cleansing of covered pulverulents
AU59926/86A AU5992686A (en) 1985-05-06 1986-05-05 Method and device for thermal cleansing of covered pulverulents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853516191 DE3516191C1 (en) 1985-05-06 1985-05-06 Method and device for the thermal stripping of coated bulk materials

Publications (1)

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DE3516191C1 true DE3516191C1 (en) 1990-11-15

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DE19853516191 Expired - Lifetime DE3516191C1 (en) 1985-05-06 1985-05-06 Method and device for the thermal stripping of coated bulk materials

Country Status (4)

Country Link
EP (1) EP0220300A1 (en)
AU (1) AU5992686A (en)
DE (1) DE3516191C1 (en)
WO (1) WO1986006663A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265707A2 (en) * 1986-10-27 1988-05-04 Förder- und Anlagentechnik GmbH Method of and device for thermo-mechanical regeneration of bulk goods especially foundry returned sand

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1128942B (en) * 1955-01-25 1962-05-03 Artemas De Forest Holden Gas furnace for surface combustion
GB976933A (en) * 1960-02-18 1964-12-02 Emile Muller Soc Ets Improvements in furnaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668364A (en) * 1950-10-27 1954-02-09 Dry Freeze Corp Drying of materials by infrared radiation
DE2221394B1 (en) * 1972-05-02 1973-10-31 Schenck Gmbh Carl METHOD AND DEVICE FOR THE REGENERATION OF MOLDING SAND ADHED TO FLAMMABLE FOREIGN MATERIALS
DE2318079A1 (en) * 1973-04-11 1974-10-31 Buderus Eisenwerk Heat-treating refuse in oscillating conveyor - with radiator arranged over it, esp. for foundry sand
DE2408215C2 (en) * 1974-02-21 1983-02-03 Adolf A. Fleischmann Inh. Werner Fleischmann, 6000 Frankfurt Balancing machine for the regeneration of synthetic resin-bonded foundry sand
FR2306765A1 (en) * 1975-04-08 1976-11-05 Arras Maxei Coated powder reclamation plant esp. for used shell moulding sand - by feeding crushed sand down calcining chamber so phenolic resin binder is evaporated

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1128942B (en) * 1955-01-25 1962-05-03 Artemas De Forest Holden Gas furnace for surface combustion
GB976933A (en) * 1960-02-18 1964-12-02 Emile Muller Soc Ets Improvements in furnaces

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE-Z: Gießerei-Erfahrungsautausch, April 1985, S. 131 *
Schied's Adressen-Taschenbuch, Ausg. 1983/84, S. 740 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265707A2 (en) * 1986-10-27 1988-05-04 Förder- und Anlagentechnik GmbH Method of and device for thermo-mechanical regeneration of bulk goods especially foundry returned sand
DE3636479A1 (en) * 1986-10-27 1988-05-05 Foerder & Anlagentechnik Gmbh METHOD AND ARRANGEMENT FOR THE THERMO-MECHANICAL REGENERATION OF SCHUETTGUETE, ESPECIALLY OF FOUNDRY OLD SAND
EP0265707A3 (en) * 1986-10-27 1988-08-17 Foerder & Anlagentech Gmbh Method of and device for thermo-mechanical regeneration of bulk goods especially foundry returned sand

Also Published As

Publication number Publication date
WO1986006663A1 (en) 1986-11-20
AU5992686A (en) 1986-12-04
EP0220300A1 (en) 1987-05-06

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D3 Patent maintained restricted (no unexamined application published)
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