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WO1986006663A1 - Procede et dispositif de decapage thermique de pulverulents enrobes - Google Patents

Procede et dispositif de decapage thermique de pulverulents enrobes Download PDF

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Publication number
WO1986006663A1
WO1986006663A1 PCT/EP1986/000264 EP8600264W WO8606663A1 WO 1986006663 A1 WO1986006663 A1 WO 1986006663A1 EP 8600264 W EP8600264 W EP 8600264W WO 8606663 A1 WO8606663 A1 WO 8606663A1
Authority
WO
WIPO (PCT)
Prior art keywords
infrared
passed
gas
pulverulents
thermal
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.)
Ceased
Application number
PCT/EP1986/000264
Other languages
German (de)
English (en)
Inventor
Gerd Pritschow
Franz Reimer
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 WO1986006663A1 publication Critical patent/WO1986006663A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying

Definitions

  • the invention relates to the thermal stripping of coated bulk goods according to the preamble of claim 1.
  • the method enables the covering of bulk materials to be completely removed by thermal influence.
  • the end product is e.g. in foundry sand, a reusable molding sand with minimal contamination. Such pure sands are necessary for the production of precision casting. Due to its modular structure, the invention can be easily adapted to any capacity requirement. This is not possible with conventional systems.
  • Thermal stripping is currently carried out in fluidized bed furnaces with a relatively large content (bulk material and combustion chamber).
  • IfiSATZB ⁇ TT requirements make this procedure increasingly difficult.
  • the existing thermal Formsa ⁇ d recovery systems also have the serious disadvantage that they can either not be adjusted at all or that they can only be adapted with extremely poor efficiency. This disadvantage is due to the typical processing of compact quantities in all processes in a thermal central unit. In no way do they correspond to the flexibility of production plants required today. Due to the design, a high energy expenditure is also required.
  • the invention has the object of providing a sch ⁇ cheap, flexible and easy changing demands adaptable thermal decoating system for bulk materials Anlagenb 'ieten that with a low primary mar-energy effort gets along.
  • the bulk material to be stripped is passed in a metered, thin layer over floors which act directly as infrared or light ray surfaces or are transparent to such radiation, in which case the radiation source is below of the floor.
  • floors can be made in any required size.
  • the modular structure of the individual components enables this high flexibility by stringing them together. Due to the very thin layer of bulk material in a flat high-temperature zone, the process works very low in energy.
  • the systems can be made very small and compact. In general, this system makes it possible to carry out regeneration locally at the point of use. The erection of several individual low-power plants instead of a central regeneration plant can also be carried out inexpensively, and considerable intermediate transport costs can be saved.
  • Fig. 1 principle of stripping when using a gas infrared radiator. This means: 1 _ burner plate, eg porous ceramic 2 * _ gas burner housing
  • Fig. 2 Principle of stripping when using a floor that is transparent to infrared or light rays. It means:
  • Burner plate e.g. Porous ceramics with side boundaries as a channel
  • Gas burner housing possibly with an additional hot air supply 7 Cover hood for collecting the exhaust gases 8 Exhaust gas exhaust, possibly for exhaust gas afterburning or exhaust gas purification.
  • the hot exhaust gas can be used for preheating bulk goods and for generating the additional hot air for the burner (6)

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tunnel Furnaces (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Afin de réaliser, dans des installations compactes et peu coûteuses, un décapage thermique rentable de pulvérulents, notamment de sables de fonderie, avec une grande souplesse d'adaptation au niveau des quantités débitées et de la durée d'utilisation, le pulvérulent est amené en une mince couche dosée au-dessus de plateaux qui font office de surface de rayonnement infrarouge ou lumineux, ou bien laissent passer ces types de rayonnement, auquel cas la source de radiations est située au-dessous du plateau. Une construction modulaire permet une utilisation décentralisée ou une extension à volonté.
PCT/EP1986/000264 1985-05-06 1986-05-05 Procede et dispositif de decapage thermique de pulverulents enrobes Ceased WO1986006663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853516191 DE3516191C1 (de) 1985-05-06 1985-05-06 Verfahren und Vorrichtung zur thermischen Entschichtung umhuellter Schuettgueter
DEP3516191.4 1985-05-06

Publications (1)

Publication Number Publication Date
WO1986006663A1 true WO1986006663A1 (fr) 1986-11-20

Family

ID=6269925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1986/000264 Ceased WO1986006663A1 (fr) 1985-05-06 1986-05-05 Procede et dispositif de decapage thermique de pulverulents enrobes

Country Status (4)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3636479A1 (de) * 1986-10-27 1988-05-05 Foerder & Anlagentechnik Gmbh Verfahren und anordnung zur thermo-mechanischen regenerierung von schuettguetern, insbesondere von giesserei-altsand

Citations (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 (de) * 1972-05-02 1973-10-31 Schenck Gmbh Carl Verfahren und vorrichtung zur regenerierung von mit brennbaren fremdstoffen behaftetem formsand
DE2318079A1 (de) * 1973-04-11 1974-10-31 Buderus Eisenwerk Vorrichtunggzur thermischen behandlung von schuettguetern
DE2408215B1 (de) * 1974-02-21 1975-07-03 Fleischmann Adolf A Fa Wuchtfoerdermaschine zum Regenerieren von kunstharzgebundenem Giesserei-Altsand
FR2306765A1 (fr) * 1975-04-08 1976-11-05 Arras Maxei Installation pour la recuperation de matieres pulverulentes enrobees, utilisees notamment en fonderie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1128942B (de) * 1955-01-25 1962-05-03 Artemas De Forest Holden Gasofen fuer Oberflaechenverbrennung
FR1259396A (fr) * 1960-02-18 1961-04-28 Emile Muller Soc Nouv Ets Perfectionnements apportés aux fours industriels ou autres

Patent Citations (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 (de) * 1972-05-02 1973-10-31 Schenck Gmbh Carl Verfahren und vorrichtung zur regenerierung von mit brennbaren fremdstoffen behaftetem formsand
DE2318079A1 (de) * 1973-04-11 1974-10-31 Buderus Eisenwerk Vorrichtunggzur thermischen behandlung von schuettguetern
DE2408215B1 (de) * 1974-02-21 1975-07-03 Fleischmann Adolf A Fa Wuchtfoerdermaschine zum Regenerieren von kunstharzgebundenem Giesserei-Altsand
FR2306765A1 (fr) * 1975-04-08 1976-11-05 Arras Maxei Installation pour la recuperation de matieres pulverulentes enrobees, utilisees notamment en fonderie

Also Published As

Publication number Publication date
DE3516191C1 (de) 1990-11-15
EP0220300A1 (fr) 1987-05-06
AU5992686A (en) 1986-12-04

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