EP1745872A2 - Procédé de traitement de mateiaux de moulage de fondérie - Google Patents

Procédé de traitement de mateiaux de moulage de fondérie Download PDF

Info

Publication number
EP1745872A2
EP1745872A2 EP06012822A EP06012822A EP1745872A2 EP 1745872 A2 EP1745872 A2 EP 1745872A2 EP 06012822 A EP06012822 A EP 06012822A EP 06012822 A EP06012822 A EP 06012822A EP 1745872 A2 EP1745872 A2 EP 1745872A2
Authority
EP
European Patent Office
Prior art keywords
sand
grains
moisture
partial
stream
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.)
Withdrawn
Application number
EP06012822A
Other languages
German (de)
English (en)
Other versions
EP1745872A3 (fr
Inventor
Bernd Federhen
Heinz Schmidt
Markus Jendrock
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.)
Klein Anlagenbau AG
Original Assignee
Klein Anlagenbau 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 Klein Anlagenbau AG filed Critical Klein Anlagenbau AG
Publication of EP1745872A2 publication Critical patent/EP1745872A2/fr
Publication of EP1745872A3 publication Critical patent/EP1745872A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
    • 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
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • 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
    • B22C5/085—Cooling or drying the sand together with the castings
    • 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
    • B22C5/18—Plants for preparing mould materials
    • B22C5/185—Plants for preparing mould materials comprising a wet reclamation step

Definitions

  • the invention relates to a method for treating foundry mold materials containing core sand and binder.
  • binder encompasses a product which is capable of combining both similar and different substances.
  • the setting process is carried out by physical drying, by solidification or by a strong increase in viscosity - such as a melting process - or by chemical reactions.
  • bitumen and tar are binders in road construction for aggregates, and in the field of refractories, aluminum phosphates may be used as binders.
  • additives such as sand and gravel are set and cemented by hardening the water-borne binders.
  • binders have changed lately. For example, attempts are being made to replace hitherto customary organic binders in the casting area for cores - and in part also for molds - with inorganic binders which are non-toxic and are hardened without dehumidification by dehumidification. These are, for example, water glass, magnesium sulfate, sodium phosphate and similar substances.
  • the solidification of a closed sand in a core box of the casting industry sand binder mixture is done by dehumidification; For example, hot core boxes, microwaves or hot air conducted through the sand binder mixture into the core box are used.
  • the hard core can be removed from the castings, for example, by shaking, in a water bath or by high pressure water jets.
  • the core sand bonded with inorganic / inorganic binder (s) is separated after the casting process dry from castings formed thereby; lumpy pieces are crushed dry, the core sand is then sieved to a predetermined grain size and unwanted fines fraction removed, after which the cured by moisture removal core sand is divided into two streams.
  • one partial stream is fed to an intermediate storage facility and the other partial flow is regenerated.
  • the partial stream to be regenerated is fed to a reactor with liquid and the introduced sand is treated until the grain surface is sufficiently cleaned of binder residues and products of the casting process;
  • it is intended to add to the liquid, in particular, water additives, for example sodium hydroxide solution in waterglass binders.
  • the separation of the free liquid should preferably be carried out on vibrating screens, sieve drums or centrifuges.
  • the intermediate partial flow are combined on the one hand and the other partial flow after its regeneration.
  • a degree of drying in which the mixture of the dry intermediate stored partial stream and the wet regenerated Partial flow is free-flowing, proved to be particularly favorable.
  • the remaining moisture content of the mixed two partial streams should preferably not exceed 0.1%.
  • molecular sieve beads of - in particular hydrophilic - zeolites can be admixed or else grains of silica gel.
  • the surface-wet grains of sand of the partial stream to be regenerated are treated in a dry reactor.
  • the sand should be mixed with grains of a substance that absorbs the moisture of the sand grain surface, in particular with grains of a large inner surface of porous materials.
  • the grains of sand and the moisture-absorbing grains are separated after a reaction time, in which latter the mixture rests or in which it is agitated.
  • the reaction time to absorb the moisture from the sand surface is between 10 seconds and a few minutes.
  • the moisture absorbed is removed from those drying grains outside the sand cycle.
  • the wet sand grains are brought into contact with fibrous substances whose fibers absorb the moisture of the sand grains; after separation of the sand from the fibrous substances or the like by pressing, air purging. be dried so that they can be used again to absorb moisture from sand grains.
  • the fibrous materials for example felts, scrims and fabrics made of organic and mineral fibers, in particular aramid fibers - can be used in the form of conveyor belts, drum linings or parts to be mixed with the sand and separated again from it. Moreover, the treatment of the grains of sand batchwise or - preferably - continuously.
  • bodies and webs of open-cell foams e.g. made of polyurethane foam.
  • this method involves regenerating core binder bonded with inorganic binders which has been cured by moisture removal and works without heating the sand grains during regeneration.
  • simple devices can be used with low energy consumption and low wear.
  • the amount of withdrawn for the regeneration sub-stream S 2 should be chosen so that after merging the two streams S 1 , S 2 in the long-term cycle sufficiently good sand properties. Any resulting sand losses can be compensated with new sand and the regeneration effect can be supported.
  • the cleaning of the introduced sand takes place in a liquid; as such, water is suitable.
  • additives can be added to the water in a suitable amount, for example sodium hydroxide solution with waterglass binder.
  • This cleaning process can be mechanically supported, for example, by stirrers, oscillations and ultrasonic radiators.
  • the treatment may be batchwise or continuous.
  • the degree of drying is selected so that the mixture of the completely dry sand stream S 1 of the intermediate storage and the wet-regenerated sand stream S 2 is free-flowing;
  • the composite of two streams S 1 , S 2 sand stream can be handled with the usual facilities of a foundry.
  • step F 4 of sand drying ie the treatment of the sand grains with moist surfaces in a drying reactor, in which the sand grains do not or only very slightly heat; on the one hand there is a flow with dried cooler air in the fluidized bed or in the flow stream (step F 4.1 ), on the other hand, a flow of slightly heated air with low relative humidity in the air flow or fluidized bed (step F 4.2 ).
  • the sand is mixed with grains of a substance that absorbs the moisture from the sand grain surface (step F 4.3 ).
  • the sand is mixed with grains of a substance, which absorbs the moisture from the sand grain surface.
  • the grains consist of porous materials with a large internal surface area.
  • the grains of sand and the moisture-absorbing grains are separated, for example by sieving, if their dimension is greater than that of the grains of sand. So the drying takes place without heating the sand.
  • the dried sand is added to the untreated sand stream S 1 . The residual moisture is distributed over the total sand amount.
  • the drying grains outside the sand cycle are deprived of the absorbed moisture.
  • Another way, shown by way of example, to reduce the surface moisture of the sand grains sufficiently, is to bring the wet sand grains with fibrous substances in contact.
  • the fibers absorb the moisture of the grains of sand and, when the sand has been separated from the fibrous materials, are dried, for example, by squeezing, air purging or similar steps, so that they can regain moisture from grains of sand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP06012822A 2005-06-24 2006-06-22 Procédé de traitement de mateiaux de moulage de fondérie Withdrawn EP1745872A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510029742 DE102005029742B3 (de) 2005-06-24 2005-06-24 Verfahren zum Behandeln von Gießereiformstoffen

Publications (2)

Publication Number Publication Date
EP1745872A2 true EP1745872A2 (fr) 2007-01-24
EP1745872A3 EP1745872A3 (fr) 2009-03-11

Family

ID=36776456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06012822A Withdrawn EP1745872A3 (fr) 2005-06-24 2006-06-22 Procédé de traitement de mateiaux de moulage de fondérie

Country Status (2)

Country Link
EP (1) EP1745872A3 (fr)
DE (1) DE102005029742B3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008149A1 (de) 2007-02-19 2008-08-21 Ashland-Südchemie-Kernfest GmbH Thermische Regenerierung von Gießereisand
DE102012011384A1 (de) * 2012-06-11 2013-12-12 DEANTEC GmbH Vorrichtung zum Regenerieren anorganisch gebundener Gießereisande
EP3202927B1 (fr) 2016-02-08 2018-03-28 Klein Anlagenbau AG Procede et dispositif de regeneration de sable de fonderie
TR201608569A2 (tr) * 2016-06-21 2017-01-23 Hema Enduestri Anonim Sirketi Atik döküm kumunun geri̇ kazanim yöntemi̇

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445436A2 (fr) * 1990-03-05 1991-09-11 Alb. Klein GmbH & Co. KG Dispositif pour mélanger des matériaux de moulage de fonderie
EP0465778A2 (fr) * 1990-06-28 1992-01-15 Fried. Krupp AG Hoesch-Krupp Procédé de récupération de sable décoché
DE4126976C1 (fr) * 1991-08-14 1993-01-07 Kuenkel-Wagner Gmbh & Co Kg, 3220 Alfeld, De
DE4321297A1 (de) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Verfahren zur nassen Regenerierung von mit Verunreinigungen und Schadstoffen belasteten Schüttgütern
DE19631788A1 (de) * 1996-08-07 1998-02-12 Inutec Ingenieure Fuer Ind Umw Anordnung zur thermischen Aufbereitung von Formsand aus dem Vollformgießverfahren

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681434A5 (fr) * 1990-01-31 1993-03-31 Fischer Ag Georg
WO2001064371A1 (fr) * 2000-03-02 2001-09-07 Sintokogio, Ltd. Procede de traitement de sable collecte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445436A2 (fr) * 1990-03-05 1991-09-11 Alb. Klein GmbH & Co. KG Dispositif pour mélanger des matériaux de moulage de fonderie
EP0465778A2 (fr) * 1990-06-28 1992-01-15 Fried. Krupp AG Hoesch-Krupp Procédé de récupération de sable décoché
DE4126976C1 (fr) * 1991-08-14 1993-01-07 Kuenkel-Wagner Gmbh & Co Kg, 3220 Alfeld, De
DE4321297A1 (de) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Verfahren zur nassen Regenerierung von mit Verunreinigungen und Schadstoffen belasteten Schüttgütern
DE19631788A1 (de) * 1996-08-07 1998-02-12 Inutec Ingenieure Fuer Ind Umw Anordnung zur thermischen Aufbereitung von Formsand aus dem Vollformgießverfahren

Also Published As

Publication number Publication date
EP1745872A3 (fr) 2009-03-11
DE102005029742B3 (de) 2006-08-24

Similar Documents

Publication Publication Date Title
DE2909408C2 (de) Vorrichtung zur chargenweisen Regenerierbehandlung von überwiegend tongebundenem Gießerei-Altsand für dessen Wiederverwertung anstelle von Neusand
DE3522910C2 (de) Verfahren und Vorrichtung zur Herstellung von synthetischen Gesteinsblöcken
DE3400648A1 (de) Vorrichtung und verfahren zur regeneration von giesserei-schuttsand
DE3414965A1 (de) Hochporoeser keramikkoerper fuer ad- bzw. absorptionszwecke, insbesondere fuer tierstreu, verfahren zu seiner herstellung sowie seine verwendung
DE4109167A1 (de) Verfahren zum aufbereiten von (giesserei-)altsand
EP0917499B1 (fr) Procede de production d'ebauches de noyaux et de sable a noyaux de recyclage pour la fonderie
DE102005029742B3 (de) Verfahren zum Behandeln von Gießereiformstoffen
DE602004009971T2 (de) Verfahren zur Herstellung einer Sandgiessform
EP1126017A1 (fr) Procédé de préparation de compositions détergentes et ses composants
DE2802941A1 (de) Anordnung zum herstellen von brechsanden aus mittels wasser granulierter hochofenschlacke
DE19700269C1 (de) Verfahren und Vorrichtung zum Aufbereiten und Vorbehandeln von Rohsand, insbesondere für dessen Einsatz als Zuschlagstoff für Mörtel oder Beton, für die Keramik- oder Glasindustrie oder für chemische Zwecke
EP3202927B1 (fr) Procede et dispositif de regeneration de sable de fonderie
DE3400656A1 (de) Verfahren zur regeneration von giesserei-schuttsanden
DE3022787A1 (de) Verfahren zur kontinuierlichen herstellung von schaumglas
EP0000181A1 (fr) Procédé et dispositif de solidification de substances toxiques et résiduelles, notamment de substances radioactives.
DE3936974C1 (en) Treatment of paint coagulate - comprises mixing fibres with coagulate, forming layer and heat treating
EP1759787A1 (fr) Procédé pour traiter les sables de moulage
EP0149595B1 (fr) Procédé et dispositif de régénération de sables de fonderie
DE1806842A1 (de) Verfahren und Vorrichtung,um Giesserei-Altsande zu regenerieren
DE4021329A1 (de) Verfahren und vorrichtung zum aufbereiten heisser, fluessiger schlacke
DE4323217C1 (de) Verfahren und Anlage zum Herstellen von Baumaterialien sowie Verwendung von Leiterplattenmaterial hierfür
DE4224438A1 (de) Vorrichtung zur regenerierung von giessereisand und vorzugsweise mittels dieser vorrichtung durchfuehrbares verfahren zur regenerierung von giessereisand
DE4142999A1 (de) Verfahren zur verfestigung von lockeren metallhaltigen substanzen, verfestigungsvorrichtung sowie verfestigungsprodukt
DE2451494A1 (de) Verfahren zum regenerieren von giesserei-schuttsand
DE2751500C2 (de) Verfahren und Vorrichtung zum Kühlen, Trocknen und Trennen von Gußstücken und Formsand in einer Kühltrommel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JENDROCK, MARKUS

Inventor name: SCHMIDT, HEINZ

Inventor name: FEDERHEN, BERND

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: B22C 5/18 20060101ALI20090205BHEP

Ipc: B22C 5/04 20060101ALI20090205BHEP

Ipc: B22C 5/06 20060101ALI20090205BHEP

Ipc: B22C 5/08 20060101AFI20061019BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20090415