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EP0343272A1 - Procédé et dispositif pour la régénération de sable décoché de fonderie - Google Patents

Procédé et dispositif pour la régénération de sable décoché de fonderie Download PDF

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Publication number
EP0343272A1
EP0343272A1 EP88108436A EP88108436A EP0343272A1 EP 0343272 A1 EP0343272 A1 EP 0343272A1 EP 88108436 A EP88108436 A EP 88108436A EP 88108436 A EP88108436 A EP 88108436A EP 0343272 A1 EP0343272 A1 EP 0343272A1
Authority
EP
European Patent Office
Prior art keywords
sand
batch
container
friction elements
cleaning
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
EP88108436A
Other languages
German (de)
English (en)
Other versions
EP0343272B1 (fr
Inventor
Peter Ing. Grad. Vdg Pohl
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.)
POHL GIESSEREITECHNIK
Original Assignee
POHL GIESSEREITECHNIK
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8199003&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0343272(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by POHL GIESSEREITECHNIK filed Critical POHL GIESSEREITECHNIK
Priority to AT88108436T priority Critical patent/ATE79062T1/de
Priority to ES198888108436T priority patent/ES2034025T3/es
Priority to EP88108436A priority patent/EP0343272B1/fr
Priority to DE8888108436T priority patent/DE3873522D1/de
Priority to US07/354,841 priority patent/US5045090A/en
Publication of EP0343272A1 publication Critical patent/EP0343272A1/fr
Application granted granted Critical
Publication of EP0343272B1 publication Critical patent/EP0343272B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22C5/04—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
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/044—Devices having a vertical stirrer shaft in a fixed receptacle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/10—Foundry sand treatment

Definitions

  • the invention relates to a process for the regeneration of foundry sands, in which the old sands are freed of all adhering carbon-containing materials in a first stage by a thermal treatment at 500 to 900 ° C. and then subjected to a mechanical cleaning treatment.
  • a generic method is already known from DE-0S 34 00 656.
  • This known mechanical post-cleaning is disadvantageous in that the use of a rotating drum with baffles does not result in sufficient grain-to-grain friction to remove binder residues (bentonite) adhering to the grain of sand. If the known mechanical cleaning process is carried out with the aid of grinding media, a high proportion of sand grains is destroyed. Since the known method runs continuously, the known method cannot be individually adapted to different degrees of contamination of different foundry sands. As a result, using the known method, it is not possible to regenerate old sands to new sand quality.
  • Waste Disposal Act which came into force in 1987, requires that foundry sands be reprocessed and returned to the production process, since the previous practice of depositing old sands in landfills will no longer be permitted in the future.
  • the invention has for its object to provide a generic method for the regeneration of foundry sands so that a thorough processing of the old sands for new sand quality is possible without significant sand destruction.
  • the invention has for its object to provide a device by means of which thermally pretreated old sands can be reliably and gently mechanically cleaned.
  • the object on which the invention is based is achieved by the invention specified in claim 1.
  • the object on which the invention is based is achieved by the device specified in claim 8.
  • the technical progress that can be achieved with the aid of the invention results primarily from the fact that the thermally pretreated used sand is mechanically batch-wise subjected to a rubbing treatment after appropriate pre-cooling, this mechanical rubbing treatment being geared to the needs of the respective batch according to the duration and intensity and also taking care of this is carried that the grain of sand is not destroyed.
  • the cleaning duration and the cleaning intensity can be controlled in batches differently, in each case depending on the degree of oolithization of the sand.
  • the mechanical cleaning of the old sands is carried out in batches such that wear-resistant friction elements are moved through each sand batch, a relative speed occurring between the sand grains and the friction elements, which leads to burned-on binder residues (bentonite) being rubbed off the sand grain surface.
  • the speeds of the reaming tools and thus the relative speed mentioned above are selected so that the quartz sand grains are not destroyed.
  • the sand to be cleaned is first subjected to a thermal treatment at temperatures of 500 to 900 ° C., the temperatures being chosen so that a complete disposal of the gases produced during the combustion process is ensured. After the thermal treatment, the treated sand must not contain any carbon-containing components, because the subsequent mechanical cleaning step would otherwise be impaired.
  • the sand thermally treated at approximately 500 to 900 ° C. is then preferably cooled to approximately 150 to 300 ° C. in order to protect the mechanical sand cleaning device.
  • This thermally pretreated sand is introduced into the interior of a cylindrical container 1 by a feed device 3.
  • this container has a shaft 5 driven by a drive device (electric motor) 11, to which at least one friction element 2 in the form of a cross arm is fastened.
  • a drive device electric motor
  • three layers of transverse arms are provided one above the other on the shaft 5, these layers being arranged offset with respect to one another.
  • the shaft 5 with the transverse arms 2 attached to it is set in rotation.
  • This rotational movement results in a relative movement between the grains of the sand batch and the rotating cross arms (friction elements).
  • the grains of sand are accelerated by the rotating cross arms, with between the Grains of sand and the transverse arms (friction elements) a relative speed occurs, which causes the cleaning effect of the binder (bentonite) burned onto the sand grains.
  • the time duration and the intensity of the rotation of the transverse arms 2 are determined as a function of the degree of oolithization of the batch of used sand treated in each case.
  • the processed batch is discharged through a removal opening 4 provided in the outer wall of the container 1.
  • the circumferential speed of the cross arms at the outermost circumference should not be less than 5 m / s and not more than 15 mls. Below 5 m / s there is no satisfactory cleaning effect, and above 15 m / s there is a risk of damage to the quartz grain.
  • the mechanical sand cleaning is preferably carried out in such a way that the rotating cross arms (friction elements) have a peripheral speed of not more than 15 m / s at their free ends, while the peripheral speed of the cross arms in the region of the drive shaft 5 is approximately 5 m / s.
  • the duration of the cleaning treatment varies depending on the degree of oolithization, but is a maximum of 10 minutes per batch.
  • a nozzle bottom 7 is provided in the container 1, which divides the container 1 into a sand cleaning chamber above the nozzle bottom and an air chamber below the nozzle bottom.
  • a plurality of nozzles 6 is provided in the nozzle base 7 seen. These nozzles 6 are designed so that they are not blocked by sand. In the illustrated embodiment, only two nozzles 6 are provided in the nozzle base 7.
  • a discharge device 9 for sand and clay particles (dust) accumulated during the cleaning process is provided in the upper area of the container 1.
  • a filter device is connected to the discharge device 9. If compressed air is supplied to the container 1 via the compressed air supply device 8 and enters the sand cleaning chamber of the container 1 through the nozzles 6, a fluidized bed is formed inside the sand cleaning chamber, which aerates the sand batch and discharges the dust particles through the discharge device 9.
  • the quartz grain gets a slightly roughened surface.
  • the sand can be moistened by a device 10 according to a preferred embodiment of the invention by supplying moisture.
  • This device 10 opens into the interior of the sand cleaning chamber of the housing 1.
  • This moisture By adding moisture, an approximately 10% moisture content of the sand is brought about, and the sand is treated in this state.
  • the natural heat of the sand causes the sand to dry because water is evaporated. This water can be replaced again.
  • the drying process of the sand can be accelerated by introducing warm air from the thermal regeneration stage into the container 1.
  • the pH of the brisk adjust the generated sand, acidic or alkali-containing water can be introduced into the container 1 according to a further preferred embodiment of the invention.
  • the method according to the invention is suitable both for the dry mode of operation and for the wet mode of operation in order to recycle used sand bound to water glass or water glass ester to new sand quality. It goes without saying that the old sand does not need to be pretreated at temperatures up to 800 ° C. In principle, if there are still dust particles in the regenerated sand, the regenerate e.g. can be treated by sighting in the classifier or in the fluidized bed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Cleaning In General (AREA)
  • Processing Of Solid Wastes (AREA)
EP88108436A 1988-05-26 1988-05-26 Procédé et dispositif pour la régénération de sable décoché de fonderie Expired - Lifetime EP0343272B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT88108436T ATE79062T1 (de) 1988-05-26 1988-05-26 Verfahren und vorrichtung zum regenieren von giessereialtsanden.
ES198888108436T ES2034025T3 (es) 1988-05-26 1988-05-26 Procedimiento para la recuperacion de arena usada de fundicion y su equipo correspondiente.
EP88108436A EP0343272B1 (fr) 1988-05-26 1988-05-26 Procédé et dispositif pour la régénération de sable décoché de fonderie
DE8888108436T DE3873522D1 (de) 1988-05-26 1988-05-26 Verfahren und vorrichtung zum regenieren von giessereialtsanden.
US07/354,841 US5045090A (en) 1988-05-26 1989-05-22 Process and device for reclaiming used foundry sands

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88108436A EP0343272B1 (fr) 1988-05-26 1988-05-26 Procédé et dispositif pour la régénération de sable décoché de fonderie

Publications (2)

Publication Number Publication Date
EP0343272A1 true EP0343272A1 (fr) 1989-11-29
EP0343272B1 EP0343272B1 (fr) 1992-08-05

Family

ID=8199003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108436A Expired - Lifetime EP0343272B1 (fr) 1988-05-26 1988-05-26 Procédé et dispositif pour la régénération de sable décoché de fonderie

Country Status (5)

Country Link
US (1) US5045090A (fr)
EP (1) EP0343272B1 (fr)
AT (1) ATE79062T1 (fr)
DE (1) DE3873522D1 (fr)
ES (1) ES2034025T3 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659255A1 (fr) * 1990-03-08 1991-09-13 Fischer Ag Georg Procede de traitement de regeneration de sable de fonderie usage lie principalement a l'argile.
EP0512236A1 (fr) * 1991-04-10 1992-11-11 KGT GIESSEREITECHNIK GmbH Procédé de récupération mécanique de sable de fonderie décoché
US5211215A (en) * 1990-02-14 1993-05-18 Sommer Hermann W Process for neutralizing regenerated sand
DE4212097A1 (de) * 1992-04-10 1993-10-14 Boenisch Dietmar Verfahren und Vorrichtung zum Regenerieren von Giessereisand
BE1005692A5 (fr) * 1990-03-08 1993-12-21 Fischer Ag Georg Procede de traitement de regeneration de sable de fonderie usage lie principalement a l'argile.
DE4224493A1 (de) * 1992-07-24 1994-01-27 Boenisch Dietmar Verfahren und Vorrichtung zum Regenerieren von Giessereisand
DE4237838A1 (de) * 1992-11-10 1994-05-11 Badische Maschf Gmbh Verfahren und Vorrichtung zum Regenerieren von Gießereialtsand
FR2698566A1 (fr) * 1992-11-27 1994-06-03 Foerder & Anlagentechnik Gmbh Agencement pour améliorer les propriétés de retraitement de sables.
DE4301646A1 (de) * 1993-01-22 1994-08-11 Klein Alb Gmbh Co Kg Verfahren und Vorrichtung zum mechanischen Regenerieren von Gießereisand
EP0580084A3 (fr) * 1992-07-24 1995-01-11 Boenisch Dietmar Appareil et procédé pour la régénération de sable de fonderie.
EP0628367A3 (fr) * 1993-06-01 1995-04-26 Badische Maschf Gmbh Procédé pour la régénération de sable de fonderie usé.
US5540270A (en) * 1993-06-26 1996-07-30 Noell Abfall-Und Energietechnik Gmbh Process for wet regeneration of granular bulk materials charged with impurities and pollutants
WO2007082747A1 (fr) * 2006-01-18 2007-07-26 Hos Hottinger Systems Gbr Procédé et dispositif pour recycler un mélange noyau-sable de fonderie
EP2666562A1 (fr) 2012-05-25 2013-11-27 Technofond Giessereihilfsmittel GmbH Dispositif de régénération
DE102013001801A1 (de) 2013-02-01 2014-08-07 Bernd Federhen Verfahren und Vorrichtung zur mechanischen Behandlung von Gießereisanden
WO2015074676A1 (fr) 2013-11-25 2015-05-28 Technofond Dispositif de régénération
CZ305717B6 (cs) * 2014-07-03 2016-02-17 Sand Team, Spol. S R.O. Způsob regenerování vratné slévárenské směsi a zařízení k jeho provádění

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH682641A5 (de) * 1990-11-23 1993-10-29 Fischer Ag Georg Verfahren zum Trennen der Bentonit- und Kohlenstoffträgerpartikel von dem bei der Altsandregenerierung auf mechanischem Wege gewonnenen Staub.
US5236133A (en) * 1991-12-04 1993-08-17 Lundquist Lynn C Method of container label removal
US6631808B2 (en) 2001-08-07 2003-10-14 Particle And Coating Technologies, Inc. Air classifier system for the separation of particles
US6691765B2 (en) 2001-08-07 2004-02-17 Noram Technology, Ltd. Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock
RU2204459C1 (ru) * 2001-09-12 2003-05-20 Открытое акционерное общество "Конструкторско-технологический институт автоматизации и механизации в автомобилестроении" Устройство для регенерации песков из отработанных формовочных смесей
KR100402412B1 (ko) * 2001-10-25 2003-11-01 기원금속(주) 주물사 재생장치 및 그 재생방법
KR100664290B1 (ko) * 2006-02-27 2007-01-04 엘지전자 주식회사 의류 건조기의 건조 드럼
DE102011081530A1 (de) * 2011-08-25 2013-02-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Regenerierung des Sandes von Sandformen und -kernen
DE102012105257B4 (de) 2012-06-18 2018-06-07 HARTING Electronics GmbH Isolierkörper eines Steckverbinders
EP2837424A1 (fr) * 2013-08-13 2015-02-18 TARTECH eco industries AG Briseur de scories
CN103909215B (zh) * 2014-04-23 2017-01-25 湖州双金机械配件有限公司 一种消失模铸造生产线型砂再生的方法及装置
CN103909216B (zh) * 2014-04-23 2016-04-20 湖州双金机械配件有限公司 一种消失模铸造生产线砂处理系统
CN104759584A (zh) * 2015-04-22 2015-07-08 莒州集团有限公司 水玻璃废砂再生优化处理方法及系统
JP6354728B2 (ja) 2015-10-19 2018-07-11 トヨタ自動車株式会社 中子砂の再利用方法及び再利用装置
WO2018157060A2 (fr) * 2017-02-24 2018-08-30 KB Foundry Services, LLC Procédé et système de nettoyage de sable
CN106862483B (zh) * 2017-03-22 2019-07-09 青岛三运通用机械有限公司 一种用于混制设备的多级初混盘
CN106799459B (zh) * 2017-03-22 2019-03-19 丁文铃 一种具有增强初混功能的混砂机
CN107824743B (zh) * 2017-10-11 2019-06-11 武汉纺织大学 一种水玻璃铸造旧砂原位再生方法及装置
CN110076288A (zh) * 2019-04-30 2019-08-02 安徽全柴天和机械有限公司 一种旧砂机械再生的砂粒摩擦器
CN110560630B (zh) * 2019-09-16 2021-02-05 溧阳市新明机械配件制造有限公司 一种带有清料机构的混砂机
CN111408685A (zh) * 2020-03-30 2020-07-14 滁州市兴义装备模具制造有限公司 一种砂型铸造铝合金铸坯生产用原料的搅拌混合装置
US12390815B1 (en) 2024-10-24 2025-08-19 KB Foundry Services, LLC Method and system for cleaning sand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144088A (en) * 1977-01-19 1979-03-13 Kenzler Engineering Company, Inc. Process of reclaiming used foundry sand
DE3103030C2 (de) * 1981-01-30 1984-05-03 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur Gewinnung von Gießereisand aus gebrauchtem Gießereisand
DE3400656A1 (de) * 1984-01-11 1985-07-18 Delta Engineering Beratung und Vermittlung Gesellschaft mbH, Irdning Verfahren zur regeneration von giesserei-schuttsanden
EP0265707B1 (fr) * 1986-10-27 1992-06-03 Förder- und Anlagentechnik GmbH Procédé et installation pour la régénération thermo-mécanique de matières en vrac notamment de sable décoché de fonderie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205796A (en) * 1978-03-03 1980-06-03 Rexnord Inc. Vibrating reclaimer of foundry mold material
JPH0683795B2 (ja) * 1986-03-18 1994-10-26 ホソカワミクロン株式会社 ボ−ルミル

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144088A (en) * 1977-01-19 1979-03-13 Kenzler Engineering Company, Inc. Process of reclaiming used foundry sand
DE3103030C2 (de) * 1981-01-30 1984-05-03 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur Gewinnung von Gießereisand aus gebrauchtem Gießereisand
DE3400656A1 (de) * 1984-01-11 1985-07-18 Delta Engineering Beratung und Vermittlung Gesellschaft mbH, Irdning Verfahren zur regeneration von giesserei-schuttsanden
EP0265707B1 (fr) * 1986-10-27 1992-06-03 Förder- und Anlagentechnik GmbH Procédé et installation pour la régénération thermo-mécanique de matières en vrac notamment de sable décoché de fonderie

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211215A (en) * 1990-02-14 1993-05-18 Sommer Hermann W Process for neutralizing regenerated sand
FR2659255A1 (fr) * 1990-03-08 1991-09-13 Fischer Ag Georg Procede de traitement de regeneration de sable de fonderie usage lie principalement a l'argile.
BE1005692A5 (fr) * 1990-03-08 1993-12-21 Fischer Ag Georg Procede de traitement de regeneration de sable de fonderie usage lie principalement a l'argile.
EP0512236A1 (fr) * 1991-04-10 1992-11-11 KGT GIESSEREITECHNIK GmbH Procédé de récupération mécanique de sable de fonderie décoché
DE4212097A1 (de) * 1992-04-10 1993-10-14 Boenisch Dietmar Verfahren und Vorrichtung zum Regenerieren von Giessereisand
WO1993020964A1 (fr) * 1992-04-10 1993-10-28 Dietmar Boenisch Procede et dispositif de regeneration de sable de fonderie
US5439044A (en) * 1992-04-10 1995-08-08 Boenisch; Dietmar Method of regenerating foundry sand
DE4224493A1 (de) * 1992-07-24 1994-01-27 Boenisch Dietmar Verfahren und Vorrichtung zum Regenerieren von Giessereisand
EP0580084A3 (fr) * 1992-07-24 1995-01-11 Boenisch Dietmar Appareil et procédé pour la régénération de sable de fonderie.
TR27795A (tr) * 1992-07-24 1995-08-29 Werner Freischem Dökümhane kumunun rejenerasyonuna mahsus usul ve bu usulün gerceklestirilmesine mahsus tertibat.
EP0597335A1 (fr) * 1992-11-10 1994-05-18 BMD Badische Maschinenfabrik Durlach GmbH Procédé et appareil pour la régéneration de sable de fonderie usagé
DE4237838A1 (de) * 1992-11-10 1994-05-11 Badische Maschf Gmbh Verfahren und Vorrichtung zum Regenerieren von Gießereialtsand
FR2698566A1 (fr) * 1992-11-27 1994-06-03 Foerder & Anlagentechnik Gmbh Agencement pour améliorer les propriétés de retraitement de sables.
DE4322947B4 (de) * 1992-11-27 2006-02-02 Förder- und Anlagentechnik GmbH Anordnung zur Verbesserung der Verarbeitungsgeigenschaften von Sanden
DE4301646A1 (de) * 1993-01-22 1994-08-11 Klein Alb Gmbh Co Kg Verfahren und Vorrichtung zum mechanischen Regenerieren von Gießereisand
EP0628367A3 (fr) * 1993-06-01 1995-04-26 Badische Maschf Gmbh Procédé pour la régénération de sable de fonderie usé.
US5540270A (en) * 1993-06-26 1996-07-30 Noell Abfall-Und Energietechnik Gmbh Process for wet regeneration of granular bulk materials charged with impurities and pollutants
WO2007082747A1 (fr) * 2006-01-18 2007-07-26 Hos Hottinger Systems Gbr Procédé et dispositif pour recycler un mélange noyau-sable de fonderie
EP2666562A1 (fr) 2012-05-25 2013-11-27 Technofond Giessereihilfsmittel GmbH Dispositif de régénération
WO2013174479A1 (fr) 2012-05-25 2013-11-28 Technofond Giessereihilfsmittel Gmbh Dispositif de régénération
DE102013001801A1 (de) 2013-02-01 2014-08-07 Bernd Federhen Verfahren und Vorrichtung zur mechanischen Behandlung von Gießereisanden
WO2015074676A1 (fr) 2013-11-25 2015-05-28 Technofond Dispositif de régénération
CZ305717B6 (cs) * 2014-07-03 2016-02-17 Sand Team, Spol. S R.O. Způsob regenerování vratné slévárenské směsi a zařízení k jeho provádění

Also Published As

Publication number Publication date
US5045090A (en) 1991-09-03
DE3873522D1 (de) 1992-09-10
ES2034025T3 (es) 1993-04-01
ATE79062T1 (de) 1992-08-15
EP0343272B1 (fr) 1992-08-05

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