EP0161995B1 - Procédé de traitement des sables de fonderie pour, notamment récupérer la chromite, ainsi que l'installation et les moyens de mise en oeuvre du procédé - Google Patents

Procédé de traitement des sables de fonderie pour, notamment récupérer la chromite, ainsi que l'installation et les moyens de mise en oeuvre du procédé Download PDF

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Publication number
EP0161995B1
EP0161995B1 EP85420051A EP85420051A EP0161995B1 EP 0161995 B1 EP0161995 B1 EP 0161995B1 EP 85420051 A EP85420051 A EP 85420051A EP 85420051 A EP85420051 A EP 85420051A EP 0161995 B1 EP0161995 B1 EP 0161995B1
Authority
EP
European Patent Office
Prior art keywords
mixture
plate
chromite
silica
installation
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
EP85420051A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0161995A1 (fr
Inventor
Gabriel Battie
Yves Bonnel
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.)
Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
Original Assignee
Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
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 Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA filed Critical Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
Publication of EP0161995A1 publication Critical patent/EP0161995A1/fr
Application granted granted Critical
Publication of EP0161995B1 publication Critical patent/EP0161995B1/fr
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables
    • 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
    • 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 subject of the invention relates, in particular to the technical sectors of foundry, the manufacture of parts by casting of metal in molds, the recovery of materials or components of the molds and in particular chromite and silica, and also of the separation in general of the components of a mixture which have different densities.
  • the object of the process for treating foundry sands according to the invention is to separate and recover, after casting, the silica, the chromite and the metallic shot, so as to be able to reuse the sand and the chromite which can be thus implement in repetitive cycles subject to replacing the losses due to various causes.
  • the mixture is passed from the intermediate container to a size grading device with sieves making it possible to separate grains or particles in several batches of different particle sizes, each batch is conveyed to a special separating table, the mixture is subjected to combined and simultaneous effects according to which, on the one hand, the components are fluidized by the effect air or a gaseous fluid under pressure through a plate or support ensuring microsuperficial diffusion, while, on the other hand, vibrations of amplitude, frequency, intensity and adjustable directional effect combined with at least one mass adjustable in intensity and position relative to the plate or support, so as to subject said plate or support for a tilting effect tending to raise the lower part of the tray which is mounted on an assembly, so as to give the tray a spatial freedom in any direction to obtain at any point of the tray or support, an
  • the installation comprises, in known manner, a general storage silo into which the mixture is sent which is then conveyed to an intermediate silo by means of a pneumatic blower.
  • a regulating valve controls the flow rate of the mixture to be sorted which then passes by gravity, on a particle size sorter shaped to separate the grains or particles of the mixture in several batches of different particle sizes and densities, each of these batches being conveyed to a separating table shaped to separate the chromite from the silica of each batch by means of a tray inclined shaped to ensure micro-surface diffusion, one of the transverse ends of the plate on the lowest side being slaved to a vibrating device, while the other opposite end of said plate is slaved to a set of masses, the plate being mounted inclined by being subject to elastically deformable support elements; drainage channel containers or conveyor belts are shaped to collect in a common way, for the separating tables, on the one hand, the silica, and, on the other hand, the chromite.
  • the process for treating foundry sands can result from shot peening.
  • the mixture resulting from shot peening is recovered, this mixture being stored; the mixture is conveyed from the storage location to an intermediate container; the mixture is passed from the intermediate container through a sorting device shaped to separate the particles or metal grains which are recovered and which are evacuated; the mixture free of particles and metallic grains is passed from said sorting device to a fluidized bed sorting device making it possible to separate grains or particles into several categories of different densities; concerning these categories, taken in order of increasing densities, fines and dust are collected in a general dust collector; the pure silica is collected and evacuated to an intermediate container of a facility for treating the sand for stall, the category consisting of a mixture of silica and chromite; the pure chromite is collected.
  • the installation for implementing the method comprises a storage silo which receives the mixture resulting from shot peening and from which said mixture is conveyed in an intermediate silo, using a blower pneumatic; the flow rate of the mixture to be sorted is controlled by a central regulating valve to pass by gravity effect, from the silo to a magnetic sorter with drum which eliminates the magnetic particles contained in the mixture, said particles being removed by means of a conveyor belt; the mixture without particles or metallic grains being directed to a fluidized bed sorting device.
  • FIG. 1 shows in a purely schematic manner and in parallel, the installation corresponding to the process for treating the mixture resulting from the release and the installation corresponding to the process for treating the mixture resulting from shot peening, it being specified that if each of the installations can be assembled and used separately, provision is made for their use in a single overall installation with useful links and transfers between the two installations.
  • FIG. 2 illustrates by a schematic overview, the separating table with an inclined plate which implements the method of separation of the components of different densities of a mixture.
  • Figures 3, 4 and 5 are corresponding views, respectively in elevation, side and plan, which show an embodiment of the separating table.
  • these separating tables (4) could be produced in any way and according to any known method, for example using grids or screens having suitably calibrated openings, or else according to the characteristic arrangements which have been the subject of French Patents N ° 73.29274, 74.28510, 78.20580.
  • FIG. 1 also illustrates this installation in a schematic manner, and we see the storage silo (7) which receives the mixture resulting from shot peening and from which said mixture is conveyed to an intermediate silo (8) by any known means and using for example a pneumatic blower.
  • the flow rate of the mixture to be sorted is controlled by a regulating valve to pass by gravity effect, from the silo (8) to a magnetic drum sorter (9) of the type known per se, which eliminates the magnetic particles contained in the mixture, particles which are removed for example by means of a conveyor belt (10).
  • the mixture without particles or metallic grains is then directed to a sorter device (11) with a fluidized bed.
  • a process is used for preparing the components (chromite and silica) which have different densities.
  • the mixture is subjected to combined and simultaneous effects according to which, on the one hand, the components are fluidized by the effect of air or a gaseous fluid under pressure through an inclined plane or plate ( 16) of the separating table (4), said plate being shaped to ensure, in a known manner, a microsuperficial diffusion.
  • One of the transverse ends of the plate (16), on the lowest side, is controlled by a vibrating device (17), while the other end is controlled by a set of adjustable masses (18).
  • the masses (18) are mounted projecting from the active part of the plate, being supported by arms (18a) mounted in the extension and beyond the lateral sides of said plate.
  • the plate is likely to be subjected to vibrations of adjustable amplitude, frequency, intensity and directional effect combined with an adjustable torque effect, to ensure separate evacuation from the plate, of each component, chromite and silica, of the mixture.
  • the diffuser plate (16) is mounted by any known and appropriate means, in an inclined and adjustable manner on the support frame (19) of the table (4) while being secured, at each of its high and low transverse ends, in particular to blocks or elements (20) with elastic deformation capacity.
  • Under the plate (16) is formed a volume closed by a flexible membrane (22).
  • An air generator (23) or other means opens into the bottom of the sealed volume (22), to send air under pressure inside said volume, to fluidize the components, chromite and silica, placed on the tray.
  • FIGS. 3, 4 and 5 Illustrated in FIGS. 3, 4 and 5, an embodiment of the separating table corresponding to the operating principle shown in FIG. 2.
  • the mixture is brought with a suitable flow rate on the inclined plate (16) of the porous type.
  • chromite constitutes the dense products
  • silica constitutes the light or less dense products.
  • the vibrator devices (17) subject, in its plane, the plate (16) to adjustable frequency and amplitude vibrations. These vibrations are combined with the effects of adjustable masses (18), in intensity, and in position relative to the plate (16).
  • the masses can be adjusted in height on a vertical element (18b) of support arm (18a) and / or moved in length relative to said arms.
  • the set of masses (18) being linked to the upper part of the plate (16), communicates to the latter, in combination with the amplitudes of the vibrator (17), a tilting effect which tends to cause the elevation of the lower part of the tray.
  • the elastic supports (20) give the tray a spatial freedom in all directions, the flexible membrane (22) ensuring air tightness between the tray (16) and the separating table support housing (4).
  • the longitudinal tilting torque created by the adjustable masses is also capable of advancing heavy products in contact with the table, by ballistic phenomenon. Indeed, under a very strong acceleration following very significantly the resultant ⁇ R , the chromite grain must take off from the plate and fall back when the said plate has made its return movement and so on.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Mold Materials And Core Materials (AREA)
  • Processing Of Solid Wastes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Glanulating (AREA)
EP85420051A 1984-03-21 1985-03-19 Procédé de traitement des sables de fonderie pour, notamment récupérer la chromite, ainsi que l'installation et les moyens de mise en oeuvre du procédé Expired - Lifetime EP0161995B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404696A FR2561554B1 (fr) 1984-03-21 1984-03-21 Procede de traitement des sables de fonderie pour, notamment, recuperer la chromite, ainsi que l'installation et les moyens de mise en oeuvre du procede
FR8404696 1984-03-21

Publications (2)

Publication Number Publication Date
EP0161995A1 EP0161995A1 (fr) 1985-11-21
EP0161995B1 true EP0161995B1 (fr) 1991-06-12

Family

ID=9302473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420051A Expired - Lifetime EP0161995B1 (fr) 1984-03-21 1985-03-19 Procédé de traitement des sables de fonderie pour, notamment récupérer la chromite, ainsi que l'installation et les moyens de mise en oeuvre du procédé

Country Status (10)

Country Link
US (1) US4671867A (es)
EP (1) EP0161995B1 (es)
KR (1) KR850007011A (es)
AT (1) ATE64332T1 (es)
DE (2) DE3583184D1 (es)
ES (2) ES8801592A1 (es)
FR (1) FR2561554B1 (es)
IL (1) IL74588A (es)
RO (1) RO93730B (es)
YU (1) YU45085A (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719288A1 (de) * 1987-06-10 1988-12-22 Foerder & Anlagentechnik Gmbh Verfahren und anordnung zum trennen von schuettguetern unterschiedlichen spezifischen gewichtes
US5071541A (en) * 1988-09-30 1991-12-10 The Boeing Company Method and apparatus for sorting a mixture of particles
US4943368A (en) * 1988-11-15 1990-07-24 Pittsburgh Mineral & Environmental Technology, Inc. Nonmetallic abrasive blasting material recovery process including an electrostatic separation step
DE4109452A1 (de) * 1991-03-22 1992-09-24 Klein Alb Gmbh Co Kg Verfahren und vorrichtung zum sichten von sand o. dgl. rieselgut
CH689202A5 (de) * 1993-12-10 1998-12-15 Fischer Georg Giessereianlagen Verfahren zum Regenerieren von Giesserei-Altsand mit Anteilen von schwach magnetischen Stoffen.
US6277128B1 (en) 1998-07-11 2001-08-21 J. Scott Muldner Skin abrasion treatment device
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
KR20040009290A (ko) * 2002-07-23 2004-01-31 아이앤아이스틸 주식회사 주물사의 분리시스템
US8764350B2 (en) * 2008-06-05 2014-07-01 Alstom Technology Ltd Conveyor for transporting powder, and a method for conveying powder
WO2018038977A1 (en) * 2016-08-22 2018-03-01 Amcol International Corporation Processes for recovering sand and active clay from foundry waste
CN106424542A (zh) * 2016-08-29 2017-02-22 山西永益铸管股份有限公司 铸管废砂回收装置
DE102020004891A1 (de) * 2020-08-11 2022-02-17 Allgaier Werke Gmbh System und Verfahren zur gravimetrischen Sortierung eines Stoffgemischs

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763365A (fr) * 1933-01-21 1934-04-30 Manche Atel Chantiers Procédé et appareil pour la séparation à sec de produits de densités différentes
US2348344A (en) * 1941-11-25 1944-05-09 Birtley Co Ltd Process of separating intermixed divided materials
US2452362A (en) * 1944-12-19 1948-10-26 Link Belt Co Apparatus for treating flowable solids
US2635753A (en) * 1948-06-01 1953-04-21 Lyle G Mclean Air stratifier
US2698086A (en) * 1952-01-10 1954-12-28 Vogel Walter Arrangement for removing dust from granular material
FR1477593A (fr) * 1966-03-02 1967-04-21 Siderurgie Fse Inst Rech Procédé de classement pneumatique d'un produit pulvérulent
US3764078A (en) * 1970-12-01 1973-10-09 Applic Prod Ind Apparatus for regenerating foundry sand
DE2252259A1 (de) * 1972-10-25 1974-05-09 Halbergerhuette Gmbh Einrichtung zum rueckgewinnen von giesserei-formgrundstoff
DE2448333A1 (de) * 1974-10-10 1976-04-22 Escher Wyss Gmbh Formsandreiniger
US4144088A (en) * 1977-01-19 1979-03-13 Kenzler Engineering Company, Inc. Process of reclaiming used foundry sand
FR2425279A1 (fr) * 1978-05-11 1979-12-07 Sosson Guy Procede et dispositif pour trier et classer des particules solides de matieres diverses de densites relativement voisines
US4354641A (en) * 1979-02-26 1982-10-19 Weatherly Foundry & Manufacturing Co. Apparatus for removing no-bake coatings from foundry sand and classifying the reclaimed sand
US4449566A (en) * 1979-04-09 1984-05-22 Ford Motor Company Foundry sand reclamation
SU933178A1 (ru) * 1980-10-09 1982-06-07 Научно-Исследовательский И Проектно-Конструкторский Институт Стройматериалов Им.Дадашева Способ регенерации отработанных формовочных песчано-глинистых смесей
JPS5897462A (ja) * 1981-12-07 1983-06-09 Mazda Motor Corp 鋳型バツクアツプ用シヨツトの分離回収装置
JPH109542A (ja) * 1996-06-24 1998-01-16 Babcock Hitachi Kk ごみ焼却方法

Also Published As

Publication number Publication date
DE161995T1 (de) 1987-03-19
RO93730A (ro) 1988-06-30
IL74588A0 (en) 1985-06-30
IL74588A (en) 1987-10-20
ES541470A0 (es) 1988-02-16
ES8801592A1 (es) 1988-02-16
KR850007011A (ko) 1985-10-30
FR2561554B1 (fr) 1986-08-14
EP0161995A1 (fr) 1985-11-21
FR2561554A1 (fr) 1985-09-27
YU45085A (en) 1988-10-31
RO93730B (ro) 1988-07-02
DE3583184D1 (de) 1991-07-18
ATE64332T1 (de) 1991-06-15
ES557767A0 (es) 1988-10-01
ES8900269A1 (es) 1988-10-01
US4671867A (en) 1987-06-09

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