EP0483933A2 - Procédé et appareil pour épurer matériaux en vrac - Google Patents

Procédé et appareil pour épurer matériaux en vrac Download PDF

Info

Publication number
EP0483933A2
EP0483933A2 EP91250172A EP91250172A EP0483933A2 EP 0483933 A2 EP0483933 A2 EP 0483933A2 EP 91250172 A EP91250172 A EP 91250172A EP 91250172 A EP91250172 A EP 91250172A EP 0483933 A2 EP0483933 A2 EP 0483933A2
Authority
EP
European Patent Office
Prior art keywords
bulk material
cleaned
fluidized bed
cleaning
gas
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Withdrawn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
EP91250172A
Other languages
German (de)
English (en)
Other versions
EP0483933A3 (en
Inventor
Hans-Klaus Dr.-Ing. Schott
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.)
Kuettner GmbH and Co KG
Original Assignee
Kuettner GmbH and Co KG
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 Kuettner GmbH and Co KG filed Critical Kuettner GmbH and Co KG
Publication of EP0483933A2 publication Critical patent/EP0483933A2/fr
Publication of EP0483933A3 publication Critical patent/EP0483933A3/de
Withdrawn legal-status Critical Current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
    • B22C5/18—Plants for preparing mould materials

Definitions

  • the invention relates to a method for the (mechanical) cleaning of the grain surface (s) of contaminated bulk material, in particular for the (post) cleaning of, in particular, thermally (pre) regenerated sand, in particular foundry used sand.
  • the present invention further relates to a device for carrying out the aforementioned method with a container provided with a bulk material inlet and a bulk material outlet, which is provided with a gas-permeable inflow base for the formation of a fluidized bed, which is supplied with fluidizing gas from a fluidizing gas source.
  • DE-OS 4 008 849 As summarized in DE-OS 4 008 849, technologies for regenerating used foundry sands have already been proposed in DE-OS 31 03 030, 38 15 877, 30 19 069 and US Pat. No. 2,783,511. which, however, lead to satisfactory results neither from a technical nor from an economic point of view.
  • DE-OS 4 008 849 itself proposes a method and a device for the regeneration of old foundry sands, which leads to very considerable technical and thus also economic improvements compared to the previous state of the art, but it has been shown that this technology too is still room for improvement, as follows:
  • the regenerate from a thermal foundry sand processing process is basically or generally already of a relatively high quality, but still contains constituents of charred resins, additives and / or chamotte on the grain surface as well as undesirable (because disruptive) fines.
  • To optimally set the desired or required quality of the regenerate it would therefore be necessary or highly desirable to also at least partially or predominantly free the regenerate from these contaminants. The same applies evidently to other processing methods.
  • the present invention is therefore based on the object of providing a method of the type described at the outset and a device which is suitable and specific for carrying it out, by means of which the contaminated grain surfaces of bulk material can be cleaned and cleaned gently (mechanically) and in a manner which is gentle on the grain.
  • the bulk material to be cleaned or subsequently cleaned is subjected to a gas flow which is under pressure and is put into a swirling state by this gas application, so that the cleaning takes place while avoiding impact or impact stresses the grains on fixed or movable walls are made solely by rubbing or abrasive (surface) stress on the grains, while the solution of the device Part of the above object in a generic device for carrying out the aforementioned method is characterized by at least one nozzle arranged above the inflow floor, the pressure gas flow of which is directed into the interior of the fluidized bed, in which the bulk material to be cleaned or cleaned is expediently and accordingly preferably located.
  • the nozzles can be arranged in height and / or laterally offset from one another, so that there can be no collision of sand streams accelerated by opposing air jets.
  • the method according to the invention also offers the possibility of letting the cleaning process run in the heat.
  • organic components e.g. from the remains of plastic binders, can be removed thermally.
  • the method according to the invention thus offers the possibility of combining the thermal and mechanical operations of thorough sand regeneration in a single step.
  • the greater benefit lies in the lower destruction of good grain and the lower costs for transport, new sand and landfill. About 15% by weight less grain is destroyed. The average grain size in the proportion> 0.09 falls in the course of cleaning by approx. 10% with a cleaning time of 1 hour.
  • the pressurized gas flow is directed at at least one loading point onto / into the bulk material to be cleaned, with the at least one pressurized gas loading point being most preferably arranged in the edge region of the bulk quantity to be cleaned in each case, but can obviously also be located in its interior.
  • At least one second pressurized gas pressurization point is arranged at least substantially opposite one another, so that this can result in - possibly at several points or several "polluter points" - that the bulk material to be cleaned lies in the area of (at least) two gas flows which are essentially opposite to each other and is therefore cleaned particularly intensively (afterwards), the friction or abrasive effects being an (exactly) dosed impact effect between the grains (but not on walls) or internals) is superimposed by the choice of the vortex state of the layer (more or less loosened) and the gas jet pulse (pre-pressure in front of the nozzle) only according to different penetration depths into the layer.
  • the pressurized gas at at least one pressurized gas application point is directed essentially tangentially to the outer surface of the bulk material quantity to be cleaned, as a result of which - in particular if this measure is implemented at two or more points - the bulk material to be cleaned can be set into a rotational movement which positively influences the desired effect, the friction effect being able to be increased on wear walls or wear internals suitable for this purpose.
  • pressurization intensity of at least one (preferably all) pressurized gas pressurization points can be adjusted so that the pressurized gas pressurization can be optimally adapted to the respective technological task, but if pressurized gas compressed air is also used, which the in here Not only solves the task in question in the most expedient manner, but is also available or can be made available inexpensively.
  • At least one second nozzle is therefore preferably arranged on at least one first nozzle on the opposite side of the fluidized bed or of the bulk material to be cleaned, the flow intensity of at least one (preferably all) nozzle (s) preferably being adjustable, i.e. can be controllable or regulatable.
  • the device according to the invention can preferably have a plurality of nozzles which are preferably arranged in pairs essentially opposite one another, in such a way that the central axes of the nozzles form parallels, have an angle to one another or else lie on a common line.
  • FIG. 1 of the drawing shows a device 1, designated as a whole for mechanical subsequent cleaning of thermally (pre-) regenerated foundry used sand 2, with a bulk material inlet (not shown in detail) and a container 3 provided with a bulk material outlet, which is essentially rectangular or is conical to its vertical axis of symmetry 4.
  • the container 3 is provided with a gas-permeable inflow base 5 which e.g. consists of a ball bed and from below via a line 6 from a compressed air source, not shown, in the direction of arrow 7 with fluidizing vortex air.
  • a gas-permeable inflow base 5 which e.g. consists of a ball bed and from below via a line 6 from a compressed air source, not shown, in the direction of arrow 7 with fluidizing vortex air.
  • nozzles 9 are arranged in the region of the fluidized bed, which are essentially opposite each other in pairs and are fed by a compressed gas source (not shown) in the direction of arrow 10 via a common throttle element 11, which is arranged in a compressed air supply line 12 and feeds a ring line 13 which is connected to the nozzles 9.
  • the compressed air supply line 12 and thus the ring line 13 can be connected to a single throttle element 11, so that the exposure intensity of the foundry sand 2 to be cleaned can be adjusted uniformly at all nozzles 9; however, several of the compressed air supply line 12 'can also be shown in FIG. 2 (In the example according to FIG.
  • the container 3 does not necessarily have to have a rectangular / conical cross section, but that it can also be circular, for example.
  • a circular cross section of the container 3 (at least in the area of the fluidized bed 8) is particularly expedient if at least some of the nozzles 9 are arranged in such a way that the bulk material 2 to be regenerated (or the fluidized bed 8) rotates during operation For example, and in particular about the rotational symmetry axis 4 of the container 3, as this can often be particularly useful.
  • dividing walls extending into the container 3, starting in the calming space 3 ' can be arranged up to just above the inflow floor 5 of the fluidized bed 8, which divides the free container interior into at least two (or possibly also more) Subdivide sectors.
  • the purpose of this is to avoid the back-mixing of already largely cleaned bulk goods with newly added material. This means that several fluidized beds are connected in series.
  • the subdivision can be made by concentric regions or by fluidized beds arranged one above the other.
  • outflow diameter of the nozzles 9 in the aforementioned embodiment is 3.4 mm, but could also be both smaller and larger.
  • the container 3 can be provided with a circumferential rubber lining 14 in the region of the fluidized bed 9, and that one or more heat exchangers (not shown) can be arranged in the upper region of the fluidized bed 8 above the nozzles of the container 3 which is reusable or reusable heat from the post-cleaning process, especially if the post-cleaning fluidized bed is connected downstream of a thermal fluidized bed.
  • FIG. 2 this can also represent a side view (and not a top view) of a preferred embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP9191250172A 1990-11-02 1991-06-29 Process and apparatus for refining bulk material Withdrawn EP0483933A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4035263 1990-11-02
DE19904035263 DE4035263C2 (de) 1990-11-02 1990-11-02 Verfahren und Vorrichtung zum Reinigen von Schüttgut

Publications (2)

Publication Number Publication Date
EP0483933A2 true EP0483933A2 (fr) 1992-05-06
EP0483933A3 EP0483933A3 (en) 1994-08-17

Family

ID=6417741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP9191250172A Withdrawn EP0483933A3 (en) 1990-11-02 1991-06-29 Process and apparatus for refining bulk material

Country Status (7)

Country Link
EP (1) EP0483933A3 (fr)
JP (1) JPH04258367A (fr)
BR (1) BR9103860A (fr)
CA (1) CA2053184A1 (fr)
DE (1) DE4035263C2 (fr)
MX (1) MX9101506A (fr)
RU (1) RU2044576C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2429085C1 (ru) * 2010-03-01 2011-09-20 Илшат Минуллович Валиуллин Способ очистки поверхности от углеводородных соединений
CN108575849A (zh) * 2018-05-07 2018-09-28 周长宾 一种变幅分段作业的无人自动投饵船
CN110124996A (zh) * 2019-06-14 2019-08-16 潍坊天洁环保科技有限公司 节能气流选粉机
CN119857418A (zh) * 2025-03-25 2025-04-22 山西沃锦新材料股份有限公司 一种基于熔盐加工用造粒设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239611A1 (de) * 1992-11-25 1994-05-26 Werner Dipl Ing Brosowski Wirbelschicht-Sichter
DE102016225338A1 (de) * 2016-12-16 2018-06-21 Deutsches Zentrum für Luft- und Raumfahrt e.V. Wärmeübertrager zur Wärmeübertragung zwischen einem partikelförmigen Wärmeträgermedium und einem zweiten Medium

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553318A (en) * 1949-05-20 1951-05-15 Herbert S Simpson Method of reclaiming sand
US2783511A (en) * 1954-02-01 1957-03-05 Hydro Blast Corp Method for reclaiming used foundry sand
US2958650A (en) * 1955-07-28 1960-11-01 Houdry Process Corp Removing contaminants from catalyst particles
FR2213094B1 (fr) * 1972-08-29 1975-03-28 Heurtey Ind
DE2708961A1 (de) * 1977-03-02 1978-09-07 Freier Grunder Eisen Metall Verfahren und vorrichtung zur herabsetzung des harzanteils von gebrauchtem giessereisand
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
EP0149876A1 (fr) * 1984-01-20 1985-07-31 Wheelabrator-Frye Inc. Procédé et appareil pour la récupération de sable de fonderie
DE3735113A1 (de) * 1986-10-16 1988-04-21 Kloeckner Humboldt Deutz Ag Wirbelschichtofen zur regenerierung unterschiedlicher giessereialtsande
JPH07104105B2 (ja) * 1987-03-17 1995-11-13 株式会社小松製作所 長軸流動層炉の流動均一化方法
DE3815877C1 (en) * 1988-05-09 1989-08-31 Uraphos Chemie Gmbh, 6370 Oberursel, De A process for separating off inorganic binder systems in the regeneration of used foundry sands
WO1991014524A1 (fr) * 1990-03-20 1991-10-03 Küttner Gmbh & Co. Kg Procede pour la regeneration de vieux sable de fonderie
DE4022339A1 (de) * 1990-07-13 1992-01-16 Kloeckner Humboldt Deutz Ag Vorrichtung zur oberflaechenabreinigung feinkoernigen gutes mit einsatz von druckluft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2429085C1 (ru) * 2010-03-01 2011-09-20 Илшат Минуллович Валиуллин Способ очистки поверхности от углеводородных соединений
CN108575849A (zh) * 2018-05-07 2018-09-28 周长宾 一种变幅分段作业的无人自动投饵船
CN110124996A (zh) * 2019-06-14 2019-08-16 潍坊天洁环保科技有限公司 节能气流选粉机
CN119857418A (zh) * 2025-03-25 2025-04-22 山西沃锦新材料股份有限公司 一种基于熔盐加工用造粒设备

Also Published As

Publication number Publication date
EP0483933A3 (en) 1994-08-17
JPH04258367A (ja) 1992-09-14
MX9101506A (es) 1992-07-08
DE4035263C2 (de) 1994-08-11
RU2044576C1 (ru) 1995-09-27
CA2053184A1 (fr) 1992-05-03
BR9103860A (pt) 1992-08-04
DE4035263A1 (de) 1992-05-07

Similar Documents

Publication Publication Date Title
DE3103030C2 (de) Verfahren zur Gewinnung von Gießereisand aus gebrauchtem Gießereisand
EP0343272B1 (fr) Procédé et dispositif pour la régénération de sable décoché de fonderie
DE2538193A1 (de) Vorrichtung zur gasverteilung fuer wirbelschichten
DE1542314A1 (de) Verfahren zum Herstellen einer Feststoff-in-Gas-Suspension
DE60311152T2 (de) Verfahren zum selektiven entfernen eines in einer oder mehreren schichten auf einem gegenstand vorhandenen materials und vorrichtung zur durchführung dieses verfahrens
DE69938137T2 (de) Gerät zum klassieren von material
DE2202311C2 (de) Anlage zur Wiedergewinnung von Sand aus dem beim Abstrahlen von kunstharzgebundenen Formen anfallenden Gemisch
DE2435943A1 (de) Verfahren und vorrichtung zum behandeln von giessereisand
EP0483933A2 (fr) Procédé et appareil pour épurer matériaux en vrac
EP0634960B1 (fr) Procede et dispositif de regeneration de sable de fonderie
EP0276750B1 (fr) Procédé et dispositif pour la préparation de matériaux en vrac, en particulier de grenailles abrasives
DE2252259A1 (de) Einrichtung zum rueckgewinnen von giesserei-formgrundstoff
DE102017220640A1 (de) Vorrichtung zum Auspacken zumindest eines Bauteils sowie ein Verfahren, um dieses Auspacken zu realisieren
DE69421687T2 (de) Verfahren und einrichtung zur zerkleinerung von verbrauchten feuerfesten auskleidungen und dergleichen
DE3038385A1 (de) Verfahren und vorrichtung zum abtrennen von staubteilchen von mit diesen behafteten partikeln
DE3519309C1 (de) Verfahren zur kontinuierlichen Herstellung von Granulaten aus einem Feststoff in einem fluidisierten Gutbett
DE2254162A1 (de) Verfahren und einrichtung zum entstauben von abgasen
EP0505722A1 (fr) Procédé de régénération de matériaux en vrac contenant des grains enrobés, spécialement de sable decoché de fonderie
DE9307072U1 (de) Vorrichtung zum Sieben eines Schüttgutstroms
DE10162151B4 (de) Verfahren und Vorrichtung zum Entgraten von Formteilen
EP1541257A2 (fr) Dispositif pour la régénération de sable de fonderie
DE3731150C2 (de) Verfahren und Vorrichtung zum Granulieren von Schwefel
DE102021201611A1 (de) Magnetische Trennvorrichtung und magnetisches Sortierverfahren
DE1508987B1 (de) Verfahren zum Abputzen von Gussteilen und Vorrichtung zur Durchfuehrung des Verfahrens
EP0767019B1 (fr) Procédé et dispositif pour la régénération de sable de fonderie

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): BE DE ES FR GB IT LU NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE ES FR GB IT LU NL

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950218