EP0478881A1 - Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfähigen Materialien - Google Patents

Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfähigen Materialien Download PDF

Info

Publication number
EP0478881A1
EP0478881A1 EP91105479A EP91105479A EP0478881A1 EP 0478881 A1 EP0478881 A1 EP 0478881A1 EP 91105479 A EP91105479 A EP 91105479A EP 91105479 A EP91105479 A EP 91105479A EP 0478881 A1 EP0478881 A1 EP 0478881A1
Authority
EP
European Patent Office
Prior art keywords
container
chamber
bulk material
combustion chamber
longitudinal axis
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Withdrawn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
EP91105479A
Other languages
German (de)
English (en)
French (fr)
Inventor
Franz Gähler
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
Priority claimed from CH26591A external-priority patent/CH688435A5/de
Application filed by Individual filed Critical Individual
Publication of EP0478881A1 publication Critical patent/EP0478881A1/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Withdrawn legal-status Critical Current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
    • B22C5/185—Plants for preparing mould materials comprising a wet reclamation step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds

Definitions

  • the invention relates to a process for the preparation of bulk materials, in particular of fragment-like fractions and / or free-flowing materials, and to a plant for carrying out the method, in which the fragment-like fractions or free-flowing materials by appropriate comminution and / or wet treatment and by a subsequent thermal treatment be processed.
  • a special area of application for such a method is the reprocessing (recycling) of bulk goods.
  • These bulk materials can be obtained, for example, in the form of metal-containing fractions or fractional fractions by organic or chemical binders, or else as pourable, used foundry sand.
  • the foundry sand can be obtained in the form of cold resin monosystem or in the form of mixed sand consisting of wet material sand and core sand residues or in the form of core fragments or the like.
  • binders are essentially removed by an appropriate wet treatment and then the binders are neutralized by centrifuging, so that the sand and the so-called, essentially from binder residues and quartz dust existing fine sludge can be separated.
  • the remaining portions of the binder are burned by an additional thermal treatment in a continuous shaft furnace.
  • the present invention is concerned with the problem of economical recycling of bulk materials, such as those which arise, for example, in the form of metal-containing fractions and fractional fractions by organic or chemical binders, or of pourable, used foundry sands which arise as different types of sand, the object of the invention lies in specifying a method and an installation for carrying out the method, by means of which the bulk goods obtained as fractions or sand are processed to a recyclable and, as new, quality.
  • this object is achieved in that the bulk material for the thermal treatment is passed through a pipeline system which is heated on the outside and is then subjected to a gaseous medium for a sieving and separation process for remaining gases and fine particles.
  • the system according to the invention for carrying out the method consists of a drum furnace with a heatable combustion chamber for the thermal treatment of bulk materials, in particular of fragment-like fractions or free-flowing materials, and is characterized in that a pipeline system which is rotatably mounted about its longitudinal axis and is operatively connected to a drive also includes At least one spiral-shaped tube is provided, which is designed at one end for receiving and at the other end for dispensing the bulk material into an associated chamber.
  • the free-flowing materials are, for example, different types of sand, such as those obtained in the form of cold resin monosystem or in the form of mixed sand consisting of wet goods sand and core sand residues or in the form of core fragments or the like as so-called foundry by-products.
  • the system designated as a whole by 50, essentially comprises a so-called washing container 10, a first and second transport and conveyor belt 5, 6, 7 and 11, an ultrasound device 15 and a drum oven 20.
  • the washing container 10 contains a certain liquid, which is kept in constant motion by the ultrasound device 15 which is operatively connected to the washing container 10.
  • washing container 10 is assigned a rasp container, not shown in FIG. 1 and provided with corresponding comminution elements, by means of which the products delivered in the form of core fragments are comminuted and then the sand as the washing container 10 are supplied.
  • the ultrasound device 15 comprises two sound transducers 16 and 17 which are arranged at a distance from one another on the washing tank 10 and which are connected to a generator 18 via lines 16 'and 17'.
  • the generator 18 is connected to the supply network via a line 19.
  • the line frequency supplied via the line 19 is converted into a corresponding high frequency, which is supplied via lines 16 ', 17' to the corresponding sound converter 16, 17.
  • the electrical vibrations are converted into mechanical vibrations of approximately the same frequency.
  • the sludge 10 is fed via a return line 33 connected to the container 10 to a so-called filter press 32.
  • the resulting solids are fed to a corresponding plant (not shown) for further use in the direction of the arrow 34", while the liquid is fed via a line 34 in the direction of the arrow 34 'is supplied to the container 10.
  • an aqueous solvent liquid is used as the so-called cleaning liquid 10 '.
  • the aqueous bath for example with an alkaline pH of 7-14, has an optimal cleaning effect and is also environmentally friendly, largely degradable.
  • the cleaned sand is fed to a funnel-like container 4 and then via a feed line 1 to a pipeline system 40 which is arranged accordingly in a container 21 of the drum furnace 20.
  • the container 4 is connected via a line 4 'to the interior 21' of the container 21 which is designed as a combustion chamber, so that the sand cleaned in the washing container 10 and still moist in this phase is largely dried.
  • a slide 2 can be arranged between the funnel-like container 4 and the container 21, which slide can be actuated by a piston / cylinder unit 3 which can be appropriately controlled for opening and closing the slide 2.
  • a burner 31 is arranged on the front part A of the container 21, which is designed as an inlet, by means of which the interior 21 'of the container 21, which is designed as a combustion chamber, is heated.
  • several are distributed on the container 21 in the longitudinal and circumferential directions of the container and are spaced apart arranged heating elements provided.
  • the arrangement of the heating elements oriented in the longitudinal direction is preferably divided into two or more zones, as a result of which an optimally adjustable division of the heating of the interior 21 ′ can be achieved.
  • a first chamber 26, a filter device 22, a blower 25, a second chamber 24 and a grate 23 arranged between the first chamber 26 and the second chamber 24 are provided on the rear part B of the container 21, which is designed as an outlet.
  • the filter device 22 is connected via a line 27 with the interposition of a blower 28 to the inlet A of the container 21.
  • the second chamber 24 is connected to a collecting container 30 via a line 29.
  • the feed line 1 can be connected to the pipeline system 40 via a schematically illustrated distributor element 35 which is arranged in the combustion chamber 21 'of the container 21 and is designed, for example, like a container.
  • the pipeline system 40 comprises at least one, but preferably a number of spirally wound pipes 41, which are each connected at one end to the feed line 1 or to the distributor element 35 and at the other end to the second chamber 26.
  • the individual, spiral-like pipe 41 or the complete pipeline system 40 is operatively connected to a correspondingly assigned, schematically illustrated drive 42 and is mounted in the combustion chamber 21 ′ so as to be rotatable about an approximately horizontal longitudinal axis X in the direction of the arrow Z.
  • the pipeline system 40 is arranged in the combustion chamber 21 'of the container 21 about a longitudinal axis X' increasing relative to the longitudinal axis X or about a longitudinal axis X "which is inclined relative to the longitudinal axis X. That between the horizontal axis X and between the Rising or inclined longitudinal axis X 'or X "formed angle a or a' is approximately in the order of magnitude of 10 ° to 30 °.
  • the container 21 is mounted, for example, on two foundations 45, 45 'arranged at a distance from one another in the axial direction of the container.
  • the pipeline system 40 is arranged in the combustion chamber 21 ′ with the slope described above and designated with a 'or with the slope designated with a.
  • the container 21 with its longitudinal axis X is arranged and stored on the two foundations 45, 45' with an analog inclination or slope.
  • FIG. 2 shows a second exemplary embodiment of a plant which is shown essentially as a flow diagram and is designated in its entirety by 150, which is used, for example, for the processing of fragments of sand core or the like.
  • the system 150 essentially comprises a so-called grater pot 110, a correspondingly assigned transport and conveyor belt 111 and a drum oven 120.
  • the grater pot 110 which is shown schematically and is rotated by means not shown in detail about a substantially vertical axis Y in the direction of arrow Y ', has a receptacle 110' which is provided on the inner circumference and on the bottom with correspondingly arranged and approximately knife-shaped crushing elements 113 .
  • the crushing elements 113 By means of the crushing elements 113, the sand core fragments supplied via the conveyor and conveyor belt 111 are comminuted accordingly.
  • the resulting sand which still contains all binders or the like, falls from the sieve-like bottom 114 of the grater 110 into a funnel-like container 104 and is then fed via a feed line 101 to a container 121 of the drum furnace 120.
  • a slide 102 can be arranged between the funnel-like container 104 and the container 121, which slide can be actuated by a piston / cylinder unit 103 which can be appropriately controlled for opening and closing the slide 102.
  • the drum furnace 120 is designed analogously to the drum furnace 20 described above in connection with FIG.
  • a burner 131 by means of which the interior 121 ′ of the container 121, which is designed as a combustion chamber, is heated on the front part A ′ of the container 121, which is designed as an inlet.
  • a first chamber 126, a filter device 122, a blower 125, a second chamber 124 and a grate 123 arranged between the first chamber 126 and the second chamber 124 are provided on the rear part B ′ of the container 121, which is designed as an outlet.
  • the filter device 122 is connected via a line 127 with the interposition of a blower 128 to the input A 'of the container 121.
  • the second chamber 124 is connected to a collecting container 130 via a line 129.
  • the feed line 101 can be connected to the pipeline system 140 via a schematically illustrated distributor element 135 which is arranged in the combustion chamber 121 'of the container 121 and is designed, for example, like a container.
  • the pipeline system 140 comprises at least one, but preferably a number of spirally wound pipes 141, which are each connected at one end to the feed line 101 or to the distributor element 135 and at the other end to the second chamber 126.
  • the individual, spiral-like pipe 141 or the complete pipeline system 140 is operatively connected to a correspondingly assigned, schematically illustrated drive 142 and is mounted in the combustion chamber 121 'so that it can rotate about an approximately horizontal longitudinal axis X in the direction of the arrow Z.
  • the pipeline system 140 is arranged in the combustion chamber 121 'of the container 121 about a longitudinal axis X' increasing relative to the longitudinal axis X or about a longitudinal axis X "which is inclined relative to the longitudinal axis X. That between the horizontal axis X and between the Rising or inclined longitudinal axis X 'or X "formed angle a or a' is approximately in the order of magnitude of 10 to 30 °.
  • the container 121 is mounted, for example, on two foundations 145, 145 'spaced apart in the axial direction of the container.
  • the pipeline system 140 is arranged in the combustion chamber 121 ′ with the slope described above and designated with a ′ or with the slope designated with a.
  • the container 121 with its longitudinal axis X is arranged and stored on the two foundations 145, 145' with an analog inclination or slope.
  • the pipe cross section for the individual pipe 41 of the pipe system 40 installed in the drum furnace 20 according to FIG. 1, or the individual pipe 141 of the pipe system 140 installed in the drum furnace 120 according to FIG. 2, can be of different shapes.
  • the tube cross-section of the tube deformable into a spiral is, for example, an annular, square, rectangular, triangular, polygonal, square parallel shift or the like. However, it is essential for the cross-sectional shape that the individual spiral has the largest possible heat transfer area.
  • FIG. 3 shows, as an exemplary embodiment, a pipe 41, 141 with a square, parallel, displaced cross section for the pipe system 40 or 140, and one can see the parallel opposite surfaces 38, 38 'and 39, 39', which enclose the interior designated 37.
  • FIG. 4 shows a schematic sectional view and, as a second exemplary embodiment, a washing device designated as a whole by 210, and a correspondingly assigned transport and conveyor belt 211, a first container 90, and one with means not shown, can be seen in the direction of arrow 91 ' first sieve 91 which can be moved, a correspondingly assigned, preferably funnel-shaped second container 92 and a second sieve 93 which can be moved back and forth in the direction of arrow 93 '.
  • the parts 90, 91, 92 and 93 are assigned to a washing container 75, which essentially comprises a cylinder body 75 'arranged between two flanges 76, 76' arranged at a distance from one another.
  • a filter element 77 is arranged in the interior 78 of the steel jacket or for the purpose of illustrating the function as a cylindrical body 75 '.
  • the interior of the cylinder body 75 ' is divided by the filter element 77 into a first chamber 79 for the actual bulk material (not shown) and into a second chamber 78 for detached sludge 210 ".
  • At least one sound transducer 80 which is operatively connected to a correspondingly assigned ultrasound device 85 is arranged in the chamber 79 of the cylinder body 75 '.
  • the cylinder body 75 ' is connected in a sealed manner to the two flanges 76, 76', not shown, an opening 74 'being provided in the upper flange 76 for loading the bulk material and in the lower flange 76' for emptying a conically shaped opening 74 ' .
  • the line 97 leads to a correspondingly assigned container 95, preferably provided with a sieve 94.
  • a line 99 is connected to the container 95 and, with the interposition of a valve 96 ', a return line 233 connected to the line 99 is connected.
  • the cleaned sand is fed via line 99 in the direction of arrow 99 'to the pipe system 40 (not shown in FIG. 4), while the liquid is passed to an associated filter press 232 and from the filter press 232 via a line 234 in the direction of arrow 234 'is returned to the washing tank 75.
  • a line 98 is connected with the interposition of a valve 98 ', via which the sludge 210 "is fed to the filter press 232.
  • the resulting solids are fed to a corresponding system (not shown) for further use in the direction of the arrow 98", while the Liquid is supplied to the washing container 75 via the line 234 in the direction of the arrow 234 '.
  • the material which is flowing through the piping system 40 due to the rotational movement of the piping system 40 is passed into the chamber 26 and the air flow from the fan 25 acts on it above the grate 23, as a result of which the remaining gases and fine particles are filtered out of the sand.
  • the remaining gases and fine particles are fed by the fan 25 via the filter device 22 and via the return line 27 in the direction of the arrow 27 'for complete combustion and as an additional energy source for the combustion chamber 21'.
  • the cleaned material can be fed from the chamber 24 via a line 29 in the direction of the arrow 29 'to the container 30 as a recyclable, largely new material.
  • fragmentary fractions corresponding to the transport and conveyor belt 111 are drawn in the direction of the arrow 111 ', 112 and about their vertical axis Y in the direction of the arrow Y' rotatably mounted grater 110 and crushed therein.
  • the material collected in the container 104 is then fed to the piping system 140 arranged in the container 120.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP91105479A 1990-09-24 1991-04-06 Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfähigen Materialien Withdrawn EP0478881A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH306790 1990-09-24
CH3067/90 1990-09-24
CH26591A CH688435A5 (de) 1991-01-29 1991-01-29 Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfaehigen Materialien.
CH265/91 1991-01-29

Publications (1)

Publication Number Publication Date
EP0478881A1 true EP0478881A1 (de) 1992-04-08

Family

ID=25684073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105479A Withdrawn EP0478881A1 (de) 1990-09-24 1991-04-06 Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfähigen Materialien

Country Status (16)

Country Link
EP (1) EP0478881A1 (fi)
JP (1) JPH06339745A (fi)
KR (1) KR920006055A (fi)
CN (1) CN1060048A (fi)
AU (1) AU7430791A (fi)
BR (1) BR9101989A (fi)
CA (1) CA2040491A1 (fi)
CS (1) CS106191A3 (fi)
FI (1) FI911842A (fi)
HU (1) HUT59042A (fi)
IL (1) IL97699A0 (fi)
MX (1) MX9100992A (fi)
NO (1) NO911495L (fi)
PL (1) PL290169A1 (fi)
PT (1) PT98144A (fi)
YU (1) YU92991A (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010018751A1 (de) * 2010-04-29 2011-11-03 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
CN110282896A (zh) * 2019-07-08 2019-09-27 上海第二工业大学 一种流化床与超声波耦合连续洗涤有机砂石的装置和方法
CN115342380A (zh) * 2022-07-13 2022-11-15 清航空天(北京)科技有限公司 一种非线性爆震燃烧室

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104549685A (zh) * 2014-12-31 2015-04-29 重庆长江造型材料（集团）股份有限公司 型砂水基粘结剂超声破碎装置
CN110328327B (zh) * 2019-08-08 2020-08-28 江苏鹏飞集团股份有限公司 热载体加热法再生铸造旧砂装置
CN112077258B (zh) * 2020-09-10 2021-12-03 三门峡强芯铸造材料有限公司 一种覆膜砂精密铸造废砂再利用处理***及处理工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2252259A1 (de) * 1972-10-25 1974-05-09 Halbergerhuette Gmbh Einrichtung zum rueckgewinnen von giesserei-formgrundstoff
US4008856A (en) * 1975-09-17 1977-02-22 Sears Edward A Reclaiming system for foundry sand
US4144088A (en) * 1977-01-19 1979-03-13 Kenzler Engineering Company, Inc. Process of reclaiming used foundry sand
EP0149595A2 (de) * 1984-01-11 1985-07-24 KGT GIESSEREITECHNIK GmbH Verfahren und Vorrichtung zur Regenerierung von Giessereischuttsanden
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
EP0370144A1 (en) * 1987-09-03 1990-05-30 Kawasaki Jukogyo Kabushiki Kaisha Coal-moisture control process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2252259A1 (de) * 1972-10-25 1974-05-09 Halbergerhuette Gmbh Einrichtung zum rueckgewinnen von giesserei-formgrundstoff
US4008856A (en) * 1975-09-17 1977-02-22 Sears Edward A Reclaiming system for foundry sand
US4144088A (en) * 1977-01-19 1979-03-13 Kenzler Engineering Company, Inc. Process of reclaiming used foundry sand
EP0149595A2 (de) * 1984-01-11 1985-07-24 KGT GIESSEREITECHNIK GmbH Verfahren und Vorrichtung zur Regenerierung von Giessereischuttsanden
EP0370144A1 (en) * 1987-09-03 1990-05-30 Kawasaki Jukogyo Kabushiki Kaisha Coal-moisture control process
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010018751A1 (de) * 2010-04-29 2011-11-03 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
DE102010018751B4 (de) * 2010-04-29 2015-08-13 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
CN110282896A (zh) * 2019-07-08 2019-09-27 上海第二工业大学 一种流化床与超声波耦合连续洗涤有机砂石的装置和方法
CN110282896B (zh) * 2019-07-08 2021-10-29 上海第二工业大学 一种流化床与超声波耦合连续洗涤有机砂石的装置和方法
CN115342380A (zh) * 2022-07-13 2022-11-15 清航空天(北京)科技有限公司 一种非线性爆震燃烧室

Also Published As

Publication number Publication date
CS106191A3 (en) 1992-04-15
FI911842A (fi) 1992-03-25
YU92991A (sh) 1993-11-16
PL290169A1 (en) 1992-04-06
CA2040491A1 (en) 1992-03-25
FI911842A0 (fi) 1991-04-16
PT98144A (pt) 1993-09-30
KR920006055A (ko) 1992-04-27
MX9100992A (es) 1992-05-04
JPH06339745A (ja) 1994-12-13
NO911495L (no) 1992-03-25
AU7430791A (en) 1992-03-26
BR9101989A (pt) 1992-04-28
HU911276D0 (en) 1991-10-28
CN1060048A (zh) 1992-04-08
NO911495D0 (no) 1991-04-16
HUT59042A (en) 1992-04-28
IL97699A0 (en) 1992-06-21

Similar Documents

Publication Publication Date Title
DE1729503B1 (de) Vorrichtung zum Trocknen von feuchtem,koernigem Trocknungsgut
JPS63205200A (ja) スラッジの乾燥方法
EP0478881A1 (de) Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfähigen Materialien
EP0528070A1 (de) Verfahren und Einrichtung zum Aufbereiten von Schüttgütern
EP1516672B1 (de) Verfahren und Vorrichtung zum Abtrennen von organischem Material von anorganischem Material
DE3440754C2 (de) Verfahren und Anlage zur Kompostierung von Reststoffen einer Kläranlage und Biomüll
DE915408C (de) Verfahren zum Betrieb einer Muehle
WO2008145474A2 (de) Verfahren sowie vorrichtung für die thermische zersetzung eines ausgangsstoffes mit fremdpartikeln
EP0276750B1 (de) Verfahren und Vorrichtung zum Aufbereiten von Schüttgut, insbesondere Strahlgut
EP0927579A2 (de) Vorrichtung und Verfahren zum Entfernen von Feststoffen aus einem Feststoff-Flüssigkeitsgemisch
DE1433941A1 (de) Verfahren und Vorrichtung zur Aufbereitung von koernigen oder pulvrigen Materialien
DE4133642C1 (fi)
CH688435A5 (de) Verfahren und Anlage zur Aufbereitung von bruchstückartigen Fraktionen und/oder rieselfaehigen Materialien.
EP0705795B1 (de) Verfahren zur Aufbereitung von mit organischen und/oder schwermetallhaltigen Verbindungen kontaminierten Schlämmen
DE1932094B2 (de) Vorrichtung zum mischen pulverfoermiger und breiartiger gueter
EP0429031B1 (de) Vorrichtung zum Trennen insbesondere ölverschmutzter Abfallteile aus Stahl oder Blech und Papier
DE2810838A1 (de) Drehtrommel
AT384988B (de) Vorrichtung zur aufbereitung von gebrauchten kunststoffbehaeltern
DE4321795C2 (de) Verfahren und Vorrichtung zur Reinigung von schüttfähigen Materialien
DE4404813C1 (de) Verfahren zur Wirbelschichttrocknung von Schlamm und Wirbelschichttrockner zur Durchführung des Verfahrens
DE2745179A1 (de) Verfahren und vorrichtung zum chargenweisen mischen, trocknen und/oder granulieren von schuettguetern
DE3844214C1 (en) Process for the recovery of rare metals from catalysts
DE3221148A1 (de) Vorrichtung und verfahren zum abtrennen und trocknen fester stoffe aus fluessigkeiten
DE69200835T2 (de) Vorrichtung zum kontinuierlichen Behandeln durch die Wirkung von Flüssigkeiten von in Masse angelieferten kleinen Gegenständen.
DE19506358A1 (de) Verfahren und Vorrichtung zum Extrahieren eines Stoffes aus einem Stoffgemisch

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: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920926

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: 19931031