EP0504747A2 - Procédé et dispositif pour trier du sable ou matière analogue à écoulement libre - Google Patents

Procédé et dispositif pour trier du sable ou matière analogue à écoulement libre Download PDF

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Publication number
EP0504747A2
EP0504747A2 EP92104343A EP92104343A EP0504747A2 EP 0504747 A2 EP0504747 A2 EP 0504747A2 EP 92104343 A EP92104343 A EP 92104343A EP 92104343 A EP92104343 A EP 92104343A EP 0504747 A2 EP0504747 A2 EP 0504747A2
Authority
EP
European Patent Office
Prior art keywords
bed
sand
air
intermediate floor
housing
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Withdrawn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
EP92104343A
Other languages
German (de)
English (en)
Other versions
EP0504747A3 (en
Inventor
Bernd Dipl.-Ing. Federhen
Hans-Hoachim Scheel
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.)
Alb Klein GmbH and Co KG
Original Assignee
Alb Klein 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 Alb Klein GmbH and Co KG filed Critical Alb Klein GmbH and Co KG
Publication of EP0504747A2 publication Critical patent/EP0504747A2/fr
Publication of EP0504747A3 publication Critical patent/EP0504747A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02—Arrangement of air or material conditioning accessories
    • 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
    • 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
    • B22C5/10—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by dust separating

Definitions

  • the invention relates to a method and an apparatus for classifying sand or the like.
  • Rieselgut in particular for dedusting - foundry sand containing dust, using an air stream.
  • the selectivity of a sighting is particularly determined by the uniformity of the air flow. It is also important that the process conditions do not change through the use of the sifter; In known classifiers, the conditions can become considerably worse, for example, through the formation of crusts on control devices.
  • the solution to this problem is offered by the teaching of the independent claims.
  • the sand stream is led across the horizontal or slightly inclined surface of a bed of particles heavier than the particles of the sand stream, which are stored on an air flow-through floor and through which the rising air flows as a transport flow for the sand components.
  • the latter are captured and discharged by another transport stream above the sand inlet.
  • the particles should advantageously have a spherical shape and a defined diameter; then there are defined pores through which the air flow is evenly distributed over the surface.
  • the particles can be used to reduce electrostatic charges in the air and thereby further improve the visual effect according to the invention consist of electrically conductive material.
  • Fills made of copper balls, steel balls and steel balls made of stainless steel have proven to be very suitable. The latter also stick less when the moisture in the air flowing through is condensed, since its surface does not oxidize significantly.
  • the bed is provided in a grounded grid to which an intermittently switchable vibrator or knocker is connected.
  • the grid height determines a uniform height of the bed and transfers the movement from the knocker or vibrator to the bed. In this way, the crusts that may form on bentonite sands on the surface of the bed can also be easily removed.
  • ionizers can be provided below the air-permeable floor. These are preferably accommodated in a base space of the housing, which can also consist of several chambers with air throttle devices.
  • At least one air nozzle is arranged below a sand introduction element in the housing in order to loosen up the incoming sand stream.
  • discharge devices can be attached to the exit of the classifier.
  • the grain size classification can thus be set via the air speed.
  • the inflowing air is discharged in the upper area of the classifier through a channel, which can advantageously be a pipe through which an air stream is drawn; the rising, fine air carries through openings of the tube into its interior.
  • the slit-like openings are arranged regularly so that the rising air flow remains even and low-turbulence.
  • a plurality of tubes can also be provided for the regular arrangement of the slots or openings - a throttle element for adjusting the basic flow is advantageously arranged in the tube.
  • An air-permeable intermediate floor l6 is provided in a housing l0 at a distance a from the bottom l2 thereof within the housing walls l3, l4 - with transverse grids l7 and longitudinal grille l7 a running in the longitudinal axis, on which a bed l8 made of copper or steel balls rests .
  • ionizers 22 are provided in a housing base space.
  • the bed l8 is overlapped by a guide tube 26, which is arranged underneath a housing ceiling l5 and is provided with air slots 24, for air entering in the region of a throttle element 27 in the direction of arrow z.
  • a sand inlet 30 in one of the end walls l3 of the housing l0, and underneath an air nozzle 32 and a sand discharge opening at the other end of the housing 34 at a vertical distance i of max. 100 mm above the surface l9 of the bed l8.
  • This distance i determines a wall threshold 35 which acts as a weir and with it a bed 36 of sand and dust on the bed l8.
  • the mixture of sand and dust which has entered the housing 10 through the sand entry 30 is thus freed of dust on the bed l8 and the sand is discharged from the sand discharge opening 34.
  • the dust-free sand 37 falls through a shaft 44 into a discharge member 46 and leaves the housing 10 cleaned there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP19920104343 1991-03-22 1992-03-13 Method and device for sifting sand or similar free-flowing material Withdrawn EP0504747A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4109452 1991-03-22
DE19914109452 DE4109452A1 (de) 1991-03-22 1991-03-22 Verfahren und vorrichtung zum sichten von sand o. dgl. rieselgut

Publications (2)

Publication Number Publication Date
EP0504747A2 true EP0504747A2 (fr) 1992-09-23
EP0504747A3 EP0504747A3 (en) 1993-09-08

Family

ID=6427979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920104343 Withdrawn EP0504747A3 (en) 1991-03-22 1992-03-13 Method and device for sifting sand or similar free-flowing material

Country Status (6)

Country Link
EP (1) EP0504747A3 (fr)
JP (1) JPH04326968A (fr)
CN (1) CN1065416A (fr)
CS (1) CS85492A3 (fr)
DE (1) DE4109452A1 (fr)
HU (1) HUT63351A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110064592A (zh) * 2019-03-31 2019-07-30 新郑市宝德高技术有限公司 一种刚玉微粉空气涡流分级设备

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322947B4 (de) * 1992-11-27 2006-02-02 Förder- und Anlagentechnik GmbH Anordnung zur Verbesserung der Verarbeitungsgeigenschaften von Sanden
CH687743A5 (de) * 1993-12-17 1997-02-14 Fischer Georg Giessereianlagen Verfahren zur Regenerierung von Giesserei-Altsand.
KR100400938B1 (ko) * 2001-02-13 2003-10-08 주식회사 토이랩 종자 선별 장치
DE102010015364B4 (de) * 2010-04-17 2013-06-27 Hosokawa Alpine Ag Luftstrahlsieb
ES2624410T3 (es) * 2012-08-23 2017-07-14 Sintokogio, Ltd. Dispositivo de regeneración de arena de moldeo
BR112019002046B1 (pt) * 2016-08-01 2022-05-31 The University Of Newcastle Aparelho e método para a separação a seco de partículas grossas.
CN106475514B (zh) * 2016-12-30 2018-05-01 绵阳易简环保科技有限公司 铸造旧砂清洗砂水快速分离装置
CN108672108B (zh) * 2018-05-28 2020-06-09 格林美（武汉）城市矿产循环产业园开发有限公司 一种间歇式半自动浮选分选系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815858A (en) * 1956-04-16 1957-12-10 Day Company Of Canada Particle classifier for refuse screenings and the like
FR1477593A (fr) * 1966-03-02 1967-04-21 Siderurgie Fse Inst Rech Procédé de classement pneumatique d'un produit pulvérulent
FR2226207A1 (en) * 1973-04-20 1974-11-15 Anvar Diffuser for fluidising gas entering fluidisation bed - comprises filamentary gas jets at about 45 degrees to base of bed
DE2357227B1 (de) * 1973-11-16 1975-03-13 Alpine Ag, 8900 Augsburg Verfahren und Vorrichtung zur Aufbereitung von Feststoffgemischen nach der Dichte ihrer Bestandteile
US4115256A (en) * 1974-06-17 1978-09-19 Zeeuw Hotze Jan De Apparatus and method for particle separation and grading
US3888352A (en) * 1974-06-21 1975-06-10 Forsbergs Inc Gravity separator
DE2641068A1 (de) * 1976-09-11 1978-03-16 Alpine Ag Steigrohrwindsichter zur entsandung von holzspaenen
US4779163A (en) * 1982-07-23 1988-10-18 Procedyne Corp. Method and apparatus for controlling electrostatic charges in fluidized beds
FR2561554B1 (fr) * 1984-03-21 1986-08-14 Stephanois Rech Mec 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110064592A (zh) * 2019-03-31 2019-07-30 新郑市宝德高技术有限公司 一种刚玉微粉空气涡流分级设备
CN110064592B (zh) * 2019-03-31 2024-04-26 新郑市宝德高技术有限公司 一种刚玉微粉空气涡流分级设备

Also Published As

Publication number Publication date
HU9200676D0 (en) 1992-05-28
EP0504747A3 (en) 1993-09-08
HUT63351A (en) 1993-08-30
CN1065416A (zh) 1992-10-21
JPH04326968A (ja) 1992-11-16
DE4109452A1 (de) 1992-09-24
CS85492A3 (en) 1992-10-14

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