EP0482683B1 - Verfahren und Vorrichtung zum Trennen eines Schüttgutstromes in Fraktionen mit unterschiedlicher Korngrösse - Google Patents

Verfahren und Vorrichtung zum Trennen eines Schüttgutstromes in Fraktionen mit unterschiedlicher Korngrösse Download PDF

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Publication number
EP0482683B1
EP0482683B1 EP91202266A EP91202266A EP0482683B1 EP 0482683 B1 EP0482683 B1 EP 0482683B1 EP 91202266 A EP91202266 A EP 91202266A EP 91202266 A EP91202266 A EP 91202266A EP 0482683 B1 EP0482683 B1 EP 0482683B1
Authority
EP
European Patent Office
Prior art keywords
cushion
discharge
saddle
edge
discharge edge
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
EP91202266A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0482683A1 (de
Inventor
Gert Schuster
Romuald Hartmann
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0482683A1 publication Critical patent/EP0482683A1/de
Application granted granted Critical
Publication of EP0482683B1 publication Critical patent/EP0482683B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size

Definitions

  • the invention relates to methods and devices for separating a bulk material flow into fractions with different grain sizes.
  • Bulk material flows with a wide grain band range must in many cases be separated into fractions with coarser grain band ranges and fractions with finer grain band ranges, whereby the fractions can be treated separately or a fraction can be treated separately and then combined with the other fraction.
  • a device for separating a bulk material stream consisting of iron ore pellets, coal, ash, lime and pellet fragments which consists of an inclined chute with several shoulders and which has a gap between the last stage.
  • the individual components of the bulk material flow on the slide experience an acceleration that depends on the respective frictional resistance, so that the throwing parabola of the material resulting from the speed at the end of the slide transports the pellets over the gap while all other components fall into the gap.
  • the material components are pre-separated at the individual stages.
  • several chutes can be connected in series, each with a gap. This device allows a satisfactory separation only for materials with very different shapes, grain sizes and properties and with a small amount of feed on the chute. In addition, the chute is heavily worn.
  • screening devices are generally used for separating bulk material flows.
  • An example is the crushing of sintered material after it has been thrown off the traveling grate and after it has been crushed in the spiked crusher, whereby to relieve the roller crusher - in the oversize grain is crushed to the desired size for use in the blast furnace - the undersize grain is screened beforehand and then the two fractions are reunited will.
  • the sieves or grates of the sieving stations have to be driven, have large sieve areas corresponding to the large amounts of material and are subject to heavy wear. This means that complex maintenance work is required and the service life of the system is limited.
  • the invention has for its object to provide a method and an apparatus which enables a separation of any bulk material flow in fractions of different grain size with the least possible equipment, wear and maintenance.
  • a material cushion is propped up from the discharge edge at the angle of repose of the material, the surface of which forms a material broadening surface, the throwing parabola of the freely falling bulk material flow onto the material broadening Surface meets, in the freely falling, widened material flow, a saddle-shaped divider - consisting of a base with a convex-circular-shaped front discharge edge and a concave-circular-shaped rear discharge edge and a material cushion bulging away from the discharge edges under the angle of repose of the material with a parallel to the discharge edges
  • Comb - is arranged so that a coarser fraction on the front of the material cushion slides down to the convex discharge edge, is widened and thrown off, and that a finer fraction on the back of the material cushion slides down and is thrown off to the concave discharge edge.
  • the base of the material broadener consists of a sheet that can be arranged horizontally, partly horizontally and partly at an angle to the horizontal or entirely at an angle to the horizontal. If the angle to the horizontal is greater than the slope angle of the material, then a thin, upwardly protruding sheet metal strip must be arranged on the discharge edge, from the upper edge of which the material cushion is exposed.
  • This sheet metal strip is also preferably applied to a horizontal or slightly inclined base and serves to protect the edge of the base and to evenly form the material cushion.
  • the convex, circular arc-shaped discharge edge of the underlay lies at the front in the conveying direction of the material.
  • the term "circular arc" includes an arc or polygonal formation.
  • the back of the material expander can be formed by a vertical wall that is attached to the base.
  • the material broadener is arranged in the parabola of the material that is thrown off by a conveyor.
  • an arcuate segment of a pouring cone is formed on the base by embossing the material on the base at the angle of repose of the material starting from the discharge edge.
  • the ridge of the pouring cone runs parallel to the discharge edge of the base in the width of the material stream that hits it.
  • the underlay is either made so wide that the material cushion that slopes away to the sides does not fall off, or a vertical wall is arranged on the underlay on each side.
  • the surface of the cone forms the Material broadening area.
  • the stream of material falling on it is widened from the width of its impact point to the width of the discharge edge.
  • the sliding material stream becomes thinner, the coarser pieces no longer float on the finer material, so that the different grain size fractions can be released from the bulk material structure and develop their own mass and energy and acceleration.
  • a greater segregation range is achieved in the discarded material flow.
  • the stream of material thrown off by the material broadener hits a saddle-shaped divider, which is arranged in the throwing parabola.
  • this saddle-shaped divider is designed like the material widener.
  • its backing also has a concave-circular rear discharge edge on the rear side.
  • an arcuate segment of a pouring cone is formed on the base by embossing the material at the embankment angle of the material, starting from the front and from the rear discharge edge.
  • the cone crest runs parallel to the front and rear discharge edges.
  • the divider is arranged in the throwing parabola of the material flow in such a way that a coarser fraction falls on the front of the pouring cone and a finer fraction on the rear side.
  • the front side of the pouring cone acts as a material broadener and widens the coarser material flow to the width of the front discharge edge.
  • the finer material flow sliding down on the rear side is narrowed to the width of the rear discharge edge.
  • the respective radius of the discharge edge of the material widener and the front and rear discharge edge of the divider is set as follows: Starting from the desired discharge width of the coarser material flow from the front discharge edge of the divider, two straight lines are drawn to the end points of the impact area of the material flow on the material widener, and the intersection point of the straight line forms the center point for the respective circular arc of all discharge edges.
  • the bulk material flow can be dropped from a conveyor belt or an inclined chute.
  • the horizontal distance of the material broadener from the discharge point of the bulk material flow and the horizontal distance of the divider from the material broadener is determined by the desired separation state of the material in the parabola of the freely falling material stream.
  • a preferred embodiment is that the material broadening is designed as a saddle-shaped divider and the second saddle-shaped divider is arranged in the throwing parabola of the coarser fraction thrown off.
  • a preferred embodiment consists in that the separation of the respectively coarser fraction takes place on several saddle-shaped dividers arranged in a cascade.
  • the number of saddle-shaped dividers depends on the requirements for the efficiency of the classification and depends on the ratio of fine to coarse material in the bulk material flow.
  • a precisely defined fine fraction can be separated by several dividers. It is also possible to remove several fine fractions with different grain size bands separately.
  • a further solution to the problem is that as a material broadener on a circular base from the circular discharge edge at the angle of repose of the material, a conical material cushion is erased, the surface of which forms a material broadening surface, the free-falling bulk material flow falling centrally onto the material cushion, freely falling, widened stream of material, a saddle-shaped divider - consisting of an annular base and a material pad with a circular comb that bulges up from the outer and inner circular discharge edge at the angle of repose of the material - is arranged in such a way that a coarser fraction on the outside of the material cushion to the outer discharge edge slides down, is widened and thrown off, and that a finer fraction on the inside of the material cushion slides down and is thrown off.
  • the circular base of the material broadener consists of a sheet which can be arranged horizontally, partly horizontally and partly at an angle to the horizontal or entirely at an angle to the horizontal. If the angle to the horizontal is greater than the slope angle of the material, then a thin, upwardly protruding sheet metal strip must be arranged on the discharge edge, from the upper edge of which the material cushion is exposed. This sheet metal strip is also preferably applied to a horizontal or slightly inclined base and serves to protect the edge of the base and to evenly form the material cushion.
  • the free-flowing bulk material flow falls centrally on the tip of the material cone or distributed around the tip on the material cushion.
  • the circular base of the saddle-shaped divider is trained according to the material broadening document. The bulk material flow can be discharged, for example, from a bunker arranged above the material widener.
  • a preferred embodiment consists in the separation of the respectively coarser fraction from a finer fraction on several cascade-like, circular saddle-shaped dividers.
  • the following saddle-shaped divider has a correspondingly larger diameter, so that it lies in the throwing parabola of the material from the previous divider.
  • the dividers can be arranged to be vertically displaceable.
  • a device for solving the problem is characterized by a material widener (1), consisting of a base (2) with a convex-arc-shaped discharge edge (3) and a material cushion (4) flared out from the discharge edge (3) at the angle of repose of the material on the Base (3) with a surface designed as a material widening surface (5), a discharge unit (6) arranged above the material widener (1), the parabola of which the free-falling bulk material (7) is directed towards the material widening surface (5), a saddle-shaped divider (8 ), which is arranged in the material stream (9) that falls freely from the material broadener (1), consisting of a base (10) with a convex-circular front discharge edge (11) and a concave-circular rear discharge edge (12) and a bottom the angle of repose of the material from the throw-off edges (11, 12) bulging material pads (13) with e in a comb running parallel to the discharge edges (11, 12), and a derivative (15) for the coarser fraction and a derivative (16
  • a preferred embodiment consists in that a saddle-shaped divider (8a) is arranged as the material widener, and the saddle-shaped divider (8) is arranged as a second divider under the throwing parabola of the coarser fraction (9) thrown off.
  • a preferred embodiment consists in that several saddle-shaped dividers (8a, 8, 8b, 8c) are arranged in a cascade.
  • a preferred embodiment is that the documents (2, 10-10c) are arranged to be horizontally displaceable.
  • a material broadener (21) consisting of a circular base (22) with a circular discharge edge (23) and a conical material cushion (24) flared out from the discharge edge (23) at the angle of repose of the material on the Underlay (22) with a surface designed as a material widening surface (25), a feed device (26) from which the free-flowing bulk material stream (27) falls centrally onto the material cushion (25), a saddle-shaped divider (28) which in the Material broadener (21) is arranged to freely fall, broadened material stream (29), consisting of an annular support (30) and a material cushion (33) which is flared open from the outer annular discharge edge (31) and the inner annular discharge edge (32) at the angle of repose of the material ) with a circular comb (34), and a drain (35) for the coarser fraction and a derivative (36) for the finer fraction.
  • a preferred embodiment consists in the fact that several circular saddle-shaped dividers (31, 31a) are arranged in cascade with one another.
  • a preferred embodiment consists in that the discharge edges (3, 11-11c, 12-12c, 23, 31, 31a, 32, 32a) are formed by thin sheet metal strips (37) which are supported by the documents (2, 10a-10c, 22, 30, 30a) protrude.
  • a preferred embodiment consists in that contoured rods (38) are arranged on the bases (2, 10a-10c, 22, 30, 30a) of the surface of the material cushion (13-13c, 21, 33, 33a).
  • the contour rods create a uniform material cushion with a precisely defined surface and throw-off edge.
  • Fig. 1 is a longitudinal section through a separator.
  • Fig. 2 is a longitudinal section through a material broadener that can be used in place of the first saddle-shaped divider in Fig. 1.
  • FIG. 3 is a top view of FIG. 1.
  • the front edge of the respective divider is shown in solid lines, the comb of the material cushion is shown in broken lines and the rear edge is shown in broken lines.
  • Fig. 4 shows a top view of the formation of the material cushion on a divider.
  • Fig. 5 is a longitudinal section through a separator with annular dividers.
  • FIG. 6 is a top view of the separation device according to FIG. 5.
  • Fig. 7 shows the arrangement of contour bars on a divider.
  • the saddle-shaped divider (8) consists of the base (10), with the convex-circular arc-shaped front discharge edge (11) and the concave-circular-arc-shaped rear discharge edge (12) and the flared-up material cushion (13).
  • the material cushion (13) erases at the angle of repose of the material from the front discharge edge (11) and the rear discharge edge (12) and forms the comb (14) which runs parallel to the front (11) and rear (12) discharge edge .
  • the discharge edges (11 and 12) are formed by narrow metal strips (37) which are mounted vertically on the base (10).
  • the saddle-shaped dividers (8a, 8b, 8c) are designed accordingly and provided with position numbers analogously. Chutes with material cushions (18, 18a, 18b) are arranged in the housing (17) at the points where dropped material hits the wall of the housing (17). The bulk material flow is thrown off the conveyor belt (6).
  • the saddle-shaped divider (8a) is arranged in the throwing parabola of the freely falling bulk material flow (7) so that the comb (14a) divides the bulk material flow into a finer and a coarser fraction. The finer fraction slips on the back of the material cushion to the discharge edge (12a), is thrown off by it and falls onto the material cushion (18).
  • the coarser fraction slides on the front side of the material cushion (13a) to the discharge edge (11a) and is thereby widened.
  • the next saddle-shaped divider (8) is arranged in the throwing parabola of the broadened material flow (9) falling freely from the discharge edge (11a).
  • the saddle-shaped divider (8) and the following saddle-shaped dividers (8b and 8c) act analogously to the first saddle-shaped divider (8a).
  • the fine fractions thrown off by the saddle-shaped dividers (8a, 8 and 8b) are thrown off the chute (18) onto the chute (18a).
  • the finer fraction thrown off by the saddle-shaped divider (8c) also falls on the chute (18a).
  • the combined finer fractions (16) are discarded and removed from the chute (18a).
  • the coarser fraction thrown off by the saddle-shaped divider (18c) falls onto the chute (18b).
  • the coarser fraction (15) is removed from the chute (18b).
  • the center (19) for all radii of the circular discharge edges is determined by starting from the corner points of the desired discharge width of the coarser material flow from the last divider (11c) two straight lines (20, 20a) to the end points of the Area of impact of the material flow on the first divider (8a) are drawn.
  • the intersection (19) is the common center point for all arcuate discharge edges.
  • the material widener (21) consists of a circular base (22) on which a circular, thin sheet metal strip (37) is attached, the upper edge of which forms the discharge edge (23), and a conical material cushion (24) that picks up from the discharge edge (23) at the angle of repose of the material.
  • the surface of the material cushion (24) forms the material widening surface (25).
  • the saddle-shaped divider (28) which consists of an annular base (30), on which a thin circular sheet (37) is arranged inside and outside, the upper edges of which are the outer annular discharge edge (31 ) and form the inner annular discharge edge (32), and a material cushion (33) which picks up from the discharge edges (31 and 32) at the angle of repose of the material and has a circular comb (34).
  • the second annular divider (28a) is designed accordingly and provided with corresponding positions.
  • a bulk material stream falls vertically from the bunker (26) centrally and around the tip of the conical material cushion (24). The flow of bulk material slides down on the material widening surface (25) of the material cushion (24), is widened in the process and thrown off from the discharge edge (23).
  • the annular divider (28) is arranged in such a way that a finer fraction slides down on the inside and is thrown off the discharge edge (32) and a coarser fraction slides down on the outside, thereby widening and is dropped from the discharge edge (31).
  • the second annular divider (28a) is arranged accordingly.
  • the finer fractions are collected and removed at (36).
  • the coarser fraction is collected and discharged at (35).
  • the advantages of the invention are that bulk material flows can be separated into fractions of different grain sizes without moving parts, without energy expenditure and without wear, the device being easily adaptable to the required classification purity.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Chutes (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP91202266A 1990-10-23 1991-09-05 Verfahren und Vorrichtung zum Trennen eines Schüttgutstromes in Fraktionen mit unterschiedlicher Korngrösse Expired - Lifetime EP0482683B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4033619A DE4033619A1 (de) 1990-10-23 1990-10-23 Verfahren und vorrichtung zum trennen eines schuettgutstromes in fraktionen mit unterschiedlicher korngroesse
DE4033619 1990-10-23

Publications (2)

Publication Number Publication Date
EP0482683A1 EP0482683A1 (de) 1992-04-29
EP0482683B1 true EP0482683B1 (de) 1994-07-20

Family

ID=6416845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202266A Expired - Lifetime EP0482683B1 (de) 1990-10-23 1991-09-05 Verfahren und Vorrichtung zum Trennen eines Schüttgutstromes in Fraktionen mit unterschiedlicher Korngrösse

Country Status (5)

Country Link
EP (1) EP0482683B1 (enrdf_load_stackoverflow)
JP (1) JP3266631B2 (enrdf_load_stackoverflow)
AT (1) ATE108705T1 (enrdf_load_stackoverflow)
DE (2) DE4033619A1 (enrdf_load_stackoverflow)
TW (1) TW222598B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020014743A1 (en) * 2018-07-17 2020-01-23 Gulf Conveyor Systems Pty Ltd Sizing and separating granular particles

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691915B1 (fr) * 1992-06-09 1994-09-09 Becker Arnaud Dispositif de tri granulométrique par vibration.
FR2723008B1 (fr) * 1994-07-29 1996-09-20 Inst Francais Du Petrole Dispositif concentrateur en particules fines ou cassees
US6138817A (en) * 1996-09-13 2000-10-31 H. F. Marel Ltd. Gravity feed grading unit
DE102005002224A1 (de) * 2005-01-18 2006-07-27 Industriemaschinen-Bergbau-Service Gmbh Verteilvorrichtung
CN103203318A (zh) * 2013-04-12 2013-07-17 中化镇江焦化有限公司 振动筛
CN104096674A (zh) * 2014-06-30 2014-10-15 河南威猛振动设备股份有限公司 一种燕形直线振动筛
CN104764742B (zh) * 2015-03-16 2017-11-17 周口师范学院 谷物参数检测箱用的谷物籽粒自动分散装置
CN104826793B (zh) * 2015-05-12 2016-08-03 中国科学院南京土壤研究所 往复式垂向振荡电动筛分机及其使用方法
CN107234067A (zh) * 2017-06-29 2017-10-10 西安欧中材料科技有限公司 一种粉末分选装置
CN115007464A (zh) * 2022-06-29 2022-09-06 中国十七冶集团有限公司 一种混凝土质量筛选装置及混凝土质量筛选方法

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DE722498C (de) * 1940-02-24 1942-07-11 Wilhelm Mueller Verfahren und Abrollscheider zur Aufbereitung von Steinkohle u. dgl.
FR975068A (fr) * 1942-01-20 1951-03-01 Traitement Ind Des Residus Urb Appareil de triage de gadoues ou autres mélanges hétérogènes
DE1433342A1 (de) * 1964-07-16 1968-11-14 Metallgesellschaft Ag Vorrichtung zur Trennung von Austragsgemischen aus Drehrohroefen
US3591000A (en) * 1969-10-27 1971-07-06 Ira B Humphreys Method and apparatus for sizing and separating solids
US3722464A (en) * 1971-06-24 1973-03-27 Int Nickel Co Apparatus for coating and separating pellets
DE2200161A1 (de) * 1972-01-04 1973-07-19 Helmut Schmidt Geraet zum aussondern der blaetter aus geernteten oliven
DE3607787C1 (en) * 1986-03-08 1987-08-20 Erg Gmbh Apparatus for separating and reprocessing rubble

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020014743A1 (en) * 2018-07-17 2020-01-23 Gulf Conveyor Systems Pty Ltd Sizing and separating granular particles
WO2020014744A1 (en) * 2018-07-17 2020-01-23 Gulf Conveyor Systems Pty Ltd Separation of granular particles
US11660640B2 (en) 2018-07-17 2023-05-30 Gulf Conveyor System S Pty Ltd Separation of granular particles
US11666943B2 (en) * 2018-07-17 2023-06-06 Gulf Conveyor System S Pty Ltd Sizing and separating granular particles
AU2019304103C1 (en) * 2018-07-17 2024-10-24 Gulf Conveyor Systems Pty Ltd Separation of granular particles

Also Published As

Publication number Publication date
DE59102248D1 (de) 1994-08-25
EP0482683A1 (de) 1992-04-29
DE4033619C2 (enrdf_load_stackoverflow) 1993-06-09
ATE108705T1 (de) 1994-08-15
DE4033619A1 (de) 1992-04-30
JPH04265181A (ja) 1992-09-21
TW222598B (enrdf_load_stackoverflow) 1994-04-21
JP3266631B2 (ja) 2002-03-18

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