EP0163112B1 - Verfahren und Vorrichtung zum Trennschleudern von Feinkornmineralgemischen - Google Patents

Verfahren und Vorrichtung zum Trennschleudern von Feinkornmineralgemischen Download PDF

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Publication number
EP0163112B1
EP0163112B1 EP85104851A EP85104851A EP0163112B1 EP 0163112 B1 EP0163112 B1 EP 0163112B1 EP 85104851 A EP85104851 A EP 85104851A EP 85104851 A EP85104851 A EP 85104851A EP 0163112 B1 EP0163112 B1 EP 0163112B1
Authority
EP
European Patent Office
Prior art keywords
section
separating
fine
fluid
circumferential surface
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
Application number
EP85104851A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0163112A3 (en
EP0163112A2 (de
Inventor
Walter Sedlaczek
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.)
Miset AG
Original Assignee
Miset 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 Miset AG filed Critical Miset AG
Priority to AT85104851T priority Critical patent/ATE46832T1/de
Publication of EP0163112A2 publication Critical patent/EP0163112A2/de
Publication of EP0163112A3 publication Critical patent/EP0163112A3/de
Application granted granted Critical
Publication of EP0163112B1 publication Critical patent/EP0163112B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/02—Centrifuges consisting of a plurality of separate bowls rotating round an axis situated between the bowls

Definitions

  • the invention relates to a method for obtaining a heavy and a light material fraction from a fine grain mineral mixture under the influence of centrifugal force, the fine grain mineral mixture being mixed with a fluid being fed in as a fluidized material flow in the direction of a main axis, and a device for carrying out the method.
  • a continuously operating centrifuge for separating solid-liquid mixtures is already known (DE-PS-915 799), in which several sieve drums are arranged on the arms of a rotor and can be rotated in a planetary manner about the vertical axis of rotation of the rotor. Each sieve drum can also be rotated about its own axis parallel to the rotor axis of rotation.
  • the centrifuge also has a distribution device for supplying the mixture to the screen drums, a material discharge device and a drive device for the rotor and the screen drums.
  • a similar centrifuge is also known (DE-OS-2 902 691), which is also intended for the continuous separation of solid-liquid mixtures and which has, in a vertical rotor, planetarily arranged, counter-rotating filter drums with a perforated or closed jacket, in which the material to be centrifuged does not move over the drum shell but the solids are removed by means of screws or troughs passing through the sieve drums.
  • This centrifuge is also unsuitable for separating fluidized fine-grain mineral mixtures because it only allows liquid to be separated while the solids are being discharged together.
  • a device for obtaining a light goods and a heavy goods fraction from a fine grain mineral mixture is known (DE-PS-1 133 321), in which a slurry containing the mixture is fed axially to a cylindrical vessel.
  • the vessel has at least one screw-shaped discharge groove for the heavy goods fraction in the cylindrical wall and contains a propeller with which the added slurry is set in rotation.
  • the heavy goods fraction is discharged in the upper part of the vessel, which is set in torsional and longitudinal vibrations, while the light goods fraction is sucked off by means of an immersion lifter or the like.
  • Such a device is only suitable for processing very fine-grained material, is of relatively complicated and therefore costly construction, also tends to malfunction and only achieves low throughputs per machine unit.
  • US-A-4 052 518 shows a device which serves to separate cereal grains from chaff, shell parts and other undesirable waste products.
  • the device shown does have some features which can be found in principle in the device according to the invention, but without being suitable for carrying out the method according to the invention.
  • the features known in this way are taken into account in the preamble of the independent device claim. This known device would not be suitable for carrying out the separation of actual heavy and light goods fractions.
  • a housing of the separating device is shown in e.g. B. ball bearings 1 a central shaft 1 a rotatably mounted.
  • the supply of the fluidized material flow symbolically represented in FIG. 1 by an arrow 2 takes place via a pipe 3 coaxial with the central shaft 1a, so that the material flow is fed in the direction of the main axis A of the separating device determined by the central shaft 1a.
  • the fine grain mineral mixture to be separated into weight fractions is mixed as usual in a storage container with liquid, in particular water or gas, in particular air, for which purpose the storage container contains an agitator or is equipped with a blower.
  • Devices for such treatment of material to be separated are well known, so that they do not need to be described in detail and are also not shown in the drawing.
  • the device is first described using the example of wet goods to be separated, ie goods mixed with liquid.
  • the crop stream 2 is divided into several, in the exemplary embodiment shown, into four crop streams 2a.
  • the central shaft 1a carries at the input end as a centrifugal distributor a centrifugal pump 6, the housing 7 on the central shaft 1a z. B. is flanged and has as outlets 8 four laterally outgoing feeder arms 8a in the form of flanged pipe branches.
  • a pipe section 5 is flanged to the inlet of the centrifugal pump 6, to which the pipe 3 is connected via a seal 4, such as is used to seal rotating shafts.
  • Each cutting element 14 is arranged in an evenly distributed manner around the central shaft 1a, their longitudinal axes B running parallel to the main axis A. Each cutting element 14 is about its longitudinal axis B in z. B. ball bearings 13 rotatably mounted in the support arms or support disks 12 attached to the central shaft 1a. Only one of the mutually identical cutting elements 14 is shown in FIG. 1.
  • Each cutting element 14 has an essentially tubular hollow body 15, the inner lateral surface 16 of which forms the cutting element wall.
  • a pipe bend 11 is flanged to each metering arm 8 of the pump housing 7 and is connected to one of the cutting elements 14 at its outlet end via a seal 17, which is designed in the same or similar manner as the seal 4.
  • the central shaft 1a rotates with the cutting elements 14 arranged on its support arms or support disks 12 about the main axis A and at the same time and independently of this, the cutting elements 14 rotate about their longitudinal axes B.
  • the drive device required for this can be of any design, However, it is preferably set up in such a way that the directions of rotation and the speeds can be selected for the central shaft 1a and for the cutting elements 14.
  • the rotating drive of the central shaft 1a by a drive member 29 and the rotating drive of the cutting element 14 is shown schematically by a gear pair 19.
  • the cutting elements 14, which will be described in detail below, are very sensitive to changes in throughput. Changes in the volume and / or in the fine-grain mineral mixture proportion of the partial material flow to the cutting element would inevitably and automatically also result in a change in the cutting performance of the cutting element. Uniformity of the good task is therefore an essential prerequisite for high cutting performance.
  • the continuously supplied material flow is therefore divided into several, here in four metered partial material flows with the same volume and the same proportion of fine grain mineral mixture.
  • the separating device contains the centrifugal pump 6 already mentioned above as a centrifugal distributor, which is fed with fine grain mineral mixture from the storage container and from which all cutting elements 14 are fed uniformly.
  • the dosage is on the one hand by a simple change of the impeller with the blades or blades of the centrifugal pump to the specification of the respective material flow, for. B. the turbidity adjustable and on the other hand the speed of the centrifugal pump can be optimized for the given fine grain mineral mixture.
  • the impeller 9 of the centrifugal pump 6 has as many blades or vanes 10 as there are cutting elements 14, the vanes 10 being aligned with the metering arms 8a of the pump housing 7 (FIG. 2 ).
  • the impeller 9 or, in the exemplary embodiment shown, the pump cross with the blades or blades 10 is designed as an exchangeable structural unit which can be adjusted and fastened on the end face of the central shaft 1a.
  • the partial material flow rotates in a first section of the separation area at the same angular velocity as the partition wall about its longitudinal axis B.
  • the tubular hollow body 15 of the cutting element 14 has a first, cylindrical section 15a, in which, as shown in FIG. 3, preferably Driver wings 18 are arranged.
  • This intrinsic rotation of the partial material flow centrifuges the fine grain mineral mixture in this first section against the septum section 16a.
  • the partial material flow with the cutting element 14, which rotates about its longitudinal axis B is also rotated about the main axis A lying outside the cutting element 14, preferably at a speed different from the speed of the self-rotation.
  • the partial material flow with the already pre-sorted fine-grain mineral mixture enters the second section, in which, according to the invention, its own rotation slows down and the partial material flow or the material plug is guided in a screw-like path along the partition 16b of this second section to the discharge.
  • Decreasing self-rotation is achieved in a simple manner for the partial material flow or grafting in that the driver wings 18 are omitted in the second section of the cutting element 14.
  • a plurality of screw-thread-like grooves or grooves 20 are preferably provided in the partition 16b in the second section of the partition element 14, the pitch direction of which is selected such that the outer layer of the partial material flow or plug of material against the discharge is selected for the direction of rotation of the partition element 14 about its longitudinal axis B is screwed.
  • the feed to the discharge does not come to a standstill due to the frictional resistance in the screw-thread-like grooves or grooves 20, the heavy material fraction in the grooves or grooves 20 on the partition 16b with an additional, in the direction of the discharge acting force component.
  • This additional force component for the material transport is preferably generated in a simple manner in that the second section of the separation area is continuously widened towards the discharge, i. H. the second section of the cutting element 14 has a conical shape with an increasing diameter towards the discharge.
  • the device also can be operated with a horizontally arranged central shaft 1a. Accordingly, while the separation of the fine-grain mineral mixture takes place in the first section 15a, the separated heavy goods fraction is transported to the discharge in the second section 15b, the second section 15b being designed as a preferably conical screw tube conveyor.
  • the second section 15b By forming the second section 15b in the form of a screw tube conveyor, an even better separation of the fine grain mineral mixture is achieved. Since the fluidization and pulsation of the fine-grain mineral mixture caused by the combination of the rotary movements about the main axis A and about the longitudinal axis B also continues to act in the second section 15b of the cutting element 14 and, in particular, on the partition 16b, the screw threads arise, i. H. a further concentration of the heavy goods fraction in the grooves or grooves 20, which require a much longer discharge time for the heavy goods fraction detected by them than for the inner layer comprising essentially light goods lying thereon.
  • the heavy goods fraction which has been concentrated still further thus reaches a collecting space 21 provided in the second separating element section 15b somewhat above its base 15c, which is separated from one of the separating wall 16b inwardly projecting circumferential wall 21a is formed, and is discharged therefrom through preferably adjustable first discharge openings 22, distributed along the collecting space 21, and discharged as usual.
  • the light material fraction located in the second section 15b of the cutting element 14 closer to the longitudinal axis B, and most of the fluid in the center, e.g. B. liquid, are discharged radially through the circumference of the hollow body 15 at the bottom 15c, preferably also adjustable second discharge openings 23.
  • each tubular cutting element 14 is surrounded in the region of the second section 15b by an outer jacket 25 which delimits an annular space 26 around the second section 15b.
  • the annular space 26 is over a variety of z. B. radial nozzle bores 27 (Fig. 4) with the interior of the second hollow body portion 15b in connection.
  • the annular space 26 is supplied with fluid, liquid or gas which is injected through the nozzle bores 27 into the second section 15b. If the second section 15 b is equipped with screw threads, the nozzle bores 27 are arranged at the bottom of the grooves or grooves 20.
  • the fluid injected under pressure through the nozzle bores 27 is effective only in the fluidization lifting phase, so that the heavy material fraction accumulated on the partition 16b flows essentially radially through the fluid and is cleaned of any light goods particles still present in it through the injected fluid inwards to the longitudinal axis B, d. H. washed or blown into the separated light material fraction and discharged with it.
  • the outer jacket 25 expediently has a longitudinal slot 28, in which, as shown in FIG.
  • the wall region delimiting one longitudinal side is placed obliquely outwards, so that air flows out when the cutting element rotates in the direction of the arrow the ambient atmosphere is pressed through the slot 28 into the annular space 26 and no additional supply lines to the annular space are required.
  • This above-described additional injection of gas, in particular air, into the second hollow body section 15b is particularly advantageous in the case of a dry material flow, that is to say in the case of a fine-grain mineral mixture mixed with gas, in particular air, and is therefore always provided for the separation of dry material.
  • the device is otherwise designed in the same way as above for the separation of wet fine-grain mineral mixture mixed with a liquid, in particular water, only with the difference that a centrifugal blower is used as a centrifugal distributor 6 instead of a centrifugal pump .
  • the ball bearings 1 are mounted so that they can vibrate and an additional drive device for oscillating the central shaft 1a is provided.
  • the central shaft 1a When the central shaft 1a is arranged vertically, z. B. the central shaft 1a with its ball bearings 1 arranged in the housing, bearing bolts and leaf springs comprising swing bearings 31 and rest with its lower end face on an unbalance disk or knob disk 30 which is fixedly arranged in the housing.
  • the drive devices for the central shaft 1 a and the cutting elements 14 can be adjusted with respect to the direction of rotation and rotational speed, so that the cutting elements 14 can rotate in the same or in the opposite direction as the central shaft 1. Since both the rotational speed about the main axis A, which determines the metering of the partial product flows 2a, and the rotational speed of the cutting elements 14 during operation can be adjusted, an optimal cutting process can be created for each fine grain mineral mixture.

Landscapes

  • Centrifugal Separators (AREA)
  • Cyclones (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP85104851A 1984-05-02 1985-04-22 Verfahren und Vorrichtung zum Trennschleudern von Feinkornmineralgemischen Expired EP0163112B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104851T ATE46832T1 (de) 1984-05-02 1985-04-22 Verfahren und vorrichtung zum trennschleudern von feinkornmineralgemischen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2129/84 1984-05-02
CH2129/84A CH665964A5 (de) 1984-05-02 1984-05-02 Verfahren und vorrichtung zum trennschleudern von feinkornmineralgemischen.

Publications (3)

Publication Number Publication Date
EP0163112A2 EP0163112A2 (de) 1985-12-04
EP0163112A3 EP0163112A3 (en) 1987-11-04
EP0163112B1 true EP0163112B1 (de) 1989-10-04

Family

ID=4226554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104851A Expired EP0163112B1 (de) 1984-05-02 1985-04-22 Verfahren und Vorrichtung zum Trennschleudern von Feinkornmineralgemischen

Country Status (10)

Country Link
US (1) US4673491A (ru)
EP (1) EP0163112B1 (ru)
AT (1) ATE46832T1 (ru)
AU (1) AU582576B2 (ru)
CH (1) CH665964A5 (ru)
DD (1) DD232844A5 (ru)
DE (1) DE3573375D1 (ru)
PL (1) PL143345B1 (ru)
SU (1) SU1475478A3 (ru)
ZA (1) ZA853095B (ru)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707137C2 (de) * 1986-07-31 1995-08-31 Erich Prof Dr Ing Fellensiek Vorrichtung zum Trennen von Feinkorngemengen in Flüssigkeiten
JP2001515782A (ja) 1997-09-12 2001-09-25 ザ、ボード、オブ、トラスティーズ、オブ、ザ、リーランド、スタンフォード、ジュニア、ユニバーシティ フロースルー微量遠心分離機
SE9802116D0 (sv) * 1998-06-15 1998-06-15 Alfa Laval Ab Dekantercentrifug
US7491263B2 (en) 2004-04-05 2009-02-17 Technology Innovation, Llc Storage assembly
AT503390B1 (de) * 2006-03-30 2008-06-15 Erema Vorrichtung zur trocknung nassen schüttfähigen gutes, vorzugsweise von kunststoffteilchen
GB2446129B (en) * 2007-02-02 2009-06-10 Dynamic Extractions Ltd Non-synchronous drive for centrifuges
NL1033612C1 (nl) * 2007-03-29 2008-09-30 M E Antonis Beheer B V Inrichting en werkwijze voor het in twee fasen scheiden van een substantie.
WO2015021283A1 (en) * 2013-08-07 2015-02-12 Apd Holdings, Llc Centrifuge feed accelerator with feed vanes

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US689572A (en) * 1901-07-02 1901-12-24 John Joseph Berrigan Centrifugal machine.
US935311A (en) * 1908-12-04 1909-09-28 Oscar Max Kuchs Centrifugal concentrator and glassifier.
US1861878A (en) * 1928-12-06 1932-06-07 Francisco A Quiroz Separating apparatus
US2368876A (en) * 1941-07-17 1945-02-06 Enrique Puig Y Terradas Continuous centrifugal separator
CH323083A (de) * 1952-09-30 1957-07-15 Basf Ag Kontinuierlich arbeitende Zentrifuge
DE1133321B (de) * 1958-03-05 1962-07-19 Beteiligungs & Patentverw Gmbh Verfahren zum Scheiden eines Feinkornmineralgemisches nach der Wichte und Vorrichtung zur Durchfuehrung des Verfahrens
DE1153688B (de) * 1959-09-09 1963-08-29 Thaelmann Schwermaschbau Veb Zentrifuge zum Entwaessern von koernigem Gut, wie Sand, Kohle oder Salz
US4052518A (en) * 1973-12-19 1977-10-04 Vasily Nikolaevich Borisov Method for separating seed cover from endosperm of grain of various cereal crops
PL120195B1 (en) * 1978-01-26 1982-02-27 Cukroprojekt Continuously operating centrifuge
ZA821077B (en) * 1981-02-23 1983-04-27 Lowan Ltd Apparatus for the separation of particles from a slurry
AU542302B2 (en) * 1981-04-23 1985-02-14 Anderson Group Plc Integrated cutter, breaker and haulage drive gearcase
US4481020A (en) * 1982-06-10 1984-11-06 Trw Inc. Liquid-gas separator apparatus

Also Published As

Publication number Publication date
ATE46832T1 (de) 1989-10-15
AU582576B2 (en) 1989-04-06
CH665964A5 (de) 1988-06-30
EP0163112A3 (en) 1987-11-04
EP0163112A2 (de) 1985-12-04
DD232844A5 (de) 1986-02-12
AU4166385A (en) 1985-11-07
DE3573375D1 (en) 1989-11-09
SU1475478A3 (ru) 1989-04-23
US4673491A (en) 1987-06-16
PL143345B1 (en) 1988-02-29
PL253194A1 (en) 1986-02-11
ZA853095B (en) 1985-12-24

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