EP1214155B1 - Procede et separateur a air servant a separer de la matiere de chargement fractionnee - Google Patents

Procede et separateur a air servant a separer de la matiere de chargement fractionnee Download PDF

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Publication number
EP1214155B1
EP1214155B1 EP00958521A EP00958521A EP1214155B1 EP 1214155 B1 EP1214155 B1 EP 1214155B1 EP 00958521 A EP00958521 A EP 00958521A EP 00958521 A EP00958521 A EP 00958521A EP 1214155 B1 EP1214155 B1 EP 1214155B1
Authority
EP
European Patent Office
Prior art keywords
sifting
air
rotor
sifter
blocking air
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
EP00958521A
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German (de)
English (en)
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EP1214155A1 (fr
Inventor
Ludger Kimmeyer
Robert Schnatz
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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Filing date
Publication date
Application filed by Polysius AG filed Critical Polysius AG
Publication of EP1214155A1 publication Critical patent/EP1214155A1/fr
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Anticipated expiration legal-status Critical
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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
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • 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
    • B07B11/04—Control arrangements

Definitions

  • the invention relates to a method (according to the preamble of claim 1) and an air classifier (according to the preamble of claim 4) Classification of shredded feed material (visible material).
  • Procedures and air classifiers are of the required type known in practice in various embodiments. These air classifiers are so-called dynamic air classifiers, in general one on its outer circumference with visible strips or the like equipped, approximately basket-shaped classifying rotor is rotatably mounted within a classifier housing and is driven. Especially in the outer circumference area, i.e. around the view rotor is essentially one annular view space formed, the radially outward mostly still surrounded by a guide vane ring is. In general, around a horizontal or vertical The rotating rotating rotor follows at least one rotor end face a tubular exhaust duct for fine air loaded with fine material. classifying air and feed are appropriately entered into the Visual space introduced.
  • cements that are ground using a grinding bed mill or a roller mill containing grinding plants or grinding processes have a higher water requirement than cements that are produced, for example, in ball mill grinding plants.
  • the consequence of this higher water demand is a higher pore volume of the cement mortar, which leads to a lower standard strength of the cement mortar prisms.
  • This undesirably high water requirement for cements, which are ground in grinding plants with material bed roller mills or roller mills, is essentially attributed to a relatively narrow particle size distribution.
  • the grain size distribution in cement and in cement-like products is usually represented as a mass sum distribution in the so-called "RRSB diagram" (according to Rosin, Rammler and others), in which the axis scales are selected so that the mass sum distributions of normal mineral comminution products appear as straight lines, whereby these Sum distributions are described by two parameters, namely by the pitch n and the position parameter d ', the pitch n indicating the angle at which a best-fit line runs (e.g.
  • d the position parameter d 'determines the grain size in ⁇ m on the straight line with a specific sieve residue (residue value) of 36.8%.
  • the fineness of cement, blast furnace powder or the like is usually given as a mass-related surface in Blaine (cm 2 / g). The higher this fineness, the greater the strength of the concrete and mortar made from it. Depending on the intended use of a cement, grain fineness and water absorption capacity of the cement and thus strength and workability must be coordinated.
  • the invention is therefore based on the object Method according to the preamble of claim 1 and an air classifier according to the preamble of the claim 4 further improve such that the grain size distribution and thus the grain range in the fine material or finished product in a reliable manner and with relative low design effort within a sufficient large scope can be set.
  • this object is achieved on the one hand (procedural) by the character of the claim 1 and the other (device-wise) by the characterizing features of claim 4 solved.
  • An essential idea of the present invention is seen in the fact that the grain size distribution in discharged fines that are withdrawn as a finished product can be, with the help of a variable size from Visible space in the exhaust duct (for the mixture of fine air and fine material) flowing and with classifier material or Classifying (bypass material) loaded bypass stream is set by the size of this bypass flow through a very targeted attitude of The amount of sealing air is controlled.
  • the sealing air into the ring sealing zone between classifier rotor and stationary Extractor channel deliberately blown into it is that preferably no bypass flow and thus no spray grain (i.e. classifier feed or classifier) into the exhaust duct for the classifying air / fine material mixture can arrive, according to the present Invention with the help of the sealing air supply ensured that very specifically an adjustable part of the with the so-called bypass material loaded bypass stream in such an amount in the mixture of fine air and fine air Discharge channel is introduced, thereby the grain size distribution width of the fine or finished product can be controlled in the required manner can.
  • This control of the grain size distribution width (Grain range) in fines can be extremely reliable and be carried out reproducibly.
  • This method according to the invention can be very particularly advantageous and very targeted with high product fineness use, but still one for the respective intended use of the fine material or finished product optimal grain size distribution or distribution width can be adjusted, i.e. it can be also an optimal compromise in terms of quality properties of the product, i.e. between standard pressure resistance and processability of the finished product, achieve cement, for example.
  • the amount of sealing air supplied can be set in a range between approximately 5 and 25%, preferably between approximately 10 and 20%, of the quantity of visible air supplied to the viewing area.
  • a smaller amount of sealing air is expediently set for a relatively low fineness of the fine material and a larger amount of sealing air for a higher fineness of the fine material (finished product).
  • the pressure level of the sealing air supplied in adaptation to the classifier load and the static pressure in the discharge duct (behind the classifying rotor) for the classifying air / fine material mixture becomes.
  • the pressure loss in the exhaust duct from the sealing air supplied or sealing air volume is overcome. It is in in this connection mentioned that the pressure loss in Duct especially from the fine material loading of the Visual air, the amount of visual air, the rotor speed and the like. is dependent, with a high load, a large one Visible air volume and a high rotor speed to a high one Lead to pressure loss and vice versa.
  • An air classifier designed according to the invention draws is characterized in that one with the sealing air supply cooperating control device for setting the Grain size distribution provided in the discharged fine material is, with a bypass guide the visible space with the Duct duct connects via the ring seal and the on the sealing air supply connected with regard to the ring seal Seal air pressure and / or amount can be regulated in this way is that bypassing one of the visual space outgoing and sprayed bypass stream in a controllable size in the exhaust duct for the mixture of fine air and fine material can be introduced.
  • Air classifier 1 is a dynamic high-performance classifier, of which, however, essentially only that to illustrate the present invention necessary sifter parts are illustrated.
  • This wind sifter 1 is used for classifying previously crushed Good, i.e. Feed or sight, in at least two grain fractions (coarse and fine) used.
  • This air classifier is in an outer classifier housing 2, a classifying rotor 3, which is arranged via a drive shaft 4 by a suitable drive 5 with preferably adjustable speed can.
  • a suitable drive 5 with preferably adjustable speed can.
  • acts according to Fig.1 it is a wind sifter 1 with vertical Axis 1a, which is aligned with the vertical axis of rotation of the rotor 3 coincides.
  • the rotor 3 is essentially central rotatably supported in the upper end of the classifier housing 2.
  • the classifying rotor 3 is surrounded by classifying air (continuous Arrows 6) and feed material or visible material (thin dashed lines Arrows 7) actable visual space 8, which is preferably - as known per se - from an external Guide vane ring 9 is limited radially outwards.
  • a coarse material collection space 10 for collection and discharge of the coarse material falling down in the viewing area (thick dashed arrows 11) arranged.
  • a circumferential ring seal 14 trained to a sealing air supply or sealing air supply device 15 is connected.
  • the fineness of the finished product can be 13 basically in a manner known per se the speed of the view rotor 3 and / or by a control the amount of visible air can be set.
  • the fineness of the finished product can be 13 basically in a manner known per se the speed of the view rotor 3 and / or by a control the amount of visible air can be set.
  • they are already procedural explained - measures envisaged to Grain size distribution in the discharged fine material (dashed arrow 13) in a targeted manner or to control.
  • this wind sifter according to the invention 1 - as indicated only schematically in Fig.1 a control device 16 is provided, which in the sense of a Setting the grain size distribution in the discharged Fine material 13 with the sealing air supply 15 in a suitable manner Way interacts.
  • the visual space 8 with the drain channel 12 through the ring seal 14 a bypass guide connected through which one of the viewing space 8 outgoing and with spray grain (coarse or Semolina fraction) loaded bypass flow according to the Dash-dot-dot arrows 17 (Fig. 1) into the culvert 12 can overflow.
  • This ring seal 14 can to be relatively simple so that in each In the event of a maximum bypass flow 17 and a sufficient amount of spray grain from Visible space 8 can get into the duct 12.
  • the sealing air supply 15 contains a sealing air blower 18, which is appropriate in its supply amount (Sealing air quantity) and / or in the pressure level (pressure of the Sealing air) regulated by the control device 16 can be.
  • the ring seal 14 connected sealing air supply 15 regarding Seal air pressure and / or seal air quantity regulated in this way be that bypassing the 8 outgoing and sprayed bypass stream 17 with controllable size in the culvert 12 for that Visual air / fine material mixture introduced and thus also in this mixture can be mixed.
  • the proportion of the desired or in the fine material 13 required spray grain and thus in turn - how explained above - the grain range of the fine material or the finished product can be controlled in a targeted manner. Since the bypass flow 17 is ring-shaped in the classifier cross section from the visual space 8 via the ring seal 14 in flows into the discharge channel 12, the mixing takes place this proportion of spray grain in the fine material 13 also particularly evenly.
  • FIG.1 also shows that the Sealing air supply 15 a the lower end of the exhaust duct 12 annular main supply line 19 as well as several sealing air sub-lines branched off from it 19a, which extends over the circumference of the main feed line 19 and at the same time the ring seal 14 uniformly distributed and connected to this ring seal 14 are, so that they are appropriately in open this ring seal 14.
  • dash-dotted Arrows 20 symbolize the sealing air.
  • the ring seal can 14 be relatively simple, as it is can be seen in Fig.1.
  • the ring seal 14 only one on the inner wall of the fixed Trigger channel 12 attached, ring-shaped, fixed sealing element 14a and one on the top Face 3a of the view rotor 3 attached, annular rotating seal member 14b have, wherein the fixed sealing member 14a approximately horizontally and radially into the interior of the duct 12 faces while the rotating seal member 14b is substantially cylindrical and axially towards the fixed sealing element 14a points and with a corresponding distance in front of it ends.
  • annular space 14c is delimited, which on the one hand is penetrated by the bypass stream 17 and into which, on the other hand, the sealing air (arrows 20) is introduced becomes.
  • These two sealing elements 14a and 14b are thus also in the sense of redirecting the feed Air flows (sealing air 20 and bypass flow 17) co-ordinated.
  • That the ring seal 14 at previously essentially same basic structure also according to the respective Requirements of the air classifier 1 can be varied can by using fixed and / or rotating Sealing elements a more or less strong Air deflection or single or multiple air deflection and possibly also training like a labyrinth seal can be built in which the different Sealing elements interlocked are shown in detail in the Fig. 2, 3, 4a and 4b. Because the representations in these figures speak for themselves, they need no further Explanation.
  • both the top face and the bottom Front of the classifying rotor each has an extraction duct for allocate a part of the classifying air / fine material mixture, but then a corresponding one in each transition area Seal air supply is to be arranged, and thereby the view rotor could also be in an upper rotor part and divided a lower rotor part or by two separate rotor parts that coaxially directly to each other connect, be formed.
  • the latter Design variant is for particularly high Throughput rates suitable.
  • FIG.1 While in Fig.1 an example is illustrated, in which the air classifier 1 directly via a roller mill or roller bowl mill or at the top of a common feed channel can be arranged for sifting air and feed material, can the wind sifter according to the invention in principle as be carried out separate unit and also separate inlets for sifting air and feed material in have the visual space.
  • FIG. 5 an RRSB diagram is illustrated in FIG. 5, that shows the grain size distributions that emerged from three typical classification attempts, which among other things in those on which the invention is based Have resulted in attempts.
  • the table below shows the essential data for the three classification tests I, II and III, which were set or recorded when classifying blast furnace slag comminuted in a roller mill or roller bowl mill (for example for use for blast furnace cement).
  • experiment I no sealing air supply was used.
  • experiment II a sealing air volume of 300 m 3 / h, ie a share of 10% of the quantity of visible air, was used, while in experiment III with a sealing air quantity of 600 m 3 / h, ie 15% of the quantity of visible air (400 m 3 / h ) was worked.
  • the amount of visible air was the same at 3,000 m 3 / h, in experiment III it was 4,000 m 3 / h.

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  • Combined Means For Separation Of Solids (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Sorting Of Articles (AREA)

Claims (8)

  1. Procédé de séparation de matière de décharge broyée dans un séparateur d'air (1) présentant au moins un rotor de séparation (3) entraíné, où
    a) l'air de séparation (6) et la matière de décharge (7) sont introduits dans un espace de séparation (8),
    b) de cet espace de séparation, les grosses particules (11) se déposent essentiellement vers le bas, et le courant d'air de séparation (6a) chargé de matière fine (13) est aspiré d'abord de la circonférence du rotor, dans l'intérieur du rotor de séparation (3), puis de manière axiale sur au moins une surface d'attaque du rotor (3a) dans un canal d'évacuation fixe (12) ;
    c) et où dans une zone de garniture annulaire (14), dans la zone de transition entre le rotor de séparation (3) et le canal d'évacuation fixe (12), de l'air de contrôle est insufflé,
       caractérisé en ce que
    d) la distribution de la taille des grains dans la matière fine prélevée (13) est ajustée à l'aide d'un courant de dérivation (17) chargé de matière de décharge du séparateur ou de gravier de séparateur et s'écoulant avec une taille variable de l'espace de séparation (8) dans le canal d'évacuation (12), en ce que la taille de ce courant de dérivation est réglée par un ajustement de l'amenée d'air de contrôle au niveau de sa quantité.
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité d'air de contrôle amené est ajustable dans une gamme allant d'environ 5 à 25%, de préférence d'environ 10 à 20%, de la quantité d'air de séparation amené dans l'espace de séparation (8), où pour une finesse relativement faible de la matière fine, on ajuste une quantité plus faible d'air de contrôle et pour une finesse plus élevée de la matière fine, une quantité d'air de contrôle plus élevée.
  3. Procédé selon la revendication 1, caractérisé en ce que l'amplitude de pression de l'air de contrôle amené est réglée sur la charge du séparateur et de la pression statique dans le canal d'évacuation (12) pour le mélange air de séparation-mélange de matière fine.
  4. Séparateur d'air pour la séparation de matière de décharge broyée, contenant
    a) au moins un rotor de séparation (3) entraíné de manière à pouvoir entrer en rotation, disposé dans un boítier de séparateur (2),
    b) un espace de séparation (8) entourant le rotor de séparation (3), alimenté en air de séparation (6) et en matière de décharge (7),
    c) au moins un espace de collecte des grosses particules (10) disposé au moins partiellement sous l'espace de séparation (8),
    d) au moins un canal d'évacuation (12) fixe, adapté sur une surface d'attaque (3a) du rotor de séparation (3), pour le courant d'air de séparation (6a) chargé de la matière fine (13),
    e) une garniture annulaire (14) formée dans la zone de transition entre le rotor de séparation (3) et le canal d'évacuation fixe (14), qui est raccordé à une amenée d'air de contrôle (15), où
    f) le nombre de tour du rotor de séparation (3) et/ou la quantité d'air de séparation peuvent être ajustés,
       caractérisé en ce que
    g) un dispositif de réglage agissant avec l'amenée d'air de contrôle (15) est prévu pour influencer la largeur de la distribution de la taille des grains dans la matière fine prélevée (13), où une conduite de dérivation de l'espace de séparation (8) est reliée au canal d'évacuation (12) par la garniture annulaire (14) et l'amenée d'air de contrôle (15) adaptée sur la garniture annulaire est réglable en ce qui concerne la pression et/ou la quantité d'air de contrôle, en ce que par la conduite de dérivation, un courant de dérivation (17) chargé de la matière de décharge du séparateur ou du gravier de séparateur et partant de l'espace de séparation (8) peut être introduit avec une taille réglable dans le canal d'évacuation (12) pour le mélange air de séparation-matière fine.
  5. Séparateur d'air suivant la revendication 4, caractérisé en ce que la conduite d'air de contrôle (15) contient une soufflerie d'air de contrôle réglable par sa quantité d'amenée et/ou sa pression.
  6. Séparateur d'air suivant la revendication 5, caractérisé en ce que plusieurs conduites partielles d'air de contrôle (19a) sont adaptées sur la circonférence de la garniture annulaire (14), de manière répartie sur cette garniture annulaire.
  7. Séparateur d'air suivant la revendication 4, caractérisé en ce que la garniture annulaire (14) présente au moins un élément étanche (14a) fixe, annulaire, fixé sur la paroi interne du canal d'évacuation (12) et/ou au moins un élément étanche rotatif (14b) annulaire, fixé sur la surface d'attaque supérieure 3a, où les deux éléments étanches sont assemblés dans le sens d'un coude du courant d'air amené (17, 20).
  8. Séparateur d'air suivant la revendication 7, caractérisé en ce que plusieurs éléments étanches fixes et/ou rotatifs sont assemblés en s'engrenant selon une garniture à labyrinthe.
EP00958521A 1999-09-23 2000-09-04 Procede et separateur a air servant a separer de la matiere de chargement fractionnee Expired - Lifetime EP1214155B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19945646 1999-09-23
DE19945646A DE19945646A1 (de) 1999-09-23 1999-09-23 Verfahren und Windsichter zum Klassieren von zerkleinertem Aufgabegut
PCT/EP2000/008629 WO2001021328A1 (fr) 1999-09-23 2000-09-04 Procede et separateur a air servant a separer de la matiere de chargement fractionnee

Publications (2)

Publication Number Publication Date
EP1214155A1 EP1214155A1 (fr) 2002-06-19
EP1214155B1 true EP1214155B1 (fr) 2003-05-28

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EP00958521A Expired - Lifetime EP1214155B1 (fr) 1999-09-23 2000-09-04 Procede et separateur a air servant a separer de la matiere de chargement fractionnee

Country Status (8)

Country Link
US (1) US6644479B1 (fr)
EP (1) EP1214155B1 (fr)
AT (1) ATE241434T1 (fr)
AU (1) AU7001200A (fr)
DE (2) DE19945646A1 (fr)
DK (1) DK1214155T3 (fr)
ES (1) ES2194768T3 (fr)
WO (1) WO2001021328A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN105750200A (zh) * 2016-04-15 2016-07-13 李奇峰 矿渣立磨选粉机

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US7028931B2 (en) * 2003-11-03 2006-04-18 Riley Power, Inc. Dynamic ring classifier for a coal pulverizer
US7267233B2 (en) * 2004-01-07 2007-09-11 Eastman Chemical Company In-line classifier for powdered products
US7028625B1 (en) 2004-11-22 2006-04-18 Riley Power, Inc. Systems and methods for treating and preventing blockages in solid fuel conditioning equipment
US7172146B2 (en) * 2004-12-14 2007-02-06 Riley Power, Inc. Grinding and impeller clip for a coal pulverizer
US7306178B2 (en) * 2005-03-02 2007-12-11 Riley Power, Inc. Grinding chamber side liner for a coal pulverizer
CN100340347C (zh) * 2005-08-03 2007-10-03 连云港市研磨厂 一种碳化硅微粉的生产工艺
US7837138B2 (en) * 2007-05-03 2010-11-23 Riley Power, Inc. Swing hammer for particulate size reduction system
US7516912B2 (en) * 2007-05-03 2009-04-14 Riley Power, Inc. Swing hammer for particulate size reduction system
DE102014117191B3 (de) * 2014-11-24 2016-05-12 Netzsch-Feinmahltechnik Gmbh Verfahren zum Regulieren der Trennwirkung einer Trennvorrichtung und Trennvorrichtung
DE102016121925A1 (de) * 2016-11-15 2018-05-17 Neuman & Esser Gmbh Mahl- Und Sichtsysteme Sichter, Mühle und Verfahren zum Sichten eines Gas-Feststoff-Gemischs
JP6980408B2 (ja) * 2017-05-17 2021-12-15 ホソカワミクロン株式会社 分級機

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GB2163070A (en) * 1984-08-13 1986-02-19 Smidth & Co As F L Separator for sorting particulate material
DE3921823A1 (de) * 1989-07-03 1991-01-17 Krupp Polysius Ag Verfahren und anlage zur zerkleinerung von mahlgut
DK47693A (da) * 1993-04-27 1994-10-28 Smidth & Co As F L Separator til sortering af kornformet materiale
DK173698B1 (da) * 1993-04-27 2001-07-02 Smidth & Co As F L Separator til sortering af kornformet materiale
DE19505466A1 (de) * 1995-02-17 1996-08-22 Krupp Polysius Ag Windsichter
DE19511314C2 (de) * 1995-03-28 1997-02-06 Omya Gmbh Zentrifugalkraftsichter
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Publication number Priority date Publication date Assignee Title
CN105750200A (zh) * 2016-04-15 2016-07-13 李奇峰 矿渣立磨选粉机

Also Published As

Publication number Publication date
DE19945646A1 (de) 2001-04-05
ES2194768T3 (es) 2003-12-01
EP1214155A1 (fr) 2002-06-19
ATE241434T1 (de) 2003-06-15
US6644479B1 (en) 2003-11-11
AU7001200A (en) 2001-04-24
WO2001021328A1 (fr) 2001-03-29
DK1214155T3 (da) 2003-09-22
DE50002386D1 (de) 2003-07-03

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