EP0384101B1 - Séparateur pneumatique pour trier des matériaux granulaires et installation de broyage comportant un tel séparateur - Google Patents

Séparateur pneumatique pour trier des matériaux granulaires et installation de broyage comportant un tel séparateur Download PDF

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Publication number
EP0384101B1
EP0384101B1 EP90100132A EP90100132A EP0384101B1 EP 0384101 B1 EP0384101 B1 EP 0384101B1 EP 90100132 A EP90100132 A EP 90100132A EP 90100132 A EP90100132 A EP 90100132A EP 0384101 B1 EP0384101 B1 EP 0384101B1
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EP
European Patent Office
Prior art keywords
classifier
tube mill
sifter
feed
grinding plant
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
EP90100132A
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German (de)
English (en)
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EP0384101A1 (fr
Inventor
Albert Süssegger
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DE9007802U priority Critical patent/DE9007802U1/de
Publication of EP0384101A1 publication Critical patent/EP0384101A1/fr
Application granted granted Critical
Publication of EP0384101B1 publication Critical patent/EP0384101B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • 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
    • B07B11/06—Feeding or discharging arrangements
    • 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

Definitions

  • the invention relates to a rotary grinding plant with a tube mill and sifter, the tube mill being preceded by a high-pressure roller press with material bed comminution of the feed material and the sifting size being recirculated.
  • the invention is based on such a rotary grinding plant for carrying out the so-called hybrid grinding process (DE-A-37 11 926), namely on the rotary grinding plant known there Tube mill and classifier, the tube mill being preceded by a high-pressure roller press with comminution of the feed material and the classifier sizes being recirculated to the high-pressure roller press and the tube mill.
  • the size of the classifier is divided purely in terms of quantity, and the partial flow of semolina recirculated to the feed shaft of the high-pressure roller press corresponds exactly in grain size distribution and fineness of grain to the partial classifier flow recirculated to the tube mill, i.e. both partial streams contain both fine and coarse classifier grain, while the classifier (Finished product) is withdrawn from the classifier together with the classifying air flow.
  • the invention has for its object to improve the generic rotary grinding plant of DE-A-37 11 926 in such a way that the above-described energy-consuming ventilation and material pressing difficulties in the roll gap of the material bed comminution roller press and thus also the specific energy requirement of the entire rotary grinding plant are significantly further are reduced.
  • the classifier which is a bar basket classifier with a high degree of selectivity, has two separate semolina discharges, namely a semolina discharge for coarse semolina and a separate semolina discharge for the finer semolina.
  • the grain size of the coarse semolina can e.g. B. greater than 0.5 mm and the grain size of the finer semolina z. B. be less than 0.5 mm.
  • SU-A-975 120 does not know a dynamic rod basket sifter, but a static three-product sifter that produces three differently fine finished products, namely coarse semolina, finer semolina as well as the fine material discharged upwards with the air flow from the sifter, which subsequently follows from Visual air flow must be separated in a separator. None of the three different fine products is recirculated in the known sifter. There was no reason to set the classifier of SU-A-975 120 in the rotary grinding plant of DE-A-37 11 926 instead of the classifier there, where the problem or knowledge according to the invention described above was not known. The specialist would have recirculated the fine grains (e.g.
  • the dynamic rod basket sifter integrated into the circulation grinding system according to the invention advantageously has a sifter housing, in the lower region of which the viewing air inlet opening and the discharge opening for the coarse gravel and in the upper region the rotatably arranged rod basket with turbo elements are arranged, which are surrounded by guide elements distributed over the circumference are.
  • a turbo-wind sifter the preliminary separation of the coarse gravel causes wear on the classifier rotor, on the guide elements and on the other parts of the classifier, because with the rod basket classifier used according to the invention, the coarse grains are removed from the classifier (separately from the finer sizes) before they can come into contact with the classifier internals.
  • a pipe (11) is inserted into the lower end of the classifier housing (10), through which the classifying air flow (12), loaded with material to be viewed, is introduced into the classifier from below.
  • the loaded stream of sifting air flows from the bottom upwards through the sifter housing (10), is deflected in its upper region, flows between optionally distributed guide elements (13) distributed over the circumference into the annular channel-shaped viewing zone (14) and in the rotatably arranged in the sifter housing and from above via a shaft (15) driven sifting rotor or rod basket (16) which carries sheet-shaped turbo elements (17) on its circumference and is closed at the bottom by a bottom
  • the classifier according to FIG. 4 has in its lower area a pre-separation zone for the coarse grains, which also collect as a result of the cross-sectional expansion of the classifier housing (10) in the annular space (18) between the classifier housing and the tube (11) projecting into it from below are discharged via the obliquely downwardly inclined tube (19).
  • the operating conditions of the classifier can be set so that the grain size of the coarse grains discharged (20) z. B. is greater than 0.5 mm. It is understood that the built-in sifter is not stressed by the previously separated coarse gravel (20), whereby the wear of the sifter according to the invention is reduced overall.
  • the finer semolina remaining in the classifying air stream falls into the ring channel Visible space (14) down and they are collected via a cone (21), which adjoins the underside of the guide elements (13) downwards, and via an obliquely downwardly inclined tube (22) as a finer size (23) with a Grain size of z. B. less than 0.5 mm separated from the coarse semolina (20) from the classifier.
  • the fine material is taken along by the sifting air flow and drawn out of the classifier with this via a non-rotating fines discharge housing (24) placed on the rod basket (16), as indicated by arrow (25).
  • the classifier of FIG. 4 is switched on in a circulation grinding plant with a tube mill (26), which is preceded by a high-pressure roller press (27), the classifier discharge for the coarse grains (20) for good feed of the roll press and the classifier discharge for the finer semolina (23) are returned to the tube mill (26).
  • the high-pressure roller press (27) is the feed material to be shredded (28), e.g. B. not pre-crushed cement clinker with a grain size of up to 100 mm, for example, via a feed shaft (29).
  • the grain size of an essential part of the feed material (28) is larger than the width of the narrowest nip of z. B.
  • the pressing force of the rollers of the roller press which presses on the material (28, 20), is more than 2 t / cm roller length, for example 6 to 9 t / cm.
  • the feed material is shredded in the gap between the rollers by a combined single-grain shredder and material bed shredder.
  • the feed material to be comminuted is fed to the nip of the press (27) in such a large amount via the feed chute (29) arranged above the nip that the material to be comminuted and drawn in between the rollers by friction pushes the rollers apart and the Particles of the feed material crush each other in the roller gap in a bed or in the collective or in a bed of material.
  • the cement clinker emerges from the nip crushed and partially agglomerated, i. H. to Schülpen (30) pressed, the proportion of particles already reduced to the desired cement fineness can already be relatively high (approx. 25% less than 90 ⁇ m). While the bulk density of the fresh ground material (28) is 1,600 kg / m3, the density of the pressed slug (30) is approx. 2,400 kg / m3.
  • the tube mill (26) of FIG. 1 is an airflow mill with a central good inlet opening (31) through one end wall spigot and a central discharge opening (32) through the other end wall spigot.
  • the tube mill has, as usual, a discharge wall (33) in front of its discharge opening (32), the openings of which only allow pre-ground material of a certain grain size to pass through, which is represented by the arrow (34).
  • the discharge (30) of the roller press (27) is introduced into the material discharge of the tube mill (26) through a centrifugal shredding device (not shown) through the central mill discharge opening (32) and through the central opening of the discharge wall (33), in countercurrent to the tube mill discharge material, which together with the roller press discharge deagglomerated in the deagglomerating chamber (35) through peripheral openings of the same discharge wall (33) as material flow (34) via the riser pipe (11), the lower part (11a) of which passes to the central material discharge opening (32 ) connects the tube mill, is transported pneumatically to the classifier (10) with the aid of a conveying air flow (36).
  • the roll press discharge material (30) arriving in the disagglomerating chamber (35) of the tube mill (26) (scraper fragments) is designated by reference number (37a). These Schülpen Fragments (37a) are dissolved autogenously by pure circulation movement.
  • the classifier (10) sifted the sufficiently fine finished product both from the deagglomerated roller press discharge material (30) and from the grinding product of the tube mill (26), namely as a fine grain fraction, which via the line (25) and dust separator (37), e.g. . B. electrostatic dust collector is withdrawn, from which the fine finished product (38), in the exemplary embodiment the sufficiently finely ground cement is removed.
  • An induced draft fan is indicated with (39).
  • an originally existing tube mill can be used without having to be converted.
  • a perforated partition (41) is installed, which separates the actual grinding chamber containing the grinding media (42) from the disagglomerating chamber (35) located between the discharge wall (33) and the partition (41). separates, provided the tube mill was not originally a two-chamber mill with a partition.
  • the tube mill can also have a material failure housing with a bucket elevator for transporting the ground material to the classifier.
  • the recirculating grinding system of FIG. 1 can be used as a grinding drying system for grinding and drying moist material, e.g. B. from moist starting material for the production of raw cement meal.
  • the riser (11) between the mill (26) and classifier (10) serves as a current dryer.
  • the tube mill (26) another fine comminution device would also be conceivable.
  • Fig. 2 shows the flow diagram of a grinding drying plant for grinding and drying moist starting material for the production of raw cement meal.
  • the starting material (28) is fed through the feed shaft (29) of the high-pressure roller press (27) and comminuted there, as in the exemplary embodiment in FIG. 1.
  • the slugs (30) which are formed are introduced via a conveyor device (47) and via a material lock (48) into the material inlet (49) of an impact hammer mill (50) with a closed bottom and are deagglomerated there.
  • a hot gas line (51) shown in dashed lines, is connected to the good inlet (49) of the deagglomerator (50).
  • Exhaust gas from a preheater for cement raw meal from a cement clinker combustion plant, hot exhaust air from a cement clinker cooler and / or hot gas from another hot gas generator can be used as hot gas.
  • the riser (11, 12) designed as a current dryer, in which the material is dried and which leads to the classifier (10), the classifier discharge (19) for the coarse grains (20) a conveyor (52) for the feed (29) of the roller press (27) and the sifter discharge (22) for the finer grains (23) for the feed of a tube mill (26).
  • the finer semolina (23) are fed into the tube mill (26) together with a hot gas stream (53), which can be branched off from the hot gas line (51), e.g. B. consists of hot flue gas or hot exhaust gas from a cement clinker combustion plant and in so far Has inert gas property.
  • a hot gas stream (53) which can be branched off from the hot gas line (51), e.g. B. consists of hot flue gas or hot exhaust gas from a cement clinker combustion plant and in so far Has inert gas property.
  • the moist feed material (28) to be treated in the mill-drying system according to FIG. 2 are not moist cement raw materials, but rather e.g. B. is wet coal.
  • the material is introduced via line (54) into the riser (11, 12) leading to the classifier (10).
  • the fine material discharge line (25) of the classifier (10) leads to the separator (37) such as a filter, separating cyclone or the like, which is conveyed via a conveyor (55), e.g. B. screw conveyor the fines as finished goods (38), z. B. completely dried and ground cement raw meal or also completely dried and ground coal, from the classifying gas stream or drying gas stream (43).
  • the exhaust gas line (43) is connected via the branch line (44, 45) to the hot gas line (51) connected to the product inlet (49) of the deagglomerator (50) and / or via a branch line (46) to the product discharge of the deagglomerator (50) connected riser (11, 12) in connection.
  • FIG. 3 shows a classifier (10) to which the classifying material is fed separately from the classifying air.
  • This sifter (10) is also switched into a circulation grinding plant with a tube mill (26) and a high-pressure roller press (27).
  • the discharge line (20) of the classifier (10) for the coarse semolina to feed the high-pressure roller press (27) and the discharge line (23) for the finer semolina to the material inlet of the tube mill (26) are recirculated.
  • the mill (26) can be operated in an open pass.
  • the material to be discharged from the mill is fed via line (56) to a spreading disc rotating within the classifier (10).

Claims (3)

  1. Installation de broyage par recirculation avec un tube de broyage (26) et un séparateur (10), dans laquelle en amont du tube de broyage (26) est montée une presse à cylindres à haute pression (27) avec fragmentation du lit du produit d'alimentation (28) et l'on fait recirculer les grains du séparateur, installation caractérisée en ce que le séparateur (10), qui est un séparateur à panier tournant avec un panier (16) disposé de façon à pouvoir tourner et pourvu d'éléments de turbine (17), présente deux extractions de grains séparées l'une de l'autre, à savoir une extraction de grains (19, 20) pour des grains grossiers et une extraction de grains (22, 23) séparée de la précédente pour des grains plus fins et en ce que l'extraction de grains (19, 20) pour les grains grossiers est mise en recirculation seulement vers la presse à cylindres à haute pression (27) et l'extraction de grains (22, 23) pour les grains plus fins est mise en recirculation seulement avec le tube de broyage (26).
  2. Installation de broyage par recirculation selon la revendication 1, caractérisée en ce que l'on dispose sur la sortie du produit du tube de broyage (26) un tambour de désagglomération (35) qui tourne en même temps que le tube de broyage, tambour dont l'entrée de produit est reliée à l'extraction (30) de la presse à cylindres à haute pression (27) et dont la sortie de produit est en liaison avec le séparateur (10) dont la conduite d'extraction (22, 23) pour les grains plus fins, mène à l'entrée de produit du tube de broyage (26).
  3. Installation de broyage par recirculation selon la revendication 2, caractérisée en ce que dans le tube de broyage (26) on dispose une paroi perforée de séparation (41) qui sépare une chambre de broyage, contenant des grains grossiers de broyage, de la chambre de désagglomération (35) équipée sans grains grossiers de broyage.
EP90100132A 1989-02-20 1990-01-04 Séparateur pneumatique pour trier des matériaux granulaires et installation de broyage comportant un tel séparateur Expired - Lifetime EP0384101B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9007802U DE9007802U1 (de) 1989-02-20 1990-01-04 Umlaufmahlanlage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905123 1989-02-20
DE3905123A DE3905123A1 (de) 1989-02-20 1989-02-20 Sichter zum sichten von koernigem gut und mahlanlage mit einschaltung eines solchen sichters

Publications (2)

Publication Number Publication Date
EP0384101A1 EP0384101A1 (fr) 1990-08-29
EP0384101B1 true EP0384101B1 (fr) 1995-10-11

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EP90100132A Expired - Lifetime EP0384101B1 (fr) 1989-02-20 1990-01-04 Séparateur pneumatique pour trier des matériaux granulaires et installation de broyage comportant un tel séparateur

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Country Link
US (1) US5005770A (fr)
EP (1) EP0384101B1 (fr)
AT (1) ATE128889T1 (fr)
DE (4) DE8916267U1 (fr)
DK (1) DK0384101T3 (fr)
ES (1) ES2077590T3 (fr)

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CN103285997A (zh) * 2013-05-22 2013-09-11 江苏新业重工股份有限公司 一种粗粉分离器
CN103263075B (zh) * 2013-06-11 2015-08-12 红塔烟草(集团)有限责任公司 高效节能打叶风分新工艺及设备
DE102013020888A1 (de) 2013-12-11 2015-06-11 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage mit Vorsichter und Kugelmühle
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RU2623761C2 (ru) * 2015-02-16 2017-06-29 Министерство сельского хозяйства Российской Федерации Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Вятская государственная сельскохозяйственная академия" (ФГБОУ ВПО ВГСХА) Центробежно-пневматический сепаратор зернового материала
CN107127157B (zh) * 2017-06-29 2019-07-12 西安欧中材料科技有限公司 一种分离球形金属粉末中异形粉的设备及其方法
CN108187879B (zh) * 2017-12-29 2023-11-28 成都大宏立机器股份有限公司 一种花园式厂房
SE543276C2 (sv) * 2019-03-19 2020-11-10 Airgrinder Ab Förfarande och anordning för att söndermala och t orka ett material eller en materialblandning
CN112354703B (zh) * 2020-10-20 2021-08-31 江苏吉达机械制造有限公司 一种可调控三分离选粉机
CN112808368A (zh) * 2021-01-04 2021-05-18 中冶长天国际工程有限责任公司 一种破碎机及其破碎机细颗粒脱除装置与脱除方法
CN114084429B (zh) * 2021-11-10 2023-08-08 麻阳蓝凤凰农业发展有限公司 一种红糖后加工设备
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Publication number Publication date
DE59009754D1 (de) 1995-11-16
DK0384101T3 (da) 1996-03-04
EP0384101A1 (fr) 1990-08-29
DE9007802U1 (de) 1996-08-01
DE3905123A1 (de) 1990-08-23
US5005770A (en) 1991-04-09
ES2077590T3 (es) 1995-12-01
DE8916267U1 (de) 1996-08-08
ATE128889T1 (de) 1995-10-15

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