EP3079828A1 - Système de broyage à circulation à pré-tamis et broyeur à galets - Google Patents

Système de broyage à circulation à pré-tamis et broyeur à galets

Info

Publication number
EP3079828A1
EP3079828A1 EP14809390.9A EP14809390A EP3079828A1 EP 3079828 A1 EP3079828 A1 EP 3079828A1 EP 14809390 A EP14809390 A EP 14809390A EP 3079828 A1 EP3079828 A1 EP 3079828A1
Authority
EP
European Patent Office
Prior art keywords
grinding
ground
fine
opening
classifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14809390.9A
Other languages
German (de)
English (en)
Inventor
Jörg BINNER
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag 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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP3079828A1 publication Critical patent/EP3079828A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Definitions

  • the invention relates to a Kreislaufmahlstrom for grinding of fresh goods, comprising a first apparatus for grinding the fresh material, wherein the first device for grinding the fresh material ground millbase produces a static waiter for precaution of the ground millbase with an entry port for the ground millbase, a discharge opening for a sifted coarse semolina fraction and a further discharge opening for the discharge of a fine-grained Austragsguts, a device for prospecting of fines with a discharge for discharging a separated coarse grain fraction, with subsequent recirculation to the first apparatus for grinding the fresh material, a discharge for the fine material and at least an entry opening, wherein one of the at least one entry opening communicates with the discharge opening for the fine-grained discharge material of the static cautery, a second device for grinding Mahlg ut, wherein the second apparatus for grinding regrind produces a ground regrind.
  • the fresh material is placed in a device for grinding regrind.
  • a prime example is the production of cement and / or cement raw meal by grinding cement clinker, blastfurnace slag, limestone and / or gypsum.
  • roller presses are used for comminuting the fresh product. Roll Press ',' Good Bed Roll Mill 'or English, High Pressure Grinding Roller Press' (HPGR) are called.
  • the ground regrind from the apparatus for grinding the fresh material usually consists of still existing coarse material and a finer-grained fraction.
  • the milled material to be ground is separated from the coarse material and separated in a prospecting device.
  • dynamic classifiers in particular rod basket classifiers
  • two-stage processes in which the dynamic classifier is preceded by a static guardian, for example a cascade classifier. This not only reduces the wear of the dynamic classifier.
  • a static guardian for example a cascade classifier.
  • a Kreislaufmahlstrom is known in which the ground millbase is fed to a high-pressure roll mill or roller press a arranged underneath cascade classifier.
  • This is another classifier, for example, downstream of a dynamic rod basket sifter, the reformgutaustrag the cascade classifier is supplied pneumatically, which leads by waiving mechanical conveyors to lower operating and investment costs and less space.
  • the Nachsichter is arranged above the roller press, in which the coarse material discharge is recirculated.
  • a further apparatus for grinding regrind in the Kreislaufmahlstrom such as a ball mill (tube mill, tubular ball mill).
  • DE 10 2006 017 510 A1 describes a Kreislaufmahlstrom with a first grinding unit, such as a roller press for Vormahlung fresh food, a dynamic classifier and a tube mill.
  • the dynamic classifier can be preceded by a cascade classifier.
  • a separation into two grinding circuits is provided, which are coupled via the two-chamber dynamic rod basket classifier.
  • the first grinding unit (roller press) and, if present, the static cautery are arranged, in the second the tube mill.
  • the tube mill is used exclusively for grinding the fine siftings discharged in the dynamic sifter. Since the coarse grit discharge is recirculated from the rod cage sifter to the roller press, the use of the tube mill does not result in a costly lowers the number of cycles in the first cycle. Although not described in detail, it is also to be assumed that the separated coarse fraction from the cautioner should either go back to the roller press, which would lead to the disadvantages already mentioned above, or would be eliminated from the circulation to the detriment of the efficiency of the process. In addition, the advanced technique of the multi-chamber classifier required here in practice is associated with higher investment and maintenance costs than with simple rod basket sifters.
  • the sizing strainer suitable in particular for the required high throughputs not only sort out a pure fine fraction, but merely separate a fine and medium fraction from a coarse fraction, which adversely affects the efficiency of the screening process in the downstream classifier or the particle size distribution of the end product and / / or economically unfavorable additional measures required.
  • the object of the invention is therefore to provide a Kreislaufmahlstrom for grinding of fresh goods available, which overcomes the disadvantages of the prior art.
  • a static cascade classifier is used as the static guardian. It is further provided as a second apparatus for grinding regrind a ball mill so turn on the Kreislaufmahlstrom for grinding of fresh goods, that firstly the Guteinlauf the ball mill is connected to the discharge for the coarse Gr manefr press of the static cautionary. The separated in the direction of coarse-grained fraction is thus fed to the further grinding of the ball mill. For the benefit of material transport, it is obvious to arrange the ball mill below the caution. Secondly, the material discharge of the ball mill is connected to an entry opening of the device for prospecting of fine material, so that the fine material portion is selected from the ground product to be discharged from the ball mill.
  • a Kreislaufmahlstrom is thus provided, is ground in the fresh material in a first apparatus for grinding, the resulting ground millbase in a static caution in a fine granular and a coarse-grained fraction is separated.
  • the fine-grained fraction can be supplied to the apparatus for prospecting fine material in a pneumatic, ie energy and cost-effective way.
  • the coarser semolina fraction is first ground in the ball mill and then passes as a ground discharge material also in the classifier, where a fine material fraction is deposited and a coarse grain fraction discharged and recirculated to the first device for grinding.
  • the cascade classifier employs a classifier that not only guards the ground material from the first milling device, but also deagglomerates it, thus obviating the need for ball mill desaggregation processes (with the disadvantages described above). Furthermore, the semolina fraction from the static precautionary need not be returned mechanically to the first apparatus for grinding (with the disadvantages also described above), but is ground in the ball mill. This results in ground material to be discharged, which can be conveyed completely pneumatically and, together with the fines content of the first device for milling fresh material to be discharged, leads to a favorable particle size distribution of the cement or cement raw meal.
  • the milling of the semolina fraction from the static cautery in the ball mill in the second partial cycle leads to a reduction in the number of cycles in the first partial cycle.
  • the use of a static cautery between the two grinders reduces the volume of the crop into the ball mill by looking at the fine-grained stock in the static cautery.
  • the static guardian is a cascade classifier.
  • Cascade classifiers not only allow a separation of coarse-grained and finer-kings in the ground regrind. In addition, they bear the impact of the good particles they contain on the cas- kadenartig arranged sheets in their sighting shaft to a considerable extent at a deagglomeration of agglomerated Mahlgutpelle at, as they arise in devices for grinding regrind, especially in roller presses or high-pressure roller presses.
  • a device for the prospect of fines a rod basket sifter Such a dynamic reformertypus is well known from practice, low maintenance and can be pneumatically flowed for the Guteintrag, which is energy and cost. Both the static cautery viewing process and the ball milling process result in such fine-grained, i.e. light Austragsgut that this, in the embodiment of the invention, in each case suspended in a conveyluftvolumenstrom and pneumatically the Stabkorbsichter can be supplied. Depending on the classifier design, the view air volume flows pass through the same entry opening or through two different entry openings into the housing of the rod cage sifter for the common view.
  • the sieved fines are collected in a discharge device of the bar cage and pneumatically guided to a separator where the fines are separated from the classifying air.
  • the pneumatic transport of the ground output of the ball mill offers significant advantages over mechanical transport in terms of energy consumption, investment and maintenance costs. Should it be unavoidable because of the overall structure of a plant for cement production, a first part of the way from the ball mill to the rod basket sifter could also be bridged by means of a mechanical device, such as a bucket elevator.
  • a roller press, a vertical mill or an impact hammer mill is used as the first device for grinding the fresh material.
  • the invention is not limited to a Mahlvoriquessart here, but it may be useful to use different grinding devices according to the desired particle size distribution of the cement and depending on the nature of the fresh product.
  • energy Cost efficiency and material throughput and ease of operation is particularly close to the use of roller presses and vertical mills.
  • Impact hammer mills also have energy advantages compared to ball mills.
  • Figure 1 a Kreislaufmahlstrom invention for grinding fresh food in the embodiment with roller press, ball mill, cascade classifier and shown in vertical section Stabkorbsichter;
  • Figure 2a a section of the Kreislaufmahlstrom invention
  • Milling of fresh material representing the embodiment with impact hammer mill as the first device for grinding the Frischguts;
  • Figure 2b a section of the Kreislaufmahlstrom invention for
  • Milling fresh food representing the embodiment with vertical mill as the first device for grinding the fresh material.
  • the fine-grained material to be discharged 8 is supplied with the classifying air volume flow 24 to the rod basket classifier 15 by pneumatic means. Furthermore, in the cascade classifier 4, the coarse-grained fraction falls downwards, cascading baffles arranged downwards. As a result of the impact of the coarse-particle slab material on the sheets, the material agglomerates therein are desag- glomerated and discharged downwards as semolina fraction 9 from the cascade classifier 4 through the discharge opening 7. The semolina fraction 9 falls into the product inlet 10 of a ball mill 1 1 arranged below the cascade classifier 4.
  • the milled Austragsgut 13 leaves the ball mill 1 1 through the Gutauslauf 12. It is the Stabkorbsichter 15 supplied by pneumatic means through the reformulationvolumenstrom 25. It could be on the way between ball mill 1 1 and rod basket sifter 15 first, a mechanical transport of the ground Austragsguts 13, for example by means of a bucket elevator, done (not shown).
  • the classifying air volume flows 24, 25 with the fine-grained Austragsgut 8 from the cascade classifier 4 and the ground Austragsgut 13 from the ball mill 1 1 are introduced through at least one entry port 14a, 14b in the rod basket sifter 15.
  • the suspended in the classifying air Austragsgut 8, 13 flows to the rod basket sifter 15 as shown laterally and is accelerated by the rotational movement of the rod basket sifter 15 in the viewing zone.
  • the centrifugal forces acting on the particles of the prepares result in cooperation with the friction force of the air flow to a separation of the prepare for the air flow to a separation of the prepare for the body into a coarse grain fraction 17 and a fraction of fines 18.
  • the coarse grain fraction 17 is from the rod basket sifter 15 by gravity down from the viewing zone and through the discharge opening 1 6 discharged. Subsequently, the coarse grain fraction 17 is returned by mechanical means from above to the roller press 2 (recirculation), where it is ground together with the fresh material from the fresh material supply 1.
  • the sieved fines 18 are transported pneumatically by the classifying air stream out of the rod cage sifter 15 and reach the discharge device 28.
  • the discharge air flow 20 leaves the discharge air flow 20 with the fines and reaches the discharge device (here a cyclone) 21.
  • the fine material 23 is separated from the classifying air stream 22 and can thus be stored in further processes of cement production in silos (not in the picture).
  • FIG. 2 a shows a detail of the cycle grinding plant according to the invention for grinding fresh food.
  • the first device (2, 26, 27) for grinding the fresh product instead of a roller press 2 as shown in Figure 1 by an impact hammer mill 26 is formed.
  • the structure and method are as shown in Figure 1.
  • FIG. 2b a section of the Kreislaufmahlstrom invention for grinding fresh food is shown in Figure 2b.
  • the first device (2, 26, 27) for grinding the fresh product instead of a roller press 2 as in Figure 1 or an impact hammer mill 26 as shown in Figure 2a by a vertical mill 27 is formed.
  • the structure and method are as shown in Figure 1.
  • roller press 17 Coarse grain fraction Ground regrind 18 fines

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

L'invention concerne un système de broyage à circulation permettant de broyer un produit frais, comprenant un premier dispositif (2, 26, 27) permettant de broyer le produit frais, un pré-tamis statique (4) permettant le tamisage préliminaire du produit broyé (3) et pourvu d'une ouverture d'entrée (5) pour le produit broyé (3), d'une ouverture de sortie (7) pour une fraction grossière menue (9) et d'une autre ouverture de sortie (6) pour un matériau sortant à grains fins (8), un dispositif (15) permettant de séparer la matière fine (18) et pourvu d'une ouverture de sortie (16) pour une fraction grossière de grains (17), dans le prolongement de laquelle se situe une recirculation vers le premier dispositif de broyage, d'une ouverture de sortie (19) pour la matière fine (18) et d'au moins une ouverture d'entrée (14a, 14b), une ouverture d'entrée (14a, 14b) étant reliée à l'ouverture de sortie (6) du pré-tamis statique (4), le système de broyage comprenant également un deuxième dispositif de broyage (11). Selon l'invention, le pré-tamis statique (4) est un tamis en cascade (4) et le deuxième dispositif de broyage (11) se présente sous la forme d'un broyeur à galets (11), le broyeur à galets (11) comprenant une entrée de produit (10) reliée à l'ouverture de sortie (7) pour la fraction grossière menue (9) du pré-tamis statique (4) et une sortie de produit (12) reliée à une ouverture d'entrée (14a, 14b) du dispositif (15) pour la séparation du produit fin (18).
EP14809390.9A 2013-12-11 2014-12-09 Système de broyage à circulation à pré-tamis et broyeur à galets Withdrawn EP3079828A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013020888.2A DE102013020888A1 (de) 2013-12-11 2013-12-11 Kreislaufmahlanlage mit Vorsichter und Kugelmühle
PCT/EP2014/076964 WO2015086554A1 (fr) 2013-12-11 2014-12-09 Système de broyage à circulation à pré-tamis et broyeur à galets

Publications (1)

Publication Number Publication Date
EP3079828A1 true EP3079828A1 (fr) 2016-10-19

Family

ID=52016080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14809390.9A Withdrawn EP3079828A1 (fr) 2013-12-11 2014-12-09 Système de broyage à circulation à pré-tamis et broyeur à galets

Country Status (5)

Country Link
US (1) US20160288135A1 (fr)
EP (1) EP3079828A1 (fr)
CN (1) CN105899295A (fr)
DE (1) DE102013020888A1 (fr)
WO (1) WO2015086554A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013103013A1 (de) * 2013-03-25 2014-09-25 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Verfahren zur Erzeugung eines optimierten Granulats
DE102014010065B3 (de) * 2014-07-08 2015-07-09 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage mit zweitem Mahlkreislauf und Verfahren zum Betrieb der Kreislaufmahlanlage
US20160214895A1 (en) * 2015-01-27 2016-07-28 International Material Recovery Inc. Apparatus and method for recycling gypsum
DE102015001404B3 (de) * 2015-02-04 2016-08-04 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage mit zwei Mahlvorrichtungen und Verfahren zum Betrieb der Kreislaufmahlanlage
CN113070151A (zh) * 2021-03-18 2021-07-06 沈阳盛世五寰科技有限公司 一种降低含磁性矿石加工成本的粉碎分级工艺
CN113368993B (zh) * 2021-04-21 2023-05-26 克拉玛依博达生态环保科技有限责任公司 一种利用石油钻井岩芯和岩屑多级分离制陶装置
DE202021102121U1 (de) * 2021-04-21 2021-05-25 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage

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DE3302176A1 (de) * 1983-01-24 1984-07-26 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und anlage zur kontinuierlichen druckzerkleinerung sproeden mahlgutes
DE3905123A1 (de) 1989-02-20 1990-08-23 Kloeckner Humboldt Deutz Ag Sichter zum sichten von koernigem gut und mahlanlage mit einschaltung eines solchen sichters
DE4223762B4 (de) * 1992-07-18 2009-07-23 Khd Humboldt Wedag Gmbh Sichtereinrichtung zum Sichten von körnigem Gut und Umlaufmahlanlage mit Einschaltung einer solchen Sichtereinrichtung
DE19944421A1 (de) * 1999-09-16 2001-03-22 Kloeckner Humboldt Wedag Sichtereinrichtung zur Sichtung von körnigem Gut
DE10221739A1 (de) 2002-05-16 2003-12-04 Kloeckner Humboldt Wedag Kreislaufmahlanlage mit Mühle und Sichter
DE102004051477B4 (de) * 2004-10-22 2008-10-02 Alstom Technology Ltd. Verfahren zur Regulierung der Feststoffumlaufmenge eines zirkulierenden Wirbelschichtreaktorsystems
CN2859249Y (zh) * 2006-01-05 2007-01-17 黄胜建 波形分行分层节能给煤机
DE102006017510A1 (de) 2006-04-13 2007-10-18 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage
CN101657268B (zh) * 2007-04-06 2013-06-05 寿技研工业株式会社 矿物的分选方法及其分选装置
CN202028542U (zh) * 2010-12-27 2011-11-09 三一重工股份有限公司 骨料筛分输送系统
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Also Published As

Publication number Publication date
DE102013020888A1 (de) 2015-06-11
WO2015086554A1 (fr) 2015-06-18
CN105899295A (zh) 2016-08-24
US20160288135A1 (en) 2016-10-06

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