EP0366516A1 - Verfahren zum Trocknen und Mahlen von feuchten Mineralien und Anlage zur Durchführung dieses Verfahrens - Google Patents

Verfahren zum Trocknen und Mahlen von feuchten Mineralien und Anlage zur Durchführung dieses Verfahrens Download PDF

Info

Publication number
EP0366516A1
EP0366516A1 EP89402783A EP89402783A EP0366516A1 EP 0366516 A1 EP0366516 A1 EP 0366516A1 EP 89402783 A EP89402783 A EP 89402783A EP 89402783 A EP89402783 A EP 89402783A EP 0366516 A1 EP0366516 A1 EP 0366516A1
Authority
EP
European Patent Office
Prior art keywords
grinding
mill
fine grinding
grinding chamber
chamber
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Withdrawn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
EP89402783A
Other languages
English (en)
French (fr)
Inventor
Francis Dambrine
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.)
F C B
Original Assignee
F C B
Fives Cail Babcock SA
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 F C B, Fives Cail Babcock SA filed Critical F C B
Publication of EP0366516A1 publication Critical patent/EP0366516A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • B02C23/18—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

Definitions

  • the present invention relates to the drying and grinding of wet materials, for example one or more raw materials for the manufacture of a cement clinker, and more particularly the methods and installations using for these operations a rotary tubular mill with divided balls in several chambers and provided with an inlet at each of its ends and peripheral outlet orifices situated between the pre-grinding and fine grinding chambers.
  • the wet product to be ground is introduced at one end of the tubular mill, into a drying chamber.
  • This chamber can be confused with the pre-grinding chamber or separated from it by a partition provided with levers which allow the passage of the product from one chamber to the other while preventing the exit of the grinding bodies contained in the pre-grinding.
  • the pre-grinding and fine grinding chambers are separated from each other by perforated partitions between which the peripheral outlet orifices are located, arranged in one or two circular rows.
  • the product leaving the pre-grinding chamber through said orifices is sent to a classifier where it is divided into two fractions: a fine fraction constituting the finished product and a coarse fraction which is introduced into the fine grinding chamber, through the other end of the crusher.
  • the product leaving the fine grinding chamber through the peripheral orifices is also sent to the classifier which may or may not be the one used in the first step. Gases are admitted at the two ends of the mill, evacuated by the peripheral orifices, which open out into a circular cover surrounding the mill, and sent to a separator and a dust collector; the larger particles separated from the gases are sent to the classifier or directly to the fine grinding chamber and the finer particles are removed with the finished product.
  • the object of the present invention is to reduce the specific consumption and to increase, for a given dimensioning of the tubular mill, the capacity of the installations of the type described above.
  • the drying and grinding process object of the invention, is characterized in that at least a fraction of the dried and partially milled product leaving the pre-grinding chamber is subjected to crushing grinding in a forced-feed roller mill and at least a fraction of the product leaving said cylinder mill is introduced into the fine grinding chamber of the tubular mill, the product leaving this latter chamber being sent to the classifier.
  • a fraction of the product leaving the cylinder mill can be returned to the inlet of said mill.
  • a partial flow of classifier refusals and / or a fraction of the product leaving the fine grinding chamber and / or a portion of the largest particles separated from the gases may be returned to the inlet of the cylinder mill.
  • the installation which is the subject of the invention is characterized in that it comprises, in addition to the conventional multi-chamber tubular crusher, a cylinder crusher designed to operate as a forced feed, the inlet of which is connected to the outlet of the chamber pre-grinding of the tubular crusher and the outlet of which is connected to the inlet of the fine grinding chamber.
  • a distributor may be provided at the outlet of the roller mill to allow recycling of a fraction of the product leaving said mill, one outlet of this dispenser being connected to the inlet of the fine grinding chamber and the other outlet being connected at the entrance of the roller mill.
  • Distributors may also be placed on the outlet of the classifier rejects and on the outlet of the fine grinding chamber to allow a fraction of the products extracted by these outlets to be returned to the inlet of the roller mill.
  • the pre-grinding and fine grinding chambers can be separated by a solid partition, the outlet orifices then being arranged in two circular rows, on either side of this partition.
  • the single figure in this drawing schematically represents an installation for implementing the invention essentially comprising a rotary tubular dryer-mill 10, a cylinder mill 12, a classifier 14 and a separator-dust collector 16.
  • the dryer-mill 10 is supported and rotated by conventional means. It has an inlet at each of its ends and is divided into a drying chamber 18, a pre-grinding chamber 20 and a fine grinding chamber 22.
  • the chambers 18 and 20 are separated by a partition 24 provided with blades and d a central opening making it possible to transfer the products from one chamber to the other while preventing the grinding bodies (balls) contained in the chamber 20 from passing into the chamber 18.
  • the chambers 20 and 22 are separated by a solid partition 26. Holes 28-30 are formed in the shell of the mill, in two circular rows arranged on either side of the partition 26. Grids 32-34 are placed in front these orifices to prevent the passage of the grinding bodies and limit the particle size of the products leaving the chambers 20 and 22.
  • the orifices 28-30 open into covers 36-38 surrounding the grinder.
  • the lower part of each of these hoods is in the form of a hopper and is provided with an evacuation orifice connected, directly or by any means of transport, to the base of an elevator, for example with buckets, 40-42.
  • a distributor 44 placed on the evacuation orifice of the cover 38 makes it possible to direct a part of the products leaving the chamber 22 towards the elevator 40.
  • the upper part of the covers 36-38 is connected to a separation-dedusting unit shown diagrammatically at 16.
  • this unit the gases escaping from the chambers 20 and 22, through the orifices 28-30 are freed from the grains and dust which they carry.
  • the gases captured by the covers 36 and 38 could be treated in two separate units.
  • the roller mill 12 is designed to operate in forced feeding. In this operating mode, the spacing of the cylinders is adjusted to a low value and the mill is supplied with a flow rate equal to several times the theoretical flow rate corresponding to this spacing. The cylinders are then separated from each other against the action of the springs or jacks, which tend to bring them closer, and exert on the layer of compressed material between the cylinders a pressure all the greater as the flow of material is more important. There is then compaction and self-grinding within the layer of material and production of a large number of particles much finer than those which would be obtained by grinding grain by grain.
  • the roller mill 12 is supplied by the elevator 40.
  • the crushed products are collected in a hopper placed under the cylinders and a distributor 46 makes it possible to divide them into two streams, one of which is sent to the fine grinding chamber 22 of the tubular crusher and the other is recycled, for example by means of the elevator 40.
  • the classifier 14 can be an air separator, static or dynamic, or of any other known type. It is supplied by the elevator 42 and has two outputs: an output for fine products (48), and an output for rejects. A distributor 50 placed on this last outlet makes it possible to recycle a fraction of the rejects in the fine grinding chamber 22 and to bring the other fraction to the inlet of the roller mill 12.
  • the separator-dust collector 16 the relatively large particles are separated from the dust which is mixed with the finished product, the first being sent either to the inlet of the roller mill 12 or to the fine grinding chamber 22.
  • the operation of this installation is as follows:
  • the wet product to be ground M is introduced with a hot gas G into the chamber 18 where it is dried; this room can be provided with levers or other organs improving heat exchange.
  • the dried product passes into chamber 20 which contains balls ensuring pre-grinding of the product up to a particle size suitable for the operation of the roller mill 12.
  • the product having the desired particle size passes through the grid 32, falls into the bottom of the cover 36, through the orifices 28, then is taken up by the elevator 40 and discharged into the hopper 13 loaded on the mill 12 .
  • the dried and pre-crushed product undergoes additional grinding before being returned to the chamber 22 of the tubular crusher 10 where it is subjected to a final grinding by the balls contained in this chamber; a fraction of the product leaving the mill 12 can be recycled (link 47).
  • the product having the desired particle size crosses the grid 34 and falls into the bottom of the cover 38, through the orifices 30, and is taken up by the elevator 42 which supplies the classifier 14.
  • the finished product leaves the finished product which is discharged at 48 and, on the other hand, the rejects which are returned to the chamber 22 of the mill 10, either wholly or partially; in the latter case, the other fraction of the refusals is sent to the supply to the roller mill 12 (link 51).
  • a part of the product leaving the chamber 22 can optionally be brought back to the inlet of the mill 12 by the distributor 44 and the link 45.
  • the drying gas having passed through the chambers 18 and 20 and the ventilation air A or the gases necessary for drying the abrasive or rheologically plastic moist products admitted into the chamber 22 are collected in the covers 36 and 38 and freed of the grains and dust. which they transport in the separator-dust collector 16.
  • the fine particles are mixed with the finished products and the larger grains are returned either to the chamber 22 of the mill 10, or to the mill 12.
  • the invention also makes it possible to substantially increase the capacity of an existing installation with a tubular crusher, by adding a cylinder crusher to it.
  • the pre-grinding chamber can be omitted or confused with the drying chamber.
  • the solid partition 26 could be eliminated, the orifices 28 and 30 being combined and the covers 36 and 38 replaced by a single cover; in this case, the products collected at the bottom of the hood will be shared between the cylinder crusher and the classifier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP89402783A 1988-10-21 1989-10-10 Verfahren zum Trocknen und Mahlen von feuchten Mineralien und Anlage zur Durchführung dieses Verfahrens Withdrawn EP0366516A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813814A FR2638105A1 (fr) 1988-10-21 1988-10-21 Procede de sechage et de broyage de matieres minerales humides et installation pour la mise en oeuvre de ce procede
FR8813814 1988-10-21

Publications (1)

Publication Number Publication Date
EP0366516A1 true EP0366516A1 (de) 1990-05-02

Family

ID=9371192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402783A Withdrawn EP0366516A1 (de) 1988-10-21 1989-10-10 Verfahren zum Trocknen und Mahlen von feuchten Mineralien und Anlage zur Durchführung dieses Verfahrens

Country Status (2)

Country Link
EP (1) EP0366516A1 (de)
FR (1) FR2638105A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715893A1 (de) * 1994-12-07 1996-06-12 Klöckner-Humboldt-Deutz Aktiengesellschaft Kreislaufmahlanlage
MD4131C1 (ro) * 2010-10-25 2012-05-31 Государственный Университет Молд0 Instalaţie pentru extragerea paladiului din catalizatorii auto uzaţi
CN103263963A (zh) * 2013-04-22 2013-08-28 薛运河 不用分散剂、湿转干法生产超细纳米干粉的方法及装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3091661B1 (fr) 2019-01-14 2020-12-18 Fives Fcb Dispositif de broyage et de séchage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH413562A (de) * 1962-12-12 1966-05-15 Polysius Gmbh Mahltrocknungsverfahren und Rohrmühle zur Durchführung des Verfahrens
DE3518543A1 (de) * 1985-05-23 1986-11-27 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und einrichtung zur zerkleinerung und mahlung sproeden mahlgutes wie zum beispiel zementklinker, erz, kohle oder dergleichen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH413562A (de) * 1962-12-12 1966-05-15 Polysius Gmbh Mahltrocknungsverfahren und Rohrmühle zur Durchführung des Verfahrens
DE3518543A1 (de) * 1985-05-23 1986-11-27 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und einrichtung zur zerkleinerung und mahlung sproeden mahlgutes wie zum beispiel zementklinker, erz, kohle oder dergleichen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715893A1 (de) * 1994-12-07 1996-06-12 Klöckner-Humboldt-Deutz Aktiengesellschaft Kreislaufmahlanlage
MD4131C1 (ro) * 2010-10-25 2012-05-31 Государственный Университет Молд0 Instalaţie pentru extragerea paladiului din catalizatorii auto uzaţi
CN103263963A (zh) * 2013-04-22 2013-08-28 薛运河 不用分散剂、湿转干法生产超细纳米干粉的方法及装置
CN103263963B (zh) * 2013-04-22 2015-07-01 薛运河 不用分散剂、湿转干法生产超细纳米干粉的方法及装置

Also Published As

Publication number Publication date
FR2638105A1 (fr) 1990-04-27

Similar Documents

Publication Publication Date Title
TWI485004B (zh) 不鏽鋼爐渣及煉鋼爐渣之金屬回收的準備方法
US5505389A (en) Closed circuit grinding system
CN107250078B (zh) 一种回收钢铁生产步骤中产生的白渣的装置
US3289950A (en) Method of and apparatus for grinding moist material
CA2100490A1 (en) Process for crushing raw lignite
EP0366516A1 (de) Verfahren zum Trocknen und Mahlen von feuchten Mineralien und Anlage zur Durchführung dieses Verfahrens
FR2608171A1 (fr) Granule pour la fabrication de composites a matrice metallique et procede de preparation du granule
EP0888192B1 (de) Verfahren und anlage für die gleichzeitige und kontinuierliche herstellung mehrerer granulatfraktionen eines mineralischen materials
FR2610540A1 (fr) Procede de broyage de matieres minerales quelconques et installation pour la mise en oeuvre de ce procede
FR2908673A1 (fr) Appareil de selection granulometrique et/ou de sechage de matiere.
JP3216677B2 (ja) 粉砕設備
FR2670135A1 (fr) Procede de broyage de matieres cassantes comportant pour la mise en óoeuvre du procede une desagglomeration selective et installation.
JPH0226543B2 (de)
KR100907007B1 (ko) 건식 분쇄기 및 이를 이용한 건식 분쇄 장치
EP0094307B1 (de) Strahlmühlen
EP1213114A2 (de) Verfahren zur herstellung von polymermaterialien wie kautschuk und vorrichtung zur durchführung dieses verfahrens
JPH08299836A (ja) 流動層式分級機及びそれを備えた粉砕設備
CN207874641U (zh) 一种水冷型塑料磨粉设备
EP2809446A1 (de) Verfahren zur feinmahlung eines rohstoffs aus einem kohlenstoffhaltigen material, anlage zur kontinuierlichen biomassenverarbeitung und zugehörige gasifizierungsanwendung
CN216936377U (zh) 一种人造石墨超细粉碎生产线
CN212524436U (zh) 低温升式磨粉机
US203930A (en) Improvement in grinding-mills
FR2704308A1 (fr) Installation de séchage de produits en vrac humides.
JP3216678B2 (ja) 粉砕設備
US580909A (en) And george

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB GR IT LI NL SE

17P Request for examination filed

Effective date: 19900802

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: F C B

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920501