EP1789363B1 - Procede de traitement d'un siccatif au carbone pour produire des electrodes - Google Patents

Procede de traitement d'un siccatif au carbone pour produire des electrodes Download PDF

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Publication number
EP1789363B1
EP1789363B1 EP04764756A EP04764756A EP1789363B1 EP 1789363 B1 EP1789363 B1 EP 1789363B1 EP 04764756 A EP04764756 A EP 04764756A EP 04764756 A EP04764756 A EP 04764756A EP 1789363 B1 EP1789363 B1 EP 1789363B1
Authority
EP
European Patent Office
Prior art keywords
mill
sifter
adjusted
grinding
dust
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.)
Revoked
Application number
EP04764756A
Other languages
German (de)
English (en)
Other versions
EP1789363A1 (fr
Inventor
Jens-Peter Thiel
Thore MÖLLER
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.)
Claudius Peters Projects GmbH
Original Assignee
Claudius Peters Technologies GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34958497&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1789363(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Claudius Peters Technologies GmbH filed Critical Claudius Peters Technologies GmbH
Publication of EP1789363A1 publication Critical patent/EP1789363A1/fr
Application granted granted Critical
Publication of EP1789363B1 publication Critical patent/EP1789363B1/fr
Anticipated expiration legal-status Critical
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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • 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
    • 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
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • Electrodes which are mainly used for electro-metallurgical processes, are produced by pressing granular carbon masses (dry matter) with the addition of pitch as binder.
  • the electrode quality depends crucially on the fact that a predetermined particle size spectrum is maintained in the dry matter.
  • Coarse grain, medium grain and fine grain must be present in certain proportions depending on the type of electrode and the raw material. Of particular importance is the adherence to a given quality of the fine material.
  • the mean grain size is usually at 30 to 60 microns corresponding to a specific surface of 5000 to 2000 cm 2 / g.
  • the invention is therefore based on the object to provide a method which is easier to influence with regard to the achievement of certain properties of the dust-like or fine-grained target fraction.
  • the solution according to the invention consists in that, for grinding the dust fraction, use is made of a mill-classifier combination with grain size which can be continuously adjusted during operation.
  • a roller mill with integrated classifier in which the grinding pressure and preferably the mill speed and the air throughput through the mill and the classifier are adjustable, has proven particularly useful.
  • a dynamic classifier is preferably used, in which for the purpose of adjusting the grain boundaries, the speed should be adjustable.
  • a mill-sifter combination is understood to mean such a functional connection of a mill with a sifter in which the oversized grain separated from the sifter is returned to the mill.
  • This combination allows a particularly fine setting without significant dead-mark, because both the properties of the classifier and those of the mill can be influenced. This achieves the continuous production of predetermined amounts of dust of arbitrary fineness with different grindability by adjusting the speed, the contact pressure, the system air quantity and / or the classifier speed.
  • the grinding pressure can be adjusted. Since petroleum coke, which is mostly used as a raw material, is unusually hard, the grinding pressure is set two to three times as high as conventional coal grinding.
  • the amount of system air that is, the amount of air flow that carries the refined fines from the refining zone to the sifter, can be reduced if lower maximum grain size is desired, and vice versa.
  • the maximum grain size can also be influenced by the speed of the dynamic classifier. Depending on the type of classifier, further parameters may be added to influence the grain size.
  • the sifter is preferably a known dynamic type in which the air flow of the mill loaded with milled material is guided from the outside to the inside through a ring of tangentially arranged guide vanes and is thereby set in circular motion. Farther inside, it reaches a rotating basket on a spiral track, which is operated at an adjustable speed. The fine particles penetrate the columns of the rotary basket with the air flow, while the coarser are thrown back outward to sink in the space between the guide vanes and rotating basket down and then fed back to the grinding process. The fines leave the sifter with the air flow, whereby its fineness can be determined by the setting of the rotary basket speed and the strength of the air flow.
  • the fines thus obtained and continuously removed from the air flow in a known manner no longer require any subsequent homogenization. It can be continuously fed directly to a silo, from which it is taken directly or indirectly, preferably continuously for use.
  • This silo can also be dimensioned smaller than previously customary, because no mill changeover takes into account quality change Need to become. Even if parameters of the grinding or visual process have to be adjusted due to quality changes of the raw material or changes in the recipe, the mill-sifter combination can be continuously operated. If a fundamental recipe change is necessary, the conversion can be done in a few minutes.
  • the product which may be obtained in the conversion phase and does not correspond to the target quality can temporarily be intermediate-silicated and subsequently returned to the mill.
  • the continuous operation is thereby practically not interrupted.
  • the switching process is preferably computer-controlled, with programmed overrides being used to avoid or minimize the accumulation of intermediate product (Abmahlmann).
  • the approximately as Abmahlmann resulting product is collected in an intermediate silo and the feedstock preferably computer-controlled mixed so that no polluting product waste.
  • roller mills ball ring mills, roller table mills, roller mills and single-roller mills
  • All grindable carbon carriers up to the hardest petroleum cokes can be processed.
  • the driers can be prepared for all types of electrodes with different hardness and fineness requirements.
  • the bandwidth of the producible grains is very large. It is preferably in the range of 1,000 to 10,000 cm 2 / g.
  • the essential advantage of the invention is that the grinding process can be switched on continuously and at the same time in the production process. Since the ensiling is partly avoided, partly facilitated and in particular large silos are avoided, the hitherto often extremely disturbing problem of segregation of different grain within the silos is avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)

Claims (8)

  1. Procédé de préparation d'un siccatif au carbone pour la production d'électrodes, dans lequel des fractions de granulométries différentes sont produites et mélangées dans un rapport prédéterminé et dans lequel les fractions comptent parmi elles une fraction, allant de poussière à granulométrie fine, qui est moulue à une granulométrie prédéterminée réglable, caractérisé en ce qu'une combinaison moulin-tamis à granulométrie réglable en continu pendant le fonctionnement est utilisée pour moudre la fraction allant de poussière à granulométrie fine.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un moulin à cylindres avec un tamis intégré est utilisé comme combinaison moulin-tamis.
  3. Procédé selon la revendication 2, caractérisé en ce que la pression de mouture du moulin est modifiée.
  4. Procédé selon la revendication 2, caractérisé en ce que la vitesse de rotation de l'entraînement du moulin est modifiée.
  5. Procédé selon la revendication 2, caractérisé en ce que le débit d'air du moulin et du tamis est modifié.
  6. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'un tamis dynamique est utilisé.
  7. Procédé selon la revendication 6, caractérisé en ce que la vitesse de rotation du tamis est modifiée.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la combinaison moulin-tamis est adaptée, au cours du fonctionnement continu, à certaines variations de qualité du matériau brut ou à des changements de formulation.
EP04764756A 2004-09-02 2004-09-02 Procede de traitement d'un siccatif au carbone pour produire des electrodes Revoked EP1789363B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/009798 WO2006024315A1 (fr) 2004-09-02 2004-09-02 Procede de traitement d'un siccatif au carbone pour produire des electrodes

Publications (2)

Publication Number Publication Date
EP1789363A1 EP1789363A1 (fr) 2007-05-30
EP1789363B1 true EP1789363B1 (fr) 2009-02-11

Family

ID=34958497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764756A Revoked EP1789363B1 (fr) 2004-09-02 2004-09-02 Procede de traitement d'un siccatif au carbone pour produire des electrodes

Country Status (6)

Country Link
US (1) US8052077B2 (fr)
EP (1) EP1789363B1 (fr)
JP (1) JP4857271B2 (fr)
CN (1) CN100548876C (fr)
DE (1) DE502004008991D1 (fr)
WO (1) WO2006024315A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101450333B (zh) * 2007-11-29 2011-02-02 沈阳铝镁设计研究院 一种碳质原料破碎筛分方法及系统
US10016762B2 (en) * 2015-06-16 2018-07-10 Arvos Raymond Bartlett Snow Llc Vertical bowl mill for producing coarse ground particles
CN113372119B (zh) * 2020-04-28 2022-12-30 吉林炭素有限公司 一种石墨电极本体配方中干料粒级组成的设计方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807691B1 (de) * 1978-02-23 1979-04-26 Babcock Krauss Maffei Ind Verfahren und Vorrichtung zur Regelung der Feinheit von Fertiggut aus einer Mahlanlage
JPS6150678A (ja) * 1984-08-18 1986-03-12 川崎重工業株式会社 分級器
DE8425837U1 (de) * 1984-08-31 1984-11-22 Krupp Polysius Ag, 4720 Beckum Wälzmühle
GB2176134A (en) * 1985-06-03 1986-12-17 Smidth & Co As F L Separator for sorting particulate material
US4798342A (en) * 1988-01-11 1989-01-17 Williams Patent Crusher And Pulverizer Company Fuel processing system for control of nitrous oxide emissions
JPH06102161B2 (ja) * 1988-11-18 1994-12-14 宇部興産株式会社 堅型粉砕機の運転方法
US4981269A (en) * 1988-11-18 1991-01-01 Ube Industries, Ltd. Vertical mill
DE4022062C1 (en) 1990-07-11 1991-11-14 Thyssen Stahl Ag, 4100 Duisburg, De Strip guide for butt welding along edge - uses sensors along length for control changing axial position of deflection rollers
DE4122062C2 (de) * 1991-07-03 1995-04-06 R & D Carbon Ltd Verfahren zur Aufbereitung eines Trockenstoffes zur Herstellung von Elektroden
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
US5330110A (en) * 1993-07-12 1994-07-19 Williams Robert M Apparatus for grinding material to a fineness grade
JPH1121116A (ja) * 1997-06-30 1999-01-26 Nippon Steel Corp 窒化ホウ素で被覆された炭素質粉末および炭素質繊維
JP3635044B2 (ja) * 2001-06-08 2005-03-30 三井鉱山株式会社 リチウム二次電池用負極材料、その製造方法、及びリチウム二次電池
US6966508B2 (en) * 2002-12-26 2005-11-22 Edward Kenneth Levy On-line control of coal flow

Also Published As

Publication number Publication date
US8052077B2 (en) 2011-11-08
CN100548876C (zh) 2009-10-14
JP4857271B2 (ja) 2012-01-18
CN101010258A (zh) 2007-08-01
WO2006024315A1 (fr) 2006-03-09
US20070284463A1 (en) 2007-12-13
EP1789363A1 (fr) 2007-05-30
DE502004008991D1 (de) 2009-03-26
JP2008511525A (ja) 2008-04-17

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