EP0627606B1 - Dispositif de préchauffage - Google Patents

Dispositif de préchauffage Download PDF

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Publication number
EP0627606B1
EP0627606B1 EP94106297A EP94106297A EP0627606B1 EP 0627606 B1 EP0627606 B1 EP 0627606B1 EP 94106297 A EP94106297 A EP 94106297A EP 94106297 A EP94106297 A EP 94106297A EP 0627606 B1 EP0627606 B1 EP 0627606B1
Authority
EP
European Patent Office
Prior art keywords
core
silo housing
electrodes
concentric
silo
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
EP94106297A
Other languages
German (de)
English (en)
Other versions
EP0627606A2 (fr
EP0627606A3 (fr
Inventor
Werner Fischer
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.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich GmbH and Co KG
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 Maschinenfabrik Gustav Eirich GmbH and Co KG filed Critical Maschinenfabrik Gustav Eirich GmbH and Co KG
Publication of EP0627606A2 publication Critical patent/EP0627606A2/fr
Publication of EP0627606A3 publication Critical patent/EP0627606A3/fr
Application granted granted Critical
Publication of EP0627606B1 publication Critical patent/EP0627606B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0008—Resistor heating

Definitions

  • the invention relates to a device for preheating Drying agents according to the preamble of claim 1 (EP 0 355 361 A).
  • Masses for the production of electrodes (anodes, cathodes) for aluminum production by melt flow electrolysis consist of drying agents - drying agents are mixtures from petroleum coke and granularly prepared electrode residues -, unlucky as binders just before shaping is added. Masses of this composition will also be called green masses from which the electrodes are formed and then burned.
  • binders For adding binders is to heat up the dry matter in this regard is spoken of preheating, what in so-called preheaters happens in the evening about dosing car dryers conveyed, the material to be conveyed is heated in the preheater, and from which, on the other hand, heated dry matter towards be supplied by mixers.
  • a preheater there are heating screws, Heating silos and heating drums known.
  • the invention has the subject of a heating silo.
  • a heating silo is known - in technical terms they are known as Batch preheater called -, in the dry matter through electric resistance heating is preheated.
  • Batch preheater Internally of the preheater are several electrodes arranged one above the other - Preheater walls completely isolated - for Introduction and discharge of the dry matter flowing through and thus heating current (direct or alternating current) intended.
  • the well-known, polygonal device in plan is characterized by an inhomogeneous mass flow, and uneven heating up to graphitization not discharged mass on the electrodes and burn out of isolation.
  • the task is set a preheater of the type mentioned above create dry matter through a homogeneous mass flow is heated evenly and preheater so to arrange for repairs to be carried out as quickly as possible Standstill certificates of the entire facility for green masses possible are.
  • the task is mediated of the features of claim 1 solved.
  • Fig. 1 shows schematically two preheaters 10, 11 on a frame 12 are arranged.
  • the preheater 10 is below a continuously operating scale 13 and above a continuously operating mixer 14 is arranged.
  • the preheater 10 is via filling pipes 19 and 20 and the mixer 14 is fed from the scale 13.
  • Fig. 1 is the preheater 10 via electrodes 16, 17 and connection cable 18 connected to a rectifier 15.
  • Preheater 10 and 11 are arranged on a horizontal frame 12, that is rotatable about a vertical axis of rotation 19 by 360% is trained.
  • the rectifier 15 can be suspended (Loosen the connection cable 18), the frame 12 rotated by 180%, so that the preheater 11 under the scale 13 and above the mixer 14 driven, and the connecting cable 18 again with the electrodes 16, 17 (parts of the same type and function are identified by the same reference numerals) and preheater 11 are put into operation.
  • this Possibility of retracting a replacement preheater (either 10 or 11)
  • business interruptions can occur at a time Minimum dimensions are pressed.
  • FIG. 2 shows preheaters 10 designed according to the invention (in operation) and 11 (in operation).
  • the preheaters 10 and 11 are identical, so that the Description limited to that of the preheater 10.
  • the preheater 10 consists of a round Hollow body 22, hereinafter also called silo housing 22, that Rings 23 arranged concentrically one above the other (in the illustrated Case six rings 23) is formed.
  • the concentricity is ensured by the face arranged steps 24, 25 that fit into each other, the Center rings 23 to each other so that one is stepless round inner surface 26 and outer surface 27 of the silo housing 22 arises.
  • the rings 23 forming the silo housing 22 exist from a heat-resistant, in electrically non-conductive ceramic material, for example a heat-resistant (Under heat resistance should be resistance up to 500 ° C be understood) concrete.
  • the one made of ceramic material Silo housing 22 is surrounded concentrically at a distance from a metallic jacket tube 28 that is equidistant on all sides held on supports 29 to the silo housing 22 is.
  • the so between silo housing 22 and metallic Casing tube 28 adjusting air space 30 also serves for insulation purposes.
  • the silo housing 22 At the top, i.e. towards the scale 13 are the silo housing 22, the air space 30 and the jacket tube 28 through a removable cover 31 closed, the one in the middle Opening 32 for passing on the filling tube 19 emerging dry goods in the silo housing 22.
  • the core 34 Concentric within the silo housing 22 and rectified there is a round core 31.
  • the core 34 consists of rings 35 which are arranged one on top of the other by means of a tie rod 36 and an anchor plate 36a are held together.
  • the rings 35 consist of the same ceramic material as that Rings 23 of the silo housing 22 protrude into the annular space at the top 37 on one or as in the present exemplary embodiment shown inner electrodes attached to two rings 23 41. Two radially opposite, between them the inner electrodes 34 receiving the core 41. In fact, the inner circumference is more even Division of several such internal electrodes 41 den Annular space 37 provided through to the core 34, whereby these electrodes 41 are electrically conductive, i.e.
  • a stream are conductively connected to each other.
  • the concentric and axial mounting of the Core 34 in silo housing 22 may be concentric by means of the inner electrodes 41 which axial mounting could be via a metallic ring 42 - attached to the upper end of the core 34 and by means of one Shoulder 40 resting on the inner electrodes 41, the also serve as an electrical connection of the inner electrodes could - be carried out.
  • inner electrodes 43 provided with a lower electrode 17, which is also connected to the rectifier 15 is connected, are electrically conductively connected.
  • Fig. 2 45 denotes a drive unit which with a drive shaft 46, the cover 33 Rotating removal tool train between tie plate 36a and cover 33 47 drives.
  • the removal tool 42 is made from one (in plan view, not shown) star of several circularly curved arms 48 that remove dry matter and the removal in the eccentrically opening into the cover 33 Promote filling tube 20.
  • Dry matter is from the Scale 13 coming through opening 32 into annular space 37, favored by the distribution cone 38 evenly on the Annulus 37 distributed.
  • a dry matter column is formed in the annular space 37 externally limited in the form of a ring tube through the inner diameter of the silo housing 22 and internally through the outer diameter of the core 34.
  • the ablation tool 47 continuously removes dry matter at the bottom and conveys it through the filling pipe towards the mixer 14 so that the desiccant evenly from top to bottom wanders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Resistance Heating (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Ceramic Products (AREA)

Claims (8)

  1. Installation pour le préchauffage électrique d'une matière sèche en vue de la préparation de pâtes crues pour électrodes, l'installation comportant une enceinte en forme de silo (22) qui est circulaire et renferme un noyau central (34), des électrodes (41, 43) reliées à une source de courant (15), qui s'étendent entre l'enceinte en forme de silo (22) et le noyau central (34) à l'extrémité supérieure et à l'extrémité inférieure, et un premier conduit de remplissage (19), concentrique, à l'extrémité supérieure, caractérisée en ce qu'à l'extrémité inférieure, il est prévu un second conduit de remplissage (20) excentré, dans lequel un outil d'enlèvement rotatif (47) déverse de la matière sèche enlevée, le premier conduit de remplissage (19) et le second conduit de remplissage (20) étant disposés dans des couvercles (31 et 33).
  2. Installation selon la revendication 1, caractérisée en ce que l'enceinte en forme de silo (22) est constituée d'anneaux (23) en un matériau céramique non conducteur de l'électricité, disposés concentriquement l'un au-dessus de l'autre.
  3. Installation selon la revendication 2, caractérisée en ce que les anneaux sont maintenus en position concentrique par des surfaces en gradin (25).
  4. Installation selon l'une des revendications 1 à 3, caractérisée en ce que l'enceinte en forme de silo (22) est entourée par une enveloppe périphérique (28), en en étant maintenue à distance par l'intermédiaire d'éléments d'appui (29).
  5. Installation selon l'une des revendications 1 à 4, caractérisée en ce que les électrodes intérieures (41), situées à l'extrémité supérieure, déterminent le positionnement concentrique du noyau central (34) par rapport à l'enceinte en forme de silo (22) et un anneau métallique (42) en détermine le positionnement axial dans l'enceinte en forme de silo (22).
  6. Installation selon l'une des revendications 1 à 5, caractérisée en ce que les électrodes intérieures (41) situées à l'extrémité supérieure et les électrodes intérieures (43) situées à l'extrémité inférieure sont reliées à une source de courant, de préférence à un redresseur (15), par l'intermédiaire d'une électrode supérieure (17).
  7. Installation selon l'une des revendications 1 à 6, caractérisée en ce que le dispositif d'enlèvement (47) est constitué d'une structure en étoile ayant plusieurs bras (48) recourbés sous une forme circulaire.
  8. Installation selon la revendication 1, caractérisée en ce que deux dispositifs de préchauffage, aptes à être déplacés par rotation autour d'un axe vertical, sont prévus.
EP94106297A 1993-05-10 1994-04-22 Dispositif de préchauffage Expired - Lifetime EP0627606B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH143193 1993-05-10
CH143193 1993-05-10
CH1431/93 1993-05-10

Publications (3)

Publication Number Publication Date
EP0627606A2 EP0627606A2 (fr) 1994-12-07
EP0627606A3 EP0627606A3 (fr) 1996-02-07
EP0627606B1 true EP0627606B1 (fr) 1999-08-04

Family

ID=4210308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106297A Expired - Lifetime EP0627606B1 (fr) 1993-05-10 1994-04-22 Dispositif de préchauffage

Country Status (9)

Country Link
US (1) US5535236A (fr)
EP (1) EP0627606B1 (fr)
CN (1) CN1076469C (fr)
AU (1) AU671723B2 (fr)
CA (1) CA2122948C (fr)
DE (1) DE59408566D1 (fr)
NO (1) NO302201B1 (fr)
RU (1) RU2121639C1 (fr)
UA (1) UA27799C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9900253A (pt) 1999-02-02 2000-08-29 Companhia Brasileira Carbureto Recipiente de alumìnio e aço inoxidável a formação de eletrodos de autocozimento para a utilização em baixos-fornos elétricos de redução
BR9900252A (pt) 1999-02-02 2000-08-29 Companhia Brasileira Carbureto Recipiente de aço inoxidável para a formação de eletrodos de autocozimento para a utilização em baixos-fornos elétricos de redução
DE102008041104A1 (de) * 2008-08-07 2010-02-11 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Mischvorrichtung mit Induktionsheizung
CN101382392B (zh) * 2008-10-21 2010-06-16 鞍山市华杰建材技术开发有限公司 列管式预热器
EP2546593B1 (fr) * 2011-07-12 2015-03-04 SMS Concast Italia S.p.A. Dispositif pour le transfert de matériau métallurgique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047137A (en) * 1963-04-09 1966-11-02 Great Lakes Carbon Corp Apparatus and process for continuously making baked and/or graphitized carbon bodies,or for applying electrothermal energy to conductive compositions
DE2257483A1 (de) * 1972-11-23 1974-05-30 Sudawskij Ofen zur elektrodenherstellung
US4431503A (en) * 1981-06-22 1984-02-14 Metallurgical, Inc. Energy reduction in the manufacture of pre-baked carbon containing electrodes for electrolytic production of metals such as aluminum
ZA852705B (en) * 1984-10-18 1985-12-24 Custom Equip Corp Low temperature kiln
NO159960C (no) * 1986-07-08 1989-02-22 Norsk Hydro As Ovn for hoeytemperaturbehandling av plastiske eller forherdete produkter.
DE3824323A1 (de) * 1988-07-18 1990-01-25 Horst J Ing Grad Feist Verfahren zum grafitieren von rohlingen aus kohlenstoff zu graphitelektroden
AU643611B2 (en) * 1991-04-10 1993-11-18 Mintek Direct resistance heating electrical furnace assembly and method of operating same

Also Published As

Publication number Publication date
EP0627606A2 (fr) 1994-12-07
NO941718D0 (no) 1994-05-09
RU2121639C1 (ru) 1998-11-10
CN1076469C (zh) 2001-12-19
EP0627606A3 (fr) 1996-02-07
US5535236A (en) 1996-07-09
AU671723B2 (en) 1996-09-05
NO941718L (no) 1994-11-11
CN1112233A (zh) 1995-11-22
NO302201B1 (no) 1998-02-02
CA2122948A1 (fr) 1994-11-11
RU94015597A (ru) 1996-04-10
DE59408566D1 (de) 1999-09-09
UA27799C2 (uk) 2000-10-16
CA2122948C (fr) 1999-09-21
AU6197094A (en) 1994-11-24

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