FR2984924A1 - Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint - Google Patents

Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint Download PDF

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Publication number
FR2984924A1
FR2984924A1 FR1104032A FR1104032A FR2984924A1 FR 2984924 A1 FR2984924 A1 FR 2984924A1 FR 1104032 A FR1104032 A FR 1104032A FR 1104032 A FR1104032 A FR 1104032A FR 2984924 A1 FR2984924 A1 FR 2984924A1
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FR
France
Prior art keywords
frame
upper joint
bakelite plate
tank
insulating layer
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Withdrawn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
FR1104032A
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French (fr)
Inventor
Christian Yves Dubuis
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR1104032A priority Critical patent/FR2984924A1/en
Publication of FR2984924A1 publication Critical patent/FR2984924A1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/22—Collecting emitted gases

Abstract

The cap comprises an upper joint (3) including an insulating layer electrically and/or magnetically arranged on an entire interior surface contacting with a frame. The layer is a bakelite plate fixed at a surface of the upper joint via openings crossed by a rivet type fixing unit. The openings contacting with a side face of the frame are milled so that an upper part of rivets (6) are not in contact with the frame.

Description

L'invention concerne un dispositif de capot pour des cuves notamment de type AP30 de production d'aluminium par électrolyse. La présente innovation concerne un dispositif pour supprimer l'amorçage du capot sur une cuve. La tension d'une cuve est de 4,2 V en moyenne en fonction normal. Lors d'un effet d'anode (manque d'alumine dans la cuve) la tension peut atteindre 99,99V. Les capots en contact avec les tiges d'anodes peuvent amorcer et se souder sur celles-ci. De ce fait, lors des mouvements de cadre, les capots peuvent se plier à la base ce qui les détériore. The invention relates to a hood device for tanks including type AP30 aluminum production by electrolysis. The present invention relates to a device for suppressing the priming of the hood on a tank. The voltage of a tank is 4.2 V on average in normal function. During an anode effect (lack of alumina in the tank) the voltage can reach 99.99V. Hoods in contact with the anode rods can prime and weld on them. As a result, during frame movements, the hoods can bend at the base which deteriorates them.

L'étanchéité n'est plus efficace car pour avoir une bonne aspiration de gaz il faut avoir une fermeture efficace des capots. Chaque année énormément de capots sont dégradés. L'extrémité supérieure des bords latéraux du panneau se plient. Cette déformation est systématiquement associée à l'écrasement du joint supérieur. L'extrémité inférieure des bords latéraux se plient également. Le joint inférieur ne se déforme pas ou très peu. Par contre les fixations du joint inférieur assurées par des rivets cèdent ce qui entraîne un décollement de celui ci. Dans les cas extrêmes, le décollement du joint inférieur aboutit à une perte de celui-ci, ce qui entraîne une diminution de la longueur totale du capot, ce qui provoque la chute du capot dans la cuve. Il faut savoir qu'une cuve possède jusqu'à une quarantaine de capots. Actuellement la durée de vie d'un capot est très courte et dangereuse pour la sécurité du personnel, car la manipulation des capots est un travail au quotidien. The seal is no longer effective because to have a good gas suction must have an effective closure hoods. Every year a lot of hoods are degraded. The upper end of the side edges of the panel bend. This deformation is systematically associated with the crushing of the upper seal. The lower end of the side edges also bend. The bottom seal does not deform or very little. By against the fasteners of the lower seal provided by rivets yield which leads to a detachment of it. In extreme cases, the detachment of the lower seal results in a loss thereof, resulting in a reduction in the overall length of the hood, which causes the hood to fall into the tank. You should know that a tank has up to forty hoods. Currently the life of a hood is very short and dangerous for the safety of staff, because the handling of covers is a daily job.

Le dispositif selon l'invention vise à remédier à ces inconvénients. L'invention concerne un dispositif pour éviter les dégradations électriques et/ou magnétiques et/ou mécaniques des capots dues aux mouvements mécaniques des cadres et des champs électriques et/ou magnétiques. Il permet d'isoler électriquement et/ou magnétiquement les capots en limitant le frottement contre les tiges d'anodes en fixant côté intérieur une plaque de bakélite sur le joint supérieur du capot à l'aide de rivets, ce qui améliore de manière inattendue jusqu'alors, la durée de vie des capots. L'invention concerne un capot recouvrant un cadre d'une cuve de production d'aluminium par électrolyse caractérisé en ce que le joint supérieur du capot comprend une couche rapportée isolante électriquement et/ou magnétiquement sur la totalité de sa surface intérieure de contact avec le cadre. 40 Selon des modes de réalisation particuliers: - la couche rapportée est une plaque de Bakélite. 45 - la plaque de Bakélite est fixée à la surface du joint supérieur via des orifices (7) traversés par des moyens de fixation de type rivet - les orifices (7) côté face de contact avec le cadre sont fraisés afin que la partie supérieure des rivets ne soient pas en contact avec le cadre. 35 50 La fixation de la plaque de bakélite est sur le joint supérieur du capot. The device according to the invention aims to remedy these disadvantages. The invention relates to a device for preventing electrical and / or magnetic and / or mechanical damage to the covers due to the mechanical movements of the frames and the electric and / or magnetic fields. It allows to electrically and / or magnetically isolate the covers by limiting the friction against the anode rods by fixing a bakelite plate on the upper seal of the bonnet with rivets, which improves in an unexpected manner. 'then, the life of the hoods. The invention relates to a cover covering a frame of an electrolytic aluminum production vessel, characterized in that the upper seal of the cover comprises an insulating layer that is electrically and / or magnetically insulating on the whole of its inner contact surface. frame. According to particular embodiments: the reported layer is a Bakelite plate. 45 - the Bakelite plate is fixed to the surface of the upper seal via orifices (7) traversed by fastening means of the rivet type - the orifices (7) on the face-contact side with the frame are milled so that the upper part of the rivets are not in contact with the frame. 35 50 The bakelite plate is attached to the top bonnet gasket.

Le capot est en aluminium donc conducteur électriquement. Les dessins en annexe illustrent un capot avec et sans la plaque de bakélite. La figure 1 représente un capot en 4 parties à savoir : - un panneau embouti (2) de 2mm d'épaisseur - un joint aluminium supérieur (3) - un joint aluminium inférieur (4) - deux poignées isolantes en fibre perpendiculaires (5) La figure 2 représente l'invention avec une fixation d'une plaque de bakélite (1) sur le joint supérieur (3) avec 8 rivets (6) de 4mm. Cette plaque doit être percée à 4mm et fraisée à 6mm (7). La plaque de bakélite (1) a des dimensions notamment de 670 mm x 125 mm et de 5mm d'épaisseur sur le joint supérieur du capot (2). The hood is aluminum so electrically conductive. The drawings in the appendix illustrate a hood with and without the bakelite plate. FIG. 1 represents a 4-part cover, namely: a stamped panel (2) 2mm thick - an upper aluminum seal (3) - a lower aluminum seal (4) - two perpendicular fiber insulating handles (5) Figure 2 shows the invention with a fixation of a Bakelite plate (1) on the upper seal (3) with 8 rivets (6) of 4mm. This plate must be drilled to 4mm and milled to 6mm (7). The bakelite plate (1) has dimensions in particular of 670 mm x 125 mm and 5 mm thick on the upper seal of the cover (2).

Cette plaque doit être percée de trous à 4mm et fraisée à 6mm (3) et fixée par 8 rivets sur le joint supérieur du capot. Le fraisage permet que le rivet ne soit pas en contact électrique ; thermique, magnétique, mécanique direct avec la cuve.25 This plate must be drilled with 4mm holes and milled to 6mm (3) and fastened by 8 rivets on the upper seal of the cover. Milling allows the rivet to not be in electrical contact; thermal, magnetic, mechanical direct with the tank.

Claims (4)

REVENDICATIONS1) Capot recouvrant un cadre d'une cuve de production d'aluminium par électrolyse caractérisé en ce que le joint supérieur du capot comprend une couche rapportée isolante électriquement et/ou magnétiquement sur la totalité de sa surface intérieure de contact avec le cadre. CLAIMS1) Cover covering a frame of an aluminum production cell by electrolysis, characterized in that the upper seal of the cover comprises an insulating layer that is electrically and / or magnetically insulating over its entire inner surface of contact with the frame. 2) Capot selon la revendication 1 caractérisé en ce que la couche rapportée est une plaque de Bakélite. 2) Hood according to claim 1 characterized in that the reported layer is a Bakelite plate. 3) Capot selon la revendication 2 caractérisé en ce que la plaque de Bakélite est fixée à la surface du joint supérieur via des orifices (7) traversés par des moyens de fixation de type rivet 3) Hood according to claim 2 characterized in that the Bakelite plate is fixed to the surface of the upper seal via orifices (7) traversed by rivet type fixing means 4) Capot selon la revendication 3 caractérisé en ce que les orifices (7) côté face de contact avec le cadre sont fraisés afin que la partie supérieure des rivets ne soient pas en contact avec le cadre.20 4) Cover according to claim 3 characterized in that the orifices (7) on the side of contact with the frame are milled so that the upper part of the rivets are not in contact with the frame.
FR1104032A 2011-12-22 2011-12-22 Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint Withdrawn FR2984924A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1104032A FR2984924A1 (en) 2011-12-22 2011-12-22 Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1104032A FR2984924A1 (en) 2011-12-22 2011-12-22 Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint

Publications (1)

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FR2984924A1 true FR2984924A1 (en) 2013-06-28

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Family Applications (1)

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FR1104032A Withdrawn FR2984924A1 (en) 2011-12-22 2011-12-22 Cap, useful for covering frame of tank for producing aluminum, comprises upper joint including insulating layer arranged on entire interior surface contacting with frame, where layer is bakelite plate fixed at surface of upper joint

Country Status (1)

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FR (1) FR2984924A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948749A (en) * 1975-04-02 1976-04-06 Copperloy Corporation Aluminum potline shield
GB2013720A (en) * 1978-02-07 1979-08-15 Alusuisse Absorption of magnetic field lines in electrolytic reduction cells
US4218300A (en) * 1978-08-24 1980-08-19 Swiss Aluminium Ltd. Covering for a cell for fused salt electrolysis
US4406767A (en) * 1981-05-20 1983-09-27 Swiss Aluminium Ltd. Anode hooding system for a fused salt electrolytic cell
US4436607A (en) * 1981-07-14 1984-03-13 Swiss Aluminium Ltd. Anode superstructure of a fused salt electrolytic cell and pot room fitted out with same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948749A (en) * 1975-04-02 1976-04-06 Copperloy Corporation Aluminum potline shield
GB2013720A (en) * 1978-02-07 1979-08-15 Alusuisse Absorption of magnetic field lines in electrolytic reduction cells
US4218300A (en) * 1978-08-24 1980-08-19 Swiss Aluminium Ltd. Covering for a cell for fused salt electrolysis
US4406767A (en) * 1981-05-20 1983-09-27 Swiss Aluminium Ltd. Anode hooding system for a fused salt electrolytic cell
US4436607A (en) * 1981-07-14 1984-03-13 Swiss Aluminium Ltd. Anode superstructure of a fused salt electrolytic cell and pot room fitted out with same

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