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Method for randomly large scale repair and welding electrolytic bath under no cut-off condition of aluminium electrolytic series

A technology of electrolytic cell and aluminum electrolysis, which is applied in the field of overhaul welding of any electrolytic cell, can solve the problem that local cathode steel rod heads cannot be welded, and achieves the effects of easy operation, wide application value, and simple method

Inactive Publication Date: 2008-07-23
HENAN ZHONGFU IND
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the known technology, and to provide a method capable of changing the local magnetic field strength of the electrolytic cell to realize live welding of the cathode steel bar head of the aluminum electrolytic cell under the condition that the large-scale aluminum electrolytic cell is not powered off, so as to solve the problem of local The technical problem that the cathode steel bar head cannot be welded

Method used

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  • Method for randomly large scale repair and welding electrolytic bath under no cut-off condition of aluminium electrolytic series
  • Method for randomly large scale repair and welding electrolytic bath under no cut-off condition of aluminium electrolytic series

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Embodiment

[0012] Embodiment: Referring to Figures 1 and 2, after the electrolytic cell 8 is powered off, the anode column 1 and the short-circuit block 2 are in a short-circuit state, and the anode column 6 and the short-circuit block 7 of the next electrolytic cell are in an open state. Use a magnet to measure the magnetic field and direction at the cathode steel bar head 4 that cannot be welded, find out the cathode bus bar 3 or the bottom bus bar 5 that affects the magnetic field, then disconnect the bus bar to connect the short circuit block 2 that is in a short circuit state, and insert the insulation board And fix the short circuit block 2, insulating plate and anode column 1, to cut off or reduce the current flowing through the bus 3 or the bus 5 at the bottom of the tank. The steel rod head is welded, and after welding, the insulating plate is drawn out, the short circuit block 2 and the anode column 1 are fixed, and the welding of the next cathode steel rod head is carried out.

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Abstract

The large scale repairing and welding method of cathode steel rod in electrolytic bath includes: stopping operation of the electrolytic bath, detecting the magnetic field strength and direction incapable of welding the cathode steel rod with magnetic field strength detecting instrument and compass, finding out the cathode bus of the electrolytic bath to affect the magnetic field, cutting off the upright shortening block connected to the bus, inserting insulating plate, fixing the shortening block, the insulating plate and the anode upright to cut off or reduce the current flowing through the bus, and welding the cathode steel rod in conventional welding process. The said method can ensure the welding quality.

Description

1. Technical field: [0001] The invention relates to a welding method for the cathode steel bar head of an electrolytic cell, in particular to a method for overhauling and welding any electrolytic cell of an aluminum electrolytic series without power failure. 2. Technical background [0002] When an electrolytic cell in the aluminum electrolysis production series is overhauled, it is necessary to weld the cathode steel rod of the electrolytic cell to the external cathode bus explosive head. Due to the large current in the electrolytic production series, the generated magnetic field is also large, resulting in welding difficulties or individual welding failures. This problem generally exists in aluminum electrolytic cells with large capacity. Many technicians have experimented with many methods to try to solve this problem, such as forced welding in a strong magnetic field through a special process, but this method cannot meet the quality requirements of welding, resulting in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/08
Inventor 梁学民王有山王殿勇
Owner HENAN ZHONGFU IND
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