SU1236000A1 - Method of hot recovering of electrolyzer lining - Google Patents

Description

The invention relates to the field of non-ferrous metallurgy, in particular to equipment for the electrolytic production of aluminum.

The aim of the invention is to increase the service life of the electrolyzer, to ensure the reusability of the housing, to improve the quality of the metal produced.

The essence of the proposed invention is that in the electrolyzer, including the anode device, the cathode with a metal detachable casing having longitudinal and end beams, the ends of these beams are connected to the lock with the possibility of mutual movement, while the ends of the beams have a fork-shaped and T-shaped and are provided with a roller with brackets with holes in which elastic elements are installed, for example spring-loaded bolts pivotally connected to the adjacent beam.

Making an elastic lock connecting the casing beams avoids plastic bending and destroying them in the corners of the casing, which lengthens the electrolyzer life, reduces the cost of maintenance, reduces the quality of the aluminum.

FIG. 1 shows the electrolysis cell, general view; in fig. 2 is a view A of FIG. 1 (connection node of end and longitudinal beams); in fig. 3 is a view of B in FIG. 2 (butt joint and longitudinal beams); in fig. 4 - ends of face and longitudinal beams, axonometrics.

The device consists of a metal cathode casing, including the bottom 1, lined with coal blocks 2 and refractory bricks 3, heat insulating backfill 4, power supply blooms 5, bolts 6 J nuts 7, packages of belleville springs 8, extension 9 and face 10 brackets eleven.

The longitudinal 9 and end 10 beams are fixed to the bottom 1 by bolts 6 by means of nuts 7 through packages of cup springs 8. The ends of the ends and the longitudinal beams are made in the form of forks and T-shaped, forming

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movable locks. The bolts 6 are hinged at the ends of the respective boots and pass through special brackets 11 welded to the longitudinal and end beams. Between the brackets 11 and the nuts 7 of the bolts are installed packages of cup springs 8 ..

During operation of the device, when expanding the lining, the force from it is transmitted to the beams, which move, compress the springs. The magnitude of the mutual displacement of the end brackets and the longitudinal beams is provided by gaps in the internal locks of the permissible amount of compression of the springs and hinged fastening of the clamping bolts

Elastic casing of the longitudinal and end beams of the cathode casing makes it possible to lengthen the service life of the electrolyzers (by 20%). The flexible connection of the cathode casing block will reduce repair costs by 40%, since disassembling the worn casing can be done in blocks. labor-intensive and improved by the technology-iHocTb elements of casing manufacturing.

According to the time of reference: to the discovery with the known electrolyzer, due to the psoy / coke / dinenck beams, it has a long service life 5 since bending of the beams and the uneven pressure of the liner on the cathode casing are prevented. As the temperature changes in parts of the liner, the temperature expansions are also compensated. Since the casing beams are not plastically i.e. it creates the possibility of their reuse during capital repairs, which will lead to savings of 16-20 tons of metal on each electrolyzer. A malleable casing design will reduce the possibility of aluminum leaks to the metal structure and current lead bores J, which will reduce the iron content in the emitted aluminum and thereby improve its quality. By increasing the resistance of the cathode, the content of iron in aluminum will decrease by L - by 20% compared to the known.

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Sriga

Editor L.Gratshsho

Compiled by N. Black

Tehred L. Serdyukova Proofreader E. Sirohman

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Order 3067/28 Circulation 615

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, ssh. Project, 4

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Claims (2)

1. ELECTROLYZER FOR PRODUCING ALUMINUM, including an anode device, a cathode with a metal detachable casing made with longitudinal and end beams, characterized in that, for the purpose of holes, into which elastic elements are mounted pivotally connected to the beams. 2. The cell according to π. 1, characterized in that the elastic elements are made in the form of spring-loaded bolts.