Large-scale aluminium electrolysis pre-baking tank

Abstract

The large aluminum electrolyzing pre-roasting tank includes anode carbon block combination, anode bus, breaking and feeding unit, anode elevating mechanism, crossbeam and portal upright, tank sealing air exhaust system, tank casing, cathode structure and bottom heat insulating structure. It features the double anode structure comprising two anode carbon blocks assembled through aluminum rod and steel pawl; the elevator installed below the top surface of the crossbeam; the tank sealing air exhaust system set inside the crossbeam; and the cathode with surround casing, carbon block with bottom composite heat insulating layer, side silicon nitride to combine silicon carbide blocks and surrounding cast material. The present invention has improved structure resulting in raised fume collecting efficiency, reasonable gas flow distribution and smooth aluminum electrolyzing process.

Description

technical field [0001] The invention belongs to the technical field of the structure of an electrolytic cell, which is the core equipment for the electrolytic production of metal aluminum by molten liquid electrolysis, and specifically relates to a new large-scale prebaked aluminum electrolytic cell. Background technique [0002] The existing prebaked electrolyzer is roughly composed of superstructure and cathode structure. [0003] The upper structure is composed of anode carbon block group, anode busbar, shelling and feeding device, anode lifting mechanism, girder, door-shaped column and slot airtight exhaust system, etc. The main structure is the door-shaped column solid web beam support structure. The solid web beam on the upper part of the electrolytic cell is supported by square columns processed by four square steel pipes, and the steel columns are hinged with the tank shell; the solid web beam is a steel plate welded component, and the section is I-shaped steel, whic...

AI Technical Summary

Problems solved by technology

The hoists are all installed above the solid web beams, and the entire upper structure has too many exposed mounting parts, which looks very messy, and the special equipment is not specially designed, which is not conducive to inspection and maintenance

[0008] (2) The airtight design of the electrolytic cell is single, and there are many problems

[0009] The gas collection structure design of the electrolytic cell adopts the same form from the small pre-baked tank to the large pre-baked tank. The flue layout is unscientific, the cover plate design is unreasonable, and there are also problems of poor integrity, excessive air leakage area, and unbalanced negative pressure. , large pressure loss

[0010] (3) The cathode shell of the electrolytic cell has poor heat dissipation, and the life of the cell lining is short

[0011] The cathode design of the electrolytic cell is currently in the same form in various domestic companies, but the heat distribution of the cathode structure of the cell is generally unreasonable. For large-scale aluminum electrolytic prebaking cells, it is difficult to form part of the furnace side in the cell; at the same time, it affects Service life of the tank cathode

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