Integrally formed anode composite covering layer of aluminum electrolytic cell and method

Abstract

The invention discloses an integrally formed anode composite covering layer structure of an aluminum electrolytic cell. On the basis that the heat insulation and anti-oxidation functions of existing covering mixtures of aluminum oxide and electrolytes are ensured, an integrally formed aluminum electrolytic anode composite covering layer which can be repeatedly used for multiple times is provided for replacing the mode of bulk covering mixture layers of electrolytes and aluminum oxide, adopted by traditional aluminum electrolysis. The upper surfaces of anodes are covered with anode anti-oxidation covering layer bodies (3), and air is isolated, so that the upper surfaces of the carbon anodes are prevented from being oxidized; heat insulating composite covering layer bodies (1) on the anodes are arranged on the anti-oxidation covering layer bodies (3) to form a covering layer set which covers all the anodes of the electrolytic cell, and the functions of heat insulation and gas collection are achieved; and heat insulating composite covering layer bodies (2) on the periphery of the electrolytic cell are arranged between the outer edges of the anodes and the inner edges of side blocks of the cell and arranged on the inner furnace wall of a cell hearth, and cover all the peripheries of the long sides and the ends.

Description

Technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and relates to a new structure, new material and thermal state repetition of an anode covering layer applied to an aluminum electrolytic cell in production and operation, as well as a new structure, a new material and a thermal state of an integrally formed composite covering layer. Use technology. Background technique [0002] In the electrochemical reaction of aluminum electrolysis, the molten electrolyte itself is not consumed by reaction, but it plays a core role as a reaction medium. Each time the firing is started, cryolite will always be added, resulting in a gradual increase in the total amount of electrolyte in the system, which has become a problem that plagues old electrolytic aluminum enterprises, with 50,000 tons of bridge power. Since the birth of the pre-baked anode electrolysis technology, the method of mixing the crushed electrolyte crust block with alumina powder and u...

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Problems solved by technology

Operators need to wear heavy-duty protective equipment, be close to the exposed electrolyte melt at more than 900 degrees, overcome extreme environmental factors such as high temperature, strong magnetism, dust, and dense smoke, and carry out heavy-duty operations such as slag removal, block removal, masonry, and edge closing. Physical work, which poses a great physical and mental challenge to the operators, makes it difficult to recruit and retain people for electrolytic positions, and is often dissatisfied with employees

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