Preparation method of anode covering device for aluminum electrolysis

Abstract

The invention provides a preparing method and a using method of an aluminum electrolytic anode covering device. The preparing method comprises the steps of agitating and leaching dross generated in aluminum electrolysis remelting aluminum ingot production or aluminum alloy smelting process with water to obtain slurry, then washing leached residues obtained by pressing and leaching the slurry through three sections of reversed flow to obtain cleaned residues and then pressing the cleaned residues into the anode covering device. The anode covering device (2) comprises at least four semicircular through holes (2a) where anode steel claws are arranged. The using method is that two anode covering devices are symmetrically arranged on the upper surface of an anode carbon block and then are arranged into an electrolytic cell together, the gaps between anodes and the gaps between the anode steel claws and the anode covering devices are coated and sealed by aluminum ash cleaned residues, the spaces formed between middle joints and hearths are filled with and sealed by covering material shell blocks of the electrolytic cell and aluminum ash cleaned residues. By means of the preparing method and the using method, the problems that aluminum electrolytic anode covering is complex in operation and large in labor intensity of workers are solved, and recycling of waste aluminum ash is achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis anode covering and recycling of aluminum electrolysis waste, in particular to a method for preparing and using a replacement aluminum electrolysis anode covering device prepared by using waste aluminum ash. Background technique [0002] In the current aluminum electrolysis production process, the anode cycle of the electrolytic cell is generally about 30 days, and the anode needs to be replaced during the service life of the anode. layer covering. The method of adding covering material in the prior art is to use 2 to 5 cm of electrolytic cell surface shell block broken material to lay evenly and densely on the surface of the anode, with a thickness of 12 to 20 cm, and then add sandy oxide on the surface of the electrolytic cell surface shell block crushed material. Aluminum and sand-like alumina flow into the gap between electrolyte and alumina agglomeration according to their good ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the prior art such as complex operation of aluminum electrolysis anode covering and high labor intensity of workers by disposing of the existing waste aluminum ash and applying it as an aluminum electrolysis anode cover in aluminum electrolysis. Recycling of aluminum ash, providing a method for preparing and using an electrolytic anode covering device that can replace aluminum electrolytic anode covering materials

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