Recycling method for aluminum in aluminum air battery electrolyte and system

Abstract

The invention discloses a recycling method for aluminum in aluminum air battery electrolyte and a system and belongs to the technical field of aluminum air battery recycling. According to the recycling method for aluminum in aluminum air battery electrolyte, aluminum in the electrolyte is recycled in the use and the circulation process of an aluminum air battery, by controlling a causticity ratioand a temperature gradient of the electrolyte, sodium aluminate in the electrolyte is decomposed into Al(OH3) precipitate, by taking solid Al(OH)3 as a raw material, metallic aluminum is prepared in the melting process, production difficulties are reduced, the process is simple, and the cost is relatively low; by adopting the recycling method, sodium hydroxide electrolyte is recycled after Al(OH)3precipitate is removed, Al(OH)3 is prevented from being deposited on the surface of an aluminum electrode, then the reaction activity of the aluminum air battery is not inhibited by Al(OH)3, and theservice life of the aluminum air battery can be prolonged; the system disclosed by the invention has low requirements on equipment and is applicable to large-scale production, Al(OH)3 is precipitatedto obtain the metallic aluminum which can be used as a cathode of the aluminum air battery, and the technical problem that sodium aluminate is convenient to convert into metallic aluminum at present,can be solved.

Description

technical field [0001] The invention belongs to the technical field of recycling aluminum-air batteries, and in particular relates to a method and system for recycling aluminum in an aluminum-air battery electrolyte. Background technique [0002] With the rapid development of science and technology, people's daily life is full of various primary batteries or secondary batteries. The use of batteries has brought great convenience to our lives, but waste batteries release heavy metal ions, electrolysis The liquid can contaminate soil and water resources. Looking at today's primary batteries or secondary batteries, it is relatively difficult to recycle the main element of the battery (lead metal) except for lead-acid batteries. All kinds of metals used in batteries can only be obtained through complex smelting process. For the smelting process, it is better to start from raw ore than waste batteries, because the impurities in raw ore are simple and easy to separate. The impur...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for recovering aluminum in the electrolyte of an aluminum-air battery, so as to solve the existing problems of difficulty in recovering aluminum from the electrolyte of an aluminum-air battery after use, complicated process, and high cost, while avoiding aluminum The reaction product with the electrolyte produces Al(OH) 3 Precipitated on the surface of aluminum electrodes to improve the service life of aluminum-air batteries

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