Regenerated aluminum pre-treatment technique and regenerated aluminum treatment technique

Abstract

The invention provides a regenerated aluminum pre-treatment technique and a regenerated aluminum treatment technique and relates to the technical field of aluminum alloys. According to the regenerated aluminum pre-treatment technique, discarded zip-top cans are broken into strip-shaped aluminum strips; the aluminum strips are separated sequentially through air separation equipment and magnetic separation equipment, then heated till the temperature is 80-120 DEG C and subjected to curlating; and while being hot, the aluminum strips are added in a first mixing solution of phenylcarbinol, acetic acid and turpentine and stirred for 8-15 min, the volume ratio of the phenylcarbinol to the acetic acid to the turpentine is (3-8):(1-4):(1-3), then the aluminum strips are taken out, placed into a second mixing solution of absolute ethyl alcohol and ethyl acetate and stirred for 5-10 min, the volume ratios of the absolute ethyl alcohol to the ethyl acetate is (4-10):(1-3), and the aluminum strips are dried for 15-20 min under the environment with the temperature being 110-125 DEG C after being washed. Paint layers of the surfaces of the zip-top cans and corrosion prevention thin films of the inner walls of the zip-top cans can be eliminated correspondingly, eliminating efficiency is high, environmental friendliness is achieved, and secondary pollution is avoided. The regenerated aluminum treatment technique comprising the regenerated aluminum pre-treatment technique is simple in technological operation, and the quality of a prepared finished product is high.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a secondary aluminum pretreatment process and secondary aluminum treatment process. Background technique [0002] Aluminum is currently the most used metal except steel in the world. Aluminum is used in a wide range of industries. Aluminum and aluminum alloys are almost omnipresent in all walks of life. With the increase of aluminum production and usage, the amount of discarded aluminum products is also increasing, and many aluminum products are disposable, and the time from product use to loss of use value is relatively short. Therefore, these discarded aluminum products and aluminum miscellaneous materials may become a source of pollution. By the end of the last century, the world consumed 180 billion cans every year, and the aluminum consumption was as high as 2.5 million tons, accounting for about 15% of the world's aluminum consumption. Aluminum cans are a commonly ...

AI Technical Summary

Problems solved by technology

At present, the paint can be removed by heating in a high-temperature furnace, but the pollution is serious, the impurity content is high, and the energy consumption is high; Separate paint stripping, use the composite components of butyl acetate, formic acid, cresol, phenol, acetone and cyclohexanone to strip the paint. The above method needs too many kinds of drugs, and can only simply remove the surface baking paint coating, but not Inner wall film; there is also a composite component of dichloromethane, trifluoroacetic acid and water for paint removal; or a composite component of formic acid, dichloromethane and water for paint removal. Although the above methods can remove the paint layer on the surface of the can and the paint on the inner wall Anti-corrosion film, but dichloromethane has a pungent smell, is volatile and has high toxicity, which will cause pollution to the environment