Diseño de un proceso de recuperación de aluminio por fusión de los empaques tipo blíster

Abstract

An aluminum recovery process was proposed by melting the blister packs used by the pharmaceutical industry, Push Thruogh Blister were used, the method consisted of using electric muffle heat to break the bonds that hold the aluminum sheets with the polymer without degrading it. The temperature and time conditions determined to separate the materials were 180 ° C for 8 minutes, and 200 ° C for 6 minutes, then the samples were passed between the rollers of a duo type laminator to extract the aluminum foil. The average percentage of recovered aluminum foils was 66.7%. The recovered aluminum was compacted before melting, for the melting process, flux was added in a ratio of 1% of the total weight of the material to be melted, and 0.25% w/w degasser, the material was melted at 750 ° C for one hour to obtain a yield of 90%. The cast metal was subjected to hardness, metallographic and spectroscopy tests, determining that the recovered aluminum resembles a 4XX.X (Si) foundry alloy. Additionally, DSC tests were carried out on four samples of the blisters polymer.