SCRAP CHARACTERIZATION TO OPTIMIZE THE RECYCLING PROCESS

摘要

Managing the secondary production process for aluminum auto-shred scrap is of prime importance considering the projected demand increase for aluminum alloys in the transportation, electronic and packaging industries. Aluminum auto-shred scrap is a major end-of-life, mixed metallic stream that must be recovered and recycled effectively and efficiently to ensure infinite lifetime involving a broad distribution of re-use applications determined by specific alloy chemistry. Currently, secondary recyclers that dilute the melt chemistry using primary aluminum minimally only produce A380.1 as this alloy has broad alloy chemistry specifications. Downgrading mixed auto-shred scrap streams is a significant waste of intrinsic value and reuse applicability. Downgrading here is defined as not utilizing all sortable chemistries within this mixed auto-shred. This, paired with scrap export, are the two major present day options for mixed aluminum scrap.