[1A4] Detection and classification of non-ferrous metals with magnetic induction for recycling
K Williams, M O’Toole, M Mallaburn and A Peyton
University of Manchester, UK
Magnetic induction is widely used as a non-destructive technique to detect and classify metal objects over a range of applications. This paper applies magnetic induction spectroscopy (MIS) as a technique to classify non-ferrous metals within shredded metal waste streams on a moving conveyor. The magnetic response of the metal piece as it passes over the sensor is used to predict the metal, where the measured complex impedance components are used as features for the machine learning models. MIS performs well even when surface contaminants are present, compared to other techniques that require the metal pieces to be cleaned; this saves time and cost when large amounts of surface contamination are present in a waste stream, such as biomass incinerator metals. MIS allows for a lower-cost system when compared to X-ray and float-sink methods, with a high throughput that makes it an economical approach.
Keywords: magnetic induction spectroscopy, non-destructive evaluation, recycling, non-ferrous, batteries.
Keywords: magnetic induction spectroscopy, non-destructive evaluation, recycling, non-ferrous, batteries.
