Examination of scrap mixed metal from the perspectives of hazardous substances control and material recovery

Abstract

We surveyed the material flow of mixed scrap metal. We sampled 10 tons of scrap mixed metal three times in order to examine contained items and hazardous materials in the metal scrap. Many industrial gas appliances and other home electric appliances were identified. From the perspectives of hazardous materials control, lead-coated heat exchanger was observed. Also, CFC12 as coolant, that was not extracted properly in advance, was detected from the conventional air conditioner.