Separating Pro-Environment Technologies for Waste Treatment, Soil and Sediments Remediation

Indexed in: Scopus, EBSCO, Book Citation Index, Science Edition; BIOSIS Previews.

The removal of contaminants and pollutants from natural or valuable materials is a critical issue in environmental management and conservation. Fundamentally, the procedure consists of measures ...
[view complete introduction]

US $
15

*(Excluding Mailing and Handling)



Upgrading of Post-Consumer Steel Scrap

Pp. 77-89 (13)

DOI: 10.2174/9781608054725112010008

Author(s): F. Quarta, A. Bonoli, P.C. Rem

Abstract

Post-consumer steel scrap resulting from End-of-Life Vehicles (ELV), Waste from Electric and Electronic Equipment (WEEE) and Incineration Bottom Ash (IBA) is often hand picked for copper, stone, cloth and other contaminants, in order to meet the specifications of the steelmakers. At capacities of 20 t/h of scrap or more, the efficiency of hand sorting generally becomes problematic, hence, leaving half of the copper in the steel product. New technologies are presently being proposed to facilitate or even eliminate hand sorting of these types of scrap, allowing operators to increase revenues from copper, expand plant capacity, realize a higher and more consistent steel product quality or avoid legal constraints associated with hand pickers. A shape-sensitive magnetic separator called “Clean Scrap Machine” (CSM) pre-sorts the scrap into a bulky thin-walled steel fraction of consistently high purity and a volumetrically much smaller flow of relatively heavy parts in which the contaminants are concentrated. The latter flow can either be sorted by a much smaller number of hand pickers, by sensor sorting, or it can be sold directly to specialized sorters to extract the copper. Detailed results are reported for mid-sized IBA scrap.

Keywords:

Steel scrap, Recycling, Hand picking.