Within the integrated steel production, pelletization is a technique to prepare raw materials for feeding usually the Blast Furnace and to re-use by-products. In the present work samples of Basic Oxygen Furnace slag, provided by an Italian steelworks, were treated by different physical separation techniques like magnetic separation. After selecting the appropriate slag quality characterization, studies have shown that the slag properties would be affected by handling and processing. The experimental tests involved crushing, grinding of samples followed by two steps of sieving to reach a grain size lower than 4 mm. The combination of different factors and best outcomes in magnetic separation showed an important role in the selection of particle size of 2 mm with higher iron and lower phosphorus amount. This investigation allowed good pellets production, leading to improve the Basic Oxygen Furnace slag management and to recover high-grade iron material to be recycled in metallurgical processes.

Authors: Vitantonio Colucci, Teresa Annunziata Branca, Valentina Colla, Lea Romaniello

Published in: World Congress on Sustainable Technologies (WCST-2017)

  • Date of Conference: 11-14 December 2017
  • DOI: 10.20533/WCST.2017.0012
  • ISBN: 978-1-908320-78-0
  • Conference Location: University of Cambridge, UK