Aceralia was a large Spanish steel producer formed in 1997 by restructuring of a group formed from earlier mergers of the steel producers ENSIDESA and Altos Hornos de Vizcaya. The company merged into Arcelor in 2001, and became part of ArcelorMittal in 2006. ==History== ===ENSIDESA=== In 1950 the state owned company Empresa Nacional Siderúrgia So...