ELECTRIC ARC FURNACE SLAG
Electric arc furnace slag (EAFS) is a byproduct that outcomes from the 3rd phase of the metallurgical process, fine grained (90% grain size less than 2mm), 98% amorphous (due to sudden cooling into water), consisted mainly of SiO2 (about 40%), FeO (about 35%) and other oxides (of Al, Mg, Cr, and Ca ).

EAFS is used as sand blasting material and due to its pozzolanic properties (active SiO2), is suitable for utilization in the production of cement as a constituent main or minor, as it is demonstrated in a latest study (November 2011) of the Laboratory of Inorganic & Analytical Chemistry of School of Chemical Engineering of N.T.U.A.

CONVERTER SLAG
Converter slag is a byproduct that outcomes from the 4th phase of the metallurgical process, crushed to -5mm, consisted mainly of Fe-oxides (Fe total about 60%) and used mainly as aggregate for the production of special type of concrete for covering oil tubes, or other similar works, in several places in the world.