Worn Refractory Bricks – Alko: Resource of Corundum and Mullite Clinkers
1 Technical University of Košice, Faculty of Materials, Metallurgy and Recycling, Institute of Metallurgy, 042 00 Košice/Slovakia
2 R.M.S. a.s., 042 00 Košice/Slovakia
Volume 9, Issue 4, Pages 84 - 88
Determination of the recycling possibilities of worn materials obtained from Alko 80 AMC-S and Alko 60 A refractory bricks is the aim this work. The spent linings from the pouring ladle for pig iron transport and steel ladle were investigated. The quality and composition of the particle-size classes were evaluated after crushing of the spent linings. The degree of contamination of refractory masses, the redistribution of the fundamental components (Al2O3, MgO, SiO2, C) into grain fractions of (0–1 mm), (1–2,5 mm) and (2,5–5 mm) and magnetic proportion were observed. The iron particles and Fe- and Ca-compounds are mainly concentrated in the magnetic proportion. 70–75 mass-% of refractory material from spent Alko 80 AMC-S bricks could be effectively recycled. It is possible to obtain the size class of 1–5 mm with content up 80–85 % of Al2O3. The redistribution into size classes during the crushing of the spent Alko 60 A bricks did not occur. After removing the magnetic fraction, the residue contains more than 95 % of (Al2O3+SiO2) with the dominant mullite phase.
recovery, post-morten refractory material, alumina silicate
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