EAFD-loaded vitreous and glass–ceramic materials

Hydrometallurgical process for zinc recovery from electric arc furnace dust (EAFD)

“…Plants from Europe generate around 500,000-900,000 tonnes of dusts per year [6]. In Greece all five steel factories are scrap-recycling facilities, where a total amount of 15,000 tonnes of EAFD is produced annually [7]. Such significant quantities are due to the fact that for every ton of recycled steel an amount of 15-20 kg of EAFD is produced.…”

Effect of particle size on kinetics crystallization of an iron-rich glass

“…Among industrial wastes, special attention is paid on those with high iron oxide content, which leads to glass-ceramic materials characterized by high mechanical strength and good chemical stability. In last years, iron-rich glass-ceramics have been obtained from zinc hydrometallurgy wastes [14][15][16], electric arc furnace dusts (EAFD) from the steel production [17][18][19], copper flotation wastes [20] and coal ashes [21].…”

Crystallization process of thermally treated vitrified EAFD waste

“…E1 and E2 samples with crystallization time t = 15 and 30 min, respectively, exhibited wollastonite as the only phase crystallized, verifying previous observations. 8,10 Furthermore, in samples E3 and E4, the appearance a small peak at θ = 27.5 • and the broadening of the main reflection of wollastonite at θ = 30 • can be attributed to the emergence of the new crystal phase, which was observed by optical microscopy and SEM images. Taking the EDXS analysis into account, the new phase was identified as a diopside-like structure (CaMgSi 2 O 6 ).…”

“…In the glass-ceramics with 15 and 30 min crystallization times, wollastonite was the only crystal phase separated from the vitreous matrix, having a stoichiometry that revealed the incorporation of a significant amount of the metallic elements present in the EAFD. 8,10,11 Conversely, in the glass-ceramics with 2 and 60 h crystallization times, except wollastonite a new crystalline phase was observed to separate from the matrix (Fig. 1).…”

“…10,11 , was mixed with 55% SiO 2 , 10% Na 2 CO 3 and 35% CaCO 3 (wt%) powders. In particular, the composition chosen for the formation of vitreous products was the one found to demonstrate the best crystallization state (bulk crystallization), namely 15% EAFD, 55% SiO 2 , 5% Na 2 O, 25% CaO (wt%).…”