“…Other works examine the possibility to use industrial streams as blast furnace slag, [10][11][12][13][14] MSW ashes, 15,16 other fly ashes [17][18][19][20] and different sludge. 5,21,22 In most cases, these residues are used as inert or plastic materials and the sintering process is related mainly to presence of traditional ceramic fluxes in batches.…”