RT Book, Section
T1 Synthesis of alumina based on industrial waste material
A1 López De Andrés, María Sol
A1 Fillali, Laila
A1 Jiménez Martín, Juan Ángel
A1 Tayibi, H.
A1 Padilla Rodríguez, Isabel
A1 López Delgado, Aurora
A2 Castro, Fernando
A2 Vilhariño, Cándida
A2 Carvalho, Joana
AB A hazardous waste generated in slag milling process by the aluminium industry was usedas a raw material for the synthesis of alumina, α-Al2O3. This waste is considered ashazardous material in the European legislation due to the release of toxic gases(hydrogen, ammonia, methane and hydrogen sulphide) in the presence of water. Theprocess developed in this work allows to obtaining 1 ton of alumina from 4 tons ofhazardous waste and generates an inert solid residue consisting principally of spinel,corundum and quartz with possible uses in cements or glass industry. This processconsisted of two steps: in the first one, nearly 90% of aluminium present in the waste isrecovered as a nanocrystalline boehmite, γ-AlOOH by hydrothermal treatment of thewaste. In the second step, the alumina is obtained by calcination of the boehmite at1400ºC in air. The chemical composition of the alumina obtained consisted of 95% Al2O3,3.3% Fe2O3, 0.8% SiO2 and other minor oxides to balance.
PB CVR – Centro para a valorização de Resíduos
SN 978-989-97429-1-8
YR 2011
FD 2011
LK https://hdl.handle.net/20.500.14352/45312
UL https://hdl.handle.net/20.500.14352/45312
LA eng
DS Docta Complutense
RD 21 abr 2025