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Recovering inorganic wastes
Vieira, M. T.; Barreiros, F. M.; Catarino, L.The aim of this work is to recover wastes by uniaxial pressing and injection moulding. A previous morphological, chemical and mineralogical identifications of different waste disposal batches guaranteed its reproducibility and revealed that in some cases they should be suitable to be treated by those conformation processes. Different tests regarding the chemical and structural evolution with temperature were pe...
Ceramic products obtained from rock wastes
Catarino, L.; Sousa, J.; Martins, I. M.; Vieira, M. T.; Oliveira, M. M.Residue powders resulting from cutting and machining operations in slate quarries were processed by a press and sintering route to manufacture ceramic products such as flooring and roofing tiles. The first part of this work consisted of a laboratory study carried out by uniaxially pressing the powders to shape and sintering in air using a muffle type furnace. A plan of sintering experiments was followed in orde...
Optimization of the sintering process of raw material wastes
Vieira, M. T.; Catarino, L.; Oliveira, M.; Sousa, J.; Torralba, J. M.; Cambronero, L. E. G.; González-Mesones, F. L.; Victoria, A.The analysis of the mineralogical composition of most rock wastes shows the presence of a high percentage of minerals with SiO2 and Al2O3, which could be used as raw materials for ceramic products. The main objective of this work is to recover wastes from one primary rock industry, utilised in the production of tiles and flooring, for the manufacturing of ceramics, using powder technology: pressing and sinterin...
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