Vitrification of fly ash from thermal power stations

摘要: Samples of fly ash from Spanish thermal power plants were vitrified after mixing with other inorganic wastes such as dolomite slag and glass cullet. The relative viscosity crystallisation behaviour the glasses obtained investigated by hot stage microscopy (HSM) differential analysis, which reheating schedules chosen for recrystallisation. X-ray diffraction analysis (XRD) showed that diopside (augite) and/or wollastonite could be crystallised these glasses, giving rise to dendritic acicular microstructures observed analysed scanning electron (SEM/EDX). It was shown ceramics so had improved mechanical properties compared untreated Vickers microhardness (H v )=5-6.9 GPa, elasticity modulus (E)=59-101 GPa toughness (K IC )=1.7-1.8 MPa.m 1/2 maximum ranges products showing better properties.