Wastes generated in a bench-scale atmospheric fluidized bed combustor, using two different coals and a high-lime limestone, sorbent, were employed as raw materials for the synthesis of calcium sulphoaluminate (4 CaO•3 Al2O3•SO3)-based cements, which can be utilized for a wide range of applications. Raw mixes containing the bed material were heated in an electric oven in the temperature range 1000°–1200°C. The best results in terms of reactants conversion, and selectivity towards 4 CaO•3 Al2O3•SO3 were obtained at 1200°C with the addition of an external source of alumina which was required to avoid melting phenomena or integrate the Al2O3 content, necessary for the 4 CaO•3 Al2O3•SO3 formation.
Calcium sulphoaluminate cements made from fluidized bed combustion wastes
BERNARDO, Graziella;MARROCCOLI, Milena;
2000-01-01
Abstract
Wastes generated in a bench-scale atmospheric fluidized bed combustor, using two different coals and a high-lime limestone, sorbent, were employed as raw materials for the synthesis of calcium sulphoaluminate (4 CaO•3 Al2O3•SO3)-based cements, which can be utilized for a wide range of applications. Raw mixes containing the bed material were heated in an electric oven in the temperature range 1000°–1200°C. The best results in terms of reactants conversion, and selectivity towards 4 CaO•3 Al2O3•SO3 were obtained at 1200°C with the addition of an external source of alumina which was required to avoid melting phenomena or integrate the Al2O3 content, necessary for the 4 CaO•3 Al2O3•SO3 formation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
