Among the low-energy binders, calcium sulphoaluminate cements are worthy of consideration also because a wide range of industrial solid wastes can be utilized in their manufacture. In this paper, it has been proposed the use of mixtures composed by fluidized bed combustion wastes as raw materials for the synthesis of calcium sulphoaluminate cements. Several systems based on two fluidized bed combustion-derived wastes (a sulpho-calcic fly ash and a silico-aluminous fly ash) and a solid waste generated within a traditional coal-fired power plant were heated in a laboratory electric oven for 2 hours at temperatures ranging from 1050°C to 1300°C. Calcium sulphoaluminate was often obtained and its formation was related to the waste nature and the burning temperature.
Use of fluidized bed combustion wastes for the synthesis of low-energy cements / G., Bernardo; M., Marroccoli; Montagnaro, Fabio; G. L., Valenti. - STAMPA. - (2003), pp. 1227-1237. (Intervento presentato al convegno 11th International Congress on the Chemistry of Cement tenutosi a Durban, South Africa nel 11-16 Maggio).
Use of fluidized bed combustion wastes for the synthesis of low-energy cements
MONTAGNARO, FABIO;
2003
Abstract
Among the low-energy binders, calcium sulphoaluminate cements are worthy of consideration also because a wide range of industrial solid wastes can be utilized in their manufacture. In this paper, it has been proposed the use of mixtures composed by fluidized bed combustion wastes as raw materials for the synthesis of calcium sulphoaluminate cements. Several systems based on two fluidized bed combustion-derived wastes (a sulpho-calcic fly ash and a silico-aluminous fly ash) and a solid waste generated within a traditional coal-fired power plant were heated in a laboratory electric oven for 2 hours at temperatures ranging from 1050°C to 1300°C. Calcium sulphoaluminate was often obtained and its formation was related to the waste nature and the burning temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
