USE OF FLUIDIZED BED COMBUSTION ASH AND OTHER INDUSTRIAL WASTES AS RAW MATERIALS FOR THE MANUFACTURE OF CALCIUM SULPHOALUMINATE CEMENTS
(0) Calcium sulphoaluminate cements, mainly composed by 4CaO·3Al2O3·SO3 and 2CaO·SiO2, are special hydraulic binders which require limestone, bauxite and gypsum as natural raw materials for their manufacture. In order to save bauxite and natural gypsum, it has been explored the possibility of using, among the raw mix components, FBC waste together with pulverised coal fly ash or anodization mud and, when necessary, flue gas desulphurization gypsum. Mixtures containing limestone (29-39％), FBC waste (30-44％), pulverised coal fly ash (0-13％) or anodization mud (0-32％), bauxite (0-18％) and flue gas desulphurization gypsum (0-8％) were heated for 2 hours in a laboratory electric oven at temperatures ranging from 1150° to 1300℃. The X-ray diffraction patterns on the burnt products generally showed a good conversion of the reactants and a high selectivity degree towards 4CaO·3Al2O3·SO3, particularly at 1250℃.
waste utilization raw materials cement manufacture calcium sulphoaluminate cements
M.Marroccoli F.Montagnaro M.L.Pace A.Telesca G.L.Valenti
Dipartimento di Ingegneria e Fisica dell’Ambiente, Universitàdegli Studi della Basilicata,Potenza, 8 Dipartimento di Chimica, Universitàdegli Studi di Napoli Federico II, Napoli, 80126, Italy Dipartimento di Ingegneria e Fisica dell’Ambiente, Universitàdegli Studi della Basilicata, Potenza,
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
1072-1077
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）