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Calcium sulphoaluminate cements made from fluidized bed cmmbustion wastes

Authors
  • Bernardo, G.
  • Marroccoli, M.
  • Montagnaro, F.
  • Valenti, G.L.
Type
Book
Journal
Waste Management
Publication Date
Jan 01, 2000
Volume
1
Pages
750–758
Identifiers
DOI: 10.1016/S0713-2743(00)80085-9
ISBN: 978-0-08-043790-3
Source
Elsevier
License
Unknown

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.

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