Mineralogical study of calcined coal waste in a pozzolan/Ca(OH)2 system
作者： Rosario García , Raquel Vigil de la Villa , Moisés Frías , Olga Rodriguez , Sagrario Martínez-Ramírez
DOI: 10.1016/J.CLAY.2015.02.014
关键词: Aluminate 、 Activated carbon 、 Carbonate 、 Hydrate 、 Hydroxide 、 Chemical engineering 、 Pozzolan 、 Calcination 、 Saturation (chemistry) 、 Mineralogy 、 Chemistry
摘要: Abstract Activated carbon mining waste influences the formation of hydrated phases, their saturation indexes and mineral stability fields during pozzolanic reactions. The behavior these reactions is predicted in this study by examining influence at 600 °C over 2 h, means a thermodynamic model running on computer program for speciation, batch-reaction, one-dimensional transport, inverse geochemical calculations (PHREEQC program: pH - RE dox- Eq uilibrium Program C ). Experimental analysis solid phases shows early monosulfoaluminate hydrate, C–S–H subsequent precipitation laminar minerals, tetracalcium aluminate layered double hydroxide compounds (phyllosilicate/carbonate) (LDH) stratlingite. Monosulfoaluminate hydrate was formed day one reaction samples with activated coal waste. confirmed experimental observations.
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