Optimization of the Process of Production of Ceramics From Waste Coal Ash Case Study: The Influence of the Mechanical Activation

Abstract

Fly ash, a waste by-product obtained in a thermal power plant has been a generated problem of the disposal all over the world. Morphological characteristics, physicochemical properties and pozzolanic activity make this waste potential material for production of ceramics. In this study high density ceramics compacts were produced by using fl y ash from the power plant REK Bitola, Republic of Macedonia. In order to increase geometrical factor of activity, the mechanical activation of the fl y ash was applied. The process of optimization of the main process parameters is conducted, such as time of mechanical activation, sintering temperature and heating rate and their interactions on the properties of obtained dense ceramic porosity and bending strength as a response function. The optimization was performed through application of 3D surface method and the obtained results are presented in the graphical and analytical form using "Statgraphics Centurion" software package.

Production and Characterization of Porous Ceramics From Coal Fly Ash and Clay

“…The characterization of fl y ash and clay and the optimization of the composite composition (60wt.% clay and 40 wt.% fl y ash) were presented in a previous publications (Fidanchevska, Jovanov, Angusheva and Srebrenkoska, 2014; Angjusheva, Jovanov, Fidancevska and Lisickov, 2013). The morphology of the three pore creators employed in this investigation are presented in Fig.1.…”