Physico-chemical characterization of slag waste coming from GICC thermal power plant

Abstract

The new gas installations of combined cycle (GICC) thermal power plants for production of electricity are more efficient than conventional thermal power plants, but they produce a high quantity of wastes in the form of slags and fly ashes. Nowadays, these by-products are stored within the production plants with, until now, no applications of recycling in other industrial processes. In order to evaluate the capability of these products for recycling in glass and ceramics inductory, an investigation for the full characterization has been made by usual physico-chemical methods such as chemical analysis, mineralogical analysis by XRD, granulometry, BET, DTA/TG, heating microscopy and SEM/EDX.

Preliminary determination of the suitability of slags resulting from coal gasification as a pozzolanic raw material / Wstępne Określenie Przydatności Żużli Ze Zgazowania Węgla Jako Surowca Pucolanowego

“…The X-ray analysis shows a characteristic increase in the background at the 2 q angle in the range between 15°and 40° (Figure 2 and 3). The main and only mineral component in slag MI is glassy phase, which is confirmed by the studies of other authors (Acosta et al 2001(Acosta et al , 2002Aineto et al 2006;Song et al 2010a, b). Slag BA contains -besides the glassy phase -crystalline phases, namely mullite In order to study the impact of particle size of slags on their pozzolanic activity, the samples were ground and sieved through a 63 mm sieve.…”

Characteristics of selected wastes from carbon gasification

“…2). However, the obtained results differ from those obtained by other authors, because in the tested wastes only the amorphous phase was determined (Acosta et al 2001(Acosta et al , 2002Aineto et al 2006;Song et al 2009Song et al , 2010.…”

Characteristics of silicate glasses derived from vitrification of manganese crust tailings

“…Lack of distinct exothermic peaks may be taken as lack of crystallization [26]. Acosta et al [27] reported that power plant derived glass was considered stable due to lack of clear exothermic peaks in the DTA curve. Shelby [26] reported that, slow cooling of glass melts tends to diminish the occurrence of thermal shock and weakening of the glass.…”