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The recent gas microturbines, suitable even for small-scale cogeneration installations (below 200 kW) have made this technology available to users with relatively limited consumption or, at least, mean that cogeneration may now be easily applied to single machines. The following are the results of a feasibility study, conducted by the Centro Ceramico in collaboration with SACMI and Heat & Power, for the application of a gas microturbine cogeneration system to a tile dryer, and for the measures to permit the installation of such a system without the involvement of the industry in activities outside its core business.
It is well known that asbestos is a health hazard and its progressive elimination is a priority for pollution prevention. Asbestos can be transformed into non hazardous silicate phases by means of thermal treatments. This investigation describes the recycling of microwave inertised asbestos in refractory materials of both alumina-mullite and mullite-cordierite compositions. In the case of mullite-cordierite refractories, it was found that inertised asbestos can be used as raw material to replace the currently used MgO-rich talc.
Glasses from processed nepheline syenite were investigated for glass ceramics using TiO2 as nucleation catalyst. DTA analyses of the base glasses show presence of a crystallization peak near 1000 °C. Crystallization of wollastonite and nepheline were dominant in the glasses of lowest Fe2O3/Al2O3 ratio=0.019, whereas both melilite and hematite developed in the glasses containing Fe2O3/Al2O3 ratio > 0.019. Perovskite appears in the TiO2 doped glasses.
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