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One of the most significant problems related to pressurised pulverised coal combustion (PPCC) is the separation of the fly ash at operating conditions (gas temperatures of 1400 °C and a pressure of (up to) 16 bar). To determine the efficiency of an advanced multi-stage separation device, which was made to deliver clean gas (upstream of a turbine) with a required maximum particle size smaller than...
In this paper, the properties of fly ash–lime granule unfired bricks are studied. Granules were prepared from mixtures of fly ash and lime at fly ash to hydrated lime ratios of 100:0 (Ca/Si=0.2), 95:5 (Ca/Si=0.35) and 90:10 (Ca/Si=0.5). After a period of moist curing, the microstructure and mineralogy of the granules were studied. Microstructure examination reveals that new phases in the form of needle-like...
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