A comparative analysis on the physical nature of the fly ashes, obtained from three thermal power plants, situated in West Bengal, India is presented in this work. The particle size of the fly ash samples are estimated, and their morphology and compositional analysis are made. These samples are crystalline, and the major components are mullite and quartz. Quantitative magnetic characterizations...

The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using residues, which used degrade polyurethane (PU) solid by alcoholysis with ethylene glycol (EG) and ethanolamine (ETA) bi-component, modified regenerated polyol materials obtained double synergistic re...

The microwave-drilling technique using an open-end coaxial applicator was disclosed recently [1-3]. This paper presents new experimental and theoretical results of microwave-drilling studies in various ceramics, including mullite, alumina, and zirconia. The paper reviews the microwave-drill principles and describes the experimental setup and procedures. Aspects of igniting the microwavedrilling...

A new SUZ-4 zeolite membrane with tetraethlyammonium hydroxide as the template was fabricated on mullite tube via hydrothermal sol-gel synthesis in a rotating autoclave reactor. The suitable synthesis condition was SiO2:Al2O3 ratio of 21.2 for 4 days at 155 °C crystallization under autogenous pressure. The obtained SUZ-4 possessed a high BET surface area of 396.4 m/g, total pore volume at 2.611...

Because of economics, petroleum coke sometimes replaces or supplements coal as a fuel in power plant combustors. Fly ashes were recovered from the combustion of petroleum coke with moderateto high-sulfur Illinois Basin bituminous coal in a western Kentucky power plant. The fly ashes primarily consist of glass, quartz, mullite and spinels. When compared with ordinary fly ashes from Illinois Basi...

In this study, mullite-based ceramics were prepared by substituting alumina slag (valoxy) and rice husk ash (RHA) for commercially pure quartz, respectively. Five body compositions containing 5, 10, 15, 20% valoxy: RHA created. At 75MPa load, the formulated bodies thoroughly mixed homogeneously uniaxially compacted to produce cylindrical shaped samples 30 mm diameter 50 high. After compacting s...