The main oxides of fly ash in China's thermal power plants are SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 and so on. With the development of electric power industry, the discharge of fly ash from coal-fired power plants is increasing year by year, and it has become one of the industrial wastes with large displacement in China. If a large amount of fly ash is not treated, it will produce dust and pollute the atmosphere. If discharged into the water system, it will cause the silting of the river, and the toxic chemicals in it will also cause harm to human and biological. But fly ash can be used as resources, such as as an admixture of concrete.

Glow Stones absorb either natural or artificial light and then emit that light as a soft glow during darkness. Exposure of around 30 minutes will give a glow time of approximately 6 – 8 hours. The glow starts off brightly and diminishes as the night progresses. The photoluminescent compound, strontium aluminate which makes the stones glow has a cycle life of at least 10 years.

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