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Lignite is one of the minerals which have impacted largely the development and technological revolution of human society. Du ring the coal use, there are mineralogical remains in the form of ashes, which have different physical, chemical, mineralogical and morphological properties, which largel y depend on the type of coal used, and technology in its combustion. This type of ashe s is presented in thermal power plants in the form of dust or fly ash and inorganic remains, which are separated from the process by dif...