Research on the Whiteness and Properties of Modified Coal Fly Ash
نویسندگان
چکیده
In the filling of polymer, coal fly ash has been limited in use by its unlovely grey color. In order to improve the qualities of coal fly ash from Huaneng Power international Incorporation Dezhou Power Plant, its meso-structure and influencing factors on whiteness have been tested and analyzed. Ca(OH)2-H2O-CO2 system to modify the fly ash is conducted. Round coating testify that the system can be achieved under suitable operating parameters. Experimental data show that the method of modification and whitening is available. Compared to raw fly ash, the coated fly ash is of high whiteness with 73.13, high specific surface area with 9.77 m·g and high coating ratio next to 100%. Filling-test in polymer also show that rough surface of coated fly ash enhances the area of the materiel contacting as well as improve the matching state between fly ash beads (also contain a small quantity of cenosphere) and polymer granules when they are blended.
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