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How to identify ultrafine fly ash?
Fly ash mainly contains silica, alumina, and iron oxide, and has been widely used in the production of cement and various lightweight building materials. In addition, fly ash can also be used as floating beads and as fertilizer and trace compound fertilizer.
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The physical properties of fly ash
Fly ash is the fine ash collected from the smoke and dust after coal ignition. It is a key solid waste discharged from thermal power plants. The appearance of fly ash is similar to that of concrete, and the color tone changes from milky white to black gray.
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At present, in the cement industry, the coarse ash sorted from power plants is generally used as a mixture to be ground together with clinker, gypsum, etc., or the coarse ash is separately ground into ordinary fine ash and then added to cement.
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The application of ultra-fine fly ash in cement production
For cement plants, the "grinding before mixing" post blending method can be adopted, which means that ultra-fine powder does not need to be ground and is directly added at a determined amount during the grinding of the mixed material, saving electricity and ball consumption.
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