Comprehensive utilization of fly ash

When it comes to the comprehensive utilization of fly ash, it is often easy to think that fly ash can be used to produce aerated concrete, building blocks, microcrystalline glass, and can also be used as a raw material for cement production, used to produce various decorative panels, geopolymers, and so on.

Characteristics and differences between slag powder and fly ash

Slag powder and fly ash are two widely used auxiliary cementitious materials in the concrete industry. Most concrete production processes now incorporate one or two auxiliary materials. As a result, their performance is frequently compared by concrete technicians to seek more suitable concrete ratios.

The water reducing effect of ultrafine fly ash

Ultrafine fly ash has a dosage limit when improving the fluidity of cement slurry, and when the dosage limit is exceeded, the fluidity of the slurry deteriorates; When the fly ash content is the same, the strength of the cement slurry increases with the increase of fly ash fineness, but the fluidity will deteriorate accordingly;

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.

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.

Grinding process of fly ash

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.

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.