What Are The Main Uses Of Fly Ash


Tiny ash particles emitted during the combustion of fuel (mainly coal). Its particle size is generally between 1-100μm. Also known as fly ash or soot. The fine solid particles in the ash content of the flue gas produced by the combustion of the fuel. Such as fine ash collected from flue gas in coal-fired power plants. Fly ash mainly contains silicon dioxide (SiO2), alumina (Al2O3) and iron oxide (Fe2O3), etc., and has been widely used in the manufacture of cement and various lightweight building materials.

Uses of Fly Ash

1. Fly ash can be used as an admixture for cement, mortar and concrete, and becomes a component of cement and concrete. Fly ash is used as a raw material instead of clay to produce cement clinker, making sintered bricks, and autoclaved aerated concrete , Foam concrete, hollow bricklaying, sintered or non-sintered ceramsite, paving roads;

2. Construction of dams, construction of ports, farmland potholes and lowlands, coal mine subsidence areas and backfilling of mines;

3. Floating beads, micro beads, iron powder, carbon, aluminum and other useful substances can also be sorted from them. Among them, floating beads and micro beads can be used as insulation materials, refractory materials, plastics, and rubber fillers, respectively.

The Main Source Of Fly Ash

The main sources of fly ash are thermal power plants and urban central heating boilers fueled by pulverized coal. More than 90% of them are wet discharge ash, which has lower activity than dry ash, and costs water and electricity, pollutes the environment, and is not conducive to integration. use. In order to better protect the environment and facilitate the comprehensive utilization of fly ash, considering the maturity of dust removal and dry ash transportation technology, dry ash collection has become the development trend of fly ash collection in the future.

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