Mai . 15, 2024 16:14 Back to list

Fly Ash Meaning

Fly ash is fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. The main oxides of fly ash from thermal power plants in China are SiO2 _ 2, Al _ 2O _ 3, Fe2O3, Fe _ 2O _ 3, CaO and TiO2 _ 2.

Appearance Of Fly Ash

Fly ash looks like cement and its color is milky.It varies from white to grayish black. The color of fly ash is an important quality index, which can reflect the amount and difference of carbon content. To some extent, coal ash fly ash can also reflect the fineness of fly ash. The darker the color, ultrafine fly ash and the higher the carbon content.

Fly Ash Making

The main sources of fly ash are coal-fired power plants and urban central heating boilers, of which more than 90% are wet discharged ash, which has lower activity than dry ash, costs water and electricity, pollutes the environment and is not conducive to comprehensive utilization. In order to better protect the environment and benefit 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.

Effect of Fly Ash

With the development of electric power industry, the emission of fly ash from coal-fired power plants has increased year by year, and it has become one of the industrial waste residues with large discharge in China. If a large amount of fly ash is not treated, it will produce dust and pollute the atmosphere; If pulverised fly ash is discharged into the water system, it will cause river siltation, and the toxic chemicals in it will also cause harm to human body and biology. However, fly ash can be used as a resource, such as as an admixture for concrete.

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Fly Ash Use