fly ash

noun

1. fine particles of ash of a solid fuel carried out of the flue of a furnace with the waste gases produced during combustion.
2. such ash recovered from the waste gases, used chiefly as a reinforcing agent in the manufacture of bricks, concrete, etc.

fly ash

noun

1. fine solid particles of ash carried into the air during combustion, esp the combustion of pulverized fuel in power stations

Word History and Origins

Origin of fly ash¹

First recorded in 1930–35

Example Sentences

In fact, the heaps of fly ash waste produced by coal-processing power plants are often just as — if not more radioactive — than nuclear waste sites.

From Salon

Large concrete beam prototypes have been created using both fly ash and pond ash and shown to meet Australian Standards for engineering performance and environmental requirements.

From Science Daily

Industry has been trying to find a use for materials like fly ash that predominantly end up in landfills, she explains.

From Science Daily

The Tour lab has used Flash Joule heating for a variety of applications, including hybrid carbon nanomaterials synthesis, battery part recycling and heavy metal removal from coal fly ash.

From Science Daily

Shortly before 9 a.m. local time, the three plant employees were working on unplugging the facility’s western silo which contains fly ash, a type of coal ash and a byproduct from creating power.

From Washington Times