fly ash
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A sample of fly ash.
English
Etymology
From fly (“(obsolete) act of flying”, noun) + ash.
Pronunciation
- (Received Pronunciation) IPA(key): /ˈflaɪ æʃ/
- (General American) IPA(key): /ˈflaɪ ˌæʃ/
Audio (GA) (file)
Noun
- A residue generated in the combustion of powdered coal or other materials, comprising the fine particles that rise with the flue gases; when generated industrially it is usually captured and can be recycled for use in construction materials.
- Synonym: flue ash
- Hypernym: ash
- Coordinate terms: bottom ash, potash
- 1956 December, Edmund F. Rasmussen , “Heating System”, in Inspection and Maintenance of Lumber Dry Kilns and Equipment: Information on Ways and Means of Keeping Lumber Dry Kilns Operating Efficiently (Report no. 1900-4), Madison, Wis.: Forest Products Laboratory, Forest Service, United States Department of Agriculture in association with the University of Wisconsin, →OCLC, page 19:
- Heat exchangers should be kept free of debris to minimize the possibility of fire. Fly ash deposited in heat exchangers may cause nonuniform temperatures. Therefore, the exchangers should be disconnected and cleaned out regularly.
- 1964 August, “BR in 1963 – ‘We have Turned the Financial Corner’”, in Modern Railways, Shepperton, Surrey: Ian Allan Publishing, →ISSN, →OCLC, page 115:
- Among new freight vehicles was a prototype 21-ton wagon with pressure discharge for the conveyance of fly ash from power stations, […]
- 1975 May, Joseph W Simons, “Fuels and Burners”, in Home Heating: Systems, Fuels, Controls (Farmers’ Bulletin; no. 2235), Washington, D.C.: Agricultural Research Service, United States Department of Agriculture, →OCLC, page 19, column 2:
- Furnaces and boilers with horizontal heating surfaces require frequent cleaning, because fly ash (fine powdery ash) collects on these surfaces.
- 2022 September 7, Gareth David, “Class 20 Stronghold in the Peak District”, in Rail, number 965, Peterborough, Cambridgeshire: Bauer Media, →ISSN, →OCLC, page 45:
- Besides our sending out of cement by rail, we also bring in pulverised fly-ash, typically once a week, which comes from Drax Power Station and is used in the cement manufacturing process, […]
Hypernyms
Translations
residue generated in the combustion of powdered coal or other materials, comprising the fine particles that rise with the flue gases
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References
- ^ “fly ash, n.”, in OED Online
, Oxford, Oxfordshire: Oxford University Press, September 2023; “fly ash, n.”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
