fly ash

fly-ash的词性：
n.（名词）

1. Fine particulate ash sent up by the combustion of a solid fuel, such as coal, and discharged as an airborne emission or recovered as a byproduct for various commercial uses.
飘尘：燃烧（如炭等）固体燃料所散发出的细小粉尘，放出在空中飘浮的灰烬或作为有经济价值的副产品而回收利用