fanning

in atmospheric chemistry
https://doi.org/10.1351/goldbook.F02319
In blast furnace operation, the idling period between the blowing periods when the blast pressure is reduced to a minimum. This also applies to plume behaviour under @[email protected] conditions.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2188 [Terms] [Paper]