blowdown
n.— «Algoma Steel Inc. plans to shut down its No. 7 blast furnace for maintenance on Friday, July 6. The rebuild is expected to take approximately 25 to 30 days. The actual shutdown process—technically known as “blowdown”—is scheduled to begin at 6 a.m. on July 6 and is expected to last approximately 16 hours.» —“Blowdown at #7 blast furnace starts Friday” SooToday.com (Sault Ste. Marie, Ontario, Canada) July 4, 2007. (source: Double-Tongued Dictionary)