Assertion: blast furnace's operation | /r/HasProperty | discontinued for short period of time
Facets:
value: to 16 hours
type: TEMPORAL
Source sentences:
text: For the blow out, the operation is discontinued for a short period of time roughly 12 hours to 16 hours before the last casting of the blast furnace is done to permit the installation of water sprays in the top of the furnace and thermocouples in the uptakes.