Assertion: blast furnace's hearth diameter | /r/HasProperty | increased to 4.4 m.
Facets:
Source sentences:
text: Then in another 10 years, in 1901, BF was started with similar stack and bosh dimensions as earlier furnace but the hearth diameter was increased to 4.4 m. This furnace produced 463 tons/day at 1113 kg/ton coke rate.