noun
cupola furnace; cupola
Technical term in metallurgy; a furnace for melting pig iron in foundries.
この工場では溶銑炉を使って鋳鉄を溶かしている。
This factory uses a cupola furnace to melt cast iron.
Compound of 溶 (melt) + 銑 (pig iron) + 炉 (furnace). The variant 熔銑炉 uses the older character 熔 for melting.