What open-hearth furnace is made of
The Siemens–Martin regenerative furnace.
- Furnace bath with molten steel — has part. A flat hearth with liquid metal.
- Regenerator checkerwork — has part. Checkerwork heats the air and gas with the heat of the exhaust gases.
- Furnace arched roof — has part. A refractory roof.
- Cast iron — uses. The furnace melts pig iron and scrap into steel.
- Brick — is made of. An open-hearth furnace is built of firebrick.