Definition
Extracts metals from ores using controlled high temperatures and a reducing environment, then produces usable materials through melting, casting, or forging.
Smelting was the first clear technology to apply a controlled heat source across domains to change material properties. It requires fuel, furnace structures, airflow, ore, and casting to work together.
Principles and impact
Problems solved
- Converts metal-bearing constituents of ores into workable metals or alloys.
- Produces tool materials that are more durable than stone, can be cast, and can be reworked repeatedly.
Principles
- Fuel releases heat and provides a reducing atmosphere; furnace temperature and the charge composition determine the state of metals and alloys.
- Molten metal can be poured into a mold and solidifies into a predetermined shape as it cools.
Improvements
- Expands the range of usable ores and material properties beyond working native metals.
Significance
- Applied control of fire to material production, forming an industrial chain of mining, fuel, furnaces, and casting.
History and applications
People
Ancient metallurgical craftspeople
Organizations
Bronze Age casting workshops
Events
Bronze-casting workshops emerged in northern China around 1700 BCE
Applications
Production of copper, bronze, and iron、Tools, weapons, and agricultural implements
Limitations
- High temperatures, ore grade, fuel supply, and furnace materials jointly limit output.
Upstream and downstream relations
Upstream
Sources: Ancient Chinese BronzesIron and Steel Industry Energy and Environmental Profile
Downstream
No direct downstream relations recorded