Pig Iron Production
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Pig Iron Production

Pig iron production in blast furnace and cupola. Steel pig iron, hematite pig iron and nodular pig iron — each produced to different chemical composition targets.

Pig iron is the most fundamental iron source forming the liquid metal pool of steel foundries and steelworks. Primary pig iron is produced in blast furnaces with continuous charging of iron ore, coke and limestone; while cupola furnaces are used in foundries for remelting scrap, pig iron and coke.

Steel Pig Iron with low P and S content is suitable for steel production, providing a cleaner iron input compared to scrap in EAF plants. Hematite Pig Iron, rich in C and Si, improves melting efficiency in grey cast iron production. Nodular Pig Iron is the most critical pig type requiring ultra-low impurities for ductile iron production.

Technical Parameters

Pig Iron Production — Key technical data of the process

Liquid metal temperature
1450–1550°C
Nodular pig
max 0.05% Mn, max 0.015% S, max 0.05% P
Basic pig iron
3.5–4.5% C, low P and S
Hematite pig
3.5–4.5% C, 1.0–3.0% Si
Standard ingot
10–12 kg notch-free
Slag basicity ratio
CaO/SiO₂ = 1.0–1.2

Equipment & Facilities

  • Blast furnace vertical shaft
  • Cupola furnace
  • Hot blast stoves (cowper stoves)
  • Charge preparation bunkers
  • Pig iron casting machines (ingot casting)
  • Slag granulation system
  • Gas cleaning and energy recovery units

Quality Control Points

  • C, Si, Mn, P, S analysis via spectrometer
  • Thermal analysis for liquidus temperature and carbon equivalent
  • Ingot sampling per tapping batch
  • Slag composition monitoring
  • Trace element control for nodular pig iron (Ti, V, Al, Pb)

Reference Standards

ASTM A43EN 1561EN 1563ISO 185

Related Products

Products obtained or used in this production process

Technical Support & Quote

Pig Iron Production — For detailed technical information, capacity details and custom production requests, contact our expert team.