CSN Volta Redonda
operatingCompanhia Siderúrgica Nacional SA · BF–BOF Integrated route · Volta Redonda, Central & South America, Brazil
CSN Volta Redonda makes steel by the integrated route: iron ore is smelted into liquid hot metal in a blast furnace, then refined into crude steel in a basic oxygen furnace. Alongside the ore-based route, the plant runs an electric arc furnace that melts scrap and other metallics. The liquid steel is solidified into semi-finished shapes by continuous casting. The plant has a crude steel capacity of about 6.3 million tonnes per year.
Process Route
Timeline
Operating since 1946
Emissions
2025
8.00 Mt CO₂e
1.79 t CO₂e per tonne of steel
Typical BF-BOF route: 1.8–2.0 t/t
Modelled estimate (Climate TRACE), not reported data. Methodology
Capacity (ttpa)
Crude Steel
6,251
EAF
500
BOF
5,751
Blast Furnace
5,580
Sinter
6,930
Coking
1,680
Production
Crude steelproduction, GEM-compiled (Global Iron & Steel Tracker). Dashed line shows nominal capacity.
Iron Units
Steel Units
Inputs & Energy
Power CSN owns two hydroelectric plants (Ita and Igarapava) and a thermoelectric plant in Volta Redondo
Iron ore Casa de Pedra mine, Congonhas, Brazil
Steel Products
shapes, galvanized, wire rod, rebar, cold rolled, hot rolled, slab
Ownership
Owner Companhia Siderúrgica Nacional SA
Parent Companhia Siderúrgica Nacional SA [100.0%]
Workforce 15,518 employees
Country Context
Brazil crude steel production (USGS). Plant line shows nominal capacity, not output.
Learn the processes this plant uses
Nearby Plants
Other Companhia Siderúrgica Nacional SA plants
Explore
Location
Volta Redonda
Central & South America
Brazil
-22.5126°, -44.1129°
At a Glance
- Route
- BF–BOF Integrated
- Crude steel capacity
- 6,251 ttpa
- Commissioned
- 1946
- Products
- Semi-finished, finished rolled
- Certifications
- 1 recorded