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Overview
The industrial co-products come from different stages of the steel production process. Part of these co-products are generated in the “Presidente Vargas” steel mill, which is located in “Volta Redonda – RJ”. They are recycled internally, returning to the production flow, while those who no longer serve to CSN are sold.
Zinc Sludge
Product Description:
Material generated during the galvanizing process of the steel in the galvanizing lines
Main applications: Raw material for zinc oxide production, for the production of rubber, micronutrients for the soil, animal feed and pharmaceutical industries.
Specifications:
Product with about 90% zinc (Zn).
Additional Information
Transport Information
Class NBR 10004: II-A
Vehicle type: DRY LOAD TRUCK
Customer Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Source: GVS Catalog
Galvalume Sludge
Product Description:
Material generated during the steel galvanizing process in the galvanizing lines at CSN Paraná
Specifications:
| Al(%) |
Fe(%) |
Si(%) |
Zn(%) |
| 49.03 |
7.81 |
2.67 |
40.49 |
Additional Information
Transport Information
Class NBR 10004: II-A
Vehicle type:
Customer Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Technical Opinion of receiving state
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Synthetic Iron Oxide
Product Description:
Material from the Acid Recovery Unit (ARU), derived from high granulometry stripping
Main applications: ferrite, sand blasting replacement, with the advantage of not causing silicosis problems; used as a counterbalance due to high density, and in composition of mortars.
Specifications:
| Compound (%) |
Fe2O3 |
Total Fe |
SiO2 |
MnO |
CaO |
Al2O3 |
| Average |
98.06 |
68.57 |
0.30 |
0.23 |
0.10 |
0.21 |
Additional Information
Transport Information
Class NBR 10004: II-A
Vehicle type: DUMP TRUCK
Customer Environmental Documentation:
LO- Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Red Iron Oxide
Product Description:
Material from the Acid Recovery Unit (ARU), derived from low granulometry stripping
Main applications: Water treatment
Specifications:
| Parameters |
Unit |
Analytical results |
| Superior Calorific Value |
kcal/kg |
171 |
| Iron % |
% p/p |
82.5 |
| Fe2O3 |
% p/p |
118 |
Additional Information
Transport Information
Class NBR 10004: II-B
Vehicle type: TRUCK
Customer Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Technical Opinion of receiving state
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Mill Scale
Product Description:
Material generated during the hot rolling processes; rich in iron and variable granulometry.
Specifications:
| Chemical analysis |
|
| Fet |
70,80 |
| SIO2 |
0.27 |
| AI2O3 |
0.16 |
| CaO |
0.09 |
| MgO |
0.02 |
| P |
0.0080 |
| Humidity |
2.8 |
| Oils / greases |
0.6 |
| Physical analysis |
|
| >6.35mm |
5.33 |
| >0.150mm |
81.74 |
| <0.150mm |
12.93 |
Additional Information
Transport Information
Class NBR 10004: II-A
Customer Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Blast Furnace Dust Collector
Product Description
Fine powder generated in a blast furnace system; rich in iron, manganese and lime oxide.
Specifications:
| Parameter |
Content (%) |
| CaO |
5.33 |
| MgO |
2.01 |
| Total Fe |
53.22 |
Additional Information
Transport Information
Class NBR 10004: II-A
Customer Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
Transporter Environmental Documentation:
LO – Operating License issued by the environmental control agency.
CTF – Federal Technical Registration at IBAMA.
RNTRC – National Registration of Cargo Road Transporters issued by ANTT.
Last update on
November 20, 2020.
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