Nickel Coins
Nickel Coins are electrolytic nickel cathodes produced in a special shape, which were specially developed for galvanoplasty applications.
With a round shape, "coins" provide better seating and fluidity in titanium baskets, especially those used at greater depth. Their shape also minimizes risks associated with handling.
| 5 plastic bags of 5 kg |
| in cardboard boxes | |
| Diameter |
approx. 25 mm |
| Thickness |
8 a 12 mm | |
| Ni |
> 99.900% |
| Co |
< 0.0350% |
| Fe |
< 0.0070% |
| S |
< 0.0050% |
| Cu |
< 0.0015% |
| Pb |
< 0.0015% |
| Cd |
< 0.0010% |
| P |
< 0.0010% |
| Si |
< 0.0010% |
| Zn |
< 0.0005% |
| Mn |
< 0.0002% |
| Mg |
< 0,0001% |
| O2 |
< 0,0050% |
| N2 |
< 0,0010% |
| H2 |
< 0.0002% | |
Sulfuric Acid
The fusion of nickel concentrate performed in the Fortaleza de Minas unit releases SO2 gas, which is converted to sulfuric acid in an acid plant.
Produced in liquid form and sold on the domestic market, sulfuric acid is widely used in the chemical, sugar, and fertilizer industries.
With a production capacity of 120 thousand metric tons per year, the Fortaleza de Minas unit provides acid mainly to the region of Ribeirão Preto.
| Granules in 25,000 kg tankers | |
| [H2SO4] |
98,0 ± 0,5% |
| Density |
Min 1.833 g/ml @ 20 oC | |
| Fe |
ppm |
Max 50,0 |
| Res F |
ppm |
Max 2.000 |
| Pb |
ppm |
ND |
| As |
ppm |
ND |
| F- |
ppm |
Max 20 |
| Mn |
ppm |
Max 1,5 |
| Ca |
ppm |
Max 25 |
| Mn |
ppm |
Max 1,5 |
| Ca |
ppm |
Max 25 |
| Sb |
ppm |
ND |
| Co |
ppm |
ND |
| Se |
ppm |
ND |
| Cr |
ppm |
Max 3,0 |
| Ni |
ppm |
Max 2,0 |
| Cu |
ppm |
Max 1,0 | |