Roasted Iron Pyrites

Roasted iron pyrites (260120) are the oxidized residue of pyrite combustion, produced as a byproduct of sulfuric acid manufacture, and are classified separately from beneficiated iron ore concentrates (260111). The key distinguishing factor is the thermal treatment: if the material has been roasted to remove sulfur, it belongs in 260120 regardless of its iron content. Supporting documentation such as a production process certificate helps establish correct classification at entry.

The primary end uses are as an iron-bearing raw material in Portland cement clinker production and as a feedstock for iron oxide pigment manufacture. Some steel producers have evaluated it as a supplementary iron unit, but its variable chemistry and trace sulfur content typically limit its role to lower-value applications compared with standard iron ore concentrates.