ISO 2598-1:1992 PDF Download

The gravimetric method for figuring out the silicon content in iron ores is described in ISO 2598-1:1992. The strategy entails breaking down the test component into two distinct processes. First, sodium peroxide is used to sinter the material, then it is subjected to treatments with perchloric and hydrochloric acids, and finally it is subjected to a diluted nitric acid treatment. The second technique comprises treating the material with hydrochloric, nitric, and perchloric acids, followed by evaporation, filtration of the silica to remove any leftover material, fusing with sodium carbonate, and dissolution in hydrochloric and perchloric acids.

The solution is evaporated after the breakdown process, and the precipitated silica is then filtered, set on fire, and weighed. After being treated with hydrofluoric and sulfuric acids, the ignited residue is then reweighed and ignited once more. This process can be used with iron ores, iron ore concentrates, and agglomerates, including sinter products, that contain anywhere between 1% and 15% silicon.