Publikuar
The method is based on decomposition of the test portion by 1) sintering with sodium peroxide and treatment with hydrochloric and perchloric acids and treatment with dilute nitric acid, or 2) treatment with hydrochloric, nitric and perchloric acids, evaporation, filtration of silica with any residue, fusion with sodium carbonate and dissolution in hydrochloric and perchloric acids, in both cases evaporation of the solution, filtration of the precipitated silica, ignition, and weighing, treatment of the ignited residue with hydrofluoric and sulfuric acid, ignition, and reweighing. Applies to silicon contents between 1 % and 15 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products.
WITHDRAWN
ISO 2598:1980
PUBLISHED
ISO 2598-1:1992
90.93
Standard confirmed
24 qer 2022
Minerale hekuri - Përcaktimi i përmbajtjes së silicit - Pjesa 1: Metodat gravimetrike
60.60 Standard published
English