Rapid sample dissolution and determination of total iron in iron ore, sinter, concentrates and agglomerates

Abstract

A method is described for rapid and complete dissolution of iron ores with a wide range of composition in order to determine total iron. The sample is fused with a mixed flux of sodium carbonate and sodium peroxide in a vitreous carbon crucible and the melt is dissolved in hydrochloric acid. Iron is then determined by redox titration with dichromate. The wide range of composition of the samples for which the method can be used, as exemplified by results obtained for ISO, BCS and NBS reference standards, demonstrates its universal applicability. The method is rapid, free from tedious and timeconsuming manipulations, suitable for routine control and yields results comparable with those obtained by the referee method.