Fluorescent X-ray Analysis of Iron Content in Iron Ores

Abstract

There has been problems on fluorescent X-ray analysis of iron contents in iron ores. It is the most important problem that the working curves of iron are different depending on the type of ore, such as hematite (Fe₂O₃), magnetite (Fe₃O₄), goethite (Fe₂O₃·H₂O) and limonite (Fe₂O₃·nH₂O), A theoretical calculation has revealed the reason for this effect. In the calculation, oxygen is considered an coexistent element and it is shown that the difference in coexistent elements cause the difference in Fekα fluorescent X-ray intensity of the same weight fraction of iron for various types of ore.
Theoretical calculation were applied to the several types of ores and impurities and experimental results agreed well with the theoretical results.
Theoretical correction method, interval standard correction method, and the dilution method with borax fusion and acid solution are also discussed theoretically.