Resumen
The method is based on decomposition of the test portion by fusion with sodium tetraborate and treatment with dilute nitric acid, addition of ammonium molybdate to convert silicate into a molybdatosilicate complex, reduction to molybdenum blue with ascorbic acid, and spectrophotometric measurement of the absorbance of the molybdenum blue complex at a wavelength of approximately 600 nm. Applies to silicon contents between 0,1 % and 5,0 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products, especially for ores containing fluorine.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1992-12Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 8
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Comité Técnico :ISO/TC 102/SC 2ICS :73.060.10
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Ciclo de vida
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Anteriormente
RetiradaISO 4686:1980
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Ahora