Status : Published (Under review)

This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
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Abstract

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.

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General information

  • Status
     : Published
    Publication date
     : 1992-12
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 8
  • Technical Committee :
    ISO/TC 102/SC 2
    ICS :
    73.060.10 
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