BS 7020-5.1:1993

This standard BS 7020-5.1:1993 Analysis of iron ores. Methods for the determination of silicon content is classified in these ICS categories:

• 73.060.10 Iron ores

This part of ISO 2598 specifies two gravimetric methods for the determination of the silicon content of iron ores.

These methods are applicable, with certain limitations, to silicon contents between 1 % (m/m) and 15 % (m/m) in natural iron ores, iron ore concentrates and agglomerates, including sinter products.

Method 1 is not applicable to iron ores having a content of reducing agents greater than 2 % (m/m), for instance pyrite, or to ores having a fluorine content greater than 0,1 % (m/m). It is recommended for lower grade ores having a high content of amphoteric elements.

Method 2 can be used for ores having a fluorine content greater than 0,1 % (m/m). It is recommended for high grade ores having a low content of gangue.

NOTE 1 For ores having a silicon content less than 5 % (m/m), the method specified in ISO 2598-2:–¹⁾, Iron ores – Determination of silicon content – Part 2: Reduced molybdosilicate spectrophotometric method, is preferable.

Two methods for the determination of silicon contents between 1% (m/m) and 15% (m/m) (with certain limitations) of iron ores.