scope:

This Standard specifies a method to provide a relative measure for evaluating the degree of size degradation of iron ores when reduced in a fixed bed at the temperature of 550°C and then tumbled in a tumble drum at room temperature, under conditions resembling those prevailing in the low-temperature reduction zone of a blast furnace.

This Standard is applicable to natural iron ores (hereafter referred to as "sized ores") and iron ore agglomerates [hot-bonded pellets (hereafter referred to as "pellets") and sinter ].

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows :

ISO 4696-2 : 2007 Iron ores for blast furnace feed-stocks - Determination of low-temperature reduction-disintegration indices by static method - Part 2: Reduction with CO and N₂ (MOD)

The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.