The principle of the method specified is determination of swelling of fired iron ore pellets of a specified size range under isothermal reduction, determination of the volume of pellets before and after reduction at a temperature of 900 °C, using a reducing gas consisting of carbon monoxide and nitrogen, calculation of the free-swelling index, expressed as a percentage, using the difference between the two volumes.
Status: WithdrawnPublication date: 1994-01
Edition: 1Number of pages: 13
Technical Committee: ISO/TC 102/SC 3 Physical testing
- ICS :
- 73.060.10 Iron ores
ISO 4698:1994Stage: 95.99
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