ISO 501:2012 PDF Download

A method for calculating the crucible swelling number (CSN) of hard coal is described in ISO 501:2012. When coal is heated in a covered crucible, its swelling characteristics are measured by the CSN. This standard offers a trustworthy and repeatable way for evaluating the swelling behavior of hard coal, which is helpful for figuring out whether it is appropriate for different uses.

The free swelling index (FSI), commonly referred to as the CSN, is a crucial factor in the study of coal. It is used to evaluate the coal's coking properties, which are essential for producing coke for steelmaking. In order to calculate the CSN value, a sample of coal is heated in a covered crucible, and the volume of coke that is formed is then measured.