JIS M 8720:2009 PDF Download

A method for calculating the low-temperature reduction and disintegration of iron ores is provided by the JIS M 8720:2009 standard. With this technique, iron ores are reduced in a fixed bed at 550°C, tumbled in a tumble drum at room temperature, and then their size degradation is measured. The goal is to mimic the environment found in a blast furnace's low-temperature reduction zone.

The term "sized ores" refers to naturally occurring iron ores, and iron ore aggregates like pellets and sinter also fall under this criteria. It offers a comparative way to gauge the degree of size deterioration that takes place throughout the low-temperature reduction process.

It is important to note that the JIS M 8720:2009 standard has a counterpart in the International Standard, ISO 4696-2:2007, which describes a technique for calculating the low-temperature reduction-disintegration indices using a static approach with CO and N2 gases.