Normally P80 around 45µm and P100 around 100µm is best suitable PSD for pelletization for India Iron ore. But due to fragile ore the same could not be achieved during grinding and resulted in over grinding (more ultrafine).
This high ultrafine has adverse effect on Filtration and also increase plasticity during green ball formation and reduce porosity in pellet. In order to have efficient filtration process, need to curtail ultra fines generation in mills & achieve PSD (P50-44µm, P80-102µm, P100-286µm) to avoid over grinding.
So, what shall be the PSD (means less ultrafine and high coarse particles) suitable for Green balling and pelletization?
Kalpesh Meghani
According to theory, the smaller the particles, the better they aggregate, i.e. granulate. But in such granules, the particles are weakly bound. At the Kursk plant, a disk granulator is used for granulation to mix iron ore powder with binders (such as bentonite and quicklime) to form homogeneous granules, ideal for obtaining fine concentrates.
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