8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Basic characteristics of forsterite were systematically studied by chemical analysis, XRD, SEM-EDS. A series of experiments were performed to investigate the effect of forsterite fineness on pellets strength and porosity by changing pre-grinding time of olivine. It could be found that prolong the pre-treatment time of forsterite is beneficial to the promotion of pellets strength; there are two kinds of pores in the roasted pellets, which are large circular pores and intergranular pores. With the increase of the pre-grinding time, the shape and distribution of large circular pores become uniform, pore size and quantity of intergranular pores become small, thus pellets compressive strength increases firstly and then decreases slowly, porosity changes in the opposite direction. Optimal pre-grinding time of forsterite is 40~60min, under which condition could the pellets meet requirements of actual production.