Investigation of iron ore particle size and shape on green pellet quality

Pelletization and sintering of New Zealand titanomagnetite ironsand

“…which are largely dependent on the particle size distribution of the iron ore concentrate, moisture content, and wettability of the particles [34]. However, it has been shown that in the presence of a binder, the dominant bonding mechanism comes from the viscous forces of the binder [35].…”

“…These NZ TTM ironsand particles have a spheroidal shape and smooth surface, which could present difficulties in agglomeration [26]. It has been reported that particles with rougher surfaces and less circular shape result in higher pellet strength due to increased capillary forces and wettability [34]. This could mean that stronger binders are required at higher doses to bond the particles of NZ TTM ironsand.…”

“…and Patra et al both showed that increasing the fineness of iron ore particles resulted in the increase of interparticle forces and strength of green pellets [34], [44]. Patra et al reported that the highest strength was achieved with pellets containing hematite ore of <44 µm particle size [44].…”

Effect of Magnetite Concentrate Particle Size on Pellet Oxidation Roasting Process and Compressive Strength

“…Considering the economic benefit and resource conditions, majority of pelletizing plants in China produced the pellets using high-silicon magnetite concentrate (SiO 2 > 4%) with relative coarse particle size, which contribute to a poor quality compared with the abroad pellets due to its uneven particle sizes distribution and poor pelletizing ability. Although a certain degree of researches on particle sizes of the magnetite concentrates have been carried out to determine the relation between the pelletizing parameters and the quality of green pellets and thereby evaluate whether the size distribution is appropriate, 9,10) fewer studies have been conducted the effect of particle sizes and SiO 2 on the synergistic mechanism of oxidative consolidation in iron ore concentrates. It has been shown that particle size has an important influence on the oxidation behavior of iron ore concentrates.…”