| Abstract Scope |
Particle size plays a fundamental role in the efficiency of iron ore separation and concentration processes, directly influencing the selection of beneficiation routes, metallurgical recovery, and operating costs. This paper presents a literature review on the influence of particle size in concentration processes, including gravity separation, magnetic separation, centrifugation, flotation, and mineral slurry dewatering. The review emphasizes the physical principles governing particle behavior, particularly that of fine and ultrafine particles, highlighting the effects of high specific surface area, interparticle forces, colloidal behavior, slurry rheology, and surface interactions on separation efficiency. The main limitations associated with these particle size fractions are discussed, including reduced selectivity, increased reagent consumption, and difficulties in solid–liquid separation, relating particle behavior to the mechanisms that control the performance of different iron ore beneficiation techniques. |