Estudo do impacto do tamanho das partículas na separação magnética à seco da ilmenite no circuito b da planta de separação mineral da Kenmare

Abstract

Mozambique is a country rich in heavy minerals such as ilmenite, rutile and zircon. with mining projects such as Moma by Kenmare Resources. Resources. Between 2021 and 2023, Kenmare exported 2.7 million tonnes of ilmenite. ilmenite, with a forecast of reaching 4 million tonnes by 2026. This exploration is driving economic development, attracting foreign investment and generating significant employment. The main focus of this work is to investigate the influence of contaminants on the magnetic susceptibility of ilmenite in different particle sizes. the methodology used comprised particle size analysis, electrostatic separation and magnetic and magnetic separation to achieve the desired objectives. The analysis revealed that the highest concentration of material is found between the sieves with an aperture of -212+180µm with a mass concentration of 23 per cent. electrostatic separation proved to be inefficient in separating monazite from ilmenite and from rutile in particles with smaller diameters (90, 106 and 125) µm and it was observed that the size of the particle size influences the magnetic separation, affecting the removal of the contaminants contaminants (monazite and chromite). The analysis shows that particles of particles, there is a lower separation efficiency of the contaminants in the ilmenite and in fine-grained particles, higher separation efficiency for both contaminants. both contaminants. In monazite, the highest separation efficiency was found in the sizes of (90, 106 and 125) µm and lower separation efficiency in the coarse sizes of (150, 180, 212, 250 and 300) µm and for chromite (Cr2O3) there was lower separation efficiency separation efficiency in coarse particle sizes (150, 180, 212, 250 and 300) µm and higher separation efficiency for fine particles (106 and 125) µm. The study concludes that ilmenite contaminants (monazite and chromite), are separated efficiently in fine-grained particles, specifically in the 90, 106 and 125 sizes of 90, 106 and 125 µm.(TRADUÇÃO NOSSA)