No abstract

No abstract

No abstract

The applicability of centrifugal force multigravity separator (MGS) to concentrate fine fractions (20?1 mm) of a low grade chromite ore assaying 9?3%Cr 2 O 3 was investigated. The metal screen analysis revealed that 83?92% of the material prepared for tests was in the z0?106 mm fraction containing 8%Cr 2 O 3 and that 16?08% was in the 20?106 mm size fraction containing 16?12%Cr 2 O 3 . The z0?1 and 20?1 mm fractions of the ore was used as feed for shaking table and MGS tests respectively. The results gathered from shaking table test were not satisfactory due to low Cr 2 O 3 recoveries. However, a chromite concentrate with 46?22%Cr 2 O 3 grade and 66?1 wt-%Cr 2 O 3 recovery was obtained by the combination of shaking table and MGS. It was clearly demonstrated that MGS is an ideal beneficiation equipment for fine fractions of a low grade Cr 2 O 3 ore. Based on the experimental results, a principal flowsheet for the enrichment plant was proposed.