EFFICACY OF MULTI GRAVITY SEPARATOR FOR CONCENTRATING

The Multi-Gravity Separator (MGS) is novel enhanced gravity equipment for the separation ultra-fine minerals. The present investigation studied on the effects of different process variables on the performance of a multi-gravity separator for concentration of ultra-fine ferruginous chromite. The results revealed that, shake amplitude and wash water flow rate play a dominant role in controlling the grade (%Cr2O3) of the concentrate fraction whereas tilt angle and drum speed influence much on the recovery (%Cr2O3) of the concentrate fraction. It was found that the MGS could produce a concentrate of 45.69 % Cr2O3 with 56.41 % recovery from a feed assaying 21.06 % Cr2O3 and 23.02 % of Fe(T). In addition to this, optimized conditions were determined for producing metallurgical grade chromite concentrate (>40 % Cr2O3) with 60% recovery. Different correlations were made for predicting the silica and iron content of the concentrate fraction