Benefisiasi Bijih Kromit Daerah Paludda Dengan Metode Konsentrasi Gravitasi

Abstract

Chromite ore is an iron chromium oxide mineral with the chemical formula FeCr 2 O 4 . The dominant chromite ore mined is utilized for the manufacture of ferrochrome, the rest for refractories and paint materials. The Palludda Barru area contains chromite ore with low grade or cannot be utilized further. A suitable concentration method for processing chromite ore is the gravity concentration method, one of which is a shaking table. The research was conducted with the aim to determine the amount of increase in grade and recovery of chromite ore from Palludda Barru using shaking table gravity concentration. Samples from the Palludda Barru field were first characterized to determine the minerals and the levels of minerals or elements contained in the chromite ore. The ore before being fed, was reduced in size using a jaw crusher and ball mill. Experiments were conducted by varying the table inclination angle from 5° to 15°. The results showed that the inclination angle affected the Cr content and recovery obtained. The optimum tilt angle was obtained at 10° with a grade of 35.89% and a recovery of 59.06%.