ABSTRACT
In this paper, the results of Multi Gravity Separator (MGS) upgrading tests on chromite gravity tailings of KOP concentrator are presented. Initial sample for the tests was about − 1 mm in size and showed a Cr2O3 content of 14.4 %. Metal/screen analysis proved that about 30 % of chromite was present in the size fraction of −106 microns. Under optimum operation conditions, a concentrate with 48 % Cr2O3 content and 70 % chromite yield for the size fraction of −100 microns and a concentrate with 42 % Cr2O3 and 76 % chromite yield for the size fraction of 100/150 microns, could be produced. The results of the MGS tests and the economical evaluation suggest that multi gravity separation of the KOP tailings is technically possible and economically viable. Based on the results of this study, it can be stated that MGS can be used as a fines recovery unit in KOP chromite concentration plant.
