Improving grade of Indian chromite ores by high-gradient magnetic separation

Abstract

Investigations were carried out to improve the chromium-to-iron ratio of two off-grade chromite samples from Orissa, India, having different physical natures. The results of these investigations indicated that the chromium-to-iron ratio could be improved from 1.85 to 3.0 with around 10% to 30% recoveries by high-intensity magnetic separation of the washed ores. A common flowsheet is suggested for processing of these two ores.