Abstract: The research on coal-based reduction roasting-magnetic separation mineral processing is carried out on the basis of chemical analysis and X-ray diffraction analysis of the cyanidation slag. The effects of experimental conditions，such as the type and quality of reductant，roasting temperature and time were investigated. The results show that bituminous coal as the reductant was not only less than lignite，but better test indicator. When the slag was roasted at 750 ℃ for 60 min，followed by grinding to the fineness of -0.074 mm 90% and two-stage magnetic separation with the magnetic intensity of 149.6 kA/m，70.80% of the iron in the slag reduced by 18% bituminous coal was recovered as the product with 60% iron.

Key words: Cyanidation slag, Coal-based reduction-roasting, Magnetie separation