Stepwise Utilization Process to Recover Valuable Components from Copper Slag

Waste copper slag is a typical hazardous solid waste containing variety of valuable elements and has not been effectively disposed so far. In this paper, stepwise extraction process was proposed to recover (copper, iron, lead zinc) from slag. The specific procedures are as follows: (1) A flotation adopted enrich copper, when the grade in concentrate 21.50%, recovery rate 77.78%. (2) tailings were pelletized with limestone, then green pellets reduced, magnetic separation carried out. When iron grades 90.21% Fe 0.4% Cu, 91.34% 83.41% recovered, respectively. (3) Non-magnetic mixed clinker standard sand produce common Portland cement. Several products obtained through process: concentrate, measured 21.50% Cu; TFe direct reduction dust, including 65.17% ZnO 2.66% PbO; cement for building construction. comprehensive utilization method achieved zero tailing great potential practical application.