COMPREHENSIVE PROCESS FOR RECLAIMING METALLIC COPPER FROM HIGH-GRADE FURNACE SLAG CONTAINING COPPER

摘要

Disclosed is a comprehensive process for reclaiming metallic copper from high-grade furnace slag containing copper, the process flow thereof being: grinding and classifying the copper furnace slag, returning the settled sands obtained by classification back to a ball mill, and sending the classified overflow pulp into a flotation machine group for flotation to obtain a concentrate II, where a screening procedure by a high frequency vibrating screen is added before the ball milled furnace slag enters a classifier, with the screened fine particles sent into the classifier and the screened rough particles sent into magnetic separation, after which a copper concentrate I is obtained; sending magnetic minerals after the magnetic separation back for grinding; magnetically separating the tailings floated through the flotation machine again, after which non-magnetic minerals are sent into a gravity dressing equipment for gravitational segregation to obtain a semi-qualified product, which is then sent to a shaker for refinement to obtain a copper concentrate III; and sending the unqualified product of the shaker back to the gravity dressing equipment, from which the tailings are discharged. The present invention solves the problems that the conventional grinding-flotation process is unsuitable for reclaiming metallic copper from high-grade furnace slag, has a poor reclamation index, and serious copper metal loss; therefore the method is especially suitable for the reclamation of high-grade furnace slag containing copper.