A NEW FLOW-SHEET SELECTIVE LEAD – COLLECTIVE LEAD .Mining Institute, Department of Mineral Processing., Skopje, R. of Macedonia, E-mail: b_fidancevyahoo. Marin Aleksandrov . C.- Alternative Flow-sheet for a selective lead and zinc, selective lead - collective lead-zinc, and collective lead- zinc flotation (neded for . Mine, with the concentrator plant (1-st section and.lead zinc beneficiation plant flow sheet,How to Process Low-Grade Lead Zinc Ore by FlotationMar 19, 2017 . The flowsheet above was designed to treat economically approximately 200 tons in 24 hours of a low-grade dump ore containing lead and zinc values as . Because of the variations in the flow sheets of gravity concentration plants, it is impossible to indicate the points at which the different reagents should.