DIRECT FLOTATION OF KOOHBANAN LEAD-ZINC OXIDE ORES

摘要

A lead-zinc oxide ore sample containing 18.59% Pb, 1.81% Zn, and 32.34% Fe taken fromrnKoohbanan deposit, Koohbanan, Kerman-Iran was used for this experimental study. The studiesrnconcentrated on lead oxide mineral flotation. Various parameters such as the flotation rate constant,rnreagent dosages, the effect of using promoters on flotation rate, the effect of slimes on flotation efficiency,rnand concentrate cleaning time were investigated in relation to the metal contents of concentrate andrnflotation efficiency. Experiments were carried out with 500 g/t Na_2SiO_3 as slime dispersant, 9,500 g/trnNa_2S, 600 g/t potassium amyl xanthate (KAX), and 20 g/t methyl isobutyl carbinol (MIBC) frother. A leadrnconcentrate with 72.3% Pb was produced with 73% recovery as a result of four stage rougher flotation andrn4.5 minutes cleaning. Using promoters such as AERO~? 404 or AERO~? 407 in combination with KAX hadrnno positive effects on the outcomes. More than 90% of zinc remained in the flotation tailing duringrnexperiments.