H. Kamran Haghighi 1,
D. Moradkhani 1, B. Sedaghat 2,*
1 Faculty of
Engineering, Zanjan University, Zanjan, Iran.
2 R&D Center,
Research and Engineering Co. for Non-ferrous Metals (RECo), Zanjan, Iran
study, maximum recovery of zinc and minimum recovery of iron from shaking table
residue has been investigated. The residue is discarded as tailing of shaking
table Tajkooh processing zinc–lead carbonate ores. The zinc plant residue
containing 14.67% Zn, 5.93% Pb, and 10.47% Fe was blended with H2SO4. The
orthogonal array L9 (34) comprising four parameters at three levels was chosen.
The parameters and their levels were as: pH : 1, 1.5 and 2; time : 30, 45 and
60 min; temperature : 40, 60 and 80 ºC; and solid/liquid ratio: 1:4, 1:6 and
1:8. The ultimate optimum leaching conditions were found to be Temperature :80
ºC , solid/liquid ratio : 1:8, time : 60 min and pH=1. Under these conditions,
recovery for zinc and iron was 83.5% and 1.3%, respectively. It was observed
that the leaching rate of zinc increased with increasing temperature and time
and decreasing pH without influence of S/L.
words : Zinc, Iron, Leaching, Design Expert software.
conference, Turkey 2011.