The Electrowinning of Dilute Zinc Sulfate Solutions in a Fluidized Bed Electrochemical Reactor.
Hydromet Reac Design & Kin Proc Met Soc Ann Meet New Orleans Louisiana 3/2-6/86 Contract #G1125132-1902 :15 pages
This report describes the use of a cylindrical, fluidized-bed electrochemical reactor (fber) to electrowin dilute zinc sulfate solutions containing 2.5 to 15 g/l zinc. The planar electrodes used in the industrial electrowinning of zinc requires 50 to 65 g/l zinc. A low acid catholyte solution of 5 g/l is the maximum concentration necessary for the efficient recovery of zinc. The addition of 60 g/l of na2so4 electrolyte improved both the catholyte conductivity and current efficiency. The optimum current efficiency and current density were obtained using a particle size of minus 500 plus 355 um and a bed width of 1.3 Cm. At a zinc concentration of 15 g/l, the fber could be operated at current densities and volumetric reaction rates greatly exceeding that of a conventional planar electrowinning cell.
Hydromet Reac Design & Kin, Proc Met Soc Ann Meet, New Orleans, Louisiana, 3/2-6/86; Contract #G1125132-1902
Univ NV--Reno & Ia State Univ