Effect of Organic on Zinc Electrowinning from Sulphate Solution Made of Zinc Oxide

Several types of orgarnic were added in sulphate solutions made of pure zinc sulphate and/or zinc oxide from zinc plant to simulate the zinc electrowinning process SEM, metallographic and electrochemical examinations wer carried out to investigate the effect of organic on current efficiency and zinc deposit. It is verified that organic existing in zinc oxide plays an important role in decreasing the current efficiency and deteriorating crystal struture of zinc deposit. Feasible method for weakening thes effect has been developed and a high current efficiency of 85% is achieved.