Abstract
The Vitkovice plant belongs to the biggest metallurgical company and produces large amounts of the wastes that are mainly recycled, but the additives of the Cd, Zn and Pb arc undesirable in these wastes. Two types of wastes (oxyvite sludge and dust from electric-arc furnace) were tested and bacterial leaching with Thiobaci/lus ferrooxidans was applied. The better results were achieved at leaching of oxyvitc sludge, where these yields of Zn - 73%, Al - 70%, Pb - 30%, Cd - 90% were attained. The results from leaching of dust show lower yields of mentioned metals with comparison of oxyvite sludge.
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