Technologies for Treatment of Zinc-Containing Waste from Metallurgy in KCM AD

摘要

The zinc plant in KCM AD started in 1961. The current annual capacity of the plant is 75,000 tons of zinc. The technological scheme is classic-Roasting, Leaching, and Electrowinning. Hydroxide cakes, generated during the leaching, are treated in the Waelz plant. In the period 2009-2011, different options for development of the company were considered with the main goals being increasing the profitability and competitiveness and minimizing quantity of the wastes for landfill. KCM decided to invest with priority in increasing the capacity of the Waelz kilns and realizing a technological line for treatment of zinc-containing secondary materials and wastes, mainly EAF dusts and lead slag from the lead plant. With the realized investments and implemented technologies, the share of treated secondary materials and wastes reached 25% of the total zinc plant input, including 10% EAFD. The circle of the recycles and residues between the two plants in KCM was closed.