Apilot scale canister which encapsulates the cyclones used by Zincor in the cobalt removal stage of its roast-leach-electrowinning zinc circuit, has been successfully installed, The pilot scale unit comprises six cyclones of 40 mm diameter which were installed in a closed canister on the No. 1 tank for evaluation, The unit was rated for a flow rate of 26 m~3/h. Seeding is an importantfeature of this circuit, as this ensures optimal consumption of zinc dust while enhancing reaction kinetics, But the current method of seeding is inefficient as it overloads the filter presses with a large circulating load of solids.
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