| http://www.w3.org/ns/prov#value | - , copper or other heavy metal, recover/processing, iron and steel production including blast furnace or BOP or BOF flue dust containing 3-20% zinc and heavy metal content, Jarosite from mining extraction operations, waste water treatment metal bearing sludges or cakes, zinc ferrite tailings, EAF dust containing 10-60% or more zinc, zinc/copper smelter dust, iron ore containing greater than 5% zinc
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