| http://www.w3.org/ns/prov#value | - A method for removing one or more undesirable generally toxic metals including at least one of zinc, lead, and cadmium from an iron-containing material, said methodcomprising:sintering said iron-containing material producing at least one sinter mass and sinter flue gas;crushing such sinter mass into oxidized sinter lumps for handling;preheating said sinter lumps in a non-reducing atmosphere, if ne
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