| http://www.w3.org/ns/prov#value | - ; Joseph B.Calcium chloride, hydrochloric acid mixture with flue dust, oxidation of metals, mixing with hematite, complexing, filtration and recovering metal oxides such as zinc oxides, circulation and demetallizationUS5738717Feb 11, 1994Apr 14, 1998Corveagh LimitedSynthetic magnetite produced by oxidation of ferrous mill scaleUS5792250Jun 3, 1997Aug 11, 1998Bayer AktiengesellschaftPrecipitation o
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