METHOD FOR PRODUCING HIGH-PURITY SYNTHETIC MAGNETITE BY OXIDATION FROM METAL WASTE AND APPLIANCE FOR PRODUCING SAME

摘要

The invention relates to a method for producing magnetite with a purity of no less than 90% and higher than 98%, by oxidation of pulverized Wüstite (iron oxide), at temperatures ranging from 200°C to 800°C, with the addition of water in liquid or steam form, in counter-current or concurrently, in an externally heated reaction chamber with a controlled atmosphere. The amount of water used to oxidize the Wüstite being 60 to 500 ml per kilogram of Wüstite, the grains of Wüstite powder injected into the reaction chamber having a size no greater than 100µm for optimal reaction.