| 摘要 |
<p>The presently disclosed methods utilize both physical and chemical processes by which the Fe2O3 (iron oxide) contained in undissolved bauxite residue (Red Mud) may be reduced to form Fe3O4 (magnetite) and/or elemental iron that is then separated from the treated residue for reuse and/or sale. The disclosed methods, when properly executed, are generally capable of extracting 80 to 90% of the iron (Fe) from the Red Mud as magnetite and/or iron. The magnetite, in particular, can then be used in industrial manufacturing applications including, for example, high-temperature composite materials, coatings, acrylic and oil-based paints, plastics and other polymer resins, as well as being used for coloring various types of metallic surfaces and is, therefore, the generally preferred product.</p> |
