Abstract: A method of recovering magnetite from bauxite residue, comprising reducing the pH of the bauxite residue to form a treated bauxite residue, drying the treated bauxite residue, adding to and mixing into the treated bauxite residue a solid source of carbon, to create a mixture, heating the mixture to a reduction temperature of at least 800° C. in a reducing reactor to produce a reduced bauxite residue in which a major portion of Fe2O3 present in the treated bauxite residue has been converted to Fe3O4, exposing the reduced bauxite residue to a particle separation step, and then separating the reduced bauxite residue into an iron-enriched portion and an iron-depleted portion.

Abstract: 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.

Abstract: Disclosed are a method and apparatus for treating oil-containing particulates such as mill sludge comprising applying a treatment solution to a particulate feed stream to form a treated slurry, applying a mechanical disrupter to the treated slurry to reduce an average particulate size, applying a magnetic separator to the treated slurry to form a ferrous slurry, and applying a thermal separator to the ferrous slurry to extract a hydrocarbon portion and produce a ferrous product stream. This basic method and the associated apparatus may be modified in a number of ways including, for example, applying a sizing operation to the oil-containing particulates to remove larger particles from the particulate feed stream, condensing a volume of the hydrocarbon portion or using magnetic separators of varying strength to provide ferrous slurries of varying ferrous content.

Abstract: A composition suitable for application to the skin comprising lanolin, an oil, an anti-oxidant, and a combination thereof. The composition is suitable for particular application to a human breast.