| 摘要 |
A method of recovering magnetite from bauxite residue (62), comprising reducing the pH (63) of the bauxite residue (62) to form a treated bauxite residue, drying (64) the treated bauxite residue, adding to and mixing into (65) the treated bauxite residue a solid source of carbon (66), to create a mixture, heating the mixture to a reduction temperature of at least 800° C in a reducing reactor (67) to produce a reduced bauxite residue in which a major portion of Fe203 present in the treated bauxite residue has been converted to Fe304 exposing the reduced bauxite residue to a particle separation step (71), and then separating (72) the reduced bauxite residue into an iron-enriched portion (73) and an iron- depleted portion (74). |
