particle separation in bauxite waste magnetite recovery method

摘要

a method of recovering magnetite from bauxite residue (62), comprising reducing ph (63) from bauxite residue (62) to form a treated bauxite residue, drying (64) the treated bauxite residue, adding Mixing (65) into the treated bauxite residue a solid carbon source (66), to create a mixture, heating the mixture to a reduction temperature of at least 800 ° C in a reduction reactor (67) to produce a residue. bauxite, in which a major part of fe2o3 present in the treated bauxite residue was converted to fe3o4 by exposing the reduced bauxite residue to a particle separation step (71), and then separating (72) the reduced bauxite residue into an iron-enriched part (73) and an exhausted iron part (74).