Microwave treatment of magnetite iron ore pellets to convert magnetite to hematite
AssigneeOre Pro PTY Ltd.
InventorPaul Frank Rundel
Life of this patent
Estimating the term…
Abstract
A method and apparatus for producing iron ore pellets containing hematite is described. The pellets containing magnetite are exposed to microwave energy in a heat treatment furnace under oxidizing conditions to convert magnetite to hematite.
Claims24
A method for producing hematite iron ore pellets by exposing green pellets containing magnetite to microwave energy in a heat treatment apparatus under oxidizing conditions to convert the magnetite to hematite, wherein microwave energy is supplied to an oxidation zone via a first waveguide and microwave energy is supplied to a curing zone via a second waveguide and the level of microwave energy supplied to the curing zone is different from the level of microwave energy supplied to the oxidation zone.
Dependencies are inferred from the claim text.