A method of reducing entrained aluminum oxides in aluminum castings. The method comprises preheating a furnace charge to remove moisture and contaminants. The furnace charge is then coated on all free surfaces with a layer of flux. Subsequently the furnace charge is melted in a furnace to form a melt bath of liquid aluminum suitable for casting. The flux layer removes the naturally occurring oxide film from the furnace charge surface as well as provides a cover flux to protect the melt bath from oxidation.

A bauxite processing method including: preliminarily grinding bauxites; mixing the bauxites as ground with magnetic field treated water into a pulp; exposing the pulp in a reaction chamber to a rotating magnetic field created by rotating ferromagnetic elements, carried out in a vortex layer generated by ferromagnetic elements rotating at a speed of at least 2800 rpm, to achieve a magnetoelastic effect and provide forces and energies which enable metal reduction; and separating a resulting metal oxide mixture.

A bauxite processing method including: preliminarily grinding bauxites; mixing the bauxites as ground with magnetic field treated water into a pulp; exposing the pulp in a reaction chamber to a rotating magnetic field created by rotating ferromagnetic elements, carried out in a vortex layer generated by ferromagnetic elements rotating at a speed of at least 2800 rpm, to achieve a magnetoelastic effect and provide forces and energies which enable metal reduction; and separating a resulting metal oxide mixture.

A method for extracting aluminum according to one embodiment of the present disclosure comprises a hydrogenation reaction step of an aluminum (Al) alloy; a separation step of NaAlH.sub.4 generated from the hydrogenation reaction step; a dehydrogenation reaction step of the NaAlH.sub.4; and a pure aluminum extraction step.

A method for extracting aluminum according to one embodiment of the present disclosure comprises a hydrogenation reaction step of an aluminum (Al) alloy; a separation step of NaAlH.sub.4 generated from the hydrogenation reaction step; a dehydrogenation reaction step of the NaAlH.sub.4; and a pure aluminum extraction step.