METHOD OF CHARGE PREPARATION IN ALUMINA PRODUCTION Russian patent published in 2016 - IPC C01F7/08 C01F7/38 C01F7/06 

FIELD: metallurgy.

SUBSTANCE: invention can be used in non-ferrous metallurgy for burden material preparation during production of alumina from low-quality aluminosilicate raw material. Method of charge preparation involves grinding aluminosilicate material on soda solution in mill, pulp hydrocycloning as per 0.25 mm grade, removal of hydraulic cyclone sands with particle size of more than 0.25 mm from process, hydraulic cyclone drain with particle size less than 0.25 mm on milling into mill operating in closed cycle with hydraulic cyclone, return of hydraulic cyclone sands with particle size of more than 0.063 mm to re-grinding in mill, direction of discharge with size less than 0.063 mm, which is finished product, to metallurgical processing.

EFFECT: method provides reducing power consumption for grinding and increased efficiency of concentrating and metallurgical devices and, consequently, reduced losses of valuable mineral components with slurries during aluminium-containing ores processing.

1 cl, 1 dwg