METHOD FOR REPROCESSING SALT WASTE OF MAGNESIUM PRODUCTION Russian patent published in 2007 - IPC C22B7/00 

FIELD: non-ferrous metallurgy, in particular, production of magnesium by electrolysis of smelted salts, namely, reprocessing of salt wastes forming in process of preparation of chlorine-magnesium raw stock for magnesium production by electrolysis.

SUBSTANCE: method for reprocessing salt wastes of magnesium production includes milling original salt waste, opening waste by interaction with water, phase separation, selection of target products, drying of sedimentation with production of magnesium oxide and vaporization with production of concentrated solution of chlorides of metals, in which wastes are processed with water with mass ratio of wastes to water equal to 1: (3-5), at temperature not more than 40°C, solid sedimentation before drying is washed by water with ratio 1: (20-40). Also, vaporization of solution of metal chlorides is performed in immersed burning apparatus with following drying in boiling layer furnace.

EFFECT: increased yield of final product - magnesium oxide - from waste.

2 cl, 1 ex