PROCEDURE FOR EXTRACTION OF MAGNESIUM OUT OF WASTES OF FOUNDRY CONVEYOR Russian patent published in 2010 - IPC C22B26/22 C22B7/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to procedure for extraction of magnesium out of wastes produced at magnesium casting on foundry conveyor. The procedure consists in crucible melt of wastes in flux medium containing magnesium, sodium and potassium chlorides. After melt magnesium is settled, tapped and treated with calcium fluoride. Also as flux, there is used electrolyte of electrolytic cells for production of magnesium with carnallite feeding circuit; carnallite is heavier, than liquid magnesium at 0.03-0.05 g/cm³ and contains 5-15% of MgCl₂, 18-20% of NaCl, 0.1-0.3% of F, KCl - the rest. Melt is carried out at ratio electrolyte - wastes: (0.7-1.5):1 at the temperature 700-730°C, also bottom layers are stirred-up manually. The rest of melt upon magnesium tapping is treated with calcium fluoride at manual mixing. Upon treatment magnesium is settled and tapped.

EFFECT: increased extraction of magnesium from wastes produced at magnesium tapping at foundry conveyor and simplification of salt medium composition.

1 tbl, 1 ex