METHOD FOR OBTAINING ALUMINIUM-SCANDIUM ALLOY COMBINATION Russian patent published in 2014 - IPC C22C21/00 C22C1/03 C22C35/00 

FIELD: metallurgy.

SUBSTANCE: method for obtaining aluminium-scandium alloy combination involves aluminium melting, aluminothermic reduction of scandium from initial charge containing scandium fluoride, calcium chloride and sodium fluoride under cover flux and further exposure of the obtained molten metal. Prior to aluminothermic reduction the initial charge is placed into a melting pot and pre-heated to the temperature of 790°C, and then, it is added to molten aluminium and aluminothermic reduction is performed at the temperature of at least 830°C. After the molten metal exposure, separate pouring of salt and metal melt is performed. An initial charge containing the following component ratio, wt %, is used: scandium fluoride - 40-45; potassium chloride - 40-45; sodium fluoride is the rest. Pre-heating of the initial charge can be performed in a graphite melting pot pre-saturated with cryolite, or in a melting pot from glass carbon.

EFFECT: improvement of technological characteristics of charge; reducing volume of salts and increasing the yield of scandium to molten aluminium.

2 cl, 3 ex