METHOD FOR ALUMINOTHERMIC OBTAINMENT OF FERROALLOYS Russian patent published in 2015 - IPC C22C33/04 C22B5/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to the production of ferroalloys - ferrochrome and ferrotitanium. The method involves mixing of powders of initial components of a charge containing an ore concentrate and aluminium as a reducing agent, initiation of the combustion process, mechanical separation of the obtained cast ferroalloy from slags. An oxidiser in an amount of not more than 15 wt % is additionally added to the charge; an alkali metal perchlorate is used as the oxidiser, and to the composition of the reducing agent there added is not more than 15 wt % of magnesium or alloy of aluminium with magnesium in the amount sufficient for the complete reduction of oxides from ore concentrates; with that, the total content of the reducing agent in the charge is not more than 30 wt %; the charge is arranged in a capacity made from graphite or boron nitride; initiation of the combustion process in the air is performed by means of a tungsten spiral.

EFFECT: invention allows reducing power consumption at high efficiency of the process; prime cost and time required for the process at the maintenance of a high degree of extraction and purity of the target product.

3 cl, 1 tbl