Аннотация
The article presents results of thermodynamic modeling of Fe-Si-Al complex containing alloy of the silica clay (77.8 % Al 2 O 3 , 11.6 % Al 2 O 3 ).The modeling is based on the principle of minimum Gibbs energy and fulfilled by means of software complex HSC-5.1.It was found that the joint reduction of silicon and aluminum from an amorphous SiO 2 and Al 2 O 3 is characterized by higher thermodynamic probability than from a mixture of a crystalline SiO 2 and Al 2 O 3 .At the silicon reduction there is the undesirable formation of a gaseous SiO; the transition degree of silicon in SiO can be reduced by means of decrease in temperature and increase in carbon content.