Thermodynamical calculations with “Terra” program of interaction between perovskite and titano-ferrite with carbon under the conditions of atmosphere pressure and vacuum have been realized. The results was collated, and the dual-stadiality of the process of perovskite reduction with obtaining calcium stream and low titanium oxide has been determined. Experimental data of vacuum-thermal perovskite reduction has been also presented, dual-stadiality of the process has been defined.

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