Abstract

The compositions of the calcium aluminosilicatoferrite phases in commercial iron-ore sinters, which are solid solutions based on CaFe4O7, CaFe2O4, and Ca2Fe2O5 ferrites of the CaO-Fe2O3 system, are studied. The sequence of the formation of the calcium aluminosilicatoferrites and their compositions with Ca2SiO4 and Ca3SiO5 silicates in sinters is found to be analogous to the crystallization of the ferrite and silicate phases in the ternary CaO-SiO2-Fe2O3 system. This allows the phase diagram of this system to be used for the explanation of the formation of the mineral binder compositions for ore grains during sintering of commercial superfluxed sinters.

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