“…Since iron in red muds is present in both oxide and hydroxide forms, it is of scientific and technical interest to carry out processing taking into account phase transitions in a reducing medium. Many studies on waste recycling are aimed at developing disposal methods taking into account the multicomponent composition for obtaining various functional materials [12], such as building materials [13][14][15], paints and pigments [16], catalysts [17], sorbents [18] or selectively isolated oxides of titanium, aluminum, silicon and iron [19][20][21]. The most promising and effective, as well as reasonable from the point of view of solving environmental problems, is the direct reduction of some metals from oxides [22][23][24].…”