Study of fluoroammonium processing of reduction smelting dusts from ilmenite concentrate

Abstract

The article presents the results of studies on the processing of fine waste dusts of electric smelting of ilmenite concentrates. The main silicon impurity was preliminarily removed from the dusts. The process of dust fluorination with titanium fluorides extraction is studied. The influence of temperature and time on sublimation degree of titanium fluorides was studied. The optimum conditions for sublimation of titanium fluorides were determined: T = 600 ± 10 °C, time - 2 hours. The extraction of titanium in sublimations was up to 99 %. The XRD method showed that phases of heptofluorotitanate, hexafluorosilicate and ammonium hexofluoroferrate are present in the sublimations. The impurity components of iron, manganese, chromium are sublimated at a sufficiently low degree during titanium fluorination.

Keywords

• ilmenite concentrate
• waste
• dust
• sublimation
• titanium fluoride