Conditions for the reduction of titaniummagnetite concentrates (main components are Fe 52-54 % and TiO 2 5-7 %) by natural gas for obtaining iron powder and titanium fraction were studied. Based on the theory of granulation in the drum apparatus, granules with 25 % of soda fluxing additive with optimum diameter, humidity, strength and porosity were obtained. It was found that the reduction reactions in the temperature range of 1143-1198 K are carried out if a mixture of hydrogen and carbon monoxide is added to the natural gas in amount of 15 vol %. Block-diagrams for processing titaniummagnetite concentrates for the production of iron powder α-Fe (purity 99 %), anatase and rutile modifications of titanium dioxide (99 % TiO 2 ) and titanium with a purity of 99% are presented.
Моделировано формирование гранул из порошков титаномагнетитового концентрата, содержащего до Fe- 54%, TiO2 - 7%, V- 1% и Mn – 0.8% масc.доли, с флюсовыми добавками 25% масc.доли соды. C использованием термодинамических расчетов определены условия восстановления гранул природным газом в фильтрующем слое трубчатой печи при 875-925 °С с получением железного порошка и титановой фракции. Зависимость степени металлизации (μ,%) офлюсованных (25% Na2CO3) гранул титаномагнетитового концентрата от температуры восстановления природным газом при продолжительности восстановления t=30 мин, скорости подачи природного газа ν = 0.1 л/мин и при объеме природного газа пошедшего на восстановление V=0.6 м3/кг аппроксимирована полиномом: μ = 14.933.10-6T3 – 0.043T2 + 41.222T – 13042
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