Zhang Qiang, Liang Bin, Lü Li, Liu Weizao, Ma Xueyang, Li Chun. Study on Transformation of Perovskite into Pseudobrookite in Ti-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 8-14. doi: 10.7513/j.issn.1004-7638.2017.01.002
Citation:
Zhang Qiang, Liang Bin, Lü Li, Liu Weizao, Ma Xueyang, Li Chun. Study on Transformation of Perovskite into Pseudobrookite in Ti-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 8-14. doi: 10.7513/j.issn.1004-7638.2017.01.002
Zhang Qiang, Liang Bin, Lü Li, Liu Weizao, Ma Xueyang, Li Chun. Study on Transformation of Perovskite into Pseudobrookite in Ti-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 8-14. doi: 10.7513/j.issn.1004-7638.2017.01.002
Citation:
Zhang Qiang, Liang Bin, Lü Li, Liu Weizao, Ma Xueyang, Li Chun. Study on Transformation of Perovskite into Pseudobrookite in Ti-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 8-14. doi: 10.7513/j.issn.1004-7638.2017.01.002
The reaction system in which the titanium component transforms into pseudobrookite （Fe2TiO5） by sulfating decomposition of perovskite （CaTiO3） was analyzed.The results show that the transformation can be completed through one step by introducing SO2+O2mixed gas into the CaTiO3/FeSO4 reaction system.Based on the analysis,an experimental investigation was conducted with focus on the influences of reaction temperature,reactants molar ratio,SO2 concentration and reaction time on the sulfating reaction.It is indicated that 92% titanium component in perovskite transforms into pseudobrookite with reaction at 1 473 K for 120 min,25% （v/v） of SO2 concentration and 1 ∶ 2.1 of molar ratio for CaTiO3/Fe SO4.The sulfating reaction mechanism changes with temperature. Perovskite is decomposed through the reaction CaTiO3+SO2+1/2O2= CaSO4+TiO2 at 973-1 373 K and CaTiO3+SO2+ 1/2O2+Fe2O3= CaSO4+Fe2TiO5 at 1 473 K.
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