Zhang Shiqiu, Wang Weiqing, Yan Wu, Deng Jie, Huang Yang. Effects of Heat Treatment Conditions on Precipitation Behavior of Perovskite in the Titanium-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2016, 37(2): 8-14. doi: 10.7513/j.issn.1004-7638.2016.02.002
Citation:
Zhang Shiqiu, Wang Weiqing, Yan Wu, Deng Jie, Huang Yang. Effects of Heat Treatment Conditions on Precipitation Behavior of Perovskite in the Titanium-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2016, 37(2): 8-14. doi: 10.7513/j.issn.1004-7638.2016.02.002
Zhang Shiqiu, Wang Weiqing, Yan Wu, Deng Jie, Huang Yang. Effects of Heat Treatment Conditions on Precipitation Behavior of Perovskite in the Titanium-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2016, 37(2): 8-14. doi: 10.7513/j.issn.1004-7638.2016.02.002
Citation:
Zhang Shiqiu, Wang Weiqing, Yan Wu, Deng Jie, Huang Yang. Effects of Heat Treatment Conditions on Precipitation Behavior of Perovskite in the Titanium-bearing Blast Furnace Slag[J]. IRON STEEL VANADIUM TITANIUM, 2016, 37(2): 8-14. doi: 10.7513/j.issn.1004-7638.2016.02.002
1. School of Environment and Resource, Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;
2. Key Laboratory of Vanadium-titanium Magnetite Comprehensive Utilization, Ministry of Land and Resources, Chengdu 610000, Sichuan, China
In order to achieve the effective recovery of titanium component in the titanium-blast furnace slag from Pangang Group Co.,Ltd.,the effect of different heat treatment conditions on selective precipitation behavior of perovskite as the enriched phase of titanium were studied in this paper.Through analyzing the chemical components and mineral compositions of the slag,the effects of Fe2O3 addition amount,crystallization temperature and period,and cooling rate on the enrichment of perovskite were explored using selective precipitation technology integrating phase diagram theories.It is shown that with 2.54% CaO added as regulator and pre-oxidation at 1 025℃ for 30 min,then with 1% Fe2O3 mixed and smelting at 1 470℃ for 60 min,and cooling to 1 320℃ at a speed of 0.5℃/min and insulation for 90 min,the modified slag having 30.62% of perovskite with 63.17 μm of crystal size can be finally obtained,which realizes the efficient enrichment of TiO2 in titanium-bearing blast furnace slag and is beneficial to the separation of titanaugite and perovskite.
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