Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

Tian-yang Hu; Ti-chang Sun; Jue Kou; Chao Geng; Yong-qiang Zhao

doi:10.1007/s12613-017-1512-4

Volume 24 Issue 11

Nov. 2017

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文章导航 > 矿物冶金与材料学报（英文） > 2017 > 24(11): 1201-1210

Tian-yang Hu, Ti-chang Sun, Jue Kou, Chao Geng, and Yong-qiang Zhao, Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1201-1210. https://doi.org/10.1007/s12613-017-1512-4

Cite this article as:

Tian-yang Hu, Ti-chang Sun, Jue Kou, Chao Geng, and Yong-qiang Zhao, Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1201-1210. https://doi.org/10.1007/s12613-017-1512-4

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研究论文

Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines, Beijing 100083, China

通讯作者:
Ti-chang Sun E-mail: suntc@ces.ustb.edu.cn

中文摘要

The co-reduction roasting and grinding magne -tic separation of seaside titanomagnetite and blast furnace dust was investigated with and without fluorite addition at a reduction roasting temperature of 1250℃ for 60 min, a grinding fineness of -43 μm accounting for 69.02wt% of the total, and a low-intensity magnetic field strength of 151 kA/m. The mineral composition, microstructure, and state of the roasted products were analyzed, and the concentrations of CO and CO₂ were analyzed in the co-reduction roasting. Better results were achieved with a small fluorite dosage (≤ 4wt%) in the process of co-reduction. In addition, F^- was found to reduce the melting point and viscosity of the slag phase because of the high content of aluminate and silicate minerals in the blast furnace dust. The low moisture content of the blast furnace dust and calcic minerals inhibited the hydrolysis of CaF₂ and the loss of F^-. Compared with the blast furnace dust from Chengdeng, the blast furnace dusts from Jiugang and Jinxin inhibited the diffusion of F^- when used as reducing agents, leading to weaker effects of fluorite.

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Research Article

Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

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Abstract

Abstract

The co-reduction roasting and grinding magne -tic separation of seaside titanomagnetite and blast furnace dust was investigated with and without fluorite addition at a reduction roasting temperature of 1250℃ for 60 min, a grinding fineness of -43 μm accounting for 69.02wt% of the total, and a low-intensity magnetic field strength of 151 kA/m. The mineral composition, microstructure, and state of the roasted products were analyzed, and the concentrations of CO and CO₂ were analyzed in the co-reduction roasting. Better results were achieved with a small fluorite dosage (≤ 4wt%) in the process of co-reduction. In addition, F^- was found to reduce the melting point and viscosity of the slag phase because of the high content of aluminate and silicate minerals in the blast furnace dust. The low moisture content of the blast furnace dust and calcic minerals inhibited the hydrolysis of CaF₂ and the loss of F^-. Compared with the blast furnace dust from Chengdeng, the blast furnace dusts from Jiugang and Jinxin inhibited the diffusion of F^- when used as reducing agents, leading to weaker effects of fluorite.
- seaside titanomagnetite;
- blast furnace dust;
- co-reduction roasting;
- fluorite;
- mechanisms

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[1]	E. Cruz-Sánchez, J.F. Álvarez-Castro, J.A. RamÍrez-Picado, and J.A. Matutes-Aquino, Study of titanomagnetite sands from Costa Rica, J. Alloys Compd., 369(2004), No. 1-2, p. 265.
[2]	L.J. Sun, X.J. Lü, and P. Chen, Experimental study on the mineralogical characteristics and processing technique of a beach placer, Min. Res. Dev., 30(2010), No. 2, p. 62.
[3]	K.R. Bryan, A. Robinson, and R.M. Briggs, Spatial and temporal variability of titanomagnetite placer deposits on a predominantly black sand beach, Mar. Geol., 236(2007), No. 1-2, p. 45.
[4]	H.Y. Sun, J.S. Wang, Y.H. Han, X.F. She, and Q.G. Xue, Reduction mechanism of titanomagnetite concentrate by hydrogen, Int. J. Miner. Process., 125(2013), No. 12, p. 122.
[5]	A. Lyberatos, Temperature dependence of the magnetization of titanomagnetites, J. Magn. Magn. Mater., 311(2007), No. 2, p. 560.
[6]	E.K. Kopkova, E.A. Shchelokova, and P.B. Gromov, Processing of titanomagnetite concentrate with a hydrochloric extract of n-octanol, Hydrometallurgy, 156(2015), No. 7, p. 21.
[7]	E.X. Gao, T.C. Sun, C.Y. Xu, Z.G. Liu, Z.Z. Liu, and C.X. Yu, Titanium and ferrum separation of a Seaside titanomagnetite based on reduction roasting, Met. Mine, 449(2013), No. 11, p. 46.
[8]	C.X. Yu, T.C. Sun, C.Y. Xu, E.X. Gao, Z.G. Liu, and Z.Z. Liu, Effect of coal slime as a reducing agent on direct reduction roasting of seaside titanomagnetite, Min. Metall. Eng., 34(2014), No. 5, p. 93.
[9]	E.X. Gao, T.C. Sun, Z.G. Liu, C. Geng, and C.Y. Xu, Effect of sodium sulfate on direct reduction of beach titanomagntite for separation of iron and titanium, J. Iron Steel Res. Int., 23(2016), No. 5, p. 428.
[10]	T.Y. Hu, T.C. Sun, J. Kou, C. Geng, and E.X. Gao, Effect of blast dust as a reductant on direct reduction roasting for separating titanium and iron in seaside tianomagnetite, Chin. J. Eng., 38(2016), No. 5, p. 609.
[11]	D.S. Chen, B. Song, L.N. Wang, T. Qi, Y. Wang, and W.J. Wang, Solid state reduction of Panzhihua titanomagnetite concentrates with pulverized coal, Miner. Eng., 24(2011), No. 8, p. 864.
[12]	Y.M. Zhang, L.Y. Yi, L.N. Wang, D.S. Chen, W.J. Wang, Y.H. Liu, H.X. Zhao, and T. Qi, A novel process for the recovery of iron, titanium, and vanadium from vanadium-bearing titanomagnetite:sodium modification-direct reduction coupled process, Int. J. Miner. Metall. Mater., 24(2017), No. 5, p. 504.
[13]	Š. Langová and D. Matýsek, Zinc recovery from steel-making wastes by acid pressure leaching and hematite precipitation, Hydrometallurgy, 101(2010), No. 3-4, p. 171.
[14]	D. Zhao, J.L. Zhang, G.W. Wang, A.N. Conejo, R.S. Xu, H.Y. Wang, and J.B. Zhong, Structure characteristics and combustibility of carbonaceous materials from blast furnace flue dust, Appl. Therm. Eng., 108(2016), No. 5, p. 1168.
[15]	Z.J. Wu, L.C. Wang, Z.F. Cao, W.M. Liu, and X.R. Wu, Recycling blast furnace dust into metals (Al,Zn and Ti)-doped hematite with enhanced photocatalytic activity, J. Environ. Chem. Eng., 4(2016), No. 1, p. 341.
[16]	Y.L. Zhang, S.P. Li, X.G. Wang, and X.M. Li, Coagulation performance and mechanism of polyaluminum ferric chloride (PAFC) coagulant synthesized using blast furnace dust, Sep. Purif. Technol., 154(2015), No. 11, p. 345.
[17]	S.M. Smith, X. Zhou, and C.L. Nassaralla, A novel process for recycling steelmaking dust, Iron Steelmaker, 27(2000), No. 2, p. 69.
[18]	L.Z. Shen, Y.S. Qiao, Y. Guo, and J.R. Tan, Preparation and formation mechanism of nano-iron oxide black pigment from blast furnace flue dust, Ceram. Int., 39(2013), No. 1, p. 737.
[19]	Z.C. Huang, L.B. Cai, Y.B. Zhang, Y.B.Yang, and T. Jiang, Reduction of iron oxides of red mud reinforced by Na₂CO₃ and CaF₂, J. Cent. South Univ. Sci. Technol., 41(2010), No. 3, p. 838.
[20]	Z.W. Zhang, X. Wu, S.C. Chen, Z.T. Guo, H.J. Yang, and G. Chen, Research on increase of iron recovery during smelting&reduction of metallized pellet of vanadium-bearing titaniferous magnetite, Iron Steel Vanadium Titanium, 34(2013), No. 2, p. 39.
[21]	Q.J. Qi, J.Z. Liu, X.Y. Gao, J.H. Zhou, S.X. Zhang, and K.F. Cen, Stability of CaF₂ at high temperature, Environ. Sci., 23(2002), No. 2, p. 111.
[22]	Y.H. Bai, S.H. Zhu, K. Luo, M.Q. Gao, L.J. Yan, and F. Li, Coal char gasification in H₂O/CO₂ release of alkali and alkaline earth metallic species and their effects on reactivity, Appl. Therm. Eng., 112(2017), No. 2, p. 156.
[23]	Z.W. Yu, G.H. Li, T. Jiang, Y.B. Zhang, Feng. Zhou, and Z.W. Peng, Effect of basicity on titanomagnetite concentrate sintering, ISIJ Int., 55(2015), No. 4, p. 907.
[24]	Y.Y. Zhang, W. Lü, X.W. Lü, S.P. Li, C.G. Bai, B. Song, and K.X. Han, Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N₂ atmosphere, Int. J. Miner. Metall. Mater., 24(2017), No. 3, p. 240.

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Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

中文摘要

Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

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