Effects of MgO and TiO2 on the viscous behaviors and phase compositions of titanium-bearing slag

被引:44
作者
Feng, Cong [1 ]
Chu, Man-sheng [1 ]
Tang, Jue [1 ]
Qin, Jin [1 ]
Li, Feng [1 ]
Liu, Zheng-gen [1 ]
机构
[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
基金
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词
ironmaking; blast furnace slag; viscous properties; phase composition; magnesium oxide; titanium dioxide; SILICATE-BASED SLAGS; LOW-MASS RATIO; VISCOSITY; AL2O3; BASICITY; SIO2; CAO;
D O I
10.1007/s12613-016-1302-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of MgO and TiO2 on the viscosity, activation energy for viscous flow, and break-point temperature of titanium-bearing slag were studied. The correlation between viscosity and slag structure was analyzed by Fourier transform infrared (FTIR) spectroscopy. Subsequently, main phases in the slag and their content changes were investigated by X-ray diffraction and Factsage 6.4 software package. The results show that the viscosity decreases when the MgO content increases from 10.00wt% to 14.00wt%. Moreover, the break-point temperature increases, and the activation energy for viscous flow initially increases and subsequently decreases. In addition, with increasing TiO2 content from 5.00wt% to 9.00wt%, the viscosity decreases, and the break-point temperature and activation energy for viscous flow initially decrease and subsequently increase. FTIR analyses reveal that the polymerization degree of complex viscous units in titanium-bearing slag decreases with increasing MgO and TiO2 contents. The mechanism of viscosity variation was elucidated. The basic phase in experimental slags is melilite. Besides, as the MgO content increases, the amount of magnesia-alumina spinel in the slag increases. Similarly, the sum of pyroxene and perovskite phases in the slag increases with increasing TiO2 content.
引用
收藏
页码:868 / 880
页数:13
相关论文
共 27 条
[1]   Viscosity and viscosity estimation model of fully liquid slags in TiO2-Al2O3-CaO-SiO2 and TiO2-Al2O3-CaO-SiO2-MgO systems with high TiO2 concentration and low mass ratio of CaO to SiO2 [J].
Dong, X. -J. ;
Sun, H. -Y. ;
She, X. -F. ;
Xue, Q. G. ;
Wang, J. -S. .
IRONMAKING & STEELMAKING, 2014, 41 (02) :99-106
[2]   Influence of B2O3 and TiO2 on Viscosity of Titanium-Bearing Blast Furnace Slag [J].
Gao, Yanhong ;
Bian, Lingtao ;
Liang, Zhongyu .
STEEL RESEARCH INTERNATIONAL, 2015, 86 (04) :386-390
[3]   Effects of basicity and MgO content on the viscosity of the SiO2-CaO-MgO-9wt%Al2O3 slag system [J].
Gao, Yun-ming ;
Wang, Shao-bo ;
Hong, Chuan ;
Ma, Xiu-juan ;
Yang, Fu .
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2014, 21 (04) :353-362
[4]   Effect of Al2O3 and CaO/SiO2 on the Viscosity of Calcium-Silicate-Based Slags Containing 10 Mass Pct MgO [J].
Kim, Hyuk ;
Matsuura, Hiroyuki ;
Tsukihashi, Fumitaka ;
Wang, Wanlin ;
Min, Dong Joon ;
Sohn, Il .
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2013, 44 (01) :5-12
[5]   Effect of CaF2 and Li2O Additives on the Viscosity of CaO-SiO2 Na2O Slags [J].
Kim, Hyuk ;
Sohn, Il .
ISIJ INTERNATIONAL, 2011, 51 (01) :1-8
[6]   The Effect of MgO on the Viscosity of the CaO-SiO2-20 wt%Al2O3-MgO Slag System [J].
Kim, Hyuk ;
Kim, Wan Ho ;
Sohn, Il ;
Min, Dong Joon .
STEEL RESEARCH INTERNATIONAL, 2010, 81 (04) :261-264
[7]   Influence of MgO and Al2O3 contents on viscosity of blast furnace type slags containing FeO [J].
Kim, JR ;
Lee, YS ;
Min, DJ ;
Jung, SM ;
Yi, SH .
ISIJ INTERNATIONAL, 2004, 44 (08) :1291-1297
[8]  
[李福民 LI Fumin], 2006, [钢铁, Iron and Steel], V41, P19
[9]   Influence of TiO2 and basicity on viscosity of Ti bearing slag [J].
Liao, J. L. ;
Li, J. ;
Wang, X. D. ;
Zhang, Z. T. .
IRONMAKING & STEELMAKING, 2012, 39 (02) :133-139
[10]   Effect of TiO2 on the Viscosity and Slag Structure in Blast Furnace Type Slags [J].
Park, Hyunsik ;
Park, Jun-Young ;
Kim, Gi Hyun ;
Sohn, Il .
STEEL RESEARCH INTERNATIONAL, 2012, 83 (02) :150-156