Effects of MgO/Al2O3 ratio on viscous behaviors and structures of MgO-Al2O3-TiO2-CaO-SiO2 slag systems with high TiO2 content and low CaO/SiO2 ratio

被引：37
作者：
Feng, Cong [1 ,2 ]
Gao, Li-hua [1 ,2 ]
Tang, Jue [1 ,2 ]
Liu, Zheng-gen [1 ]
Chu, Man-sheng [1 ,2 ]
机构：
[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2020年 / 30卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
vanadium-bearing titanomagnetite; titanium-bearing slag; viscous behavior; degree of polymerization of slag; MgO/Al2O3; ratio; TITANOMAGNETITE METALLIZED PELLETS; DIRECT-REDUCTION; RAMAN-SPECTROSCOPY; VISCOSITY; TITANIUM; VANADIUM; PHASE; MGO; PARAMETERS; BASICITY;
D O I：
10.1016/S1003-6326(20)65255-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of MgO/Al2O3 ratio on the viscous behaviors of MgO/Al2O3-TiO2-CaO-SiO2 systems were investigated by the rotating cylinder method Raman spectroscopy was used to analyze the structural characteristics of slag and Factsage 7.0 was adopted to demonstrate the liquidus temperature of slag. The results show that the viscosity and activation energy for viscous flow decrease when the MgO/Al2O3 ratio increases from 0.82 to 1.36. The break point temperature and liquidus temperature of slag initially decrease and subsequently increase. The complex viscous structures are gradually depolymerized to simple structural units. In conclusion, with the increase of MgO/Al2O3 ratio, the degree of polymerization of slag decreases, which improves the fluidity of slag. The variations of liquidus temperature of slag lead to the same changes of break point temperature.
引用
收藏
页码：800 / 811
页数：12
相关论文
共 40 条
[1]   Effect of CaF2 on viscosity, structure and properties of CaO-Al2O3-MgO-SiO2 slag glass ceramics [J].
Deng, Leibo ;
Zhang, Xuefeng ;
Zhang, Mingxing ;
Jia, Xiaolin .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2018, 500 :310-316
[2]   Effects of CaO/SiO2 on Viscous Behaviors and Structure of CaO-SiO2-11.00wt%MgO-11.00wt%Al2O3-43.00wt%TiO2 Slag Systems [J].
Feng, Cong ;
Tang, Jue ;
Gao, Lihua ;
Liu, Zhenggen ;
Chu, Mansheng .
ISIJ INTERNATIONAL, 2019, 59 (01) :31-38
[3]   Effects of smelting parameters on the slag/metal separation behaviors of Hongge vanadium-bearing titanomagnetite metallized pellets obtained from the gas-based direct reduction process [J].
Feng, Cong ;
Chu, Man-sheng ;
Tang, Jue ;
Liu, Zheng-gen .
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2018, 25 (06) :609-622
[4]   Effect of CaO/SiO2 and Al2O3 on Viscous Behaviors of the Titanium-Bearing Blast Furnace Slag [J].
Feng, Cong ;
Chu, Mansheng ;
Tang, Jue ;
Tang, Yating ;
Liu, Zhenggen .
STEEL RESEARCH INTERNATIONAL, 2016, 87 (10) :1274-1283
[5]   Effects of MgO and TiO2 on the viscous behaviors and phase compositions of titanium-bearing slag [J].
Feng, Cong ;
Chu, Man-sheng ;
Tang, Jue ;
Qin, Jin ;
Li, Feng ;
Liu, Zheng-gen .
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2016, 23 (08) :868-880
[6]   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
[7]   Effect of ZnO on Viscosity and Structure of CaO-SiO2-ZnO-FeO-Al2O3 Slags [J].
Jin, Zhenan ;
Yang, Hongying ;
Lv, Jianfang ;
Tong, Linlin ;
Chen, Guobao ;
Zhang, Qin .
JOM, 2018, 70 (08) :1430-1436
[8]   Crystallization Control for Remediation of an FetO-Rich CaO-SiO2-Al2O3-MgO EAF Waste Slag [J].
Jung, Sung Suk ;
Sohn, Il .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2014, 48 (03) :1886-1892
[9]   A Study of the Viscous Properties with NaF Additions in the CaO-SiO2-12 mass pct Na2O Based Slags [J].
Kim, Gi Hyun ;
Sohn, Il .
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2011, 42 (06) :1218-1223
[10]   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
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