Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite
High-chromium vanadium-titanium magnetite (HCVTM) in the Hongge region has been used as an essential mineral resource in ironmaking. The effects of MgO on sintering performance and metallurgical properties were investigated by sintering pot tests, X-ray diffraction (XRD), and scanning electron micro...
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doaj-17f2623b2352480c89ef071e4e66dc1c2020-11-25T02:31:27ZengMDPI AGMinerals2075-163X2019-05-019532410.3390/min9050324min9050324Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium MagnetiteLiheng Zhang0Songtao Yang1Weidong Tang2Xiangxin Xue3School of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaHigh-chromium vanadium-titanium magnetite (HCVTM) in the Hongge region has been used as an essential mineral resource in ironmaking. The effects of MgO on sintering performance and metallurgical properties were investigated by sintering pot tests, X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). HCVTM sinters with varying MgO contents (2.7−3.5%), which was achieved by adding dolomite, were tested for yield, strength, reduction degradation index (RDI), reduction index (RI), and softening-melting properties. The productivity and the comprehensive index were evaluated. The results show that yield and productivity increased, while the vertical sintering speed and the tumbler index (TI) initially increased then decreased with the increase of MgO content. The mineral structure of HCVTM sinter changed from a non-uniform state to a uniform state with increased MgO content. Most of the Mg<sup>2+</sup> entered the magnetite lattice, while a small amount entered the perovskite and the calcium silicate. The increase of MgO content improved RDI and softening-melting properties while reducing RI. The best recommended amount of MgO was 3.3% from the comprehensive index.https://www.mdpi.com/2075-163X/9/5/324MgOhigh-chromium vanadium-titanium magnetitesintering pot testsintering performancemetallurgical property |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liheng Zhang Songtao Yang Weidong Tang Xiangxin Xue |
spellingShingle |
Liheng Zhang Songtao Yang Weidong Tang Xiangxin Xue Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite Minerals MgO high-chromium vanadium-titanium magnetite sintering pot test sintering performance metallurgical property |
author_facet |
Liheng Zhang Songtao Yang Weidong Tang Xiangxin Xue |
author_sort |
Liheng Zhang |
title |
Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite |
title_short |
Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite |
title_full |
Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite |
title_fullStr |
Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite |
title_full_unstemmed |
Investigations of MgO on Sintering Performance and Metallurgical Property of High-Chromium Vanadium-Titanium Magnetite |
title_sort |
investigations of mgo on sintering performance and metallurgical property of high-chromium vanadium-titanium magnetite |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2019-05-01 |
description |
High-chromium vanadium-titanium magnetite (HCVTM) in the Hongge region has been used as an essential mineral resource in ironmaking. The effects of MgO on sintering performance and metallurgical properties were investigated by sintering pot tests, X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). HCVTM sinters with varying MgO contents (2.7−3.5%), which was achieved by adding dolomite, were tested for yield, strength, reduction degradation index (RDI), reduction index (RI), and softening-melting properties. The productivity and the comprehensive index were evaluated. The results show that yield and productivity increased, while the vertical sintering speed and the tumbler index (TI) initially increased then decreased with the increase of MgO content. The mineral structure of HCVTM sinter changed from a non-uniform state to a uniform state with increased MgO content. Most of the Mg<sup>2+</sup> entered the magnetite lattice, while a small amount entered the perovskite and the calcium silicate. The increase of MgO content improved RDI and softening-melting properties while reducing RI. The best recommended amount of MgO was 3.3% from the comprehensive index. |
topic |
MgO high-chromium vanadium-titanium magnetite sintering pot test sintering performance metallurgical property |
url |
https://www.mdpi.com/2075-163X/9/5/324 |
work_keys_str_mv |
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