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Minerals 2017, 7(11), 210; doi:10.3390/min7110210

Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter

1
School of Metallurgy, Northeastern University, Shenyang 110819, China
2
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
3
Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources, Shenyang 110819, China
*
Authors to whom correspondence should be addressed.
Received: 22 July 2017 / Revised: 28 October 2017 / Accepted: 30 October 2017 / Published: 2 November 2017
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Abstract

Chengde chromium-bearing vanadium–titanium magnetite (CCVTM) has been used as an important mineral resource in sinter making. The MgO content of this sinter can be enhanced by adding dolomite, which improved operation of the blast furnace. The effects of MgO in the form of dolomite on metallurgical properties, microstructure and mineral compositions of CCVTM sinter were studied by a sinter pot test, X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and mineral phase microanalysis. The results were as follows: The flame front speed and sinter coefficient decreased with an increase in MgO content from 2.66 to 3.86% by adding dolomite. With an increase in MgO content from 2.66 to 3.86%, the flame front speed, sintering utilization factor, and the value of RI decreased, while RDI and the softening–melting properties improved. In addition, the value of sinter strength (TI) reached a maximum value at MgO = 3.56%. In addition, an increase in the abundance of magnetite, magnesium ferrite, and silicate phase, as well as a decrease in hematite, was found with an increase in MgO content. We concluded that the most appropriate MgO content in the sinter is 3.56%. View Full-Text
Keywords: vanadium–titanium magnetite; sinter; mineralogical phases; metallurgical properties; MgO vanadium–titanium magnetite; sinter; mineralogical phases; metallurgical properties; MgO
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Yang, S.; Tang, W.; Zhou, M.; Jiang, T.; Xue, X.; Zhang, W. Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter. Minerals 2017, 7, 210.

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