首页|Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium

Oxidation behavior of low-grade vanadiferous titanomagnetite concentrate with high titanium

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In order to clarify the oxidation mechanisms and make better use of the low-grade vanadiferous titanomagnetite con-centrate with high titanium(LVTC),the oxidation behavior of LVTC was investigated.The results showed that oxidation degree was achieved within 90 min when temperature was not lower than 700 ℃,and the main phases of the oxidized LVTC consisted of Fe9TiO15,Fe2O3,CaSiTiO5 and a small amount of Fe2.75Ti0.25O4.Increasing temperature is favorable to the formation of Fe2TiO5.The surface of LVTC gradually becomes rough,with fine particles of needle-like and granular shape appearing on the surface,which finally turn from laminar to creamy,spread out,and are interspersed with many tiny holes.The phase oxidation paths in LVTC were as follows:(1)Fe2.75Ti0.25O4 → Fe9TiO15+Fe2O3;(2)Fe2.75Ti0.25O4 →Fe2O3+FeTiO3-+Fe2TiO5;(3)FeTiO3 → Fe2O3+Fe2Ti3O9 → Fe2TiO5.LVTC is predominantly mesoporous whe-ther oxidized or not,with the pores mainly distributed in the range of 2-40 nm,and the specific surface area of LVTC decreases significantly with increasing temperature.

Low-grade vanadiferous titanomagnetite concentrateOxidation degreePhase transformationMicromorphologyOxidation pathPore structure

Jin-sheng Liu、Zhen-xing Xing、Gong-jin Cheng、Xue-yong Ding、Xiang-xin Xue

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School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China

Liaoning Key Laboratory of Recycling Science for Metallurgical Resources,Shenyang 110819,Liaoning,China

Innovation Research Institute of Vanadium and Titanium Resource Industry Technology,Northeastern University,Shenyang 110819,Liaoning,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key R&D Program of China

5167408421908020U19082262017YFB0603801

2024

10.1007/s42243-023-01077-2

钢铁研究学报(英文版)
钢铁研究总院

钢铁研究学报(英文版)

CSTPCD
影响因子：0.584
ISSN：1006-706X
年,卷(期)：2024.31(2)
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