Effects of Preoxidation on Phase Composition and Microstructure of Vanadium TitanoMagnetite

doi:-

Abstract

Abstract: Oxidized pellets were prepared with vanadium titaniummagnetite ores. The effects of preoxidation temperature from room temperature to 500， 700， 900， 1000， 1100， 1200， 1250℃ on phase composition and microstructure of the pellets were studied using XRD and SEM. When the preoxidation temperature was under 500℃， the transformation of γFe2O3 to αFe2O3 occurred within the pellets without oxidizing reaction. While the preoxidation temperature was above 500℃， with the increase of the temperature， TTM and FeTiO3 within the pellets were oxidized and formed TTH and Fe2TiO5， the white phase (consisting of Fe， V， Ti) gathered and gradually separated from the black phase(consisting of Mg， Al， Si)， and the crystal form transformed from relatively dispersive particles to a form with close interconnection and strong structure force.

Key words: vanadium titaniummagnetite ores, preoxidation, phase composition, microstructure, crystal types

CLC Number:

TF55

CHEN Shuangyin， CHU Mansheng， TANG Jue， WU Xianglong. Effects of Preoxidation on Phase Composition and Microstructure of Vanadium TitanoMagnetite[J]. Journal of Northeastern University, 2013, 34(4): 536-540.

References

[1] Akimoto S，Katsura T.Magnetochemical study of the generalized titanomagnetic in volcani rocks［J］.Journal of Geomagnetism and Geoelectricity，1959(10):69/90.
[2] Katsura T，Kushiro I.Titanomagnetic in igneous rocks［J］.American Mineralogist，1961，46(1):134/145.
[3] Katsura T.Generalized titanomagnetic in Hawaiian volcanic rocks［J］.Pacific Science，1964，18(4):223/228.
[4] Paunova R.Thermodynamic study of the reduction of titanium magnetite concentrate with solid carbon［J］.Metallurgical and Materials Transactions B，2002，33(8):633/638.
[5] Roshchin V，Asanov A，Roshchin A.Possibilities of twostage processing of eitaniferous magnetite ore concentrates［J］.Russian Metallurgy，2011(6):15/25.
[6] 杨绍利.钒钛磁铁矿非高炉冶炼技术［M］.北京:冶金工业出版社，2012:62/66.(Yang Shaoli.Nonblast furnace ironmaking technica on vanadium and titanium magnetite［M］.Beijing:Metallurgical Industry Press，2012:62/66.)
[7] 储绍彬，石笙陶.钒钛磁铁矿精矿粉的还原过程［J］.钢铁，1981，16(1):10/18.(Chu Shaobin，Shi Shengtao.Reduction process of fine concentrates of VTibearing magnetite［J］.Iron and Steel，1981，16(1):10/18.)
[8] 郭宇峰，吕亚男，姜涛，等.预氧化在攀枝花钛铁矿固态还原过程中的作用［J］.北京科技大学学报，2010，32(4):413/419.(Guo Yufeng，Lyu Yanan，Jiang Tao，et al.Effect of preoxidation on Panzhihua ilmenite in solid state reduction process［J］.Journal of University of Science and Technology Beijing，2010，32(4):413/419.)
[9] 孙康，马跃宇，白魁昌，等.预氧化钛铁矿的还原反应历程［J］.中国有色金属学报，1998(Sup2):390/393.(Shun Kang，Ma Yueyu，Bai Kuichang，et al.Study on reduction reaction mechanism of preoxidation ilmenite［J］.The Chinese Journal of Nonferrous Metals，1998(Sup2):390/393.)
[10] Pogudin D S，Morozov A A，Sadykhov G B，et al.Phase formation during the reduction of titanomagnetite from the Gremyakhavyrmes deposit［J］.Russian Metallurgy，2010(9):759/762.

[1]	WANG Zhen， JIANG Mao-fa， LIU Cheng-jun， MIN Yi. Microstructure Analysis of Mold Flux of Cao-SiO₂-Al₂O₃-Na₂O-MgO System for Ingot Casting [J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 517-523.
[2]	WEN Xue-long， WANG Cheng-bao， LIU Wen-bo， REN Hai-yang. Experimental Study on the Microstructure of FeCoNiCr High-Entropy Alloys by Selective Laser Melting [J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 536-543.
[3]	JIA Peng， ZHU Peng-cheng， LI Bo， MAO Song-ze. Experimental Study on Wave Characteristics and Acoustic Emission Characteristics of Thermal Damaged Marble [J]. Journal of Northeastern University(Natural Science), 2023, 44(2): 279-288.
[4]	ZHI Wei-jun ， YAO Zan， JIANG Zhou-hua. Microstructure Evolution of High Carbon Galvanized Steel Wire and Effect on Torsional Property [J]. Journal of Northeastern University(Natural Science), 2023, 44(1): 49-54.
[5]	WEN Xue-long， HAN Feng-bing， GONG Ya-dong， HUANG Xiong-jun. Effect of Deposition Time on the Surface Properties of Vacuum Ion Plating TiC Coated Micro-grinding Tools [J]. Journal of Northeastern University(Natural Science), 2022, 43(6): 857-863.
[6]	DONG Yan-wu， PENG Fei， TIAN Jia-long， JIANG Zhou-hua. Effect of Aging Treatment on Microstructure and Mechanical Properties of 10Ni10Mn2CuAl Steel [J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 646-651.
[7]	ZHI Wei-jun ， YAO Zan， JIANG Zhou-hua. Research on Fine Characterization of Microstructure Difference of High Carbon Galvanized Steel Wire [J]. Journal of Northeastern University(Natural Science), 2022, 43(4): 501-508.
[8]	SONG Hong-yu， LIU Hai-tao， WANG Guo-dong. Hot Rolling Twinning Behavior of Strip Casting Grain-Oriented Silicon Steel [J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 182-187.
[9]	ZHAO Yu-hui ， GAO Meng-qiu ， ZHAO Ji-bin ， HE Chen. Microstructure and Properties of WC Particles Reinforced 316L Stainless Steel Composites Prepared by Additive and Subtractive Manufacturing [J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 197-205.
[10]	WANG Yin， LI Yong， QIAN Xiao-ming， ZHANG Bo-si. Effect of the Cooling Rate of Vacuum Centrifugal Casting on Microstructure and Mechanical Properties of 7055 Aluminum Alloy [J]. Journal of Northeastern University(Natural Science), 2022, 43(12): 1769-1776.
[11]	YAO Yun-long， XIU Shi-chao， SUN Cong， HONG Yuan. Dynamic Recrystallization Behavior of Grinding Surface Based on 40Cr High Temperature Dynamic Mechanical Properties [J]. Journal of Northeastern University(Natural Science), 2021, 42(8): 1120-1126.
[12]	GAO Cai-ru， QU Bing-bing， TIAN Yu-dong， DU Lin-xiu. Effect of Tempering Temperature on Microstructure and Mechanical Properties of On-Line Quenched Q690q Bridge Steel [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 927-933.
[13]	BI Meng-yuan， XIE Ren-yi， ZHANG Yi-fan， YI Hai-long. Microstructure Evolution and Recrystallization Kinetics of CoCrFeNi High Entropy Alloy [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 933-938.
[14]	ZHU Cheng-lin， GAO Xiu-hua， WANG Ming-ming， SONG Li-ying. Effect of Quenching Temperature on Microstructure and Mechanical Properties of 12Cr14Ni2 Stainless Structural Steel [J]. Journal of Northeastern University(Natural Science), 2021, 42(6): 781-788.
[15]	XI Wen-chao， SONG Bo-xue， LIANG Ying-dong， YU Tian-biao. Research on Thermodynamics and Wear Resistance of In-situ NbC Reinforced YCF102 Cladding Layer [J]. Journal of Northeastern University(Natural Science), 2021, 42(4): 538-543.