Phase Transformation and Non-isothermal Oxidation Kinetics of Hongge Vanadium-Bearing Titanomagnetite

doi:10.12068/j.issn.1005-3026.2017.04.013

Abstract

Abstract: The existence form and phase transformation of Hongge vanadium-bearing titanomagnetite (HVTM) pellets during oxidation process were investigated based on the study of fundamental characteristics of the ore. The non-isothermal oxidation kinetics of HVTM was also studied by the thermogravimetry. The results indicated that the HVTM is high chromium vanadium-bearing titanomagnetite with 1.48wt% Cr₂O₃ and its crystal stock strength is 625 N， the ore mainly consists of magnetite， titanomagnetite， coulsonite and chromite. The HVTM oxidizes slowly below 300℃. Phase transformation behavior of valuable elements is as follows: Fe₃O₄→Fe₂O₃， Fe₂VO₄→(Cr_0.15V_0.85)₂O₃， Fe_2.75Ti_0.25O₄→FeTiO₃→Fe₉TiO₁₅， FeCr₂O₄→(Fe_0.6Cr_0.4)₂O₄， Fe_0.7Cr_1.3O₃ and (Cr_0.15V_0.85)₂O_3.The results of non-isothermal oxidation kinetics of HVTM showed that when the HVTM oxidized at 220~380℃， 380~500℃ and 500~800℃ with a heating rate of 10℃·min^-1， the activation energy are 47.02， 14.95 and 30.36kJ·mol^-1， respectively.

Key words: Hongge vanadium-bearing titanomagnetite, fundamental characteristics, oxidation, phase transformation, non-isothermal kinetics

CLC Number:

TF046.6

LI Wei， FU Gui-qin， CHU Man-sheng， ZHU Miao-yong. Phase Transformation and Non-isothermal Oxidation Kinetics of Hongge Vanadium-Bearing Titanomagnetite[J]. Journal of Northeastern University Natural Science, 2017, 38(4): 517-521.

References

[1]罗金华，邱克辉，张佩聪，等.红格钒钛磁铁矿中钛磁铁矿的矿物学特征研究［J］.矿物岩石，2013(9):1-6.(Luo Jin-hua，Qiu Ke-hui，Zhang Pei-cong，et al.Studies of mineralogical characteristics of titano-magnetite in Hongge vanadium-titanium magnetite［J］.Journal of Mineralogy and Petrology，2013(9):1-6.)
[2]张建廷.红格铁矿铬的赋存、分布与回收利用［J］.四川有色金属，2005(1):1-4.(Zhang Jian-ting.The occurrence distribution and recovery technologies of chromium in Hongge iron ore［J］.Sichuan Nonferrous Metals，2005(1):1-4.)
[3]Vijay P L，Venugopalan R，Sathiyamoorthy D.Preoxidation and hydrogen reduction of ilmenite in a fluidized bed reactor［J］.Metallurgical and Materials Transactions B，1996，27(5):731-738.
[4]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.)
[5]Park E，Ostrovski O.Effects of preoxidation of titania-ferrous ore on the ore structure and reduction behavior［J］.ISIJ International，2004，44(1):74-81.
[6]Forsmo S P E，Forsmo S E，Samskog P O，et al.Mechanisms in oxidation and sintering of magnetite iron ore green pellets［J］.Powder Technology，2008，183(2):247-259.
[7]El-Guindy M L，Davenport W G.The kinetics of transformation of titano-magnetite to titano-hematite and processes accompanying this transformation in vanadium-containing titano-magnetite concentrate pellets［J］.Prace Instytutu Metalurgii elaza，1985，37(1):8-14.
[8]Papanastassiou D，Bitsianes G.Mechanisms and kinetics underlying the oxidation of magnetite in the induration of iron ore pellets［J］. Metallurgical Transactions，1973，2(4):487-495.
[9]Forsmo S P E，Hgglund A.Influence of the olivine additive fineness on the oxidation of magnetite pellets［J］.International Journal of Mineral Processing，2003，70(1/2/3/4):109-122.
[10]Liang R Q，Yang S，Yan F S，et al.Kinetics of oxidation reaction for magnetite pellets［J］.Journal of Iron and Steel Research，International，2013，20(9):16-20.
[11]Coats A W，Redfern J P.Kinetic parameters from thermogravimetric data［J］.Nature，1964，201:68-69.

[1]	HUANG Xue-chi， LI Bao-kuan， LIU Cheng-jun， LIU Zhong-qiu. Effect of Low Vacuum on Electroslag Remelting Process and Ingot Quality [J]. Journal of Northeastern University(Natural Science), 2023, 44(1): 55-62.
[2]	LIU Fu-bin， ZHANG Hai-bao， GAO Jun-zhe， GENG Xin. Thermodynamic Analysis of Aluminum and Titanium Oxidation During Electroslag Remelting Process of Inconel 625 Alloy [J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 652-659.
[3]	WANG Chang-jun， YU Yang， LI Bao-kuan， LIU Xue-lin. Simulation of Drying and Oxidation Process of Pellets Layers in Steel Belt Sintering [J]. Journal of Northeastern University(Natural Science), 2021, 42(9): 1282-1289.
[4]	WANG Hao， CAO Guang-ming， TANG Jun-jian， LIU Zhen-yu. High Temperature Oxidation Behavior of 700MPa Grade High Strength Steel Under Water Vapor Condition [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 920-926.
[5]	CAO Guang-ming， GAO Xin-yu， SHAN Wen-chao， PAN Shuai. High Temperature Oxidation Behavior of Ni-based Low Temperature Steel [J]. Journal of Northeastern University Natural Science, 2020, 41(6): 792-800.
[6]	NIU Yi-jing， SUN Cong， PANG Gang， XIU Shi-chao. Effect of Pre-stress Time-Characteristics on Grinding Strengthened Surface Stress [J]. Journal of Northeastern University Natural Science, 2020, 41(4): 546-550.
[7]	PENG Liang-gui， XING Jun-fang， CHEN Guo-tao， GONG Dian-yao. Adaptive Method for Coiling Temperature Control Model Coupled with Heat Transfer and Phase Transformation [J]. Journal of Northeastern University Natural Science, 2020, 41(1): 62-67.
[8]	TENG Ai-jun， XU Hong-hong， XUE Xiang-xin. Clean Roasting Process for Treating Vanadium Slag by Using Binary Sodium Salts System [J]. Journal of Northeastern University Natural Science, 2019, 40(9): 1291-1297.
[9]	GONG Yan-bing， SUN Jun-min， ZHANG Ting-an， LYU Guo-zhi. Alkali Recovery from the Bayer Leaching Slag of High Alumina Fly Ash [J]. Journal of Northeastern University Natural Science, 2019, 40(3): 345-350.
[10]	LI Hai-bo， LI Ying-hua ， BAI Xue-yu， BAI Jia-ning. Matrix ORP Disturbance Characteristics and Its Affecting Factors in Subsurface Wastewater Infiltration System [J]. Journal of Northeastern University Natural Science, 2019, 40(11): 1641-1647.
[11]	WANG Kun， LIU Jin-lin， YU Qing-bo， LUAN Wei-peng. Experimental Study on Oxidation and Reduction Reactivity of Cu/Mn Composite Oxygen Carriers [J]. Journal of Northeastern University Natural Science, 2019, 40(1): 48-52.
[12]	CAO Guang-ming， LIN Fei， LI Zhi-feng， LIU Zhen-yu. High-Temperature Oxidation Behavior of X80 Pipeline Steel [J]. Journal of Northeastern University Natural Science, 2018, 39(9): 1237-1241.
[13]	ZHU Tong， JIA Ruo-tan， LIANG Qi-yu， XIE Yuan-hua. Evolution Analysis of Microbial Community During the Running Process in an ANAMMOX Reactor [J]. Journal of Northeastern University Natural Science, 2018, 39(5): 693-698.
[14]	WANG Jian， LIU Zi-long， CHEN Guo-bao， YANG Hong-ying. Consumption Mechanism of Sodium Sulfide in Flotation Separation of Copper and Molybdenum [J]. Journal of Northeastern University Natural Science, 2018, 39(3): 362-366.
[15]	SUN Yong-sheng， CAO Yue， HAN Yue-xin， LI Yan-jun. Oxidation Kinetics of Magnetite During the Cooling Process of Magnetization Roasting [J]. Journal of Northeastern University Natural Science, 2018, 39(12): 1759-1763.