Phase transformation and electrical resistivity of reduced ilmenite concentrate carbon-containing pellets

Wu Enhui; Xu Zhong; Li Jun; Hou Jing; Huang Ping; Zhang Shiju; Tang Rong; Luo Yuqin

doi:10.7513/j.issn.1004-7638.2024.01.005

Volume 45 Issue 1

Feb. 2024

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Wu Enhui, Xu Zhong, Li Jun, Hou Jing, Huang Ping, Zhang Shiju, Tang Rong, Luo Yuqin. Phase transformation and electrical resistivity of reduced ilmenite concentrate carbon-containing pellets[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 28-33. doi: 10.7513/j.issn.1004-7638.2024.01.005

Citation:

Wu Enhui, Xu Zhong, Li Jun, Hou Jing, Huang Ping, Zhang Shiju, Tang Rong, Luo Yuqin. Phase transformation and electrical resistivity of reduced ilmenite concentrate carbon-containing pellets[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 28-33. doi: 10.7513/j.issn.1004-7638.2024.01.005

Citation:

Wu Enhui, Xu Zhong, Li Jun, Hou Jing, Huang Ping, Zhang Shiju, Tang Rong, Luo Yuqin. Phase transformation and electrical resistivity of reduced ilmenite concentrate carbon-containing pellets[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 28-33. doi: 10.7513/j.issn.1004-7638.2024.01.005

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Phase transformation and electrical resistivity of reduced ilmenite concentrate carbon-containing pellets

doi: 10.7513/j.issn.1004-7638.2024.01.005

Wu Enhui^{1, 2
,},
Xu Zhong^{1, 2},
Li Jun^{1, 2},
Hou Jing^{1, 2},
Huang Ping^{1, 2},
Zhang Shiju^{1, 2},
Tang Rong¹,
Luo Yuqin¹

1.
College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China
2.
Vanadium and Titanium Resources Comprehensive Utilization Key Laboratory of Sichuan Province, Panzhihua 617000, Sichuan, China

Received Date: 2023-04-04
Publish Date: 2024-02-01

Abstract

Abstract

Using the graphite powder as a reducing agent, the phase transformation and electrical resistivity of the reduced products during the reduction process of carbon-containing ilmenite concentrate pellets were studied. The XRD analysis results indicate that the reduction process of carbon-containing ilmenite concentrate pellets mainly undergoes two processes: the reduction of iron oxide and the reduction of titanium oxide. Increasing the reduction temperature, prolonging the reduction time, and increasing the graphite ratio are all beneficial in deepening the reduction degree of titanium oxide. With a reduction time of 60 min and a graphite ratio of 33.6%, the phase transformation process of the reduction products with increased reduction temperature from 900 ℃ to 1550 ℃ was as follows: FeTiO₃→Fe+TiO₂→Fe+Ti_nO_2n−1(n≈1,2,3,4)→Fe+TiC. The electrical resistivity test results of the reduction products show that the reduction temperature and graphite ratio have a significant impact on the electrical resistivity of the reduced products, while the reduction time has a small impact. Under the conditions of graphite ratio of 33.6%, reduction temperature of 1300 ℃, and reduction time of 45 min, the electrical resistivity of the reduced product was 2.67 × 10⁻² Ω·cm.
- ilmenite concentrate,
- carbon-containing pellet,
- carbothermal reduction,
- phase,
- electrical resistivity

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References(13)

References

[1]	杨绍利. 钒钛材料[M]. 北京: 冶金工业出版社, 2007. Yang Shaoli. Vanadium titanium material[M]. Beijing: Metallurgical Industry Press, 2007.
[2]	Jia Hong, Lu Fusheng, Hao Bin. China titanium industry development report 2018[J]. Iron Steel Vanadium Titanium, 2019,40(3):158−163. (贾翃, 逯福生, 郝斌. 2018年中国钛工业发展报告[J]. 钢铁钒钛, 2019,40(3):158−163. doi: 10.7513/j.issn.1004-7638.2019.03.028 Jia Hong, Lu Fusheng, Hao Bin. China titanium industry development report 2018[J]. Iron Steel Vanadium Titanium, 2019, 40(3): 158-163. doi: 10.7513/j.issn.1004-7638.2019.03.028
[3]	Zhang Li, Hu Huiping, Wei Liangping, et al. Hydrochloric acid leaching behaviour of mechanically activated Panxi ilmenite (FeTiO₃)[J]. Separation & Purification Technology, 2010,73(2):173−178.
[4]	Zhang Li, Hu Huiping, Liao Zhi, et al. Hydrochloric acid leaching behavior of different treated Panxi ilmenite concentrations[J]. Hydrometallurgy, 2011,107(1-2):40−47. doi: 10.1016/j.hydromet.2011.01.006
[5]	Song Bing, Lü Xuewei, Xu Jian, et al. Effect of wet grinding on carbothermic reduction of ilmenite concentrate[J]. International Journal of Mineral Processing, 2015,142:101−106. doi: 10.1016/j.minpro.2015.02.014
[6]	Lü Xiangdong, Huang Run, Wu Qinzhi, et al. Non-isothermal reduction kinetics during vacuum carbothermal reduction of ilmenite concentrate[J]. Vacuum, 2019,160:139−145. doi: 10.1016/j.vacuum.2018.11.009
[7]	Lü Wei, Bai Chenguang, Lü Xuewei, et al. Carbothermic reduction of ilmenite concentrate in semi-molten state by adding sodium sulfate[J]. Powder Technology, 2018,340:354−361. doi: 10.1016/j.powtec.2018.09.043
[8]	Liao Xuefeng, Peng Jinhui, Zhang Libo, et al. Enhanced carbothermic reduction of ilmenite placer by additional ferrosilicon[J]. Journal of Alloys and Compounds, 2017,708:1110−1116. doi: 10.1016/j.jallcom.2017.03.113
[9]	Zhang Guohua, Gou Haipeng, Wu Kehan, et al. Carbothermic reduction of Panzhihua ilmenite in vacuum[J]. Vacuum, 2017,143:199−208. doi: 10.1016/j.vacuum.2017.06.016
[10]	Han Kexi. Analysis on electricity consumption for titanium slag smelting with prereduced concentrate pellets[J]. Iron Steel Vanadium Titanium, 2014,35(2):51−55. (韩可喜. 钛精矿预还原球团冶炼钛渣的电耗水平分析[J]. 钢铁钒钛, 2014,35(2):51−55. doi: 10.7513/j.issn.1004-7638.2014.02.010 Han Kexi. Analysis on electricity consumption for titanium slag smelting with prereduced concentrate pellets[J]. Iron Steel Vanadium Titanium, 2014, 35(2): 51-55. doi: 10.7513/j.issn.1004-7638.2014.02.010
[11]	Chuan Xiuyun, Chen Daizhang, Zhou Xunruo, et al. The electrical property and its mechanism of intercalation compounds of CuCl₂[J]. Acta Physica Sinica, 1999,48(6):159−164. (传秀云, 陈代璋, 周旬若, 等. CuCl₂-石墨层间化合物导电性能及其机理研究[J]. 物理学报, 1999,48(6):159−164. Chuan Xiuyun, Chen Daizhang, Zhou Xunruo, et al. The electrical property and its mechanism of intercalation compounds of CuCl₂[J]. Acta Physica Sinica, 1999, 48(6): 159-164.
[12]	Wu Enhui, Li Jun, Xu Zhong, et al. Physicochemical properties of metallized pellets of high-chromium vanadium-bearing titanomagnetite[J]. Iron & Steel, 2023,58(2):30−38. (吴恩辉, 李军, 徐众, 等. 高铬型钒钛铁精矿金属化球团的物化性能[J]. 钢铁, 2023,58(2):30−38. doi: 10.13228/j.boyuan.issn0449-749x.20220496 Wu Enhui, Li Jun, Xu Zhong, et al. Physicochemical properties of metallized pellets of high-chromium vanadium-bearing titanomagnetite[J]. Iron & Steel, 2023, 58(2): 30-38. doi: 10.13228/j.boyuan.issn0449-749x.20220496
[13]	Sen Wei, Xu Baoqiang, Yang Bin, et al. Research progress on preparation of TiC powders[J]. Light Metals, 2010,(12):44−48. (森维, 徐宝强, 杨斌, 等. 碳化钛粉末制备方法的研究进展[J]. 轻金属, 2010,(12):44−48. doi: 10.13662/j.cnki.qjs.2010.12.009 Sen Wei, Xu Baoqiang, Yang Bin, et al. Research progress on preparation of TiC powders[J]. Light Metals, 2010 (12): 44-48. doi: 10.13662/j.cnki.qjs.2010.12.009