Study on the technology of enhanced reduction-magnetic separation of titanium and iron from calcium-based vanadium extraction tailings

Gao Feng; Du Hao; Liu Biao; Wang Shaona; Liang Peng; Zhang Yi

doi:10.7513/j.issn.1004-7638.2023.01.015

Volume 44 Issue 1

Feb. 2023

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Gao Feng, Du Hao, Liu Biao, Wang Shaona, Liang Peng, Zhang Yi. Study on the technology of enhanced reduction-magnetic separation of titanium and iron from calcium-based vanadium extraction tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 84-91. doi: 10.7513/j.issn.1004-7638.2023.01.015

Citation:

Gao Feng, Du Hao, Liu Biao, Wang Shaona, Liang Peng, Zhang Yi. Study on the technology of enhanced reduction-magnetic separation of titanium and iron from calcium-based vanadium extraction tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 84-91. doi: 10.7513/j.issn.1004-7638.2023.01.015

Citation:

Gao Feng, Du Hao, Liu Biao, Wang Shaona, Liang Peng, Zhang Yi. Study on the technology of enhanced reduction-magnetic separation of titanium and iron from calcium-based vanadium extraction tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 84-91. doi: 10.7513/j.issn.1004-7638.2023.01.015

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Study on the technology of enhanced reduction-magnetic separation of titanium and iron from calcium-based vanadium extraction tailings

doi: 10.7513/j.issn.1004-7638.2023.01.015

Gao Feng^{1, 2
,},
Du Hao^{2
,
,},
Liu Biao²,
Wang Shaona²,
Liang Peng²,
Zhang Yi²

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2.
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received Date: 2022-12-01
Publish Date: 2023-02-28

Abstract

Abstract

In this paper, the direct reduction-magnetic separation method was used to recover Fe from vanadium titano-magnetite (VTM) tailings. Under the conditions of reduction temperature 1250 ℃, reduction time 2 h and reducing agent dosage 20% of the mass of the tailings, the metallization rate of pellets was 92.71%. After adding 5% CaCO₃ and prolonging the holding time to 6 h, the average diameter of Fe grains increased from 14.53 μm to 25.39 μm. By fitting the growth rate of Fe grains, it was found that the grains growth rate constant increased from 0.26 μm²/min to 1.45 μm²/min after adding CaCO₃. After magnetic separation, the direct reduced iron with TFe content of 90.72% and the titanium slag with TiO₂ content of 41.75% could be obtained. The recovery rate of Fe reached 91.05%, which greatly improved the resource utilization of VTM.
- vanadium titano-magnetite,
- calcium-based vanadium extraction tailings,
- direct reduction,
- magnetic separation,
- iron grain,
- growth rate

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References(17)

References

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