Study on desulfurization using ammonium bicarbonate and vanadium extraction by acid leaching from calcified vanadium tailings

Wang Jun; Sun Qiwu; Wang Andong; Wu Yongchuan; Chen Haitao; Zhu Xuejun; Chen Dandan; Mao Xuehua; Zhang Yi; Deng Jun

doi:10.7513/j.issn.1004-7638.2023.02.006

Volume 44 Issue 2

Apr. 2023

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Wang Jun, Sun Qiwu, Wang Andong, Wu Yongchuan, Chen Haitao, Zhu Xuejun, Chen Dandan, Mao Xuehua, Zhang Yi, Deng Jun. Study on desulfurization using ammonium bicarbonate and vanadium extraction by acid leaching from calcified vanadium tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 40-47. doi: 10.7513/j.issn.1004-7638.2023.02.006

Citation:

Wang Jun, Sun Qiwu, Wang Andong, Wu Yongchuan, Chen Haitao, Zhu Xuejun, Chen Dandan, Mao Xuehua, Zhang Yi, Deng Jun. Study on desulfurization using ammonium bicarbonate and vanadium extraction by acid leaching from calcified vanadium tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 40-47. doi: 10.7513/j.issn.1004-7638.2023.02.006

Citation:

Wang Jun, Sun Qiwu, Wang Andong, Wu Yongchuan, Chen Haitao, Zhu Xuejun, Chen Dandan, Mao Xuehua, Zhang Yi, Deng Jun. Study on desulfurization using ammonium bicarbonate and vanadium extraction by acid leaching from calcified vanadium tailings[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 40-47. doi: 10.7513/j.issn.1004-7638.2023.02.006

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Study on desulfurization using ammonium bicarbonate and vanadium extraction by acid leaching from calcified vanadium tailings

doi: 10.7513/j.issn.1004-7638.2023.02.006

1.
Sichuan Metallurgical Geological Exploration Bureau 601 Brigade, Panzhihua 617000, Sichuan, China
2.
College of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, Sichuan, China

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Received Date: 2022-10-09
Publish Date: 2023-04-30

Abstract

Abstract

In view of the current situation that it is difficult to achieve effective utilization of vanadium from calcified vanadium extraction tailings, a process of desulfurization using ammonium bicarbonate followed by acid leaching was proposed. The effects of reaction temperature, adding amount of ammonium bicarbonate and liquid-solid ratio on desulfurization were studied. In the subsequent process of acid leaching, the effects of leaching temperature, pH value and liquid-solid ratio on the vanadium extraction were also studied. The surface response method was used to optimize the conditions and the best reaction parameters was obtained. The results show that the desulfurization rate reaches 94.58% when the reaction temperature is 30 ℃, the ratio of ammonium bicarbonate to the theoretical value of desulfurization is 1.4∶1 and the ratio of liquid to solid (L∶S) is 5∶1. Under the conditions of acid leaching temperature of 30 ℃, liquid-solid ratio (L∶S) of 6∶1 and pH value of 1.0, the vanadium leaching rate of tailing slag is 56.79%. According to the surface response test results, the optimal process parameters were obtained containing leaching pH value of 0.977, leaching temperature of 39.36 ℃ and liquid-solid ratio of 4.455∶1. Under these conditions, the predicted value of vanadium leaching rate is 56.80%, and the confirmatory experiment shows that the leaching rate is 56.77%, which is only 0.03% lower than the former. This process has the advantages of simple operation, high desulfurization rate and good vanadium extraction effect, which is conducive to the effective utilization of calcified vanadium extraction tailings and has a good development prospect.
- calcified vanadium extraction tailings,
- vanadium extraction,
- ammonium bicarbonate,
- desulfurization,
- acid leaching,
- response surface method,
- leaching rate

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References(14)

References

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