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A Novel Technology to Prepare FeVO4 from TiCl4 Refining Tailings

  • METALLURGY OF NONFERROUS METALS
  • Published:
Russian Journal of Non-Ferrous Metals Aims and scope Submit manuscript

Abstract

In this work, vanadium is extracted from TiCl4 refining tailings by a clean metallurgical process and FeVO4 is prepared by adjusting the pH of acid leaching solution. The main factors affecting the leaching of vanadium from tailings are leaching temperature, solid-to-liquid ratio, hydrochloric acid concentration and type of oxidant. Under the optimal leaching conditions, when the leaching temperature is 30°C, the solid-liquid ratio is 1 : 4, the hydrochloric acid concentration is 400 g/L, and the oxidant is H2O2, the leaching rate of V can reach 97.1% after 60 min of reaction. The main factors affecting the precipitation of FeVO4 are the precipitation temperature, the initial vanadium concentration, the pH endpoint value of acid leaching solution and the addition amount of H2O2 oxidant. Under the optimal precipitation conditions, when the precipitation temperature is 40°C, the initial vanadium concentration is 5 g/L, the pH endpoint value of the acid leaching solution is 1.4, the addition amount of H2O2 oxidant is 6%, the precipitation rate of V can reach 95.4% after 60 min. By adjusting the pH value of precipitation filtrate, metal ions such as Fe, Al, Ca and Mg precipitate to form neutralization slag. The neutralization filtrate can be prepared NaCl crystals by evaporation crystallization, and the mother liquor of evaporation crystallization is returned to acid leaching for use. Acid leaching residue (TiO2 content is 55.42%) can be recycled as high-titanium raw material. This study can properly deal with the environmental pollution caused by the stacking of TiCl4 refining tailings.

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Funding

This research was supported by the National Natural Science Foundation of China (51874094), the Basic scientific research business expenses of Northeastern University (N182502041).

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Authors and Affiliations

  1. Key Laboratory of Ecological Utilization of Multi-Metal Intergrown Ores of the Ministry of Education, School of Metallurgy, Northeastern University, 110819, Shenyang, China

    Qu Jinwei, Zhang Tingan, Niu Liping, Lv Guozhi, Zhang Weiguang & Chen Yang

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  1. Qu Jinwei
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  2. Zhang Tingan
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  3. Niu Liping
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  4. Lv Guozhi
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  5. Zhang Weiguang
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  6. Chen Yang
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Correspondence to Zhang Tingan.

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Jinwei, Q., Tingan, Z., Liping, N. et al. A Novel Technology to Prepare FeVO4 from TiCl4 Refining Tailings. Russ. J. Non-ferrous Metals 62, 157–164 (2021). https://doi.org/10.3103/S1067821221020127

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  • DOI: https://doi.org/10.3103/S1067821221020127

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