Recovery of vanadium from vanadium slag with high phosphorus content via recyclable microemulsion extraction

Guo, Yun; Li, Hong‐Yi; Shen, Shuo; Wang, Chengjie; Diao, Jiang; Xie, Bing

doi:10.1016/j.hydromet.2020.105509

Cited by 20 publications

(4 citation statements)

References 40 publications

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“…The bonds between vanadium and oxygen can be divided into three types: 1) symmetric stretching vibration of the threefold coordinated oxygen atoms in V-O-V at 690-710 cm À1 , 2) in-phase tension vibration of the V ═ O bond at 995 cm À1 , and 3) bending vibration of the doubly coordinated oxygen atoms in V-O-V at 480 cm À1 . [53][54][55] In this study, the first type of bond was the main structural unit in the melts. Moreover, the combined capacity of Si 4þ and O 2À was stronger than that of V 3þ and O 2À .…”

Section: Structure Propertymentioning

confidence: 99%

Evolution of Viscosity and Structure Property during Aluminothermic Reduction of Vanadium‐Enriched Slag

Zhang

Chen

Sun

2022

steel research int.

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Aluminum dross is a promising reductant for extracting vanadium to enable the direct production of ferrovanadium alloy in pre-reduced vanadium-rich slag (PVS). The evolution of the viscosity of PVS is measured with various A/M ratios (w()), representing different reduction stages. The compositions and structural properties of the melts are analyzed using X-ray powder diffraction, scanning electron microscopy, and Raman spectroscopy. The results show that with an increase in the mass ratio of Al 2 O 3 to (FeOþCr 2 O 3 þMnOþV 2 O 3 þAl 2 O 3 ) in the slag transformed from a solid-liquid mixture to a single liquid phase at 1873 K. When A/M increases from 0.29 to 0.53, Q 0 and Q 1 polymerize into Q 2 , resulting in a slow increase in viscosity from 0.091 to 0.158 Pa s. As A/M further increased to 1.00, Q 0 disappeared, Q 3 appeared, and the fraction of Al-O-Si increased to 37.7%, indicating that the simple aluminosilicate structural units are polymerized into complex structural units. Meanwhile, the viscosity increases to 0.338 Pa s. Al 2 O 3 acts as a network former and strengthens the degree of polymerization of the melt. The variation ranges of the apparent activation energy, structural complexity, and the average number of non-bridging oxygen are 139.23-215.12 kJ mol À1 , 0.57-2.97, and 2.16-1.05, respectively.

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Section: Structure Propertymentioning

confidence: 99%

Evolution of Viscosity and Structure Property during Aluminothermic Reduction of Vanadium‐Enriched Slag

Zhang

Chen

Sun

2022

steel research int.

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“…Vanadium is an important strategic resource that is widely used in steel, aviation, chemical industry, and vanadium battery due to its special physical and chemical performances (Mirazimi et al, 2013;Xue et al, 2017;Guo et al, 2020;Liu et al, 2021). In addition to vanadium-bearing stone coal, vanadiumtitanium magnetite is a main raw material for vanadium extraction (Gilligan and Nikoloski, 2020).…”

Section: Introductionmentioning

confidence: 99%

Selective extraction of vanadium from vanadium-titanium magnetite concentrates by non-salt roasting of pellets-H<sub>2</sub>SO<sub>4</sub> leaching process

Luo¹,

Che²,

Wang³

et al. 2021

Physicochem. Probl. Miner. Process.

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In this work, a novel process of pellet non-salt roasting and H2SO4 leaching was proposed for the selective extraction of vanadium from vanadium-titanium magnetite concentrate. Vanadium can be leached but the iron impurity was maintained in the pellets. Moreover, the leached pellets can meet the quality requirements of the iron-making process after secondary roasting, realizing comprehensive utilization. The maximal vanadium leaching efficiency was up to 60.3%, whereas 0.17% of the iron impurity was leached. The optimum conditions of pellet roasting and leaching were obtained by singlefactor experiments. The X-ray diffraction and scanning electron microscopy-energy disperse X-ray spectrometry analyses showed that the vanadium iron spinel can be oxidized and decomposed into Fe2O3 and vanadate during the roasting process. Given that dilute sulfuric acid can react with vanadate without reacting with Fe2O3 in the leaching process, selective vanadium extraction was realized. This work provides new insights into the industrial production of vanadium-titanium magnetite concentrate involving the direct extraction of vanadium.

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“…Compared to the conventional extractants , microemulsion system has various excellent properties, such as the nanometer scale, large speci c surface area, high selectivity and rapid coalescence [34,35]. In view of the advantages of microemulsion extraction (ME), more and more researchers have applied it to the elds of food, medicine, sewage treatment, heavy metal recovery and protein extraction [36,37,38,39].…”

Section: Introductionmentioning

confidence: 99%

A novel method to extract juglone from Juglans mandshurica waste branches using a water-in-oil microemulsion

Meng

Tian

et al. 2021

Preprint

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Pruning of Juglans mandshurica produces a lot of waste branches which are potentially rich source of juglone. However, they are usually discarded as waste. Given that, the water-in-oil microemulsion was proposed, aiming at developing a novel and efficient microemulsion-based microwave-assisted extraction（MBMAE）method. By which juglone in the Juglans mandshurica waste branches could be obtained. In our experiment, the waste branches powder was added to the MBMAE system. Under the best microemulsion system: (tween 80: n-propanol : n-hexane : water＝27% : 13.5% : 4.5% : 55%), the PH of the microemulsion solution of 5.6, microemulsion - Juglans mandshurica branches powder of 20:1 (mL/g), operating temperature of 40°C and operating time of 63 s, operating power of 400 W, the juglone yield was 4.58 mg/g. The results were that the extraction yield applying the MBMAE method were 1.86-fold and 6.65-fold that of microwave-assisted extraction applying ethanol (Ethanol-MAE) and heat reflux extraction by ethanol (Ethanol-HRE), respectively. Obviously, the MBMAE method could be used as an alternative to traditional extraction methods to extract juglone.Statement of Novelty A large number of waste branches from Juglans mandshurica pruning are often discarded as waste. Based on the concept of green development, this work proposes for the first time the extraction and utilization of juglone from the waste branches of Juglans mandshurica. However, a certain problem such as low efficiency, high cost, and complicated operation is existing in traditional extraction method for juglone. Consequently, a special microemulsion system for juglone was established for the first time, and on this basis, the application of MBMAE method to the extraction of juglone was also proposed for the first time. It provides data support for the extraction of juglone from other materials or plants.

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Recovery of vanadium from vanadium slag with high phosphorus content via recyclable microemulsion extraction

Cited by 20 publications

References 40 publications

Evolution of Viscosity and Structure Property during Aluminothermic Reduction of Vanadium‐Enriched Slag

Evolution of Viscosity and Structure Property during Aluminothermic Reduction of Vanadium‐Enriched Slag

Selective extraction of vanadium from vanadium-titanium magnetite concentrates by non-salt roasting of pellets-H<sub>2</sub>SO<sub>4</sub> leaching process

A novel method to extract juglone from Juglans mandshurica waste branches using a water-in-oil microemulsion

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