Selective sulfuric acid cyclic leaching of vanadium from the calcification roasting pellets of vanadium titanomagnetite

Wang, Zhixiang; Peng, Zhonghui; Li, Yang; Zhu, Yongze; Xie, Keqiang

doi:10.1016/j.jmrt.2023.01.046

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…For the case of a spherical solid-particle reactant, the kinetic model for the process controlled by an interfacial chemical reaction was deduced as Equation ( 2) [17][18][19][20][21][22][23].…”

Section: Effect Of Temperature On the Leaching Kineticsmentioning

confidence: 99%

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Hydrothermal Leaching Kinetics of Vanadium from an Iron Vanadate Mineral Using Oxalic Acid

Shen,

Chen,

Yan

2023

Metals

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Hydrothermal leaching vanadium using oxalic acid is a novel method reported recently to overcome the serious environmental problems caused by traditional extracting processes. In view of its promising application potential, the hydrothermal leaching kinetics of vanadium from a concentrate mainly composed of Fe3−xVxO4 mineral via oxalic acid were investigated in this study. Firstly, the effects of the temperature and concentration of oxalic acid on the leaching behavior of vanadium were studied by measuring the leaching efficiency of vanadium at various times. Then, by fitting the measured leaching efficiency data to the proposed kinetic model, the leaching mechanism was analyzed and the rate-controlling step of the leaching process, the apparent activation energy, and the order of the chemical reactions were determined. Finally, a kinetic model was proposed to describe the present investigated leaching process. Detailed results are as follows: (1) an interfacial chemical reaction was the rate-controlling step of the present hydrothermal leaching process within temperatures ranging from 363 to 403 K, and the leaching efficiency was less than 85%; (2) the apparent activation energy of the interfacial chemical reaction was 45.6 kJ/mol; (3) the order of the interfacial chemical reaction to the concentration of oxalic acid was around 1.66.

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Section: Effect Of Temperature On the Leaching Kineticsmentioning

confidence: 99%

“…If the process is controlled by the inner diffusion step, the corresponding kinetic model can be expressed as Equation (3) [17][18][19][20][21][22][23].…”

Section: Effect Of Temperature On the Leaching Kineticsmentioning

confidence: 99%

Hydrothermal Leaching Kinetics of Vanadium from an Iron Vanadate Mineral Using Oxalic Acid

Shen,

Chen,

Yan

2023

Metals

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“…The other reactions showed negative Gibbs free energies in this temperature range, indicating that these reactions were thermodynamically feasible. Reactions (4), (6), and (11) show the conversion of V 3+ to V 5+ , and reactions (3), ( 7), (8), and ( 12)-( 14) show the reaction of vanadium pentoxide with calcium oxide and magnesium oxide to form calcium vanadate and magnesium vanadate. Reaction (5) shows the reaction of silicon dioxide with calcium oxide and magnesium oxide to form silicate, which is detrimental to the leaching of vanadium and should be avoided in the roasting process.…”

Section: Roasting Experimentsmentioning

confidence: 99%

“…Treating 1 ton of vanadium titanium iron concentrate can produce approximately 4.0 kg of V 2 O 5 , bringing about economic benefits of about CNY 400. The amount of drugs required to process 1 ton of vanadium titanium iron concentrate: (1) The amount of sulfuric acid used: 50 L/ton; (2) Dosage of flocculant: 3.33~4.44 g/ton; (3) Dosage of gelatin: 25 g~33.33 g/ton; (4) Dosage of Ca(OH) 2 : 10 kg/ton; (5) MgO dosage: 10 kg/ton; (6) The dosage of bentonite is 10 kg/ton. A total of 49.1 CNY/ton.…”

Section: Economic Analysismentioning

confidence: 99%

“…Vanadium slag extraction is the main method of vanadium extraction [5]. During vanadium extraction from vanadium slag, the slag is typically roasted to convert insoluble vanadium oxide into soluble vanadate [6][7][8]. Currently, sodium roasting-water leaching [9,10], calcium roasting-acid leaching [11,12], and salt-free roasting-acid leaching processes [13] are mainly used for vanadium extraction.…”

Section: Introductionmentioning

confidence: 99%

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Vanadium–Titanium Magnetite Concentrate, Calcium–Magnesium Composite Roasting and Sulfuric Acid Leaching for Vanadium Extraction from Pellets

Peng

Wang

Han

et al. 2023

Metals

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This paper investigated a pellet ore production process in which vanadium was extracted from vanadium and titanium magnetite concentrates using sulfuric acid leaching. Calcium and magnesium were added to the iron ore concentrate during pellet production to produce calcium vanadate and magnesium vanadate after roasting. The pellets were leached with sulfuric acid solution to extract V5+. The resulting pellets had a compressive strength of 3375 N after primary roasting, a good pellet morphology after acid leaching, and simple liquid–solid separation. Under the optimal experimental conditions, the vanadium leaching rate in the pellets reached 77.86%, while the iron leaching rate was only 1.17%. The pellets did not fragment, which was an improvement upon existing vanadium extraction methods. The strength of the pellets after vanadium extraction decreased to 563 N, but after secondary roasting, the compressive strength of the pellets reached 2578 N, which was suitable for blast furnace ironmaking. The roasting and acid leaching experiments showed that the vanadium extraction process resulted in suitable pellet properties. The use of low compound additives can effectively improve the leaching effect, while avoiding the previous problems of too many additives, pellet iron grade reduction, or the pursuit of high vanadium extraction rate pellet breakage and serious high secondary use process costs.

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From Waste to Wealth: Current Advances in Recycling Technologies for Metal Recovery from Vanadium-Titanium Magnetite Tailings

Hu,

Yang,

et al. 2024

J. Sustain. Metall.

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Selective sulfuric acid cyclic leaching of vanadium from the calcification roasting pellets of vanadium titanomagnetite

Cited by 8 publications

References 36 publications

Hydrothermal Leaching Kinetics of Vanadium from an Iron Vanadate Mineral Using Oxalic Acid

Hydrothermal Leaching Kinetics of Vanadium from an Iron Vanadate Mineral Using Oxalic Acid

Vanadium–Titanium Magnetite Concentrate, Calcium–Magnesium Composite Roasting and Sulfuric Acid Leaching for Vanadium Extraction from Pellets

From Waste to Wealth: Current Advances in Recycling Technologies for Metal Recovery from Vanadium-Titanium Magnetite Tailings

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