Phase transformations during the oxidation of calcium-containing titanium-vanadium slags and their influence on the formation of calcium vanadates

Садыхов, Г. Б.; Гончаров, К. В.; Goncharenko, T. V.; Olyunina, T. V.

doi:10.1134/s0036029513030105

Cited by 13 publications

(3 citation statements)

References 3 publications

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“…Wang concentrated on the impacts of vanadium slag stage design and roasting stage progress on the vanadium transformation rate. Zhang studied the no-isothermal kinetics and mechanism of vanadium slag roasting; Sadykhov studied the oxidative phase transition process of calcium-containing vanadium titanium slag and its effect on the formation of calcium vanadate. Li also investigated the roasting of high-calcium low-grade vanadium slag and calcification of vanadium slag, respectively.…”

Section: Vanadiummentioning

confidence: 99%

Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode

Xiong,

Li,

et al. 2024

Ind. Eng. Chem. Res.

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During recent years, emerging electrochemical energy storage systems beyond lithium-ion batteries have attracted extensive interest, in which large amounts of studies have focused on the investigation of various electrode materials and where vanadium-based materials have received great attention particularly. In this review, in order to systematically understand the upstream and downstream relationships of vanadium, an overview of the recent research on vanadium resources and extraction is presented. Vanadium extraction techniques are classified into three main groups: direct roasting, sodium salt roasting, and calcification roasting. The existing phase of vanadium slag and its change during roasting are summarized. Since vanadium-based polyanionic compounds have remarkable characteristics for sodium-ion batteries, the structure, electrochemical properties, and modification strategies of Na 3 V 2 (PO 4 ) 3 are focused on. Finally, perspectives about future directions of vanadium-based materials for sodium-ion batteries are proposed, inspiring further research interest in composition design. We believe that this review will serve as a motivation for further development of vanadium resources and expose their potential applications in energy storage.

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Section: Vanadiummentioning

confidence: 99%

Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode

Xiong,

Li,

et al. 2024

Ind. Eng. Chem. Res.

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“…The results show that there is a good correlation between S, O, and Ca, and combined XRD analysis indicated that there was an anhydrite formation in this area. The correlation between V, Ca, and O is good, and the vanadate product formed during roasting of stone coal is mainly calcium vanadate [19,20]. It can be deduced that, after roasting, some of the V in the mineral mica structure is released to form calcium vanadate, which is easily dissolved in acid, so that this part of V can be dissolved into the liquid by acid.…”

Section: Phase Analysis Of Roasted Productsmentioning

confidence: 99%

Effect of CaF2/CaO Composite Additive on Roasting of Vanadium-Bearing Stone Coal and Acid Leaching Kinetics

et al. 2017

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Abstract:In this paper, the composite additive of CaF 2 /CaO was used to extract vanadium from stone coal, and the effect of roasting and leaching kinetics were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal using the composite additive. The experimental results indicated that the roasted clinker can be obtained under the conditions of CaF 2 /CaO at a mass ratio of 2:3 and a total additive amount of 10 wt %, a roasting temperature 850 • C, and a roasting time of 90 min. The leaching rate of vanadium can reach 86.74%, which increased by 16.4% compared with that of blank roasting under the conditions including a leaching temperature of 950 • C, a sulfuric acid concentration of 15% (v/v), a leaching time of 2 h, and a ratio of liquid to solid of 3 mL/g. The phase transformation analysis indicated that the muscovite structure was effectively destroyed during the roasting process comparing with no additives, which provided the basis for vanadium dissociation. Roasting can promote the formation of calcium vanadate, which is beneficial to the leaching of vanadium. The vanadium leaching kinetic analysis indicated that the activation energy of the acid leaching reaction decreased from 42.50 KJ/mol in the blank roasting to 22.56 KJ/mol in the calcified roasting, and the reaction order, with respect to the sulfuric acid concentration, decreased from 1.15 to 0.85. Calcified roasting has a better mineral activation than blank roasting, which can accelerate the leaching of vanadium and reduce the dependence on high-temperature and high acid levels in the leaching process.

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“…However, Sodium salts roast-water leaching method with one or combination of NaCl, Na 2 CO 3 , and Na 2 SO 4 as additive followed by water leaching has several disadvantages such as high production, leaching residue, solid waste Na 2 SO 4 , wastewater treatment costs, complicated processes, the emission of corrosive gas HCl, Cl 2 , SO 2 and SO 3 , low vanadium oxidation ratio 82-86% and fusion agglomeration at temperature for low melting point of sodium salts, low CaO in vanadium slag requirements [12][13][14][15][16][17][18][19] and limit further application of this technology. In order to cope with these disadvantages, calcification roasting-acid leaching is an alternative to sodium salts roasting-water leaching.…”

Section: Introductionmentioning

confidence: 99%

Industrial Application of Large Rotary Kiln for Recovery of Vanadium from Vanadium Slag Added MnVO<sub>4</sub> in Calcium Roasting Process

Wang

Zhang

et al. 2017

ISIJ Int.

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Calcification roasting was an effective and environment-friendly way to extract vanadium from vanadium slag. This paper presents a comprehensive study on industrial application of calcium roasting process for large rotary kiln. The study has highlighted the importance of temperature stability using MnVO 4 for maximizing the recovery of the vanadium. The optimum conditions for recover 87.48-89.65% of vanadium (V) by using MnVO 4 at M·Fe concentration 1 ± 0.5%, CaO to V 2 O 5 ratio 0.58-0.64, MnVO 4 concentration 50-55%, feed rate 4.44 ± 0.56 kg/s, rotate speed 87-90 s/r, temperature of T2 865 ± 10°C, temperature control curves TE, TF, TG, negative pressure − 10 ± 5 Pa and volume flow ratio of the combustion air to coke oven gas (5-5.5). It was possible MnVO 4 was not only the additive but also play a key auxiliary effect for CaO with vanadium (V) to Ca 2 V 2 O 7 by studying on the oxidation reaction mechanism.

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Phase transformations during the oxidation of calcium-containing titanium-vanadium slags and their influence on the formation of calcium vanadates

Cited by 13 publications

References 3 publications

Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode

Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode

Effect of CaF2/CaO Composite Additive on Roasting of Vanadium-Bearing Stone Coal and Acid Leaching Kinetics

Industrial Application of Large Rotary Kiln for Recovery of Vanadium from Vanadium Slag Added MnVO<sub>4</sub> in Calcium Roasting Process

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Phase transformations during the oxidation of calcium-containing titanium-vanadium slags and their influence on the formation of calcium vanadates

Cited by 13 publications

References 3 publications

Low-Cost, the Key for the Commercialization of the Na3V2(PO4)3 Cathode

Low-Cost, the Key for the Commercialization of the Na3V2(PO4)3 Cathode

Effect of CaF2/CaO Composite Additive on Roasting of Vanadium-Bearing Stone Coal and Acid Leaching Kinetics

Industrial Application of Large Rotary Kiln for Recovery of Vanadium from Vanadium Slag Added MnVO<sub>4</sub> in Calcium Roasting Process

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Product

Resources

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Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode

Low-Cost, the Key for the Commercialization of the Na₃V₂(PO₄)₃ Cathode