The technology of extracting vanadium from stone coal in China: History, current status and future prospects

Zhang, Yimin; Bao, Shenxu; Liu, Tao; Chen, Tiejun; Huang, Jing

doi:10.1016/j.hydromet.2011.06.002

Cited by 375 publications

(142 citation statements)

References 31 publications

Supporting

Mentioning

138

Contrasting

Unclassified

Order By: Relevance

“…Since V(III) and V(IV) have similar ionic radius and electronegativity, and the same coordination number to Al(III); they readily replace Al(III) from dioctahedral structure as isomorphism in muscovite [19]. The correlation between Al and V distribution indicates the vanadium in the stone coal exists as isomorphism in muscovite, which is the most representative and prevalent occurrence of vanadium in stone coal [3]. …”

Section: Measurement Methodsmentioning

confidence: 99%

“…The gross reserve of vanadium in terms of V 2 O 5 in stone coal accounts for more than 87% of the domestic reserve of vanadium [2]. However, most vanadium in stone coal exists as V(III) replacing Al(III) from dioctahedral structure as isomorphism in mica group minerals [3], which is generally recovered by roasting with sodium additive at a high temperature [4]. After that, the vanadium is liberated from crystal structure and converted to water or acid soluble vanadate [5], which is subsequently recovered by water leaching and/or acid leaching, ion purification, vanadium precipitation, and calcination [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Zhao

Chen

et al. 2018

Minerals

View full text Add to dashboard Cite

Abstract:The vanadium occurrence in stone coal, water leaching, and acid leaching residue was investigated by energy dispersive spectrometer (EDS) mapping and point analysis, and the vanadium transitions during roasting-leaching of stone coal were revealed. In the roasting process, vanadium-bearing muscovite is converted to K-Na-feldspar, accompanying the liberation of vanadium. Most liberated vanadium reacts with sodium salt to generate water-soluble sodium vanadate, some reacts with calcite in stone coal to form water-insoluble calcium vanadate, and other liberated vanadium exists as free vanadium oxide. However, for coarse muscovite grains, the reaction of muscovite converted to K-Na-feldspar only occurs at the outer margin of muscovite grains, and the vanadium in the interior of muscovite grains is not liberated. During water leaching, the sodium vanadate is leached out. The calcium vanadate and free vanadium oxide are dissolved out in the process of acid leaching, and the vanadium, presenting in muscovite grains surrounded by K-Na-feldspar, still remains in the acid leaching residue. Two suggestions, including optimization of grinding-classification process and adopting microwave roasting, were proposed for improving vanadium recovery according to the vanadium transition rules.

show abstract

Section: Measurement Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Zhao

Chen

et al. 2018

Minerals

View full text Add to dashboard Cite

show abstract

“…Vanadium-bearing shale is widely distributed in many southern provinces of China and is an important vanadium resource in China [3]. To meet the increasing demand of vanadium resources, vanadium extraction from vanadium-bearing shale has become essential.…”

Section: Introductionmentioning

confidence: 99%

“…Iveta Štyriaková et al [19] studied the bioleaching of phlogopite (K 2 (Si 6 Al 2 )Mg 6 O 20 (OH) 4 ) with A. ferrooxidans and a solution of 1550 mg/L Mg was obtained. Tariq M. Bhatti et al [20,21] investigated the structural alteration of phlogopite and biotite (K(Mg,Fe 2+ ) 3 AlSi 3 O 10 (OH,F) 2 ) during weathering by A. ferrooxidans, finding that both minerals were partly altered to vermiculite when ferrous sulfate was added as an energy source because the formation of jaroite caused selective loss of K + from interlayer positions of minerals, and no structural alterations were detected when adding sulfur as the energy source. The studies about bioleaching of vanadium are focused on the recovery of vanadium from industrial wastes such as spent catalysts and slag fly ash, in which vanadium exists as oxides, and considerable vanadium recovery (80%-100%) was obtained when bioleaching of these wastes by A. ferrooxidans [22][23][24] occurred.…”

Section: Introductionmentioning

confidence: 99%

Vanadium Bioleaching Behavior by Acidithiobacillus ferrooxidans from a Vanadium-Bearing Shale

et al. 2018

Self Cite

View full text Add to dashboard Cite

This study investigated bioleaching behavior of vanadium from a vanadium-bearing shale using Acidithiobacillus ferrooxidans (A. ferrooxidans). Results showed a maximum recovery of 62% vanadium in 1.2-day bioleaching, which was 22.45% higher than the controls. Then, the vanadium leaching efficiency decreased significantly, only 24% of that was obtained on the tenth day. The vanadium extraction in 1.2 days was mainly attributed to the dissolution of vanadium in free oxides of shale. Fe 3+ produced by A. ferrooxidans promoted the dissolution process. X-ray diffraction (XRD) patterns of the leached residues confirmed the generation of jarosite. SEM-EDS analysis of the residues indicated that jarosite adsorbed on the shale and inhibited the further dissolution of vanadium. The relevance of V, Fe, S, O was quite good in the energy disperse X-ray spectrometry (EDS) element mapping of jarosite, and acid-washing of the jarosite resulted in 31.6% of the vanadium in the precipitates desorption, indicating that the decrease of vanadium leaching efficiency in bioleaching process was caused by both adsorption and co-precipitation with jarosite.

show abstract

“…In recent years, researchers have developed new technologies [3][4][5][6][7][8] , such as oxidizing roastingacid leaching-salt production-extraction-deposition with ammonium-thermal decomposition, oxidizing roasting-acid leaching-extraction-deposition with ammonium-thermal decomposition, and oxidizing roasting-acid leaching and purification-deposition with ammonium-thermal decomposition. In contrast with the classical technology, these technologies have advantages of higher recovery, simpler flowsheet and lower cost.…”

Section: Introductionmentioning

confidence: 99%

Recovery of vanadium from alkaline leaching solution from roasted stone coal

Long¹,

Feng²,

Zhang³

et al. 2014

ScienceAsia

View full text Add to dashboard Cite

A two-stage purification-extraction-stripping-NH 4 NO 3 technology to precipitate V 2 O 5 was developed based on the characteristics of the alkaline leaching solution produced from roasted stone coal. Factors influencing purification, extraction, stripping, and NH 4 VO 3 precipitation were studied. Vanadium can be recovered effectively from alkaline leaching solutions using this technology. The purity of the V 2 O 5 product was 99.6%, thereby meeting national standards. The overall vanadium recovery was 90.9%.

show abstract

The technology of extracting vanadium from stone coal in China: History, current status and future prospects

Cited by 375 publications

References 31 publications

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Vanadium Bioleaching Behavior by Acidithiobacillus ferrooxidans from a Vanadium-Bearing Shale

Recovery of vanadium from alkaline leaching solution from roasted stone coal

Contact Info

Product

Resources

About