Development of a Production Scheme for Utilizing Vanadium Pentoxide Hydrometallurgical Production Waste

Kologrieva, Ulyana; Волков, А. И.; Kirichenko, A. S.; Ermolov, V. M.; Mirakova, M. G.

doi:10.1007/s11015-019-00836-5

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Vanadium converter slag is obtained from this cast iron in an oxygen converter, which is a product for hydrometallurgical processing [ 4 , 5 ]. The production is characterized by a large amount of waste; it does not provide for complex processing of slag [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants

2022

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The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1–x–y–zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2–x–yFexNiySiO4). The processing of ash made it possible to significantly increase the concentration of vanadium and convert it into more soluble compounds. Vanadium amount increased from 16.2 in ash to 41.4–48.1 V2O5 wt% in slag. The solubility of vanadium was studied during aqueous leaching and in solutions of H2SO4 and Na2CO3. The highest solubility of vanadium was seen in H2SO4 solutions. The degree of extraction of vanadium into the solution during sulfuric acid leaching of ash was 18.9%. In slag, this figure increased to 72.3–96.2%. In the ash sample, vanadium was found in the form of V5+, V4+ compounds, vanadium oxides VO2 (V4+), V2O5 (V5+), and V6O13, and nickel orthovanadate Ni3(VO4)2 (V5+) was found in it. In the slag sample, vanadium was in the form of compounds V5+, V4+, V3+, and V(0÷3)+; V5+ was presented in the form of compounds vanadate NaMg4(VO4)3, NaVO3, and CaxMgyNaz(VO4)6; V3+ was present in spinel (FeV2O4) and substituted karelianite (V2–x–y–zFexAlyCrzO3). In the obtained slag samples, soluble forms of vanadium are due to the presence of sodium metavanadate (NaVO3), a phase with the structure of granate CaxMgyNaz(VO4)6 and (possibly) substituted karelianite (V2–x–y–zFexAlyCrzO3). In addition, spinel phases of the MgAl2O4 type beta-alumina (NaAl11O17), nepheline (Na4–xKxAl4Si4O16), and lepidocrocite (FeOOH) were found in the slag samples.

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Section: Introductionmentioning

confidence: 99%

Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants

2022

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“…The rest of the vanadium is lost with the waste sludge. Such sludge contains 1.5-4.5 wt.% V 2 O 5 exceeding V content in initial titanomagnetites [23,27,28]. EVRAZ Vanadiy Tula has accumulated more than 80 million tons of this waste [23].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Vanadium-Containing Sludge Oxidation Roasting Process for Vanadium Extraction

Kologrieva

Волков

Zinoveev

et al. 2021

Metals

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Vanadium containing sludge is a by-product of vanadium pentoxide obtained by hydrometallurgical methods from vanadium slag that can be estimated as a promising technogeneous raw material for vanadium production. The phase analysis of vanadium-containing sludge by the X-ray diffraction method showed that it contains vanadium in spinel form (FeO∙V2O3). The various oxidation roasting methods for sludge treatment were studied for increasing vanadium extraction into the solution. It showed that the most effective additive is 1% CaCO3 at a roasting temperature of 1000 °C. Oxidation roasting of vanadium-containing sludge with the additive led to an increase in the acid-soluble form of V2O5 from 1.5% to 3.7% and a decrease in the content of FeO∙V2O3 from 3% to 0.4%. These results confirm the efficiency of the application of oxidation roasting to convert vanadium compounds into acid-soluble forms. The conversion mechanism of spinel to acid-soluble phases during oxidation roasting with additives was investigated by thermogravimetric analysis and thermodynamic simulation. It showed that the formation of acid-soluble calcium vanadates during oxidation roasting without additives occurs at temperatures above 800 °C while CaCO3 addition allows one to reduce this temperature to 600 °C.

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“…Such slurries contain 1.5-4.5 wt. % V2O5, which exceeds the vanadium content in the initial titanomagnetites [23,[27][28]. EVRAZ Vanadiy Tula has accumulated more than 80 million tons of this waste [23].…”

Section: Introductionmentioning

confidence: 99%

The Investigate of Vanadium-Containing Slurry Oxidation Roasting Process for Vanadium Extraction

Kologrieva¹,

Волков²,

Zinoveev³

et al. 2020

Preprint

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Vanadium containing slurry is a by-product of vanadium pentoxide by hydrometallurgical methods from vanadium slag. It is promising technogenic raw material for vanadium production. The phase analysis of vanadium-containing slurry by X-ray diffraction method has shown that it contains vanadium in spinel form (FeO∙V2O3). The various oxidation roasting methods for slurry treatment have been studied for increasing vanadium extraction into the solution. It has shown that the most effective additive is 1% CaCO3 at a roasting temperature of 1000 °C. The oxidation roasting of vanadium-containing slurry with the additive led to increase acid-soluble form of V2O5 from 1.5 to 3.7% and decrease the content of FeO∙V2O3 from 3 to 0.4%. These results have confirmed the efficiency of the application of oxidation roasting to convert vanadium compounds into acid-soluble forms. The conversion mechanism of spinel to acid-soluble phases during oxidation roasting with additives was investigated by thermogravimetric analysis and thermodynamic simulation. It has shown that the formation of acid-soluble calcium vanadates during oxidation roasting without additives occurs at temperatures above 800 °C, but СаСО3 addition allows to reduce this temperature to 600 °C.

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Development of a Production Scheme for Utilizing Vanadium Pentoxide Hydrometallurgical Production Waste

Cited by 6 publications

References 2 publications

Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants

Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants

Investigation of Vanadium-Containing Sludge Oxidation Roasting Process for Vanadium Extraction

The Investigate of Vanadium-Containing Slurry Oxidation Roasting Process for Vanadium Extraction

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