Separation and recovery of vanadium and iron from oxalic-acid …
A novel process is proposed to selectively leach vanadium and separate molybdenum from the vanadium-molybdenum residue (VMR) in the weakly alkaline solution, which is built on carbonation leaching. The optimal leaching conditions of the 16 wt% sodium carbonate, leaching temperature of 25℃, leaching time of 4 h, and liquid …
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Minerals | Free Full-Text | The Prospect of Recovering Vanadium …
Vanadium (V), nickel (Ni), and molybdenum (Mo) are all important strategic metal resources and are widely used in steel, electronics, aerospace, the military, industry, and so on [1,2,3].Key metals in black shale have received growing attention as global ore grades have continued to decline [4,5].Stone coal is a vanadium-bearing shale (total …
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Extraction of vanadium from stone coal by roasting in a fluidized …
The representative process is roasting with sodium chloride under oxidizing conditions to convert vanadium in stone coal to acid-soluble salt [13]. In this process, the roasting plays a critical role in oxidizing V(III) to V(IV) and V(V), which is determinative to the available total vanadium recovery ratio and is thus the rate-limiting step.
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Decarbonization kinetics for fluidized roasting of vanadium …
Vanadium-bearing carbonaceous shale (stone coal) is an important vanadium resource [1,2,3].In China, 87% of the total vanadium is stored in carbonaceous shale, reaching 118 million tons (estimated by V 2 O 5), which is 6.7 times the reserves contained in vanadium-titanium magnetite [3,4,5].However, a high carbon content (10 ~ …
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An environmentally-friendly technology of vanadium extraction …
After roasting stone coal at 850 °C for 3 h, vanadium in stone coal could be leached with NaOH solution, and the leaching degree of vanadium reached 88.38%. (2) …
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Vanadium extraction from stone coal using a novel two-stage …
Conclusion. A novel technology, Two-Stage Roasting (TSR) process, was presented to promote the efficiency of vanadium leaching from stone coal. At the optimal condition of first-stage roasting temperature 650 °C, roasting time 1 h, air gas and second-stage roasting temperature 950 °C, roasting time 3 h, 30% oxygen concentration gas, …
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Selective recovery of vanadium from red mud by leaching with …
It is worth noting that the impurity of iron ions could severely restrict the subsequent recovery and separation of vanadium from the acid leaching solution by using solvent extraction [29], [30]. Therefore, the selective leaching of vanadium and separation iron in the leaching process is the key step for recovery of vanadium from red mud.
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A literature review on leaching and recovery of vanadium
During the roasting process, the vanadium-bearing muscovite with quartz was converted to feldspar group minerals (albite, orthoclase and anorthite). The findings could produce some potential methods for recovery of vanadium from stone coal.
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Vanadium Extraction from Stone Coal Using a Novel
Recovery of Vanadium and Nickel from a High CaCO_3 Containing Petroleum Coke Ash by Roasting and Acidic Leaching. In this study, it was aimed to extract vanadium (V) and nickel (Ni) from a petroleum coke ash (PCA) using a roasting process without additives, followed by leaching with sulfuric acid (H_2SO_4). The….
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Phase transformations of vanadium recovery from refractory …
In this study, the e ectiveness of the novel NaOH molten. ff. roasting and water leaching technology for vanadium recovery from refractory stone coal was investigated. Many …
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Vanadium Transitions during Roasting-Leaching Process of …
For the process of vanadium extraction from stone coal, the vanadium recovery by the roasting-leaching procedure is around 65–75%, while for other procedures, such as ion exchange, solvent ...
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Bioleaching performance of vanadium-bearing smelting ash by
The compositional analysis showed that the fraction of reducible, oxidizable, and acid-soluble was transferred into the leaching liquor. Therefore, as the alternative to the chemical/physical process, an efficient bioleaching process was proposed to enhance the recovery of vanadium from the vanadium-bearing smelting ash.
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Phase transformations of vanadium recovery from refractory …
Historical Collection. In this study, a novel NaOH molten roasting and water leaching technology, an eco-friendly process with good selectivity and good availability, was …
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Preconcentration Approach of Mica Vanadium-Bearing Stone Coal …
Then we chose a suitable method to process the stone coal and designed an enrichment process flowsheet. Also, gravity separation and grading tests were conducted to study a new pre-concentration approach of mica vanadium-bearing stone coal. ... Vanadium Recovery from Stone Coal through Roasting and Flotation, Trans. …
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Remediation of the vanadium slag processing residue and recovery …
During the processing of the vanadium slag, the recovery yield of vanadium is typically in the range from 65% to 85%. The undesirable conditions for the element transfer and diffusion lead to a uncompleted recovery for vanadium and other metals including iron, chromium and titanium, which remain in the vanadium slag processing …
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Clean and efficient extraction of vanadium from vanadium slag: …
Manganese in vanadium slag plays an important role in the clean and efficient extraction of vanadium, attributed to the effect of manganese content on the phase of vanadium slag and the synergistic effects between manganese and roasting additives during the roasting process. In this study, remelting and crystallization method were …
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Synergistic solvent extraction of vanadium from leaching solution …
Vanadium compounds have gained considerable demands in several alloys, catalysts and batteries to improve product properties [1], [2]. The hydro-leaching process has commonly been adopted to recover vanadium from primary resources, such as ores, metallurgical slags and petroleum residues [2], and secondary source spent catalyst [3].
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A Method to Extract Vanadium from HIsmelt Reduction Slag: In
The HIsmelt smelting reduction process is an efficient direct reduction process for smelting vanadium titanomagnetite ores. About 80% vanadium is enriched in the reduction slag, however, due to the low vanadium and high calcium content in reduction slag, it is difficult to extract the vanadium economically. In this study, a process …
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Reduction roasting–magnetic separation of vanadium
"Iron recovery–vanadium extraction" process can concentrate Fe, V and Ti, but the process has shortcomings such as high energy consumption, foamed slag and low recovery rate of vanadium. "Vanadium extraction–iron recovery" process is a new process to treat vanadium–titanium magnetite ore, which extracts V 2 O 5 and then …
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Leaching Kinetics of Vanadium from Calcium-Roasting High …
1. Introduction. Vanadium and its compounds are widely used in petrochemical industry, catalyst, and iron and steel because of their excellent physicochemical properties. 1−5 In China, the main resources for vanadium recovery are vanadium titanomagnetite, uranium-bearing sandstone, bauxite, stone coal, and so forth. 6−8 A byproduct named …
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Efficient Separation and Recovery of Vanadium (V) from …
At present, the main extraction method of vanadium is the process of pretreatment, leaching, separation, and enrichment according to the physical, …
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A review of processing technologies for vanadium extraction from stone coal
In this process, two-step was performed: first adding kerosene and pinitol oil (C 10 H 17 OH) to remove carbon and then adding soluble glass and aluminum sulfate as depressor, lauryl amine and oleic acid as flotation agent to enrich vanadium. The recovery of vanadium was 90.5% and the enrichment multiple of vanadium was only 1.4.
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Metals | Free Full-Text | Effective Extraction of Vanadium from
A new bauxite-type vanadium ore with a grade of 0.96% V2O5 was found in Hanzhong, China, having quartz, illite, and calcite as the main mineral constituents and vanadium that mainly occurs in the aluminosilicate lattice of illite by replacing Al3+ with V3+ in isomorphism form. In this study, a novel process of low-temperature sulfating …
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Vanadium recovery from oil fly ash by leaching, precipitation and
@article{osti_21023865, title = {Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes}, author = {Navarro, R and Guzman, J and Saucedo, I and Revilla, J and Guibal, E.}, abstractNote = {In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize …
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A literature review on leaching and recovery of vanadium
Jiang [ 27] investigated the leaching process of vanadium and chromium by sodium salt (Na 2 CO 3) roasting- (NH 4) 2 SO 4 leaching, the results showed that 94.6% vanadium and 96.5% chromium were leached out. Zhang [ 28] leached out vanadium from stone coal with 6 wt.% NaCl and 10 wt.% Na 2 SO 4 as roasting additive.
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Phase transformations of vanadium recovery from refractory …
In this study, a novel NaOH molten roasting and water leaching technology, an eco-friendly process with good selectivity and good availability, was investigated for vanadium recovery from refractory stone coal. In addition, the phase transformations during the vanadium recovery process were also studied. During
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Vanadium recovery from oil fly ash by leaching, precipitation and
The paper evaluates all important aspects related to V present in coal and its behaviour during coal combustion with particular attention paid to its potential extraction from ash and slag wastes. ... Process development for recovery of vanadium and nickel from an industrial solid waste by a leaching–solvent extraction technique. Journal of ...
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Vanadium recovery by electrodialysis using polymer inclusion …
In this work, a polymer inclusion membrane containing ctylmethylammonium chloride as carrier was successfully employed in electrodialysis for vanadium recovery from acidic sulfate solutions. The permeability coefficient of V (V) increased from 0.29 µm·s (without electric field) to 4.10 µm·s (with the 20 mA·cm current …
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Vanadium properties, toxicity, mineral sources and
Vanadium chemicals, known as the "vitamins of the modern industry," are major resources widely used in the petroleum, steel, batteries and catalyst industry. Vanadium is also essential in biological systems. Here we review vanadium properties, mineral sources and recovery methods such as blank, sodium and calcium roasting, …
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Vanadium Transitions during Roasting-Leaching Process of Vanadium
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 …
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