Email Adddress: [email protected]

vanadium recovery process and coal

vanadium recovery process and coal

Vanadium recovery from stone coal through roasting

2017-1-1  Abstract. A new process for vanadium recovery from stone coal by roasting–flotation was investigated based on the mineralogy. The process comprised four key steps: decarburization, preferential grinding, desliming and flotation. In the decarburization stage, roasting at 550 °C effectively avoided the negative effect of the carbonaceous materials in ...

Get Price

vanadium recovery process and coal - charlyshop.ch

VANADIUM RECOVERY PROCESS. Apr 18 1972 0183 32 A process for recovery of vanadium values from a calcine of a vanadium-bearing calcium-rich matrix which

Get Price

Vanadium recovery from stone coal through roasting and ...

2017-1-19  Abstract: A new process for vanadium recovery from stone coal by roasting−flotation was investigated based on the mineralogy. The process comprised four key steps: decarburization, preferential grinding, desliming and flotation. In the decarburization stage,

Get Price

Phase transformations of vanadium recovery from

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

Get Price

Flotation recovery of vanadium from low-grade stone

2014-4-1  The final vanadium concentrate with V 2 O 5 grade of 1.88% and recovery rate of 76.58% is obtained by desliming–flotation process and 72.51% of the raw ore is rejected as tailings. The pre-concentration of vanadium from low-grade stone coal can increase V 2 O 5 grade and decrease the content of acid consuming minerals, which would enable economical utilization of metallurgical

Get Price

The technology of extracting vanadium from stone

2011-9-1  The principle of recovering vanadium from stone coal is to oxidize V (III) to acid-soluble V (IV) compounds and/or water-soluble V (V) compounds, and then to dissolve it by acid leaching

Get Price

Flotation recovery of vanadium from low-grade stone coal

2014-5-6  with V2O5 grade of 1.88% and recovery rate of 76.58% is obtained by desliming–flotation process and 72.51% of the raw ore is rejected as tailings. The pre-concentration of vanadium from low-grade stone coal can increase V2O5 grade and decrease the content

Get Price

A new process for the recovery of iron, vanadium, and ...

2014-7-3  A new process for the recovery of iron, vanadium, and titanium Coal is used as reductant. The chemical analysis of the coal is listed in Table I, which shows that the coal is high in fixed carbon (FC), and low in ash (Aad) and total sulphur (Std). AApparatus and procedure Figure 3 shows the schematic diagram of the experiment

Get Price

Vanadium(V) removal and recovery by adsorption

2021-4-5  The vanadium concentration amounts up to 260 mg/g in crude fuel and up to 56 mg/kg of coal . Various amounts of vanadium remain in solid residue, fly ash and boiler gauge such as vanadium pentoxide after combustion. Vanadium is also used as an energy storage material in power grid systems . Vanadium is found in natural waters in many different forms, V(IV) and V(V), which have varying

Get Price

Separation and recovery of vanadium from a sulfuric

2016-5-30  At present, acid leaching with H 2 SO 4 has been widely adopted for vanadium leaching from stone coal because of the advantages of high vanadium recovery and low pollution , . So as to improve vanadium leaching rate, high H 2 SO 4 concentration is commonly used in the acid leaching process. Therefore, numerous impurities, such as Fe, Al, and Mg ions, are also leached along with vanadium from stone coal, resulting in a complex vanadium-bearing leaching

Get Price

Phase transformations of vanadium recovery from

Phase transformations of vanadium recovery from refractory stone coal by novel NaOH molten roasting and water leaching technology Zhenlei Cai *abc and Yimin Zhang*abcd In this study, a novel NaOH molten roasting and water leaching technology, an eco-friendly process with

Get Price

Flotation recovery of vanadium from low-grade stone coal

2014-5-6  extracting process is an effective method to raise the grade of metal and further reduce production cost. ZHAO et al [12] used gravity separation to pre-concentrate vanadium from stone coal. Even though only 9.7% vanadium was lost by this method, the yield of tailing was low and only accounted for 28.9% of the feed ore.

Get Price

Mechanisms of Vanadium Recovery from Stone Coal

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal

Get Price

Phase transformations of vanadium recovery from

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

Get Price

Vanadium Transitions during Roasting-Leaching Process

2018-2-12  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 extraction, and vanadium precipitation, the vanadium recoveries are more than 97% [9,10]. Therefore, the total vanadium recovery depends on the vanadium

Get Price

A new process for the recovery of iron, vanadium, and ...

2014-7-3  A new process for the recovery of iron, vanadium, and titanium Coal is used as reductant. The chemical analysis of the coal is listed in Table I, which shows that the coal is high in fixed carbon (FC), and low in ash (Aad) and total sulphur (Std). AApparatus and procedure Figure 3 shows the schematic diagram of the experiment

Get Price

Mechanisms of Vanadium Recovery from Stone Coal

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal

Get Price

Improved extraction of vanadium from a Chinese

2009-10-20  Vanadium‐bearing stone coal is an important source of vanadium in China. The common process used to extract vanadium from the stone coals is roast‐leach, which has the disadvantages of low vanadium recovery and significant pollution. This work presents a modified roast‐leach process in order to improve the efficiency of the extraction.

Get Price

Vanadium Transitions during Roasting-Leaching

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.

Get Price

Recovery of metals and other beneficial products

2016-8-19  Increasing production and disposal of coal fly ash (CFA) is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery

Get Price

Phase transformations of vanadium recovery from

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

Get Price

Mechanisms of Vanadium Recovery from Stone Coal

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal

Get Price

Vanadium Recovery from Oil Fly Ash by Carbon Removal

2020-10-19  product could be obtained for the further vanadium recovery process. Therefore, 10 g of the oil fly ash C for 4 h. After the carbon removal process, the vanadium concentration in the sample was increased from Fig. 1. Proposed flow sheet of vanadium extraction. Vanadium Recovery from Oil Fly Ash by Carbon Removal and Roast-Leach Process 169

Get Price

A new process for the recovery of iron, vanadium, and ...

2014-7-3  A new process for the recovery of iron, vanadium, and titanium Coal is used as reductant. The chemical analysis of the coal is listed in Table I, which shows that the coal is high in fixed carbon (FC), and low in ash (Aad) and total sulphur (Std). AApparatus and procedure Figure 3 shows the schematic diagram of the experiment

Get Price

Vanadium Transitions during Roasting-Leaching Process

2018-2-12  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 extraction, and vanadium precipitation, the vanadium recoveries are more than 97% [9,10]. Therefore, the total vanadium recovery depends on the vanadium

Get Price

Vanadium Recovery from Oil Fly Ash by Carbon

2017-11-13  This research mainly focuses on the recovery of vanadium from oil fly ash by carbon removal and the roast-leach process. The oil fly ash contained about 85% unburned carbon and 2.2% vanadium by weight. A vanadium-enriched product was obtained after carbon removal, and the vanadium content of this product was 19% by weight. Next, the vanadium-enriched product was roasted with

Get Price

Step-Adsorption of Vanadium (V) and Chromium (VI)

2020-4-14  To date, the main raw materials for vanadium recovery were converter vanadium slag 7,8,9, stone coal 10,11,12, steel slag 13 and waste catalyst materials 14,15. A considerable number of ...

Get Price

Improved extraction of vanadium from a Chinese

2009-10-20  Vanadium‐bearing stone coal is an important source of vanadium in China. The common process used to extract vanadium from the stone coals is roast‐leach, which has the disadvantages of low vanadium recovery and significant pollution. This work presents a modified roast‐leach process in order to improve the efficiency of the extraction.

Get Price

Bioleaching of vanadium from barren stone coal and

This study determined the optimal conditions required to obtain maximum vanadium extraction and examined the transition of mineral phases and vanadium speciation during the bioleaching process. Parameters including the initial pH value, initial Fe 2+ concentration, solid load, and inoculum quantity were examined. The results revealed that 48.92wt% of the vanadium was extracted through ...

Get Price

Recovery of metals and other beneficial products

2016-8-19  Increasing production and disposal of coal fly ash (CFA) is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery

Get Price

Phase transformations of vanadium recovery from

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

Get Price

Mechanisms of Vanadium Recovery from Stone Coal

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to realize and improve the vanadium recovery from stone coal

Get Price

Vanadium Transitions during Roasting-Leaching Process

2018-2-12  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 extraction, and vanadium precipitation, the vanadium recoveries are more than 97% [9,10]. Therefore, the total vanadium recovery depends on the vanadium

Get Price

Preparation of High Purity V2O5 from a Typical Low

2019-12-8  The total vanadium recovery in the whole process is above 88%. This process has advantages of short operation time, high vanadium ... reserves of vanadium. Stone coal is a kind of carbonaceous shale which looks like coal but mostly consists of quartz and with a low calorific value [2]. Typically, vanadium in stone coal exists in the

Get Price

Vanadium Recovery from Oil Fly Ash by Carbon Removal

2020-10-19  product could be obtained for the further vanadium recovery process. Therefore, 10 g of the oil fly ash C for 4 h. After the carbon removal process, the vanadium concentration in the sample was increased from Fig. 1. Proposed flow sheet of vanadium extraction. Vanadium Recovery from Oil Fly Ash by Carbon Removal and Roast-Leach Process 169

Get Price

Improved extraction of vanadium from a Chinese

2009-10-20  Vanadium‐bearing stone coal is an important source of vanadium in China. The common process used to extract vanadium from the stone coals is roast‐leach, which has the disadvantages of low vanadium recovery and significant pollution. This work presents a modified roast‐leach process in order to improve the efficiency of the extraction.

Get Price

Vanadium Recovery from Oil Fly Ash by Carbon

2017-11-13  This research mainly focuses on the recovery of vanadium from oil fly ash by carbon removal and the roast-leach process. The oil fly ash contained about 85% unburned carbon and 2.2% vanadium by weight. A vanadium-enriched product was obtained after carbon removal, and the vanadium content of this product was 19% by weight. Next, the vanadium-enriched product was roasted with

Get Price

Bioleaching of vanadium from barren stone coal and

This study determined the optimal conditions required to obtain maximum vanadium extraction and examined the transition of mineral phases and vanadium speciation during the bioleaching process. Parameters including the initial pH value, initial Fe 2+ concentration, solid load, and inoculum quantity were examined. The results revealed that 48.92wt% of the vanadium was extracted through ...

Get Price

Selective Separation and Extraction of Vanadium(IV)

2019-12-12  Novel technology for selective separation and extraction of vanadium(IV) and manganese(II) from co-leaching solution of roasted stone coal and pyrolusite via solvent extraction was used to study the extraction of vanadium(IV) and manganese(II), and many technical conditions have also been optimized. Countercurrent experiments were conducted to verify the results of the experiments.

Get Price

Step-Adsorption of Vanadium (V) and Chromium (VI)

2020-4-14  To date, the main raw materials for vanadium recovery were converter vanadium slag 7,8,9, stone coal 10,11,12, steel slag 13 and waste catalyst materials 14,15. A considerable number of ...

Get Price