An environmentally-friendly technology of vanadium ...
Vanadium was leached from roasted stone coal by NaOH solution, and the effect of leaching temperature, leaching time, addition of NaOH liquid to solid ratio, the grinding fineness of stone coal ...
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Effects of the mineral phase and valence of vanadium on ...
The influence of roasting on the leaching rate and valence of vanadium was evaluated during vanadium extraction from stone coal. Vanadium in stone coal is hard to be leached and the leaching rate is less than 10% when the raw ore is leached by 4 mol/L H 2 SO 4 at 90°C for 2 h. After the sample is roasted at 900°C for 2 h, the leaching rate of vanadium reaches the maximum, and more than 70% ...
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Effect of physical and chemical properties of vanadium ...
Effect of physical and chemical properties of vanadium slag from stone coal on the form of vanadium. Yingbo Dong 1,2, Yiming Zhao 1,2, Hai Lin 1,2 & Chenjing Liu 1,2 Environmental Science and Pollution Research volume 26, pages 33004–33013 (2019)Cite this article
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Bioleaching and biosorption behavior of vanadium-bearing ...
The recovery of vanadium (V) from stone coal by bioleaching is a promising method. The bioleaching experiments and the biosorption experiments were carried out, aiming to explore the adsorption characteristics of Bacillus mucilaginosus (B. mucilaginosus) on the surface of vanadium-bearing stone coal, and the related mechanisms have been investigated.
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Minerals | Free Full-Text | Vanadium Transitions during ...
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.
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The technology of extracting vanadium from stone coal in ...
Stone coal is an important vanadium-bearing resource in China and the gross reserves of vanadium in stone coal accounts for more than 87% of the domestic reserves of vanadium. Hence, much attention has been paid to research on extracting vanadium from stone coal. The traditional high salt roasting-water leaching (HSRWL) technique is the ...
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CN1254023A - Leaching-out method for extracting vanadium ...
The present invention discloses a leaching process for extracting vanadium from calciners of ore containing vanadium and its application in bone coal blank calcination-direct leaching vanadium-extracting process. It is mainly characterized by that the broken bone coal is calcined in vertical kiln, under the condition of 800-1100 deg.C oxidated and decarbonized, then the calciners are ...
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The technology of extracting vanadium from stone coal in ...
Stone coal is widely distributed in southern provinces and autonomous region of China and Shanxi province. It is reported that the gross reserves of stone coal in these districts are estimated at 61.88 billion tons ().Vanadium is commonly founded in stone coal and the gross reserves of vanadium is 118 million tons in the terms of V 2 O 5 (), accounting for more than 87% of the domestic ...
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A new process of extracting vanadium from stone coal ...
A new process of extracting vanadium from the stone coal vanadium ore in Fangshankou, Dunhuang area of Gansu Province, China was introduced. Various leaching experiments were carried out, and the results show that the vanadium ore in Fangshankou is difficult to process due to its high consumption of acid and the high leaching rate of impurities. However, the leaching rate …
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Experiment and mechanism of vanadium extraction from stone ...
The results show that the vanadium leaching ratio of roasted stone coal through two-stage counter-current leaching can reach 65.1% at the mass ratio of H2SO4 to stone coal of 20%, leaching ...
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Study on the synergistic extraction of vanadium by ...
An environmentally-friendly technology of vanadium extraction from stone coal. Miner. Eng., 20 (2007), pp. 1184-1186. Article Download PDF View Record in Scopus Google Scholar. Y.A. El-Nadi, N.S. Awwad, A.A. Nayl. A comparative study of vanadium extraction by Aliquat-336 from acidic and alkaline media with application to spent catalyst.
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Extraction of Vanadium from Stone Coal by Microwave ...
The extraction of vanadium from stone coal was investigated by microwave-assisted sulfation roasting followed by water leaching. The results showed that this process is an effective method for the extraction of vanadium from stone coal. Microwave-assisted sulfation roasting promotes the reaction of sulfuric acid with vanadium oxides and decreases roasting time. Under …
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Isolation of vanadium-resistance endophytic bacterium ...
Isolation of vanadium-resistance endophytic bacterium PRE01 from Pteris vittata in stone coal smelting district and characterization for potential use in phytoremediation J Hazard Mater . 2018 Jan 5;341:1-9. doi: 10.1016/j.jhazmat.2017.07.036.
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Roast Experiment Research of Vanadium Stone Coal | MRS ...
Experimental results indicate that, for the vanadium stone coal from Hubei Province, at the condition of additive dosage is 6%, the ideal target of vanadium lixiviate efficiency 82.3% can be acquired in the optimum condition of roasting temperature at 850 oC, roasting …
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CN101275187A - Process for extracting vanadium by stone ...
The invention discloses a process for using stone-like coal wet method to extract vanadium, comprising the steps of: crushing and ball-milling the stone-like coal to sieve, mix (adding additive), pickle, exchange the ions, depositing the vanadium and calcine to produce the product of vanadic oxide, the comprehensive recovery rate is larger than 80%; compared with current process, the leaching ...
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Improved extraction of vanadium from a Chinese vanadium ...
Vanadium is a rare metal mainly used in the steel industry. 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 …
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Vanadium emission during roasting of vanadium-bearing ...
Abstract The characteristics of the vanadium-bearing stone coal during chlorination roasting at different temperature were investigated. Chlorination roasting could promote the breakage of the structure of the main vanadium-bearing minerals, such as muscovite and illite, in the stone coal and more than 90% of the vanadium was lost after the sample was roasted in chlorine at 1000 °C for 1 h.
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Pre-Concentration of Vanadium from Stone Coal by …
In China, stone coal is a vanadium resource with huge reserves. The gross reserve of vanadium in terms of V 2 O 5 in stone coal is 118 million tons, which accounts for more than 87% of the domestic reserve of vanadium [1,2].Therefore, many techniques of vanadium extraction from stone coal have been researched and developed by various researchers [3,4].
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Extracting Vanadium from Stone Coal by a Cyclic Alkaline ...
12%Vanadium, as a strategic metal, has been attractive for a variety of applications, including iron industry, catalysis, flow batteries.[1,2,3] It was reported that the reserve of vanadium (V 2 O 5 as the unit) in stone coal is more than 117.97 million tons in China.[] With such large reserves, extracting vanadium from stone coal has obtained great consideration in recent decades.
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Effect of calcium on the vanadium extraction from high ...
The high calcium type stone coal from Hubei province was leached by water and dilute acid separately after being roasted with different dosage of NaCl. The water leaching rate of vanadium (WLRV) was low and only 26.8% of vanadium can be leached by water when 4% NaCl was added, but the acid leaching rate of vanadium (ALRV) was relatively high. Calcium in the high calcium type …
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The Output Analysis For Vanadium Extraction From Stone ...
The Output Analysis For Vanadium Extraction From Stone Coal In April 2021. : According to FerroAlloyNet, there are 6 companies on vanadium extraction from stone coal under normal production in April, with total output of 575 tons, down by 24.8% M-O-M.
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(PDF) A review of processing technologies for vanadium ...
The content of vanadium in raw stone coal is 0.65%. V. 2. O. 5. . 78.3% of vanadium was extracted from the stone. coal by sulphation roasting at 140 °C for 3 h with 20 wt. % sulfuric acid ...
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Preparation of High Purity V2O5 from a Typical Low …
vanadium from a low-grade stone coal with the characteristics of shorter process and lower acid consumption, as well as higher purity of product was developed. V …
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PRE-CONCENTRATION OF VANADIUM-BEARING MICA FROM …
utilization of stone coal resources. Keywords: roasting, flotation, vanadium bearing mica, stone coal Introduction Vanadium is an important material used mostly in steel industry. Approximately 80% of world's vanadium is used in steel alloys, and the other 20% in the chemical industry (Moskalyk and Alfantazi, 2003). The gross reserve of V 2 O 5
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A new process of extracting vanadium from stone coal ...
12%A new process of extracting vanadium from the stone coal vanadium ore in Fangshankou, Dunhuang area of Gansu Province, China was introduced. Various leaching experiments were carried out, and the results show that the vanadium ore in Fangshankou is difficult to process due to its high consumption of acid and the high leaching rate of impurities. However, the …
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Blank roasting and bioleaching of stone coal for vanadium ...
The recovery and utilization of vanadium from stone coal is of great significance because it is an important metal. In the present study, a cleaner metal extraction method to recover vanadium from low-grade stone coal using a novel strain of Bacillus mucilaginosus (BM) and an enhanced bioleaching procedure was explored.
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Calcified roasting-acid leaching process of vanadium from ...
The low-grade vanadium-containing stone coal used in this experiment was collected from Wuxi Country, Chongqing City, China. The experiment focused on the vanadium recovery from roasted residue through optimizing the process conditions of an effective and environmentally-friendly technology, named calcified roasting-sulfuric acid leaching technology. By single-factor experiments …
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Mechanism of Enhancing Extraction of Vanadium from Stone ...
Stone coal is a particular vanadium ore resource in China, and its gross reserves of vanadium account for more than 87% of the domestic reserves of vanadium [3,4,5]. Therefore, extracting vanadium from stone coal is an important way to obtain vanadium pentoxide.
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Maggy Huang - Sales and Marketing Manager - Chongyang ...
Chongyang County Ocean Vanadium Industry Co., Ltd, hereinafter COVIC, specializes in producing and trading vanadium products.It is the biggest private vanadium manufacturer that has the qualification of import and export trade in Chongyang county. As early as 1976, the development of vanadium extraction from stone coal had begun in its own plants.
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Effect of Calcium on the Vanadium Extraction from High ...
Vanadium, as one of the important rare elements, is used mainly to produce certain alloys. Stone coal is an important vanadium-bearing resource in China and the gross reserves of vanadium in stone ...
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Effect of physical and chemical properties of vanadium ...
Effect of physical and chemical properties of vanadium slag from stone coal on the form of vanadium Environ Sci Pollut Res Int. 2019 Nov;26(32):33004-33013. doi: 10.1007/s11356-019-06381-7. Epub 2019 Sep 11. Authors Yingbo Dong 1 ...
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Analysis on the Output from Stone Coal in December ...
Analysis on the Output from Stone Coal in December. : According to incomplete statistics, in December 2019, there were 9 vanadium extraction enterprises in the production of stone coal, and another 17 enterprises were shut down. In December, vanadium prices remained stagnant. The production of ammonium metavanadate is still at a low level affected by price, …
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Selective Leaching of Vanadium from Roasted Stone Coal by ...
A novel staged leaching process has been reported in this paper to selectively extract vanadium from roasted stone coal and the mechanisms have been clarified. Results showed that the leaching efficiency of V, Al, P and Fe was 80.46%, 12.24%, 0.67% and 3.12%, respectively, under the optimum dilute sulfuric acid dephosphorization (DSAD)-two-stage pressure acid leaching (PAL) conditions.
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