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  • (PDF) Extraction of Vanadium from Stone Coal by

     · 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

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  • The Output Analysis For Vanadium Extraction From Stone

    The Output Analysis For Vanadium Extraction From Stone Coal In April 2021. ferroalloynet 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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  • 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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  • PRE-CONCENTRATION OF VANADIUM-BEARING MICA

     · grade of stone coal is improved from 0.7 to 0.8 the cost of producing 1 t of V 2 O 5 will increase profits by 29 (Ning et al. 2010 Zhao et al. 2013). Hence the vanadium pre-concentration of stone coal may improve vanadium recovery and reduce production costs. Furthermore the vanadium

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  • Extraction of vanadium from stone coal by modified salt

     · In order to reduce the pollution of Cl 2 and HCl released during extracting vanadium from stone coal by sodium chloride roasting a modified salt-roasting process was proposed by adding calcined lime in roasting process followed by H 2 SO 4 leaching. The effects of parameters including roasting temperature roasting time addition mass ratio of NaCl calcined lime upon leaching rate of

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  • A Novel Technology of Vanadium Extraction from Stone

    The total recovery of vanadium reached 76.3 which was higher than the current applied technology. The novel technology was environmentally-friendly and could extract vanadium from the stone coal in which the content of V 2 O 5 was less than 0.8 .

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  • An environmentally-friendly technology of vanadium

    A novel technology characterized by higher recovery of vanadium and which was environmentally-friendly was developed to recover vanadium from stone coal. Vanadium in stone coal could be leached by

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  • An environmentally-friendly technology of vanadium

    A novel technology characterized by higher recovery of vanadium and which was environmentally-friendly was developed to recover vanadium from stone coal. Vanadium in stone coal could be leached by

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  • Mechanism of Enhancing Extraction of Vanadium from

    In this paper the extraction of vanadium from stone coal by roasting with MgO and leaching with sulfuric acid has been investigated and the mechanism analysis of stone coal roasting with MgO was studied. The results indicated that under the conditions that the mass fraction of the particles with grain size of 0–0.074 mm in raw ore was 75 the roasting temperature was 500 °C the roasting

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  • Bioleaching of vanadium from barren stone coal and its

    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

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  • Extraction of vanadium from stone coal by roasting in a

     · In order to improve leaching efficiency of vanadium pentoxide (V 2 O 5) from stone coal and to reduce its connected environmental pollution this article investigated the oxidizing roasting of stone coal in a laboratory fluidized bed reactor to optimize the roasting method and conditions.The examined parameters included reaction temperature reaction time and amount and mixing method of additive.

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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

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  • The process of vanadium migration and silicon extraction

    Abstract. It is difficult to utilize stone coal with a vanadium grade of below 0.7 . With the aim of effectively utilizing the silicon and vanadium in stone coal the vanadium concentration and silicon extraction processes by alkaline leaching under reducing conditions were investigated.

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  • Study on Extraction of Vanadium from High Acid Leach

    A new extractant HBL 101 was used to directly extract vanadium from high acid leach solution of stone coal. The effects of acidity and Eh of feed time phase ratio and temperature on the extraction of vanadium were investigated. The extraction distribution isotherm was also obtained. The results showed that the extraction of vanadium reached 98 in single stage with A/O ratio of 1 1 at 35 45

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  • Production Of Vanadium Extraction From Stone Coal In

    ferroalloynet The output of vanadium extraction from stone coal increased and then decreased in the first three quarters of 2019. From January to March a few of the enterprises that actively resumed production affected by last year s high vanadium price began to produce.

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  • Extraction of vanadium from stone coal by roasting in a

     · Extraction of vanadium from stone coal by roasting in a fluidized bed reactor Xi Zenga Fang Wangb Huifeng Zhanga c Lijie Cuic Jian Yua ⇑ Guangwen Xua ⇑ a State Key Laboratory of Multi-Phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China bSchool of Chemical and Environmental Engineering China University of Mining and

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  • Gravity Using Fine Mineral Spiral

     · In China stone coal is a vanadium resource with huge reserves. The gross reserve of vanadium in terms of V2O5 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

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  • Separation and recovery of vanadium from a sulfuric-acid

    Vanadium separation Stone coal Trialkylamine Solvent extraction abstract Trialkylamine-N235 diluted with sulfonated kerosene containing tri-butyl phosphate was used to sep-arate vanadium and impurities as Fe Al Mg K Ca P and Si from a leaching solution generated by the sulfuric-acid leaching of vanadium-containing stone coal.

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  • Bioleaching of vanadium from barren stone coal and its

     · 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 Fe2 concentration solid load and inoculum quantity were examined. The results revealed that 48.92wt of the vanadium was extracted through

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  • Oxidation Mechanism of Vanadium Extraction in Stone

     · CHEN Tie-Jun QIU Guan-Zhou ZHU De-Qing. Oxidation Mechanism of Vanadium Extraction in Stone Coal Roasting with Cyclic Oxidation J . Metal Mine 2008 38(06) 62-66.

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  • Oxidation Mechanism of Vanadium Extraction in Stone Coal

     · CHEN Tie-Jun QIU Guan-Zhou ZHU De-Qing. Oxidation Mechanism of Vanadium Extraction in Stone Coal Roasting with Cyclic Oxidation J . Metal Mine 2008 38(06) 62-66.

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  • Improved extraction of vanadium from a Chinese

     · 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.

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  • A Novel Technology of Vanadium Extraction from Stone Coal

    The total recovery of vanadium reached 76.3 which was higher than the current applied technology. The novel technology was environmentally-friendly and could extract vanadium from the stone coal in which the content of V 2 O 5 was less than 0.8 .

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  • Separation and recovery of vanadium from a sulfuric

    Vanadium separation Stone coal Trialkylamine Solvent extraction abstract Trialkylamine-N235 diluted with sulfonated kerosene containing tri-butyl phosphate was used to sep-arate vanadium and impurities as Fe Al Mg K Ca P and Si from a leaching solution generated by the sulfuric-acid leaching of vanadium-containing stone coal.

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  • The technology of extracting vanadium from stone coal in

    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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  • An environmentally-friendly technology of vanadium

     · A novel technology characterized by higher recovery of vanadium and which was environmentally-friendly was developed to recover vanadium from stone coal. Vanadium in stone coal could be leached by NaOH solution after roasting stone coal at 850 °C for 3 h. H 2 SO 4 Mg (NO 3) 2 and ammonia were employed respectively in two steps to remove the

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  • Separation and recovery of vanadium from a sulfuric

    Vanadium separation Stone coal Trialkylamine Solvent extraction abstract Trialkylamine-N235 diluted with sulfonated kerosene containing tri-butyl phosphate was used to sep-arate vanadium and impurities as Fe Al Mg K Ca P and Si from a leaching solution generated by the sulfuric-acid leaching of vanadium-containing stone coal.

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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

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  • Synergistic solvent extraction of vanadium from leaching

    Synergistic solvent extraction of vanadium from leaching solution of stone coal using D2EHPA and PC88A Qihua Shia c Yimin Zhanga b c ⇑ Jing Huanga b c Tao Liua b c Hong Liua c Luyao Wanga a

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  • Production Of Vanadium Extraction From Stone Coal In The

    ferroalloynet The output of vanadium extraction from stone coal increased and then decreased in the first three quarters of 2019. From January to March a few of the enterprises that actively resumed production affected by last year s high vanadium price began to produce.

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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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  • Extraction of vanadium from stone coal by modified salt

     · Extraction of vanadium from stone coal by modified salt-roasting process Extraction of vanadium from stone coal by modified salt-roasting process Wang Ming-yu Wang Xue-wen Shen Ji-feng Wu Ri-na 00 00 00 In order to reduce the pollution of Cl2 and HCl released during extracting vanadium from stone coal by sodium chloride roasting a modified salt-roasting process

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  • Extraction of vanadium from stone coal by modified salt

    The extraction technology of vanadium from stone coal by means of no-salt-roasting and dilute acid solution leaching treatment has the advantages of low pollution low investment as well as high

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  • An environmentally-friendly technology of vanadium

     · 3. Results and discussion3.1.. RoastingIn stone coal vanadium mainly fettered in crystal structure of roscoelite in the form of V(III) and V(III) could not be leached by NaOH until it is turned into oxide (V 2 O 5) ().Therefore the purpose of roasting was to make V(III) in stone coal turn into V 2 O 5 this process roasting temperature was very important.

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  • Improved extraction of vanadium from a Chinese vanadium

     · 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.

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  • Extraction of vanadium from the leach solution of stone

     · 1.. IntroductionThere are hundreds of plants producing vanadium from stone coal in China. Most of them are on small scales and adopt the classic process which includes chloridizing roasting water leaching deposition alkali melting and thermal decomposition ().This process is costly and complicated with low recovery of vanadium ().Moreover it causes serious environmental pollution by

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  • The process of vanadium migration and silicon extraction

    It is difficult to utilize stone coal with a vanadium grade of below 0.7 . With the aim of effectively utilizing the silicon and vanadium in stone coal the vanadium concentration and silicon extraction processes by alkaline leaching under reducing conditions were investigated. The effect of NaOH mass fraction temperature and the amount of hydrazine hydrate on the leaching process was researched.

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  • Source separation of V and Fe by two-stage selective

    A method of two stage selective leaching for separation of V and Fe during V extraction from stone coal was developed. In the primary procedure stone coal was roasted in an inert atmosphere at 900 °C for 1 h and then the roasted product was leached for Fe removal in 7 (vol ) H 2 SO 4 at 30 °C for 30 min when the liquid-to-solid ratio (L/S) was 3 1 mL g −1.

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  • Extraction of vanadium from the leach solution of stone

     · 1.. IntroductionThere are hundreds of plants producing vanadium from stone coal in China. Most of them are on small scales and adopt the classic process which includes chloridizing roasting water leaching deposition alkali melting and thermal decomposition ().This process is costly and complicated with low recovery of vanadium ().Moreover it causes serious environmental pollution by

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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 can be up to

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