Co-recovery of manganese from low-grade pyrolusite and vanadium from stone coal using fluidized roasting coupling technology

Cai, Zhaoling; Feng, Yali; Li, Haoran; Du, Zhenmin; Li, Xinwei

doi:10.1016/j.hydromet.2012.10.002

Cited by 37 publications

(10 citation statements)

References 24 publications

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“…5,2007) [17]. The vanadium grade of the roasted sample was determined in accordance with Test Methods of Vanadium in Coal Standard (GB/T 19226-2003) [18].…”

Section: Measurement Methodsmentioning

confidence: 99%

“…However, most vanadium in stone coal exists as V(III) replacing Al(III) from dioctahedral structure as isomorphism in mica group minerals [3], which is generally recovered by roasting with sodium additive at a high temperature [4]. After that, the vanadium is liberated from crystal structure and converted to water or acid soluble vanadate [5], which is subsequently recovered by water leaching and/or acid leaching, ion purification, vanadium precipitation, and calcination [6][7][8]. 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].…”

Section: Introductionmentioning

confidence: 99%

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Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Zhao

Chen

et al. 2018

Minerals

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Abstract: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. Most liberated vanadium reacts with sodium salt to generate water-soluble sodium vanadate, some reacts with calcite in stone coal to form water-insoluble calcium vanadate, and other liberated vanadium exists as free vanadium oxide. However, for coarse muscovite grains, the reaction of muscovite converted to K-Na-feldspar only occurs at the outer margin of muscovite grains, and the vanadium in the interior of muscovite grains is not liberated. During water leaching, the sodium vanadate is leached out. The calcium vanadate and free vanadium oxide are dissolved out in the process of acid leaching, and the vanadium, presenting in muscovite grains surrounded by K-Na-feldspar, still remains in the acid leaching residue. Two suggestions, including optimization of grinding-classification process and adopting microwave roasting, were proposed for improving vanadium recovery according to the vanadium transition rules.

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“…5,2007) [17]. The vanadium grade of the roasted sample was determined in accordance with Test Methods of Vanadium in Coal Standard (GB/T 19226-2003) [18].…”

Section: Measurement Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Zhao

Chen

et al. 2018

Minerals

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“…Vanadium is widely used in the petrochemical industry, catalysts, and iron steel, due to the excellent physicochemical properties, and it is called “the vitamin of modern industry”. − It is mainly leached out from titanium magnetite and stone coal by hydrometallurgy technologies − and recovered by technologies like chemical precipitation, − ion exchange, , solvent extraction, ,− and adsorption. − Among them, chemical precipitation with ammonium salts is the most common method, and vanadium is precipitated in the form of (NH 4 ) 2 V 6 O 16 . The whole vanadium recovery efficiency can be up to 95%.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Kinetic Studies on Adsorption of Vanadium with Glutamic Acid

et al. 2021

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Many hydrometallurgy methods, including chemical precipitation, ion exchange, solvent extraction, and adsorption, have been used to recover vanadium from vanadium solution, but the final step of these methods involved precipitation with ammonium salts, high concentrations of which are harmful to the environment. The key point is to find a new compound to replace ammonium salts without reducing the vanadium precipitation efficiency. The adsorption process of vanadium with glutamic acid is investigated. The effects of experimental factors, including dosage of glutamic acid, reaction temperature, concentration of H 2 SO 4 , and reaction time, on the adsorption process are investigated. The results show that nearly 91.66% vanadium is adsorbed under the following reaction conditions: reaction temperature of 90 °C, H 2 SO 4 concentration of 20 g/L, glutamic acid dosage at n (glu)/ n (V) = 3.0:1, and reaction time of 60 min. The response surface methodology is applied to optimize the reaction conditions. The analysis results indicate that the reaction temperature has the greatest effect on the adsorption efficiency of vanadium and the influence of experimental factors follows the order: reaction temperature > dosage of glutamic acid to vanadium > reaction time > concentration of H 2 SO 4 . The pseudo-second-order model is selected to describe well the adsorption kinetic behavior, and the thermodynamic analysis results indicate that the adsorption process of vanadium is unspontaneous and exothermic. The results will be useful for further applications of glutamic acid, and they provide a bright future for vanadium recovery.

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“…When the ores mainly contain MnCO 3 , manganese can be obtained directly through acid leaching. When the ores contain MnO 2 , the ores can be treated through reduction roasting followed by acid leaching [4][5][6][7] or directly through reductive leaching in dilute acid medium with different reducing agents, which includes waste tea [8], corncob [9], cornstalk [10], molasses [11], sawdust [12], glucose [13], oxalic acid [14], H 2 O 2 [15,16], SO 2 [17] and sphalerite [18]. Bioleaching technology has also been used to liberate manganese from ores [19].…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Process and Kinetics of Leaching Manganese from Semi-Oxidized Manganese Ores with Sucrose

Wang

Sheng-long

et al. 2017

Minerals

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Abstract:The extraction of manganese from a semi-oxidized manganese ore was investigated with sucrose as the reducing agent in dilute sulfuric acid medium. The kinetics of leaching manganese from the complex ore containing MnCO 3 and MnO 2 was also investigated. The effects of sucrose and sulfuric acid concentrations, leaching temperature and reaction time on the total Mn (TMn), MnO 2 and MnCO 3 leaching were investigated. Results showed that MnCO 3 could more easily react with hydrogen ions than MnO 2 in ores, and MnO 2 decomposition could be advantageous for MnCO 3 leaching. The leaching efficiencies of 91.8% for total Mn, 91.4% for MnO 2 and 96.9% for MnCO 3 were obtained under the following optimized conditions: 0.035 mol/L sucrose concentration, 5 mol/L sulfuric acid concentration, 60 min of reaction time and 363.2 K of leaching temperature. In addition, it was found that the leaching process of semi-oxidized manganese ore follows the shrinking core model and the leaching rate was controlled by chemical reaction and diffusion. The apparent activation energy of the total manganese, MnO 2 , and MnCO 3 leaching were 40.83, 40.59, and 53.33 kJ·mol −1 , respectively.

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Co-recovery of manganese from low-grade pyrolusite and vanadium from stone coal using fluidized roasting coupling technology

Cited by 37 publications

References 24 publications

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal

Thermodynamic and Kinetic Studies on Adsorption of Vanadium with Glutamic Acid

Hydrometallurgical Process and Kinetics of Leaching Manganese from Semi-Oxidized Manganese Ores with Sucrose

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