— 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 using …
WhatsApp: +86 18221755073
— Vanadium-bearing stone coal is an important vanadium resource in China; therefore, vanadium extraction from stone coal is given considerably more attention in this country [2]. 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 ...
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
process, vanadium-bearing muscovite is converted to K-Na-feldspar, accompanying the liberation ... coal, the vanadium recovery by the roasting-leaching procedure is around 65–75%, while for ...
WhatsApp: +86 18221755073
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 the
WhatsApp: +86 18221755073
— In this work, diboron xide and calcium fluoride are applied as composite additives to explore a process suitable for processing low-grade, high-vanadium, ultra-high-titanium vanadium–titanium magnetite. The metallized coal-based direct reduction–electromagnetic separation experiment was conducted. Results show that a …
WhatsApp: +86 18221755073
— WANG Li, SUN Wei, LIU Run-qing, GU Xiao-chuan. Flotation recovery of vanadium from low-grade stone coal [J]. Transactions of Nonferrous Metals Society of China, 2014, 24(4): 1145âˆ'1151. [12] LIU Chun, ZHANG Yi-min, BAO Shen-xu. Vanadium recovery from stone coal through roasting and flotation [J].
WhatsApp: +86 18221755073
— 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% …
WhatsApp: +86 18221755073
— In fact, vanadium has been recovered from industrial wastes such as stone coal, spent refinery catalysts, vanadium-bearing shale and slag fly ash through bioleaching process [23,24]. Chemolithotrophic …
WhatsApp: +86 18221755073
vanadium concentrate, and the recovery of vanadium was about 50% (Yuan 2006). If the stone coal is decar-burised first and then is treated by gravity separation, the recovery …
WhatsApp: +86 18221755073
— The critical role of vanadium in metallurgy and the increasing commercialization of vanadium redox flow batteries have contributed to a rise in market …
WhatsApp: +86 18221755073
— In bioleaching of vanadium-bearing shale, the maximum recovery of vanadium was 62% (Wei et al., 2018). Although 14.2% was leached out in Test 2, it was significantly higher than the Control (p < 0.01), suggesting the important role of microbial secondary metabolites in vanadium leaching process (Brisson et al., 2020; Steel and …
WhatsApp: +86 18221755073
— Recovery of vanadium and carbon from low-grade stone coal by flotation [J]. Transactions of Nonferrous Metals Society of China, 2015, 25(11): 3767âˆ'3773. [12] WANG Li, SUN Wei, LIU Run-qing, GU Xiao-chuan. Shuai YUAN, et al/Trans. Nonferrous Met. Soc. China 33(2023) 902âˆ'916 915 Flotation recovery of vanadium from low-grade …
WhatsApp: +86 18221755073
— Due to the poor vanadium recovery of mineral processing, the extraction of vanadium from stone coal is directly carried out by metallurgical processes. Salt process, acid process and alkali process three types of stone coal leaching including nine …
WhatsApp: +86 18221755073
— The extracted vanadium tailings were obtained from a steel company in China, and their chemical composition is displayed in Table 1, showing 41.32 % Fe 2 O 3, 8.99 % Na 2 O and 6.38 % Cr 2 O 3.The mineral composition and microstructure analysis revealed that hematite (Fe 2 O 3) was the dominant mineral, and the other minerals …
WhatsApp: +86 18221755073
— The motivation for this study was the need to avoid the interference of iron and to reduce the discharge of the spent water in the production of vanadium pentoxide. The work presents the process of vanadium recovery from stone coal acid leaching solution by coprecipitation, alkaline roasting and water leaching. 2. Experimental2.1.
WhatsApp: +86 18221755073
— 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, …
WhatsApp: +86 18221755073
— The recovery of vanadium from stone coal acid leaching solution by coprecipitation, alkaline roasting and water leaching was studied. ... This project for the treatment of wastes of Bayer process ...
WhatsApp: +86 18221755073
— A new process for vanadium recovery from stone coal by roasting–flotation was investigated based on the mineralogy. The process comprised four key steps: …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The oxidizing roasting process of vanadium containing stone coal was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy spectrum analysis (EDX), and the effects of roasting conditions on leaching rate of vanadium were studied. The results show that in the roasting process, the organic matter and pyrite are oxidized …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
— Bayer vanadium sludge (BVS), discharged during the Bayer alumina production, is a promising secondary resource for the supply of vanadium. The previous studies found that vanadium can be selectively extracted from BVS in the form of Ba3(VO4)2 using BaCO3 and then be leached in NH4HCO3 solution. However, a large …
WhatsApp: +86 18221755073
— 1. Introduction. Stone coal is carbonaceous shale which contains vanadium with a grade normally around 0.13%–1.2% in terms of V 2 O 5.In China, the gross reserve of vanadium in stone coal is 118 million tons, accounting for more than 87% of domestic reserve of vanadium (Bin, 2006, Qi, 1999).The methods on the recovery of vanadium …
WhatsApp: +86 18221755073
— The recovery of vanadium from low-grade stone coal and vanadium-containing solid wastes using microbial leaching, has become an increasingly popular technology. In this paper, Vanadium was obtained from stone coal using Aspergillus niger as the leaching strain, and the process of vanadium bioleaching was strengthened. …
WhatsApp: +86 18221755073
A process has been developed to recover gallium and vanadium from coal fly ash in which they exist at very low concentration in a mixture of high concentration of less desirable species. Aqueous solution containing 2.8 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 1.5 mol/l sulfuric acid. These metals were then concentrated by use of a …
WhatsApp: +86 18221755073
— To date, the basic recovery technology for vanadium has been sodium-roasting leaching technology, which was first proposed by Birck in 1912 and is widely used in the Chinese industries since the ...
WhatsApp: +86 18221755073
— A gradient oxidation roasting-acid leaching (GORA) process for stone coal was effective. ... To improve the recovery rate of vanadium, researchers have optimized the process parameters, added leaching aids, and heated or pressurized them [15]. However, they are associated with severe wastewater pollution and high costs.
WhatsApp: +86 18221755073
— Due to the poor vanadium recovery of mineral processing, the extraction of vanadium from stone coal is directly carried out by metallurgical processes. Salt process, acid process and alkali process three types of stone coal leaching including nine technologies are introduced. However, all of these nine leaching technologies have …
WhatsApp: +86 18221755073
— 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 the NaOH molten roasting …
WhatsApp: +86 18221755073