Journal ArticleDOI
Effective Extraction of Vanadium and Chromium from High Chromium Content Vanadium Slag by Sodium Roasting and Water Leaching
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In this article, the extraction of vanadium and chromium from high chromium content vanadium slag by salt roasting and water leaching process has been investigated, which uses mixed sodium salts (Na2CO3 and NaOH) as additive agent in roasting process.Abstract:
The extraction of vanadium and chromium from high chromium content vanadium slag by salt roasting and water leaching process has been investigated, which uses mixed sodium salts (Na2CO3 and NaOH) as additive agent in roasting process. The mineralogical morphology was prospected by TG-DSC, XRD, SEM and EDS. The oxidation of slag and transversion of V/Cr-containing phase and sodium salts have been discussed. It has been demonstrated that the presence of NaOH contributes to decompose spinel and olivine phases, which is beneficial to reduce the roasting temperature and elevate V, Cr leaching ratio. The roasting parameters have been studied as a function of roasting temperature, roasting time and ratio of alkali, in which the roasting temperature is the most effective factor on the leaching rate of vanadium and chromium. Under the optimum condition, the leaching rates of V and Cr reached 95.8% and 97.6%, respectively.read more
Citations
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Journal ArticleDOI
A review on the metallurgical recycling of vanadium from slags: towards a sustainable vanadium production
TL;DR: A comprehensive review on the metallurgical treatments of vanadium bearing slags from various sources is given in this article, where the authors highlight the separation vanadium from silica, phosphorus and chromium as the major interfering elements/metal in the leach solutions.
Journal ArticleDOI
Efficient extraction and separation of vanadium and chromium in high chromium vanadium slag by sodium salt roasting-(NH4)2SO4 leaching
TL;DR: In this article, a novel process based on sodium salt roasting (NH4)2SO4 leaching was proposed to extract vanadium and chromium in high chromium vanadium slag (HCVS).
Journal ArticleDOI
Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slag
TL;DR: In this article, the effects of the purity of CaO, molar ratio between CaO and V2O5, roasting temperature, holding time, and the heating rate used in the oxidation-calcification processes were investigated.
Journal ArticleDOI
A cleaner and efficient process for extraction of vanadium from high chromium vanadium slag: Leaching in (NH4)2SO4-H2SO4 synergistic system and NH4+ recycle
TL;DR: In this article, a (NH4 2SO4-H2SO4 synergistic system was introduced into the leaching process for extracting vanadium efficiently after calcification roasting with high chromium vanadium slag (HCVS), and then V2O5 was prepared after precipitation and roasting.
Journal ArticleDOI
Efficient separation of chromium and vanadium by calcification roasting–sodium carbonate leaching from high chromium vanadium slag and V2O5 preparation
TL;DR: In this article, the effects of separation behaviors of chromium and vanadium under different roasting and leaching conditions were studied systematically, and XRD and SEM were used during the whole process.
References
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Journal ArticleDOI
Processing of vanadium: a review
R.R. Moskalyk,Akram Alfantazi +1 more
TL;DR: Vanadium is an important byproduct that is used almost exclusively in ferrous and non-ferrous alloys due to its physical properties such as high tensile strength, hardness, and fatique resistance as mentioned in this paper.
Journal ArticleDOI
Biological Chromium(VI) Reduction in the Cathode of a Microbial Fuel Cell
TL;DR: Analysis of the 16S rRNA gene based clone library revealed that the cathode biomass was largely dominated by phylotypes closely related to Trichococcus pasteurii and Pseudomonas aeruginosa, the putative Cr(VI) reducers.
Journal ArticleDOI
Asynchronous extraction of vanadium and chromium from vanadium slag by stepwise sodium roasting–water leaching
Hong-Yi Li,Hai-Xing Fang,Kang Wang,Wang Zhou,Zhao Yang,Xiao-Man Yan,Wen-sun Ge,Qian-Wen Li,Bing Xie +8 more
TL;DR: In this article, a novel approach based on stepwise roasting has been proposed to extract vanadium and chromium separately from vanadium slag with high chromium content (V-Cr slag), which consists of two stages of sodium roasting and water leaching.
Journal ArticleDOI
A novel method to extract vanadium and chromium from vanadium slag using molten NaOH-NaNO3 binary system
TL;DR: A new method using NaOH-NaNO3 binary melts to treat vanadium slag is proposed in this article, where vanadium and chromium can be simultaneously extracted in the leaching processes.
Journal ArticleDOI
Oxidation process of low-grade vanadium slag in presence of Na2CO3
TL;DR: In this paper, the authors investigated the oxidation process of low-grade vanadium slag in the presence of Na 2 CO 3 and showed that vanadium is oxidized in a temperature range from 273 to 700 °C.