reserves of vanadium Stone coal is a kind of carbonaceous shale which looks like coal but mostly consists of quartz and with a low calorific value [2] Typically vanadium in stone coal exists in the isomorphism like form in which vanadium replaces trivalent aluminum in the mica structure [3] The mica structure is stable so the key step of extracting vanadium from …
vanadium resource in China due to its vast deposit 3 Most of the V in stone coal 4 6 Hence the V in stone coal is stable and difficult to sulfuricacidleachinga erhightemperature roasting is widely used due to its good adaptability to raw materials high efficiency and environmental 10 However …
Synergistic solvent extraction of vanadium from leaching solution of stone coal using D2EHPA and PC88A Separation Science and Technology 2022 181 1 7 16 H I Kim G Moon I Choi J Y Lee R K Jyothi Hydrometallurgical process development for the extraction separation and recovery of vanadium from spent desulfurization catalyst bio leach liquors Journal of Cleaner …
· Aiming at reducing the difficulties in extracting vanadium from stone coal and solving its relevant pollution problem in the current method Yan Yan et al 2022 proposed a novel approach to pre concentrate vanadium efficiently and cleanly as the first step of extracting vanadium from stone coal
· Roasting experiments were performed to characterize the effects of biomass on extracting vanadium of stone coal The results indicated that kalium in biomass catalyzed the formation of potash feldspar but inhibited the generation of insoluble anorthite selectively and effectively improved the vanadium leaching rate The optimal roasting conditions were …
· Method of extracting vanadium by countercurrent acid leaching of clinker obtained as a result of calcining roasting includes the stages a first leaching stage on which clinker obtained as a result of calcining roasting is mixed with a leaching liquid adding sulphuric acid for the first leaching step adjusting the pH value of the system at the first stage of the …
【】：To extract vanadium in an environment friendly manner this study focuses on the process of leaching vanadium from vanadium slag by high pressure oxidative acid of the raw slag mineralogy transformation and the form of leach residues were made by X ray diffraction scanning electron microscopy and energy dispersive …
Stone coal production declined slightly year on year as low prices disincentivised production Although stone coal producers could be re incentivised by higher prices environmental financial and technical constraints remain Historically vanadium supply and demand has relied upon steel supply and demand respectively The limited capacity of vanadium producing steel …
Efficient extracting vanadium from stone coal by co roasting with sodium chloride and biomass G Q Liu School of civil engineering University of science and technology Liaoning AnShan China K Liu School of civil engineering University of …
· managing to extract whatever little that is practically possible from a situation/ from something make the most of a situation realization of the futility of trying to benefit from a situation or from something Lisa Romano Squeezing Water From a Stone How to Get More From Existing Capacity and Add More to Your Bottom Line
Environmental reasons continue to reduce the output of enterprises who can extract vanadium from stone coal As far as we know in September there are 3 new vanadium extraction enterprises in Hunan 2 of which are newly shut down in Hubei and it is difficult to resume production in the short term According to incomplete statistics the output of 26 stone coal …
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 % of the vanadium was …
· The technology of extracting vanadium from stone coal in China history current status and future prospects Hydrometallurgy 2022 109 1 116 [Google Scholar] Zhang B Feng C Ni J Zhang J Huang W Simultaneous reduction of vanadium V and chromium VI with enhanced energy recovery based on microbial fuel cell technology J Power
however suitable for vanadium recovery from stone coal with high alumino silicate content because of the requirement for high roasting temperatures Although the utilization of NaCl16 or Na 2SO 4 ref 17 was relatively effective for vanadium extrac tion from stone coal it was gradually restricted in China because of serious poisonous emissions of Cl 2 HCl or SO …
In this paper the composite additive of CaF2/CaO was used to extract vanadium from stone coal and the effect of roasting and leaching kinetics were
China also has a lot of stone coal vanadium resources belongs to the low grade vanadium resources and vanadium content of stone coal vanadium ore with total reserves of stone coal vanadium ore resource in the world containing vanadium from stone coal are mainly distributed in hunan guangxi hubei provinces in our country The total stone coal reserves are …
· Some companies have begun to extract vanadium from stone coal by the classical technology since the 1970s The brief flow of such technology includes chloridizing roasting water leaching deposition alkali melting and thermal decomposition[8] These classical technologies have two main problems namely low recovery of vanadium 50% and serious environment …
Study on Extracting Vanadium by Adding Barium Sulfate Roasting Acid Leaching from Clay Vanadium Ore ZHU Jun 1 2 KANG Min 1 LI Weiliang 1 WANG Bin 1 2 QI Jianyun 3 LI Shu 1 LIU Danyang 1 1 School of Metallurgical Engineering Xi′an University of Architecture and Technology Xi′an 710055 China 2 Shaanxi Provincial Advanced Energy Storage and …
Vanadium bearing stone coal is an important vanadium resource in China hence vanadium extraction from stone coal is paid more attention to in this country At present acid leaching with H 2 SO 4 have been widely adopted for vanadium leaching from stone coal due to the merits of high vanadium recovery and low pollution [1 2] In order to improve the vanadium leaching …
vanadium recovery was % KEYWORDS vanadium pentoxide purification extraction INTRODUCTION The classical technology for extracting vanadium from stone coal has two main problems low vanadium recovery <50% and the production of environmen tal pollutants1 2 and is therefore being eliminated gradually In recent years researchers have
extraction of vanadium if research on stone coal after extracting vanadium continues the utilization of stone coal resources will be fully e ectively and reasonably developed Due to the complex mineral composition of stone coal in order to fully exploit and utilize abundant stone coal resources and guide the preparation of composite materials using stone coal as a raw …
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Extracting vanadium from stone coal by oxygen pressure acid leaching and solvent extraction DENG Zhi gan WEI Chang FAN Gang LI Min ting LI Cun xiong LI Xing bin Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China Received 6 July 2022 …
Abstract 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 was proposed by adding calcined lime in roasting process followed by H2SO4 leaching The effects of parameters including roasting temperature roasting time addition mass ratio of NaCl calcined lime upon …
In order to search for a more economical and effective roasting additive for extracting vanadium from stone coal and solve the question of the disposal of PVC waste PVC waste was proposed as a novel roasting additive to enhance extraction of vanadium from stone coal and realize the comprehensive utilization of resources By adding this roasting additive the leaching rate of …
· The fusion of the leaching and purification processes was realized by directly using microemulsion as the leaching agent The bis 2 ethyhexyl phosphoric acid DEHPA / n heptane/NaOH microemulsion system was established to directly leach vanadates from sodium roasted vanadium slag The effect of the leaching agent on the leaching efficiency was …
The Bureau of Mines conducted laboratory studies on Idaho mudstones to examine techniques for extracting vanadium Recovery of vanadium from low grade sources could contribute to future vanadium production and reduce reliance on imports An Idaho mudstone surface sample containing pct v2o5 and an underground sample containing pct v205 were used in …
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 % % % and % respectively under the optimum dilute sulfuric acid dephosphorization DSAD two stage pressure acid leaching …
The process of extracting vanadium from stone coal mainly includes sodium roasting process sodium oxidation roasting water leaching hydrolysis vanadium precipitation alkali soluble ammonium salt vanadium precipitation pyrolysis ammonia removal refined vanadium This process is widely used to extract vanadium from stone coal in China It is characterized by …
Currently techniques used to extract vanadium from stone coal mainly include direct acid leaching roasting acid leaching roasting alkali leaching calcified roasting carbonate leaching and low salt roasting cyclic oxidation He et al 2022 Wang et al 2022 Zhang et al 2022 Li et al 2022 Zhang et al 2022 However the composition of stone coal is extremely complex …
· Journal Article Study on leaching vanadium from roasted residue of stone coal
This paper proposed a novel roasting process of extracting vanadium from high chromium vanadium slag In this process the high chromium vanadium slag was treated by NaOH NaNO 3 binary sodium salts roasted in microwave heating furnace and leached by water During the roasting process the temperature and time took a significant role in the conversion of …
· Vanadium is a rare and precious metal and is prodigiously dispersed in the earth s crust There are only a few independent vanadium minerals China s vanadium resources are mainly found as vanadium titanium magnetite and stone coal In recent years the extraction of vanadium from stone coal has become an important project in the
In China stone coal is an important source of vanadium The use of roasting floatation for the pre concentration of vanadium bearing mica from vanadium bearing stone coal was investigated based on its mineralogical characteristics The results showed that the vanadium occurred in mica minerals and the main gangue minerals were coal calcite
Trialkylamine N235 diluted with sulfonated kerosene containing tri butyl phosphate was used to separate 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 Variations in aqueous pH exhibited good extraction of vanadium at an equilibrium pH of
· Vanadium and its compounds are widely used in petrochemical industry catalyst and iron and steel because of their excellent physicochemical properties 1−5 In China the main resources for vanadium recovery are vanadium titanomagnetite uranium bearing sandstone bauxite stone coal and so forth 6−8 A byproduct named high chromium vanadium slag …
· Hydrochloric acid leaching has been widely used in the recovery process of vanadium due to its efficient selectivity It was necessary to further separate vanadium from hydrochloric acid leaching solution Four extractants of P204 P507 Cyanex272 and N1923 were compared for extraction of vanadium from a simulated hydrochloric acid solution and it is …
In stone coal the vanadium exists mostly as trivalent vana dium V III tetravalent and pentavalent vana dium are very scarce4 7 V III replaces Al III isomorphically in muscovite lattice which means that vanadium in stone coal is difficult to extract The conventional process flow of vanadium re covery from stone coal includes
CN 111334675 A chemical patent summary
· A novel method to extract vanadium and chromium from vanadium slag using molten NaOH NaNO 3 binary system Biao Liu Biao Liu National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy …