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Bioleaching - Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt

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Direct Acid Leaching of Vanadium from Stone Coal

This paper focused on optimizing the process conditions of direct acid leaching process to enhance the leaching efficiency of leaching vanadium from the stone coal. Orthogonal experiments and single factor experiments were conducted to investigate the effect of the influential factors of direct acid leaching on vanadium leaching ratio.

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Acid Leaching of Vanadium from a Vanadium Residue

A process has been developed at the laboratory scale for leaching of vanadium from a vanadium residue using mixed hydrofluoric and sulfuric acid solutions, and NaClO as an oxidant. The extraction studies were carried out using various acid concentrations, liquid/solid ratios, addition of oxidant, reaction temperatures and leaching times. The optimum leaching conditions were then determined.

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vanadium stone crushing - ekhayawhiteriver

Calcified roasting-acid leaching process of vanadium from low ... Key words vanadium-containing stone coal; calcified roasting; acid leaching; vanadium extraction ... were crushed and ball-milled to -0.074 mm in size. Get Price

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Extracting Vanadium from Stone Coal by a Cyclic Alkaline ...

In order to achieve an efficient and economical approach on extracting vanadium from stone coal, a cyclic alkaline leaching method was studied in this work. The effects of operating parameters, including the NaOH concentration, temperature, reaction time, and liquid-solid ratio, on vanadium leaching efficiency were investigated.

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Vanadium Transitions during Roasting-Leaching Process of ...

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

Effect of K SO on solvent extraction of vanadium with 2 4 TBP

KEYWORDS: stone coal, pressure acid leaching, vanadium extraction INTRODUCTION With the increasing market demand for vanadium products and the shortage of high-grade ores, it becomes increasingly necessary and urgent to ex-ploit and utilize stone-coal resources for vanadium pentoxide production1. The stone coal is an im-portant vanadium-bearing ...

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Acid Leaching Of Vanadium From Black Shales Of Big Karatau.

In work [18] extraction of vanadium from black shales the activated leaching is offered. It is shown what, when using ore fineness of 45 microns, temperatures of process of 90 °C, time of a leaching of 120 min., concentration of sulfuric acid 100g/l with addition of CaF 2 60 of kg/t is reached extraction of 80%.

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Recovery of vanadium from alkaline leaching solution from ...

Recovery of vanadium from alkaline leaching solution from roasted stone coal Sisi Long a, Qiming Feng, Guofan Zhang;, Dongsheng Heb a School of Resources Processing and Bioengineering, Central South University, Changsha 410083 China b School of Environment and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073 China

  • Published in: Scienceasia · 2014Authors: Sisi Long · Qiming Feng · Guofan Zhang · Dongsheng HeGet Price

Recovery of vanadium from stone coal acid leaching ...

Apr 01, 2012 · Read "Recovery of vanadium from stone coal acid leaching solution by coprecipitation, alkaline roasting and water leaching, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Published in: Hydrometallurgy · 2012Authors: Puhong Ye · Xuewen Wang · Mingyu Wang · Yeye Fan · Xiaoyan XiangAffiliation: Central South UniversityAbout: Leaching · CoprecipitationGet Price

NEW PROCESS OF EXTRACTING VANADIUM FROM

vanadium-titanium magnetite, oil ash, waste vanadium catalyst, bauxite and stone coal. In addition, 75% to 85% vanadium production was extracted from vanadium-titanium magnetite1,2. A well-known roast-leach process is employed in the production of V 2 O 5 and NH 4 VO 3 from vanadium-titanium magnetite. Vanadium-titanium magnetite ore is

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A literature review on leaching and recovery of vanadium ...

Vanadium as an important national strategy resource is widely used in many fields due to its excellent physicochemical properties. Much attention had been focused on recovering vanadium from vanadium titano-magnetite and stone coal as they were the main vanadium resources in China.

Microwave-Assisted Leaching Vanadium from Stone Coal

Technological process of microwave-assisted leaching of vanadium with sulfate solution has been defined on the base of phase and chemical constituents of stone coal. The influence factors such as content of sulfuric acid, microwave power, and leaching time were studied on leaching rate of vanadium from the stone coal. One element experiments and orthogonal design experiments are carried out to ...

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Bioleaching - Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt

Get Price

Acid Leaching of Vanadium from a Vanadium Residue

A process has been developed at the laboratory scale for leaching of vanadium from a vanadium residue using mixed hydrofluoric and sulfuric acid solutions, and NaClO as an oxidant. The extraction studies were carried out using various acid concentrations, liquid/solid ratios, addition of oxidant, reaction temperatures and leaching times. The optimum leaching conditions were then determined.

[PDF]Get Price

Vanadium Transitions during Roasting-Leaching Process of ...

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.

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Extracting Vanadium from Stone Coal by a Cyclic Alkaline ...

In order to achieve an efficient and economical approach on extracting vanadium from stone coal, a cyclic alkaline leaching method was studied in this work. The effects of operating parameters, including the NaOH concentration, temperature, reaction time, and liquid-solid ratio, on vanadium leaching efficiency were investigated.

Get Price

Extraction of vanadium from the leach solution of stone ...

Jul 01, 2009 · Read "Extraction of vanadium from the leach solution of stone coal using ion exchange resin, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Published in: Hydrometallurgy · 2009Authors: Li Zeng · Qinggang Li · Liansheng XiaoAbout: Ion exchange · Coal · Ion-exchange resin · Hydrometallurgy · Carbon · VanadiumGet Price

A green method to leach vanadium and chromium from residue ...

Jan 11, 2018 · The sub-molten salt (SMS) technology, one of LPO technologies, had been successfully applied to leaching vanadium and chromium in concentrated alkali solution 10,11,12,13. In this new LPO method, the leaching efficiency of vanadium and .

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Direct Acid Leaching of Vanadium from Stone Coal

This paper focused on optimizing the process conditions of direct acid leaching process to enhance the leaching efficiency of leaching vanadium from the stone coal. Orthogonal experiments and single factor experiments were conducted to investigate the effect of the influential factors of direct acid leaching on vanadium leaching ratio.

Get Price

Draft Genome Sequence of the Vanadium-Leaching Bacterium ...

ABSTRACTPseudomonas chlororaphis strain L19, isolated from stone coal soil, has the ability to perform bioleaching to release vanadium ions from mineral ore. Here, we report the draft genome sequence and annotation of the vanadium-leaching bacterium Pseudomonas chlororaphis L19. These data provide information for understanding the genomic properties and mineral bioleaching mechanisms of strain ...

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