slag penumpasan vanadium

Kinetics analysis of decomposition of vanadium slag by …

Further, the vanadium slag usually contains 3%−6% chromium (III) oxide in the form of chromium spinel, which is more stable than vanadium spinel thermodynamically. Consequently, the chromium compounds in the vanadium slag cannot be recovered at vanadium roasting temperatures, a large amount of chromium containing tailings were produced, threating

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Mechanism of Vanadium Leaching during Surface Weathering ...

 · 1. Environ Sci Technol. 2017 Jul 18;51(14):7823-7830. doi: 10.1021/acs.est.7b00874. Epub 2017 Jul 6. Mechanism of Vanadium Leaching during Surface Weathering of Basic Oxygen Furnace Steel Slag Blocks: A Microfocus X-ray Absorption Spectroscopy and Electron Microscopy Study.

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Efficient Separation of Silicon and Vanadium by Sodium ...

The Na2CO3 was added to the vanadium slag at 20% mass fraction, roasted at 790 °C, and kept for 120 min, the roasted sample was added to the deionized aqueous solution with a liquid-solid ratio of (L/S) 5mL/g, and then heated at 90 °C for 60 min, 89.54% vanadium and 1.96% chromium were extracted.

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SLAG RECYCLING OF IRRADIATED VANADIUM

SLAG RECYCLING OF IRRADIATED VANADIUM Submitted in Partial Fulfillment of the Requirements for Graduation with Honors to the Department of Biology and Chemistry at Carroll College, Helena, Montana Patricia Kathleen Gorman April 7,1995 I 5962 00078 169.

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AN OVERVIEW OF SOUTH AFRICA ˇS VANADIUM INDUSTRY …

Highveld Steel and Vanadium Corporation is the largest, followed by Vametcor and Rhovan at distant second and third place, respectively. Highveld Steel and Vanadium Corporation ˇs Vanchemplant sources the magnetite ore from the Mapochs mine in Mpumalamga, and 20 percent vanadium-bearing slag produced from the steel making plant.

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Asynchronous extraction of vanadium and chromium from vanadium slag by stepwise sodium roasting–water leaching. Hydrometallurgy. 2015, 156: 124-135. Hong-Yi Li*, Xin Qiu, Meng Dong, Xinlu Li, Yuxin Zhang, Bing Xie. Tuned hydrothermal synthesis of vanadium dioxide nanotubes.

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Behaviour of Vanadium in EAF slags | Request PDF

The study described in this paper is focused on the behaviour of Vanadium in EAF slags, in terms of stability of Vanadium oxides in the morphological structure of the slag and Vanadium ...

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Vanadium Recycling in the United States in 2004

vanadium concentration in such slag is not sufficient for eco-nomic recovery. Vanadium is recovered from the dust. The remaining 6 percent of U.S. reported consumption of : vanadium (232 t) was used to manufacture superalloys, other alloys (many for aerospace applications), and chemicals (for

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Recovery of Vanadium from a High Ca/V Ratio Vanadium Slag ...

In the present paper, the oxidation and leaching process of vanadium slag was investigated by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectrometry (SEM/EDS) techniques. The effects of ammonium carbonate concentration, leaching temperature and leaching time on the leaching ratio of vanadium were discussed.

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A method of processing converter slag containing vanadium

This technical result is achieved by a method for processing vanadium-containing Converter slag includes oxidation-atribuudi burning slag with soda, acid leaching, hydrolytic allocation of vanadium compounds. A distinctive feature is the fact that before acid leaching the calcine directly after firing serves in water, acid leaching is carried ...

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Vanadium (V): Proses Terbentuknya

 · Vanadium (V): Proses Terbentuknya – Kegunaan – Jenisnya. Dalam ilmu kimia, vanadium (V) adalah unsur kimia yang berada di Grup 5 dalam sistem periodik. Unsur kimia ini ditemukan oleh mineralogi Spanyol Andrés Manuel del Río pada tahun 1801. Namun, setelah ia sadar bahwa vanadium hanya sebatas kromium yang tidak murni, unsur kimia ini ...

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Vanadium processing | Britannica

Vanadium processing, preparation of the metal for use in various products.. Vanadium (V) is a grayish silver metal whose crystal structure is a body-centred cubic (bcc) lattice, with a melting point of 1,926° C (3,499° F). The metal is used principally as an alloying addition to high-strength low-alloy (HSLA) steels and, to a lesser extent, in tool steels and iron and steel castings.

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(PDF) Leaching of vanadium from LD converter slag using ...

Effect of sulfuric acid concentration Fig. 4 shows the effect of acid concentration on the percentage of vanadium extracted (recovery, %R) as a function of leaching time from LD converter slag for the particle size of below 0.850 mm, at 70 °C, S/L of 1:15 (g/mL), 90 min, particle size 0.850 mm.

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Vanadium''s electric future hobbled by its industrial past ...

 · Just to compound this evolving supply challenge, Beijing has also banned the import of four types of vanadium slag, cutting off around 4,500-5,000 tonnes of …

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BOF steel slag as a low-cost sorbent for vanadium (V ...

 · Effect of steel slag particle size on vanadium removal (at room temperature, 200 rpm, initial pH 6, steel slag 5.0 g, initial vanadium concentration 100 mg/L). Effect of the initial pH This study focused on the initial pH of the vanadium bearing solutions, because many factors affect the pH of real soil washing effluents, such as the types of ...

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About Vanadium – Bushveld Minerals

Vanadium is a grey, soft and ductile high-value metal with several unique characteristics that position it strongly in the steel, alloys and chemicals sectors. Vanadium feedstock is derived from 3 sources: co-production, primary production and secondary production. In 2019, ~90 % of vanadium was recovered from magnetite and titanomagnetite ores ...

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Vanadium

Vanadium is a chemical element with the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal.The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) somewhat stabilizes the free metal against further oxidation.. Andrés Manuel del Río discovered compounds of vanadium in 1801 in Mexico by ...

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NEW PROCESS OF EXTRACTING VANADIUM FROM

Molten vanadium slag roast-leaching experiments In all the roasting experiments, an Al 2 O 3 crucible containing vanadium slag was placed in a furnace and heated to 1450°C at the rate of 10°C/min in an open atmosphere. The whole apparatus profile is shown in Figure 2. Holding 1450°C for 5 minutes made the vanadium slag melt fully.

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Making Vanadium | Vanitec

Ferrovanadium is available in alloys containing 40%, 60% or 80% vanadium. The 60% and 80% grades are mostly produced by the aluminothermic reduction of vanadium oxides in the presence of steel scrap or by direct reduction in an electric furnace. The 40% grade is produced from slag and other vanadium products by the silicon reduction process.

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RECOVERY OF VANADIUM FROM V-BEARING BOF-SLAG …

The composition of the treated BOF-slag with high vanadium content and the used slag formers, sand and bauxite, are shown in Table 1 and the reductants in Table 2 below. Table 1: Chemical composition of the oxide materials used in the pilot campaign. Particle size of BOF-slag and sand was -6+2mm and for Bauxite -5+3mm.

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BOF steel slag as a low-cost sorbent for vanadium (V ...

 · The initial pH and vanadium concentration did not play key roles. At the optimum particle size (<0.15 mm) and dosage (50 g/L), the removal rate reached 97.1% when treating 100 mg/L of vanadium.

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Asian Metal

Asian Metal provides comprehensive coverage and analysis of the global vanadium industry. Professional & reliable reports outline the latest trends and developments, keen & precise price analysis keeps you at the cutting edge of the market, and exclusive statistics on both imports & exports as well as production and marketing provide the tools to take your business to the next level.

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Method of producing vanadium pentoxide from vanadium ...

The technology relates to the field of chemical production and can be used to extract pure by vanadium from the slag obtained during its production, which can serve as raw material for the production of metallic vanadium or used in the chemical industry as a catalyst for alloying of steel, to create a hard oxide compositions in high technology and other industries.

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Preparation of V2O5 from converter slag containing vanadium

Preparation of V2O5 from converter slag (CS) was investigated through roasting, leaching, extracting, and precipitating processes. The corresponding roles of the parameters during every procedure were analyzed in detail. (NH4)2SO4 and KHSO4 were used as fusing agents to transform compounds containing vanadium into soluble species. Mass ratio of (NH4)2SO4 to CS, mass ratio of KHSO4 to …

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VANADIUM PENTOXIDE

Vanadium pentoxide is also commercially available in South Africa as granular and R-grade powders with a minimum purity of 99.5% and grain sizes of > 45 µm and < 150 µm, respectively (Highveld Steel & Vanadium Corporation Ltd, 2003). 1.1.5 Analysis Occupational exposure to vanadium pentoxide is determined by measuring total vana-

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The method of obtaining vanadium-containing slag ...

The closest in technical essence is a method for vanadium slag processing vanadium cast iron monoprocessor, including fill in the Converter vanadium cast iron, the supply of lime, fluorspar, magnesium-containing material providing the content of magnesium oxide in vanadium slag in the range of 5-20%, and the melt blowing of oxygen through the ...

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Reaction Mechanism of Magnesium in Roasting of Vanadium Slag

Vanadium slag is a crucial raw material for preparing vanadium and steel material containing vanadium in the present research. For the traditional vanadium production process, the vanadium slag is used to be roasted with sodium salt or calcium salt (Voglauer et al. 2004 VOGLAUER B, GRAUSAM A & JÖRGL HP. 2004. Reaction-kinetics of the vanadium ...

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Direct Alloying of Molten Steel with Vanadium Slag as a ...

A direct alloying technology of molten steel by the vanadium slag briquette via self-reduction reaction was proposed. From the perspective of selective reduction, a theoretical analysis on the variation of equilibrium compositions including slag and metal phases was carried out based on the Gibbs energy minimization principle. The self-reduction behavior of vanadium slag briquettes with ...

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Ferrovanadium

The vanadium loss with the slag can be reduced by using additional heating at the end of the process. In this case the smelting starts in the furnace (350 kVA) with risen electrodes and proceeds normally without a power supply (Gasik et al., 2009). Upon finishing, the power is turned on and the slag and metal are heated and mixed to improve ...

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Vanadium (V) : Sejarah, Kegunaan Dan Bahaya

 · Pengertian Vanadium (V) : Sejarah, Kegunaan Dan Bahaya. Sejarah Vanadium. Vanadium ditemukan pertama kali oleh del Rio pada tahun 1801. Sayangnya, seorang ahli kimia Perancis dengan salah menyatakan bahwa unsur baru del Rio hanyalah krom yang tidak murni. Del Rio pun menyangka dirinya salah dan menerima pernyataan ahli kimia Perancis itu.

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RU2118376C1

FIELD: ferrous metallurgy. SUBSTANCE: invention deals with conversion of vanadium cast iron into vanadium slag and semiproduct in oxygen converter followed by converting semiproduct into steel in another converter. As cooling agents in vanadium cast iron conversion process, 10-120-mm fractions of dross and metal waste are used, which are added into converter after cast iron is charged and/or ...

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Recycle of vanadium from aluminum slag of ferrovanadium ...

Vanadium is a rare chemical element and it primarily comes from the by-product of other minerals. In this study, the material source mainly comes from vanadium-rich aluminum slag. This experiment aims to separate vanadium and other impurities, such as aluminum and zirconium. First, the slag was dissolved in the sodium hydroxide solution at pH value 13, and part of the alumina was precipitated.

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CN101362192A

The invention discloses a composite slag agent containing rare earth elements, which belongs to the field of ferrous metallurgy and more particularly relates to the solving of the problem that the phenomena that bags and tanks are adhered by high viscosity vanadium-titanium slag exist in the transportation and storage process of blast-furnace molten iron which uses iron ores containing ...

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Vanadium Statistics and Information

Vanadium, when present in small amounts in certain ferrous alloys, can significantly improve their properties. Manufacturers of automobiles and machinery recognized the toughness and fatigue resistance of vanadium alloys as far back as the early 1900''s, incorporating the alloys in axles, crankshafts, gears, and other critical components.

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Extractive Metallurgy of Vanadium-Containing Titaniferous ...

 · Vanadium transfer from metal into slag is 85%. The semifinished product is 3.0% C and 0.03% V and small amounts of Si, Mn, Ti, P and S. The vanadium in the slag …

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Vanadium Slag | Scientific

Abstract: Vanadium slag is a kind of common furnace slags in the metallurgical field that contains rich vanadium oxides and iron oxides. The high value added utilization of vanadium slag was exploratory studied in this paper. Under the existing experimental conditions, chemical reactions conducted between vanadium slag and concentrated sulfuric ...

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