Investigation of an Aluminothermic Silicon Separation From a Corundum Matrix

Shevko, Viktor; Badikova, Alexandra; Amanov, D. D.; Karataeva, Gulnara; Lavrov, B.A.

doi:10.31788/rjc.2018.1132038

Cited by 5 publications

(5 citation statements)

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“…We have previously shown [20] that at the interaction of Ca3(PO4)2 with silicon dioxide, carbon, and iron under equilibrium conditions, at a temperature of 1850-1950°C, it is possible to obtain calcium carbide with a capacity of 300-360 dm 3 /kg and FS45 ferrosilicon (39-42% of Si) and to achieve the complete sublimation of phosphorus into gas.…”

Section: Methodsmentioning

confidence: 99%

Electric smelting of phosphorites with production of a ferroalloy, calcium carbide and sublimation of phosphorus

Uteyeva,

Shevko,

Aitkulov

et al. 2023

EJSU

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The article presents the results of a study of the interaction of phosphorites from the Chulaktau deposit of the Karatau basin with coke and steel shavings. The studies were carried out by computer thermodynamic modeling using the HSC-10 software package, together with mathematical planning of experiments, as well as by electric phosphorite melting in an electric arc furnace. On the basis of the conducted studies it was established that the joint formation of intermediate products from the systems Ca3(PO4)2-SiO2-C-Fe is possible at the temperature ˃ 1635-1702ºC. Based on the obtained volumetric and planar images of the coke and steel shavings effect on the technological parameters of the phosphorite's electric smelting, it was found that in order to produce FS25 grade ferrosilicon containing 20-30% of Si and calcium carbide with a capacity of 245.1-248.1 dm 3 /kg (2 nd grade), the process should be carried out in the presence of 52-58% of coke and 24.4-38% of steel shavings. In this case, the extraction degree of silicon into the ferroalloy was 70-80%, and calcium into calcium carbide -60-70%.

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Section: Methodsmentioning

confidence: 99%

Electric smelting of phosphorites with production of a ferroalloy, calcium carbide and sublimation of phosphorus

Uteyeva,

Shevko,

Aitkulov

et al. 2023

EJSU

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“…The Cu ion in the Zn-ferrite crystal increases the constant rate of 0.10 mmol min -1 and the Cu-ferrite see a reaction rate of 0.18 mmol min -1 . This activity of Cu containing ferrites can be demonstrated by the redox pair Cu + /Cu 2+ at the surface [24][25][26][27][28][29] .…”

Section: Ferrites As Catalytically By Hydrogen Peroxidementioning

confidence: 98%

Preparation, Structure and Catalytic Activity of Simple Spinel as Nano-Copper-Zinc Ferrites in Industry Model

Awad¹,

El‐Maghraby²

2018

RJC

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The crystallized Cu1-xZnxFe2O4 ferrites nanocrystalline has been prepared at low-temperature combustion route to study as a novel friendly environmentally benign fuel. Five batches of spinel as Cux Zn1-xFe2O4 were synthesis by a self-combustion method using nitrates as salt. The phase composition, crystal intensity and the nanostructure characteristics were resolved by x-ray diffraction and scanning electron microscope can be observations. BET analysis to indemnification the specific surface area around 20-10 nm. The results show an announced decrease in the combustion temperature when Cu-and Zn-ferrites spinel are utilized as catalysts effect. The ferrites have tested catalytically in combustion reaction of hydrogen peroxide.

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“…The increment of the Si amount at increased temperature is consistent with our XRD data where the intensity of the Si peaks was found to increase at the increased annealing temperature. In fact, it has been reported that aluminothermic reduction of quartz glass and aluminum powder at a temperature of 1260 °C yielded 91%, while reduction for the same time but at an increased temperature of 1300 °C yielded practically close to 100% of silicon (Lavrov et al, 2015;Shevko et al, 2018). Yoshikawa et al studied the aluminothermic reduction kinetics of soda-lime glass beads using aluminum scrap (Yoshikawa et al, 2006).…”

Section: Elemental Compositionmentioning

confidence: 99%

Formation of silicon layer through aluminothermic reduction of quartz substrates

Islam

Sawahata²,

Akimoto³

et al. 2022

Front. Mater.

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Silicon (Si) films were obtained through aluminothermic reduction of the quartz (SiO2) substrates, where the surface of the quartz in contact with the deposited aluminum (Al) layer has been converted to film Si during high-temperature annealing following reduction reaction. X-ray diffraction (XRD) patterns and Raman spectra show dominating peaks corresponding to elemental Si in the obtained films. Energy dispersive spectroscopy (EDS), as well as XRD of the obtained Si layer, suggests that reduction products consist of mainly elemental Si mixed with oxides of Al-related phases. Both the higher reaction temperature and high initial Al-content (larger thickness of Al film in Al/SiO2 structure), studied in this paper, were found in favor of obtaining higher contents of Si in the obtained films. Thus, crystallinity and quality of the obtained Si-layer improve with the increase of both reduction temperature as well as thickness of the Al layer, as confirmed by XRD and Raman spectra. The aluminothermic reduction mechanism has been discussed using XRD as well as a ternary phase diagram of the constituent elements, obtained from EDS data. Crystalline nature (nanocrystal to microcrystal to polycrystal) and the crystalline quality of the obtained Si layers were found to be affected by the thickness of the deposited Al layer on SiO2 substrates.

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Investigation of an Aluminothermic Silicon Separation From a Corundum Matrix

Cited by 5 publications

References 0 publications

Electric smelting of phosphorites with production of a ferroalloy, calcium carbide and sublimation of phosphorus

Electric smelting of phosphorites with production of a ferroalloy, calcium carbide and sublimation of phosphorus

Preparation, Structure and Catalytic Activity of Simple Spinel as Nano-Copper-Zinc Ferrites in Industry Model

Formation of silicon layer through aluminothermic reduction of quartz substrates

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