The Phase Composition Change During Solid-Phase Carbothermal Reduction of a Complex Oxide With Low Iron Content

Зырянов, С.В.; Bilgenov, A.S.; Гамов, П.А.; Zyryanov, S.V.

doi:10.14529/met180102

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…In previous work [8] it was determined by X-ray diffraction and micro-X-ray spectroscopy methods that the solid-phase carbothermal reduction of Fe 2 + , Co 2+ The average chemical composition by area in spectra and the composition of the metal particles after direct and indirect reduction are shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

Metallographic Estimation of the Number of Forming Metallic Particles Obtained during Direct and Indirect Reduction of Metals from Complex Oxides

Bilgenov¹,

Гамов²,

Roshchin

2019

MSF

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The direct reduction of metals from a complex oxide with low iron content by solid carbon and indirect reduction by CO gas were studied in a vertical laboratory resistance furnace at 1300 °C for an hour reduction time. The experimental results were described from the point of view of the electrochemical nature of the metal reduction process, that involves the interaction of ions and electrons in the oxide lattice. The technique was developed by using the two different software programs for the quantitative estimation of the areas, average size and number of the metal forming in a complex oxide with extensive fields of vision. The obtained results of the quantitative characteristics of the metal forming during solid-phase carbo-thermal reduction were presented. The processes of reduction by solid carbon and CO gas based on the areas occupied by metal particles were quantitatively compared. The experimental results and the prospects for further experimental work were assessed and outlined.

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Section: Resultsmentioning

confidence: 99%

Metallographic Estimation of the Number of Forming Metallic Particles Obtained during Direct and Indirect Reduction of Metals from Complex Oxides

Bilgenov¹,

Гамов²,

Roshchin

2019

MSF

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“…Using previously developed technique [17][18][19][20], a series of experiments on solid-phase metal reduction was conducted in dunite under various temperatures and holding times (Table 1). A total number of 1439 fields of view were examined and 542483 iron particles were detected.…”

Section: Materials and Experimentalmentioning

confidence: 99%

Influence of Temperature and Holding Time on Number and Size of Metal Particles during Solid-Phase Reduction of Iron by Carbon

Bilgenov

Tabylbaeva

Гамов

2021

SSP

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There is a lack of complete understanding of the mechanism and kinetics of reduction of metals from oxides. This paper presents results and methods of a series of experiments on direct reduction of metals by solid carbon in the form of graphite from a complex oxide with a low iron content in a laboratory muffle furnace at temperatures of 1300, 1400, 1500, 1600 °C and holding time of 1, 3, 5, 7 hours. The statistical analysis of amount and average size of reduced iron particles inside the oxide was studied. Dependence of amount and average size of the reduced iron particles on temperature and time of reduction is presented. The phenomena of iron crystals’ growth, occurring as a result of changes in the crystal lattice of oxide, was studied under experimental conditions. The influence of temperature and holding time on iron particles’ nucleation and their growth in the crystal lattice of a complex oxide were compared. Investigation of mechanism of metals’ reduction from complex oxides and influence of experimental conditions on the nucleation and growth enables to identify new patterns in the process of reduction of metals from their oxides, in general.

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The Phase Composition Change During Solid-Phase Carbothermal Reduction of a Complex Oxide With Low Iron Content

Cited by 2 publications

References 9 publications

Metallographic Estimation of the Number of Forming Metallic Particles Obtained during Direct and Indirect Reduction of Metals from Complex Oxides

Metallographic Estimation of the Number of Forming Metallic Particles Obtained during Direct and Indirect Reduction of Metals from Complex Oxides

Influence of Temperature and Holding Time on Number and Size of Metal Particles during Solid-Phase Reduction of Iron by Carbon

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