Influence of Basicity and Calcium-Containing Substances on the Consolidation Mechanism of Fluxed Iron Ore Pellets

Li, Kuo; Chen, Feng; Guo, Yanxia; Liu, Yajing; Wang, Shuai; Yang, Lingzhi

doi:10.3390/met12061057

Cited by 8 publications

(3 citation statements)

References 25 publications

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“…The required number o fluxes is determined by the melting diagram of the SiO2-MgO-Al2O3 ternary system (Fig ure 5). Optimal areas of phase compositions of slag are marked by dots on the diagram hence, the composition of slag in the smelting of high-carbon ferrochrome conversion i as follows, %: SiO2 27-33 (34)(35)(36); ; Al2O3 26-30 (20)(21)(22)(23)(24)(25)(26); Cr2O3 < 8 (3-6 The polished sections (anschliffs) of samples of two alloys and one slag were made All samples were viewed under microscopes LEICA DM 2500P and selectively electron probe microanalyzer Superprobe 733 made by JEOL, Japan. The method of X-ray spectra microanalysis was used in the study of samples.…”

Section: Resultsmentioning

confidence: 99%

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Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

Ultarakova,

Tastanov,

Sadykov

et al. 2023

J. Compos. Sci.

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This study presents the results of the enlarged laboratory research on the melting of calcined composite pellets for ferrochrome obtained from fine-dispersed conditioned chrome concentrate containing 50.3% Cr2O3. This is a product of the gravitational beneficiation of waste sludge tailings from the Dubersay tailings dump at the Donskoy Mining and Processing Plant (DMPP) of JSC “TNC Kazchrome”. The composition of the charge for obtaining composite pellets consisted of 88.5% of chrome concentrate, 3% of mineral part of refined ferrochrome slag (RFC), 4% of ferruginous diatomite, 3% of coke and 1.5% of liquid glass. The initial charge was pelletized on a laboratory pelletizer to a size of 6–10 mm, dried at room temperature for 24 h and fired at 1200 °C for 60 min at a heating rate of 15 deg/min. On the basis of the developed composite annealed pellets, studies on the production of high-carbon ferrochrome at different melting temperatures were carried out. The results showed that with an increase in temperature from 1750 to 1850 °C, the iron–chromium phase in the composition of the alloy increases from 45.2 to 50.1%, the chromium carbide phase decreases from 23.7 to 11.3% and the chromium–iron phase increases from 7 to 11.2%. The carbon content in the alloys at temperatures from 1750 to 1850 °C varies from 7.2 to 8.94%, respectively. The maximum chromium content of the alloy is 64.82% with a melting point of 1850 °C; this alloy can be classified as FeCr60C90LP grade ferrochrome according to the international Chinese standard, which has no more than 0.03% phosphorus and no more than 0.1% sulfur.

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Section: Resultsmentioning

confidence: 99%

“…The idea of using silica-containing wastes as fluxes for producing iron ore pellets is described in [21,22]. Kazakh scientists also proposed to produce ferrofluxing binders for producing strong chromium pellets [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

Ultarakova,

Tastanov,

Sadykov

et al. 2023

J. Compos. Sci.

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“…The ratio of iron oxide to calcium oxide in the sludge mixture intended for processing should be 1:2-1:4. Calcination of the mixture at 900 • C allows obtaining calcium ferrite suitable for use as an anticorrosive pigment [18,19].…”

Section: Introductionmentioning

confidence: 99%

Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

et al. 2023

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This article presents the complex processing of low-grade and substandard chromium ores, as well as sludge tailings, with the production of composite chromium-containing materials and pigments, while improving environmental performance in the Republic of Kazakhstan through the utilization and processing of technogenic raw materials. In this work, to study the physicochemical properties of the starting materials, modern analytical, thermodynamic, chemical, granulometric, as well as computational, mathematical, laboratory, and experimental methods were used. In particular, studies of a method for producing composite pellets for chromite pigments based on industrial technogenic waste of the Republic of Kazakhstan are presented. Based on the results of the experimental studies, composite pellets were obtained, having a compressive strength of 150–220 kg/pellet and containing 49.7% of chromium oxide and 0.5–1.0% of carbon in its composition. The resulting chromite pigment based on the composite pellets is a modification of chromium oxohydroxide with the formula γ-CrOOH. The density of the resulting pigment is 3.4 kg/m3. The chromite pigment based on the composite pellets is recommended for use in various coloring compositions, including using it for printing on cotton and mixed fabrics intended for sewing outerwear.

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Interface Diffusion and Reaction Mechanisms of Fe3O4–MgO System in Pellets Under Different Atmospheres

Zhang,

Lin,

et al. 2024

Metall Mater Trans B

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Influence of Basicity and Calcium-Containing Substances on the Consolidation Mechanism of Fluxed Iron Ore Pellets

Cited by 8 publications

References 25 publications

Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

Interface Diffusion and Reaction Mechanisms of Fe3O4–MgO System in Pellets Under Different Atmospheres

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