Study of the Strength Characteristics of Agglomerate Depending on its Structure and Phase Composition

Dmitriev, Andrey N.; Vyaznikova, Elena A.; Vitkina, Galina Yu.; Alektorov, Roman V.

doi:10.4028/p-0g7e07

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…This law applies fully to the rate of reduction of magnetite and hematite crystals. However, the degree of anisotropy is substantially different: the reduction rates of magnetite crystals in different directions differ from each other by no more than 20-25%, hematite-by 35-45%, and more [40].…”

Section: Relationship Between Structure and Metallurgical Characteris...mentioning

confidence: 98%

A Study of the Structure and Physicochemical Properties of the Mixed Basicity Iron Ore Sinter

Dmitriev,

Vyaznikova,

Vitkina

et al. 2023

Magnetochemistry

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To study the influence of sinter basicity on the microstructure, phase composition, and physicochemical and metallurgical properties, samples of agglomerates with different basicities were sintered and investigated. A comprehensive study of the structure, composition, chemical, and metallurgical properties of the sinter was conducted, and the optimum values for these properties were determined. The results of the mineralogical transformations that occurred during the sintering process are also presented. The magnetite contained in the concentrate partially dissolves in the silicate component and flux during agglomeration, forming a complex silicate SFCA with the general formula M14O20 (M–Ca, Si, Al, and Mg), which is the binder of the ore phases of the agglomerate. The proportion of ferrosilicates of calcium and aluminum in the sinter depends on the basicity of the sinter charge, and the morphology of the SFCA phase depends on the cooling rate of the sinter. The more CaO in the sinter charge, the more SFCA phase is formed in the sinter, and slow cooling results in the growth of large lamellar and dendritic SFCA phases.

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Section: Relationship Between Structure and Metallurgical Characteris...mentioning

confidence: 98%

A Study of the Structure and Physicochemical Properties of the Mixed Basicity Iron Ore Sinter

Dmitriev,

Vyaznikova,

Vitkina

et al. 2023

Magnetochemistry

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“…During the sintering of the agglomerate at the layer level, the interrelated processes of mineralization in the solid phases, formation of liquid phases, impregnation of solid particles by liquid phases, and chemical interactions with them take place [1]. The main phases in the resulting agglomerates are magnetite (Fe3O4), hematite (Fe2O3), and silicate compounds of different compositions [2].…”

Section: Introductionmentioning

confidence: 99%

Study of Softening Temperature Range of Agglomerate Depending on its Structure and Phase Composition

Dmitriev,

Vyaznikova,

Vitkina

et al. 2023

DDF

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The initial and final softening (melting) temperatures of redesigned iron ore agglomerates with basicities from 1.2 to 3.0, obtained under laboratory conditions, were investigated. The chemical and phase compositions of the laboratory agglomerates, their microstructures and local chemical compositions, the temperatures at the beginning and end of softening (melting), and the temperature interval of softening were studied. Dependencies of the influence of the basicity of iron ore agglomerates on their softening temperature interval, depending on the proportion of phase components, were obtained. It is shown that as the basicity and proportion of silicoferrite SFCA phases increase, the temperatures at the beginning and end of the softening increase and reach a maximum of 1200 and 1312 °С, respectively (at the basicity of the agglomerate of 1.8), after which the temperatures decrease. Simultaneously, the softening interval increased from 73 to 112 °C.

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Study of the Strength Characteristics of Agglomerate Depending on its Structure and Phase Composition

Cited by 2 publications

References 10 publications

A Study of the Structure and Physicochemical Properties of the Mixed Basicity Iron Ore Sinter

A Study of the Structure and Physicochemical Properties of the Mixed Basicity Iron Ore Sinter

Study of Softening Temperature Range of Agglomerate Depending on its Structure and Phase Composition

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