Study of the main metallurgical characteristics of iron ore raw materials (sinter and pellets)

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

doi:10.1088/1757-899x/966/1/012061

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…According to the literature [36,37] up to a basicity of 0.5 the mineralogical composition and strength of the agglomerate remained almost unchanged, after which a sharp loss in the strength of the product began. This was due to the combined effect of many factors, including the appearance of bicalcium silicate and an increase in the total number of phases present in the sintered structure.…”

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

confidence: 97%

“…The level of internal stress in the sinter lumps is also more favorable at high basicity values. Thus, another method of preventing the polymorphic transformation of two-calcium silicate and loss of strength of fluxed agglomerates may be to receive and use in blast-furnace melting in appropriate proportions of two types of high-strength agglomerates: non-fluxed (basicity 0.4-0.7) and high-fluxed (basicity 2.0-3.5) [36,37].…”

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

confidence: 99%

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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: 97%

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

confidence: 99%

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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“…The sinter automatic ore blending mode can improve the stability of the operation, which is conducive to the production of sinter with stable chemical composition, uniform particle size, and good strength, reducing costs and improving productivity [4][5][6]. Iron and steel enterprises rationally adjust the raw material composition and particle size of sinter by combining mathematical methods and establishing a reliable ore blending system, which can effectively solve the problems of serious burning loss and production decline in the production of high-basic sinter [7][8][9]. Especially for an enterprise with a daily output of 20,000 tons of molten iron, any fluctuations in harmful elements and small cost differences will be magnified many times, eventually leading to serious consequences [10,11].…”

Section: Introductionmentioning

confidence: 99%

Research on Multi-Decision Sinter Composition Optimization Based on OLS Algorithm

Feng

Wang²,

Zhou³

et al. 2023

Metals

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The adjustment of sintering raw materials has a decisive influence on the composition of blast furnace slag and the properties of sinter. In order to smelt high-quality molten iron in the blast furnace, the composition of the sinter must be properly adjusted so that the composition of the blast furnace slag and the metallurgical properties of the sinter are optimal for the quality of the iron and are conducive to the smooth operation of the blast furnace. In view of the huge difference in the quality and price of sintering raw materials, this paper proposes an automatic sintering ore blending model to quickly configure sintering raw materials according to the requirements of the production line. This method is based on the calculation process of blast furnace charge, combined with the constraints of process composition and cost performance, to establish a multi-decision sintering ore blending model based on the OLS(Ordinary least squares) algorithm to automatically screen from available raw materials and give the sinter that meets the requirements of the furnace. The plan finally makes TFe, CaO, MgO, SiO2, TiO2, Al2O3, P, Mn, Na2O, K2O, Zn, and other components meet the requirements of the production line, and meet the cost performance requirements of the enterprise for sinter. The model can complete the screening and proportioning of 43 kinds of raw materials within 10 s, and its performance can meet the requirements of the production of variable materials. Combined with an example, a comparative analysis experiment is carried out on the accuracy and practicability of the designed sintering and ore blending model. The experimental results show that the accuracy and efficiency of the method proposed in this paper are higher than those of the current ore blending scheme designed by enterprise engineers. This method can provide an effective reference for the stable operation of the sintering production line.

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

Dmitriev

Vyaznikova

Vitkina

et al. 2022

DDF

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Strength characteristics of iron ore agglomerates of various basicity (mechanical strength and abrasion resistance, thermomechanical strength) have been investigated. The chemical and phase compositions of iron ore agglomerates, their microstructure and local chemical composition were analyzed. Dependences of the strength characteristics of iron ore agglomerates of various basicity on the morphology of silicate bond have been obtained. Dependences of influence of basicity of iron ore agglomerates on their strength characteristics depending on the proportion of phase components are obtained. It has been shown that an increase in the proportion of stabilized silicoferrite (SFCA) in the composition of agglomerates has a positive effect on their thermomechanical strength, which will increase the productivity of the blast furnace and significantly reduce the emission of dust.

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Study of the main metallurgical characteristics of iron ore raw materials (sinter and pellets)

Cited by 5 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

Research on Multi-Decision Sinter Composition Optimization Based on OLS Algorithm

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

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