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

IF 2.6 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Magnetochemistry Pub Date : 2023-09-22 DOI:10.3390/magnetochemistry9100212

Andrey N. Dmitriev, Elena A. Vyaznikova, Galina Yu. Vitkina, Antonina I. Karlina

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引用次数: 0

Abstract

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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混合碱度铁矿烧结矿的结构与理化性质研究

为了研究烧结矿碱度对烧结矿显微组织、相组成、物理化学和冶金性能的影响，对不同碱度的烧结矿样品进行了烧结研究。对烧结矿的结构、组成、化学和冶金性能进行了全面的研究，并确定了这些性能的最佳值。还介绍了烧结过程中发生的矿物学转变的结果。精矿中所含的磁铁矿在团聚过程中部分溶解于硅酸盐组分和助熔剂中，形成通式为M14O20 (M-Ca, Si, Al, Mg)的复合硅酸盐SFCA，是团聚矿矿相的粘结剂。烧结矿中钙铝硅酸铁的比例取决于烧结矿电荷的碱度，SFCA相的形貌取决于烧结矿的冷却速度。烧结料中CaO含量越多，烧结矿中形成的SFCA相越多，缓慢冷却导致大的片层状和枝晶状SFCA相生长。

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来源期刊

Magnetochemistry Chemistry-Chemistry (miscellaneous)

CiteScore

3.90

自引率

11.10%

发文量

145

审稿时长

11 weeks

期刊介绍： Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.