Features of mineral formation in the structure of iron ore materials from the position of the state diagram of the system CaO–Fe2O3–SiO2

Авторы:

А. Zhunusova (Соавтор)

P. Bykov (Соавтор)

А. Zhunusov (Соавтор)

O. Zayakin (Соавтор)

A. Bakirov (Соавтор)

A. Kenzhebekova (Соавтор)

Издательство:

КН МНВО РК

Дата издания

30.06.2025

Область исследования

Инжиниринг и технологии

Тип исследования

Фундаментальное

Аннотация (краткое описание)

This paper presents the results of a study of the strengthening of iron ore raw materials obtained by oxidative roasting of granules and pellets using gaseous fuel and agglomeration with combustion of solid fuel in the agglomeration layer. Differences in the mechanisms of mineral formation of granules, pellets and agglomeratesappear at the stage of liquid-phase strengthening and are due to the different role of iron in formingthe strengthening melt. At the same time, in the agglomerate, granules and pellets, iron is in different valence states, affecting the processes' features. Iron can be in a trivalent state in the iron-silicate melt of granules and pelletsand is not a silicate-forming component of the charge. The silicate compositions of the binders in the entire studied range of basicities (0.3-1.5) are located along the line of the CaO–SiO2connection, which is de-termined using the phase diagram of the CaO–Fe2O3–SiO2system. During agglomeration, the silicon-containing melt is formed under conditions of excess FeO, which directs the process of mineral formation during the creation of the iron-silicate binder of the agglomerate. Under standard agglomeration conditions, silicate binders with a basicity of 1.0-1.5 are formed in the olivine field of the CaO–FeO–SiO2phase diagram, covering a wide range of compositions. The processes of mineral for-mation in batches, by hardened methods, both during the firing of granules, pellets, and during agglomeration, have shown that changing the oxidation potential of the gas phase is an effective lever on the path not only to improving the properties of fer-rous sand -a waste product of alumina production, but also to creating both new binders and new types of iron ore raw materi-als suitable for smelting ferrosilicon.

Соответствие целям устойчивого развития (ЦУР)

URI

https://vestnik.satbayev.university/index.php/journal/article/view/1484/708

DOI

https://doi.org/10.51301/ejsu.2025.i3.03

Тип публикаций

Статья

Данный документ располагается в коллекциях

Научные издания SU

Engineering Journal of Satbayev University

Файлы документа

Features of mineral formation in the structure of iron ore materials from the position of the state diagram of the system CaO–Fe2O3–SiO2.pdf