Geometrical-Topological Characteristics of the Subsolidus Structure in the Mgo – Feo – Tio2 System

Borysenko, Oksana; Logvinkov, S. M.; Shabanova, G. N.; Ostapenko, I. A.

doi:10.32838/2663-5941/2021.1-2/08

Scientific notes of Taurida National V.I. Vernadsky University.

2021

DOI: 10.32838/2663-5941/2021.1-2/08

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Geometrical-Topological Characteristics of the Subsolidus Structure in the Mgo – Feo – Tio2 System

Oksana Borysenko¹,

S. M. Logvinkov²,

G. N. Shabanova³

et al.

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Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Borysenko¹,

Logvinkov²,

Shabanova³

et al. 2022

ChChT

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The subsolidus structure of the four-component system MgO – Al2O3 – FeO – TiO2 was studied in six temperature ranges. Geometric-topological characteristics of the phases of the system under study have been determined, topological graphs of the relationship of elementary tetrahedrons have been constructed, their volumes, degrees of asymmetry for all temperature ranges have been found. The optimal regions of compositions for the production of spinel-containing materials have been predicted, which are within the limits of elementary tetrahedra: MgO – FeO – Mg2TiO4 – MgAl2O4, FeAl2O4 – Mg2TiO4 – FeO – Fe2TiO4, FeAl2O4 – Mg2TiO4 – MgAl2O4 – FeO and FeAl2O4 – MgTiO3 – MgAl2O4 – Al2O3.

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Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Borysenko¹,

Logvinkov²,

Shabanova³

et al. 2022

ChChT

View full text Add to dashboard Cite

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Calculations and analysis of eutectics temperatures and compositions of multi-component sections of the MgO—Al2O3—FeO—TiO2 system

Borysenko

Logvinkov

Shabanova

et al. 2021

SRRTC

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Thermal insulation and safety of cement rotary kilns is ensured by the use of modern and reliable refractory materials with a set of specified performance characteristics. The MgO—Al2O3—FeO—ТіО2 system is a physicochemical basis for the development of compositions of periclase-spinel refractories for lining rotary kilns of cement production. Since periclase-spinel refractories obtained on the basis of the MgO— Al2O3—FeO—ТіО2 system are operated at elevated temperatures, in this article, the calculations of temperatures and compositions of eutectics of binary, triple and quadruple sections of the system are carried out in order to predict the appearance of a melt in the corresponding materials, and to develop technological solutions for a rational amount of melt during sintering and as a seed for a set of coatings. Analysis of temperatures and compositions of eutectics of multicomponent sections MgO—FeO—Mg2TiO4—MgAl2O4, FeAl2O4—Mg2TiO4—FeO—Fe2TiO4, FeAl2O4—Mg2TiO4—MgAl2O4—FeO and FeAl2O4—MgTiO3—MgAl2O4—Al2O3 systems MgO—Al2O3—FeO—ТіО2 confirms the possibility of synthesis of periclase-spinel refractories with high performance in this system and provides the necessary technological information for targeted control of the relationship “composition—structure—properties” during their production.

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Special features of the structure of modifier of periclasespinel materials with an increased thermal shock resistance

Borysenko,

Logvinkov,

Shabanova

et al. 2023

SRRTC

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The main requirement for periclasespinel refractories during their operation is the ability to multiple thermal cycling, which can lead to thermal absorption of stress in the refractory system. Therefore, resistance to thermal shocks is considered one of the key properties of the material for extending the service life of linings based on them. The structure of the modifier, which is included in the composition of periclase spinel materials, was investigated using Xray phase and electron microscopic studies, and the influence of its structural features on the performance characteristics of the refractory was substantiated. The structural and phase features of the modifier were revealed, namely, polyphasic and the presence of metastable phases in the composition of the material, which is due to the presence of impurities and their easy ability to form orthosilicates and crystallize during cooling of the fired sample of the modifier, as well as the oxidizing gaseous firing medium due to the partial transition FeO → Fe2O3 with the formation of a pseudobrookite phase and magnesium ferrite, have a positive effect on the heat resistance of the modified periclase spinel material due to the branching of thermodynamic paths of structural and phase changes in the composition of the refractory in the heating—cooling cycles.

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Geometrical-Topological Characteristics of the Subsolidus Structure in the Mgo – Feo – Tio2 System

Cited by 3 publications

References 0 publications

Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Calculations and analysis of eutectics temperatures and compositions of multi-component sections of the MgO—Al2O3—FeO—TiO2 system

Special features of the structure of modifier of periclasespinel materials with an increased thermal shock resistance

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Geometrical-Topological Characteristics of the Subsolidus Structure in the Mgo – Feo – Tio2 System

Cited by 3 publications

References 0 publications

Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Subsolidus Structure of the MgO – Al2O3 – FeO – TiO2 system

Calculations and analysis of eutectics temperatures and compositions of multi-component sections of the MgO—Al2O3—FeO—TiO2 system

Special features of the structure of modifier of periclase­spinel materials with an increased thermal shock resistance

Contact Info

Product

Resources

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Special features of the structure of modifier of periclasespinel materials with an increased thermal shock resistance