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Steel Making
Название Structure and properties of detonation coatings Al2O3 and MgAl2O4 on refractory materials for lining of steelmaking vessels
DOI 10.17580/cisisr.2025.01.07
Автор S. V. Zaitsev, V. V. Strokova, V. V. Sirota, D. O. Bondarenko
Информация об авторе

Belgorod State Technological University named after V. G. Shukhov (Belgorod, Russia)

S. V. Zaitsev, Research Engineer, Center of High Technologies, e-mail: sergey-za@mail.ru
V. V. Strokova, Dr. Eng., Prof., Head of Dept. of Material Science and Materials Technology, e-mail: s-nsm@mail.ru
V. V. Sirota, Cand. Phys.-Math.,Director of the Center of High Technologies, e-mail: zmas36@mail.ru
D. O. Bondarenko, Cand. Eng., Associate Prof., Dept. of Material Science and Materials Technology, e-mail: di_bondarenko@mail.ru

Реферат

It is very important to provide output of high-quality metallurgical products with minimal production expenses. In this field, iron and steel production occupies about 70 % of total volume of manufactured refractories. In this case, equipping of steelmaking vessels with high-quality lining is considered as one of the key goals, while this lining ensures stable and safe iron and steel production even at the extra high temperatures. Alumosilicate refractories are widely used in the metallurgical industry; however, their operation in aggressive conditions is accompanied by corrosion and erosion, what decreases substantially the service life of high-temperature steelmaking vessels. To solve this problem, development of protective coatings, which are able to restrict interaction of operating media with material surface and to rise its corrosion resistance, is required. This research examines possibility of using the method of detonation spraying with applying of a multi-chamber cumulative-detonation unit for creation of protective coatings presented by aluminium oxide (Al2O3) and magnesium aluminate spinel (MgAl2O4) for alumosilicate refractories. The conducted investigations were aimed on evaluation of structure and properties of detonation coatings; they displayed that dense coatings of corundum and spinel with lamellar structure are forming on the surface of high-alumina refractories. Such coatings decrease refractory surface roughness by 45 % and are characterized by average thickness ~300 μm, porosity < 3.25 % and microhardness ~1300 HV03. The results of this research confirm prospectivity of applying the detonation spraying technology for refractory materials as a possible method for lining protection of steelmaking vessels.
The research was carried out within the framework of realization of the state assignment of the Ministry of Science and Education and Science of Russian Federation No. FZWN-2023-0006 with use of equipment of the Center of high technologies in the Belgorod State Technological University named after V. G. Shukhov.

Ключевые слова Alumosilicate refractories, Al2O3 coatings, MgAl2O4 coatings, detonation spraying, structure, microhardness, lining, steelmaking vessels
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Полный текст статьи Structure and properties of detonation coatings Al2O3 and MgAl2O4 on refractory materials for lining of steelmaking vessels
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