The article is devoted to the study of the dependence of the change in compressive strength on temperature for refractory materials of the lining of a pouring ladle of ferroalloy production – fireclay bricks of the ShKU type. The thermographic analysis of the outer surface of the ladle and the condition of the inner surface of the lining showed that the main cause of cracking can be considered thermal stresses arising from significant temperature differences across the lining section during non-stationary thermal processes. The determining influence of thermal stresses on the destruction of the lining is confirmed by a visual examination of samples of refractory materials from the masonry. The experimental part contains a study of the dependence of the compressive strength on the temperature of new spent samples of refractories. Studies have shown that with increasing temperature, the value of the compressive strength increases in a certain temperature range. Thus, the maximum value of the ultimate compressive strength for new fireclay refractories is 44 % higher, and for partially exhausted refractories it is 56 % higher than the ultimate strength at a temperature of 20 ?C.
Nazgul M. Aripova – PhD, Associate Professor of the Department “Heat power engineering”, Non-Profit Limited Company “Toraighyrov University” (NPLC “Toraighyrov University”), Pavlodar, Kazakhstan
Alexander S. Nikiforov – Doctor of Technical Sciences, Professor of the Department of Thermal Power Engineering, Non-Profit Limited Company “Toraighyrov University” (NPLC “Toraighyrov University”), Pavlodar, Kazakhstan
Alexander M. Paramonov – Doctor of Technical Sciences, Professor of the Department of Thermal Power Engineering, Federal State Autonomous Educational Institution of Higher Education “Omsk State Technical University” (OmSTU), Omsk, Russia
Evgeniy V. Prikhodko – Candidate of Technical Sciences, Professor, Professor of the Department of Thermal Power Engineering, Non-Profit Limited Company “Toraighyrov University” (NPLC “Toraighyrov University”), Pavlodar, Kazakhstan
Akmaral K. Kinzhibekova – Candidate of Technical Sciences, Associate Professor, Professor of the Department of Thermal Power Engineering, Non-Profit Limited Company “Toraighyrov University” (NPLC “Toraighyrov University”), Pavlodar, Kazakhstan
Amangeldy E. Karmanov – PhD, Associate Professor, head of the Department of Thermal Power Engineering, Non-Profit Limited Company “Toraighyrov University” (NPLC “Toraighyrov University”), Pavlodar, Kazakhstan
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DOI: 10.14489/glc.2025.10.pp.039-047
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