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Information × Registration Number 0222U000682, 0121U110390 , R & D reports Title Development of technical solutions for repair and restoration of elements of constructions of technological equipment of metallurgical enterprises operated in conditions of aggressive environments in high-temperature influences popup.stage_title Head Molchanov Lavr S., Кандидат технічних наук Registration Date 14-01-2022 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description2  At the present stage of development of metallurgical production the question of research and development of complex methods of monitoring and timely detection of problems of constructive elements of technological equipment arises from the influence of aggressive working environment and constant influence of high temperatures is actual and generate the issue to create an innovative low-cost technical decisions on repair and restoration of various structural elements that work in extreme conditions. At this stage, the mechanisms of destruction of periclase-carbon fused refractories used in oxygen converters and other metallurgical equipment were studied. The mechanisms of destruction that are different for different parts of the lining, due to the different nature of the physico-chemical effects of the environment that the refractory comes into contact were confirmed. According to the macro-pictures of the destruction of refractories, it was established that the most aggressive is the influence of metallurgical slags, which causes the formation of a decarburized transition zone in the volume of refractory. Accordingly, the contact of the carbon bond with the periclase grains deteriorates and structural destruction is observed. This is expressed in the formation of cracks and cavities that cause the destruction of refractory material at the boundary of the contract with the slag melt. Given the physicochemical structure of periclase-carbon refractory (presents of carbon binder), the electrical resistance of the investigated area of refractory material was chosen as a parameter to determine the depth of destruction. The change of periclase-carbon resistance of refractories depending on temperature wais investigated and analytical expressions for recalculation of level of electric resistance of the investigated site on change of its profile were developed. Product Description popup.authors Holub Tetiana S. Molchanov Lavr S. Semikina Hanna А. Chernyatevich Anatolii H. popup.nrat_date 2022-03-09 Close