The article analyzes samples of chamotte refractory after service in the shaft and in the crucible of a coke gas cupola furnace during melting of cast iron with spheroidal graphite using carbon waste from the electrolysis production of aluminum as a reducing agent. It was established that the products acquire a pronounced zonal nature in service. After service in a shaft, products have a complex compaction property associated with the depth of penetration of volatile components of the charge. After service in the crucible of a coke gas cupola furnace, refractories contain a melted crust of the working zone formed in contact with the cast iron melt; working zone formed as a result of impregnation of cast iron and/or slag with melt; the least changed transition and impregnated (weakly metamorphosed) zones which structure differs little from the structure of the original refractory.
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Translated from Novye Ogneupory, No. 9, pp. 3 – 8, September, 2021.
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Isagulov, A.Z., Kashcheev, I.D., Sidorina, E.A. et al. Behavior of the Fireclay Lining of a Coke Gas Cupola Furnace When Melting Cast Iron Using Anode Scrappage in Electrolysis Production. Part 1. Refract Ind Ceram 62, 492–496 (2022). https://doi.org/10.1007/s11148-022-00632-w
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DOI: https://doi.org/10.1007/s11148-022-00632-w