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The service results of submerged-resistor induction furnaces for pig iron exposure of the vertical (capacity 30 tons) and horizontal (capacity 60 tons) types at the AMO ZIL Works are described. The furnace lining is made of KSVKh-1 corundum mixture by casting. The lining is found to be reliable in service, and its resistance is more than two times higher than that of mixture MK-90.Three submerged-resistor induction furnaces function at the AMO ZIL Works. Two of them are drum-type (horizontal) of capacity 60 tons (equipped with two induction heaters of 1100 kW each) and one vertical-type furnace of capacity 30 tons, which is also equipped with two induction heaters of 850 kW each. Previously, the working layer of the vertical furnace lining was made of mixture MK-90 and its resistance was not more than one year. The working layer lining of the drum-type furnace was made of dense corundum products, including profiled blocks. The corundum lining in these mixers did not, as a rule, last more than a year and a half [1].Starting in 2001, the AMO ZIL successfully used the KSVKh-1 dry vibropressed corundum mixture with an chromium oxide additive (TU 1523-007-00187085-2001) produced by the REIN company and the DINUR JSC [2] as lining in vertical submerged-resistor induction furnaces. Unlike other companies, in particular, the AvroVAZ Works, which makes lining elements lining from KBSKh-1 mixture using the dry and semidry variants, the AMO ZIL from the beginning decided to produce lining using the "concrete" method, i.e. by casting, despite the fact that the mixture does not contain hydraulic binder (cement). The studies performed during the development of this series of mixtures have established that they have thixotropic properties. After 5 -6 wt.% water is added, the mixture becomes fluid, which makes it possible to produce complex-shaped lining in large masses using depth vibrators. Laboratory studies indicate that this method increases 2 -3 times the heat resistance of this mixture (1300°C -water) compared to the heat resistance of the samples made of the dry ramming mixture.

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