The effect of introducing antioxidant CaB6-SiC on the properties of ASC castable
Hot metal runner castable is an important component of refractory materials used in BF ironmaking.Currently,an important indicator that affects the service life of the hot metal runner castable is its oxidation resistance.Once the castable is oxidized,not only will its internal carbon source lose its original corrosion resistance,but more pores will be produced,leading to a significant decrease in material density and strength.In order to improve the oxidation resistance of the hot metal runner castable,the effect of a new antioxidant CaB6-SiC on the oxidation resistance and other properties of the castable is tested.The results showed that with the increase of the introduction of antioxidant CaB6-SiC,the antioxidant performance(thickness characterization of the decarburized layer)of the sample is significantly enhanced,and the room temperature strength gradually decreases.After medium and high temperature treatment,the strength indicator first increases and then decreases,the linear change rate gradually increases,and the high-temperature rupture strength first increases and then decreases.When the introduction of antioxidant CaB6-SiC reaches 1%,the castable sample reaches the best comprehensive index.
Hot metal runner castableAntioxidantDecarburized layerLinear change rateHigh-temperature rupture strength
NETL
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