Carbonaceous materials Like other carbon composite refractory materials, carbon components play an important role in the resistance to slag erosion and thermal shock resistance of the wrong carbon materials. However, decarburization of carbonaceous materials at high temperatures is inevitable. In addition to the oxidation of carbon in the material, there are two main forms of dissolved decarburization and reactive decarburization under the action of molten steel.
When the carbon in the wrong carbon material is in direct contact with the molten steel, the carbon will dissolve into the molten steel. At the same time, the oxidative error in the material at high temperature reacts with graphite, ceramic fiberboard carbon black, etc. to form a good carbonization error with the wettability of the molten steel, accelerating the molten steel to the material. In the infiltration behavior, molten steel dissolves carbon and forms a decarburized layer.
Another type of decarburization is reaction decarburization. The most important reason for reaction decarburization is that sufficient molten steel and inclusions penetrate into the interior of the material, and carbon and the free particles in the steel react with the oxide to form decarburization.
The purity of the carbonaceous raw material also affects the erosion resistance of the material. If graphite is used as the main carbonaceous material of the wrong carbon material, its ash containing PP flame retardant A12O will partially stabilize the oxidative failure with calcium oxide and magnesium oxide, leading to oxidative misfit to form a monoclinic phase and make the material Due to the large volume expansion, the selection of high purity graphite as a carbonaceous feedstock can reduce the negative impact of the above ash on the stability of partially stable oxidative errors.
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