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Why does the steelmaking converter always eat the bottom of the furnace?
This situation is mainly due to the high basicity of slag, low blowing strength and serious erosion of furnace lining.
The basicity of slag is high, and the mgo content in slag reaches or exceeds the saturation value. After tapping, the furnace temperature decreases, some high melting point substances (mgo, c2s, c3s) precipitate, and the slag viscosity increases. When splashing slag, most of the slag stays at the bottom of the furnace and combines with periclase crystals of magnesia-carbon bricks at the bottom of the furnace.
Serious lining erosion or steel slag penetrating the furnace leads to shallow furnace.
Excessive bottom blowing strength leads to the increase of calcium oxide content in slag, which makes slag sticky.
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