Method of use of carburizer

In the process of smelting steel, because of the improper operation of the ingredients or charging will cause decarbonization too, sometimes it will cause the content of carbon in steel does not meet the requirements, at this time it is necessary to increase the carbon in the liquid steel, so the commonly used carburizer has pig iron and petroleum coke powder and charcoal powder and other raw materials.  

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Converter smelting medium and high carbon steel, the use of petroleum coke containing few impurities as carburizer.  The requirement of recarburizer for top blown converter steelmaking is high fixed carbon, low ash, volatile matter, sulfur, phosphorus, nitrogen and other impurities, and dry, clean, moderate particle size.  If the particle size is too fine, it is easy to burn. If the particle size is too coarse, it will float on the surface of molten steel and not be easily absorbed by molten steel.  Carburizer is suitable for smelting in induction furnace, but the specific use is not the same according to the process requirements.  In the medium frequency electric furnace smelting using carburizer, according to the ratio or carbon equivalent requirements with the material added to the furnace in the lower part, the recovery rate can reach more than 95%;  

If the lack of carbon adjustment, the first play net furnace slag, plus carburant, by raising the temperature of molten iron, or artificial electromagnetic stirring to dissolve carbon absorption, recovery rate is around 90%, if the low-temperature carbonization process, namely melt furnace charge only a part of molten iron liquid under the condition of low temperature, all recarburizer one-time in liquid iron,  At the same time, it is pressed into liquid iron with solid charge so as not to expose the surface of liquid iron.  The carburization of liquid iron can reach more than 1.0%.