In the process of smelting,due to improper proportioning or charging and excessive decarbonization,sometimes the carbon content in steel does not meet the peak requirement,at this time,carburizing is needed to the molten steel.
Commonly used carburizing additive are carburizing pig iron,electrode powder,petroleum coke powder,charcoal powder and coke powder.Petroleum coke with few impurities is used as carburizing additive in converter smelting medium and high carbon steel.The requirement for top-blown converter carburizer is high fixed carbon, low ash,volatile matter and impurities such as sulfur, phosphorus and nitrogen,and dry, clean and moderate particle size.
