The Uses Of Carbon Additive

During the smelting process, due to improper batching or charging and excessive decarburization, the carbon content in the steel sometimes does not meet the requirements of the top stage. At this time, carbon should be added to the molten steel.

Commonly used carbon additive include carburized pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder. When smelting medium and high carbon steels in a converter, petroleum coke with very few impurities is used as a carbon additive. The requirements for carbon additives used in top-blown converter steelmaking are high fixed carbon, low ash, volatile matter and impurities such as sulfur, phosphorus and nitrogen, and dry, clean and moderate particle size.