Carburizing agent is more and more popular now, mainly because of its low price, good quality and wide application. At present, there are a variety of carburizing agents in the ferroalloy market. Therefore, as a purchasing manufacturer, it is necessary to know what elements are contained in the carburizing agent so as to better select the appropriate carburizing agent products and make better use of the carburizing agent.
In the smelting process, due to improper materials or preparation, excessive decarburization and other reasons, the carbon content of the steel sometimes cannot meet the requirements of the normal standard, so it is necessary to add carbon to the steel. Commonly used carburizing agents include carburized pig iron, electrode powder, petroleum charcoal powder, charcoal powder and coke powder. When smelting medium and high carbon steel in converter, petroleum coke carburizing agent with less impurities is used. The requirements of carburizing agent for top blowing steelmaking are high fixed carbon, low ash, volatile, sulfur, phosphorus, nitrogen and other impurities, dry, clean and moderate particle size.
The particle size is too fine, easy to burn, too coarse, floating on the surface of precipitation, and difficult to be absorbed by precipitation. High carbon steel needs low nitrogen and the particle size is 0.5-5mm. It needs to be judged and selected according to the specific conditions of the specific furnace type smelting workpiece.