Use of carburizing agents
In the smelting process, due to improper ingredients or improper loading and excessive decarburization, the carbon content in the steel sometimes does not meet the requirements of the top stage. The commonly used carburizing agents include carburized pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder. When smelting medium and high carbon steel in converter, the oil containing little impurity is used, and Jiaozuo is used as carburizing agent. For BOF steelmaking using recarburizer requirement is high to low fixed carbon, ash, volatile matter and sulfur, phosphorus, nitrogen and other impurities, and dry, clean, moderate size.
Recarburizer steelmaking using recarburizer (People's Republic of China ferrous metallurgy industry standards, YB/T 192-2001 steel with increased carbon agent) and cast iron using recarburizer, and add some other materials are useful to the carburant, such as brake pads additive for friction materials. The carburizing agent belongs to the raw material of additional steelmaking and ironmaking. High quality carburizing agent is an indispensable additive for the production of high quality steel.
The particle size is too fine, easy to burn, too coarse, float on the surface of liquid steel after adding, and it is not easy to be absorbed by steel. The particle size of 0.2-6mm in the induction furnace, the steel and other ferrous metal particles in 1.4-9.5mm high carbon steel, low nitrogen, particle size in 0.5-5mm, and according to the specific needs of the furnace smelting specific types of workpiece so the details of specific judgment and selection.
