What is a carburizer Carburizing agent is the product of increasing carbon (c). In the process of steelmaking, due to various factors, the carbon content in molten steel decreases, which affects the quality of finished steel. Therefore, steel mills often buy carburizing agent in order to deal with the carbon decline in steelmaking. There are many common types of carburizers, including graphite carburizers, petroleum coke carburizers and casting carburizers, which are mainly used in steel-making and casting industries.http://www.ayzirconia.com/converter-refractory/slag-stopping-ball/slag-ball.html