In the smelting process of iron and steel products, factors such as long smelting time, holding time, and overheating time often increase the smelting loss of carbon elements in the molten iron, resulting in a decrease in the carbon content in the molten iron, which fails to reach the expected theoretical value for refining. The carbon-containing substances added to make up for the carbon loss during the iron and steel smelting process are called carburizers.