Carbon additive also known as carbon raiser or recarburizer, is a material to molten metal to increase its carbon content. When being used in steelmaking or casting, the fixed carbon of carbon raiser can reach more. It has been widely used in various industries such as metallurgy, chemical, and power.there are many kinds of raw materials and production processes for carbon raisers, including wood-based carbon, coal-based carbon, coke-based carbon, graphite-based carbon, with many sub-categories under each category. High quality carbon raisers generally refer to graphitized carbon additives. As the carbon atoms are arranged in a graphite-like microstructure under high temperature conditions, so it is called as graphitization. Graphitization can reduce the content of impurities in the carbon additive, increase the carbon content, and lower the sulfur content. When being used in casting, carbon raisers can significantly increase the amount of scrap steel used, reduce the amount of pig iron used, or eliminate the need for pig iron.Carbon raisers are generally divided into carbon raisers for steelmaking and carbon raisers for casting. Some other additives also need carbon additives, such as for brake pad additives and being used as friction materials. Carbon raisers are external carbon sources for steelmaking and ironmaking. High quality carbon raisers are essential auxiliary additives for producing high quality steel.