Carbon raiser is a big category that includes calcined petroleum coke, graphite petroleum coke, calcined anthracite, and natural graphite. it is not suitable for steelmaking or casting, so calcined petroleum coke, graphite petroleum coke, and calcined coal are more suitable for the current steelmaking and casting process.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.