... to customers' use experience, FSK Carbon additive has gained the features of high carbon, low sulfur, low nitrogen and ... less impurities. FSK carbon additive can be used ... steel,we recommend DT-CA-10 for you, Fixed carbon(max):95%,sulfur(max):0.3%2/ for low ... packing, pls contact with us freely. Carburant used calcined petroleum coke/CPC