FOUNDRY COAL COKE - intended for use in cupolas. Depending on the content of S (%), сoal coke is divided into grades: CL-1 - 0,45; CL-2 - 0,8; CL-3 - 1,2. Ash content of coke of all grades – 12%, moisture content – less than 5%, volatile yield – less than 1,2%, porosity –up tp 42%.