... ,RoHs 4,Low N low Sulphur Calcined petroleum coke Specifications 20 Years of Experience on calcined petroleum coke Professional Manufacturer Low N low Sulphur ... like Japan, Korea, India, USA, Italy, Indonesia etc.Duratight Calcined Petroleum Coke has the features of high carbon,low sulphur,nitrogen and ... Ton Bag High Absorption Rate Low N low Sulphur Calcined petroleum coke