Abstract: A delayed coking unit, using low-sulfur vacuum residue derived from low-metal, low-sulfur, and sulfur-containing crude oils together with fluid catalytic cracking (FCC) slurry oil as feedstocks, can stably produce prebaked anode-grade petroleum coke and negative electrode coke that meet downstream users' requirements by adjusting operating parameters such as the coke drum coking cycle and the heater outlet temperature.During the production of negative electrode coke, a low-sulfur crude oil of an intermediate base with a paraffinic tendency, characterized by low nickel and vanadium contents, is selected, such that the resulting vacuum residue has a saturates mass fraction below 20%, an aromatics mass fraction above 40%, and an asphaltenes mass fraction below 5%. In the delayed coking unit, an appropriate amount of FCC slurry oil is blended into the feed, the heater outlet temperature is controlled at approximately 495 ℃, and the coke drum coking cycle is set to 24 h.

Key words: petroleum coke, carbon material, anode-grade coke, delayed coking