Petroleum coke with low sulfur content can be used as a raw material for making electrodes in smelters. Carbon plants use petroleum coke to produce anode paste for aluminum plants and graphite electrodes for steel plants. The sulfur content of petroleum coke affects the use of coke and the quality of carbon products made from coke.
Especially in the manufacture of graphite electrodes, the sulfur content is an important indicator. Excessive sulfur content will directly affect the quality of graphite electrodes and also affect the quality of steelmaking.
At a high temperature above 500°C, the sulfur in the graphite electrode will be decomposed, and too much sulfur will expand the electrode crystal, causing the electrode to shrink and cracks, which can cause the electrode to be scrapped. In the production of graphite electrodes, the sulfur content of petroleum coke will affect the electricity consumption. The electricity consumption per ton of petroleum coke with 1.0% sulfur content is higher than that of petroleum coke with 0.5% sulfur content per ton 9 %about. When petroleum coke is used as a raw material for anode paste, its sulfur content also has a significant impact on power consumption.