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High sulfur petroleum cokes were calcined in a high temperature furnace to reduce the sulfur content 9 during the prebaked anode production, and that can be good for reducing environment pollution. The preparation test and performance analysis of anodes were carried out. The ways of injecting the desulfurized coke and its influence on quality of the anode are discussed. The results show that although the high temperature treatment greatly reduces the sulfur content of the high-sulfur petroleum coke, it has a negative effect on the microstructure and properties of the anode, and the desulfurized coke cannot be used to product anode in large quantities. A certain proportion of the desulfurized coke can be used with little effect on the anode properties. The present work can provide a reference for the application of high temperature desulfurized petroleum coke in anode production.

Petroleum cokes with different sulfur contents were calcined in a graphitization furnace, and the properties of the calcined cokes, such as real density, sulfur content, carbon lattice and so on, were analyzed. The results show that above 1200 °C, with the increase of calcination temperature, the main factors influencing the desulfurization mechanism, sulfur completely discharge temperature, porosity and the growth rate of the carbon lattice are the thiophene sulfur content and the sulfur side chain hydrocarbon bond proportion difference in petroleum cokes. The higher the sulfur content and the less the thiophene content, the lower the sulfur completely discharging temperature and the slower the growth of the coke lattice.

Three different types of petroleum cokes were studied in the temperature range between 700 and 1100 °C in a laboratory calciner. The properties of the calcined cokes, such as the real density, powder resistivity, Lc value, porosity and so on, were analyzed by SEM, TG, DTG and so on. It was found that the TG and DTG curves of low sulfur, medium sulfur and high sulfur petroleum cokes are quite different. The performance of the calcined coke, the desulfurization rate, the growth of carbon crystal and the porosity have obvious difference with the increase of calcining temperature. These findings can be used as the guidelines for the prebake anode production using these types of petroleum cokes.