Pak mezofazowy jako stadium pośrednie w technologii otrzymywania koksu elektrodowego

Electrode cokes is routinally produced by delayed coking of carefully chosen petroleum or coal tar derived feedstocks. The process has its advantages and disadvantages, and to avoid some of its difficulties another ways of transforming liquid pitches into hard cokes are still under investigation. We tried to obtain a highly anisotropic coke, with good graphitizability, by chamber coking of a mesophase pitch. This material was obtained from the model plant for continuous thermal treatment of light tar pitches, and typically contained about 50% of mesophase. Mesophase pitch was carbonized in the semi-technical chamber coking plant at 550 degrees Centigrade. The obtained coke was investigated for its suitability for the electrode industry. The procedure simulates the typical way of manufacturing graphite electrodes, using as a feedstock the "mesophase coke" and a standard petroleum coke. It appeared that the "mesophase coke" gave graphitized product showing properties comparable with that obtained from commercial Texas petroleum coke.