Influence of coking parameters on the quality of tar for electrode-pitch production

Changes in the raw materials employed and the coking conditions affect the quality of the tar byproducts used in the production of electrode pitch. The decline in tar quality associated with faster pyrolysis of the vapor-gas products within the coking chamber is discussed. The factors affecting the properties of the newly formed coal tar are analyzed, and the results are compared with theoretical concepts regarding the transformation of the primary products of pyrolysis in the coking chamber. Practical recommendations are developed regarding the production of higher-quality tar. Systematic monitoring of the volume and temperature of the free space within the chamber permits improvement in tar quality, despite increasing coking rates in the production of higher-quality coke. With a tar density of 1185–1190 kg/m3, the moisture content falls to 2.0–5.5%, and the ash content to 0.08–0.11%.