METHOD FOR PRODUCING OIL COKE WITH IMPROVED MICROSTRUCTURE ON THE BASIS OF SHALE OIL

摘要

The invention is provided for producing oil coke on the basis of oil shale. The oil coke is of improved quality having the microstructure similar to the microstructure of needle coke. As raw material a heavy fraction of shale oil with boiling point from 320 °C extracted from the residual product with boiling point from 350 °C of the atmospheric distillation of shale oil in the process of coking is used. The raw material is inserted into the coke cube and after that boiled, whereas during the whole boiling stage the temperature of raw material is continuously increased. Starting from the emerging of the coke bulk the temperature of the cube is increased to 720-760 °C and kept on this level until the end of the heating of oil coke. After that oil coke is annealed. The vaporised fractions emerged are processed and re-utilized.