UN PROCEDIMIENTO PARA PRODUCIR COQUE DE PETROLEO CALCINADO DE ALTA CALIDAD

摘要

A process and apparatus for the production of high quality calcined coke are described. The coke feed (e.g. green coke from a delayed coker) is heated at a bulk temperature of from 650 to 850 DEG C under conditions such that the coke heating rate is no more than 100 DEG C/minute until from 50 to 90 weight percent of the volatile matter content is removed, whereafter the heated coke is calcined at a bulk temperature of from 1350 to 1470 DEG C for at least 10 minutes to produce a relatively hard and non-friable calcined coke. Preferably the calcined coke is produced in a rotary hearth furnace divided by an annular radiation shield into a central high temperature calcining zone and a surrounding devolatilizing zone, the radiation shield defining with the hearth an uninterrupted gap of sufficient width for coke to pass from the devolatilizing zone to the central zone but sufficiently narrow to prevent coke in the devolatilizing zone being substantially affected by heat generated in the central zone.