Moisture Content of Wet-Quenched Coke

Resumo

Analysis of the factors that significantly affect the moisture content of wet-quenched coke provides the basis for measures to stabilize the moisture content at all stages of the process: in the formulation, preparation, and coking of the coal batch and subsequent treatment of the coke. Those measures include the use of batch compositions, preparation techniques, and coking parameters such that uniformly conditioned coke with reasonable levels of porosity and specific surface is produced; uniform intake of coke in the charging car; sprayer configurations in the quenching tower such that the whole coke charge in the charging car is uniformly cooled; appropriate adjustment of the pumps, sprayers, and other equipment in the quenching tower; quenching by means of biochemically treated water without excessive organic pollutants; strict compliance with the quenching conditions (quenching time and residence time of the coke-filled car beneath the quenching tower); uniform distribution of the coke on the ramp; specified holding time of the coke on the ramp since shortening of that time is accompanied by exponential rise in moisture content; systematic identification of incompletely quenched coke on the ramp and its correction by manual quenching on the ramp and automatic quenching during coke transportation for sorting; and the use of air holes in the bunkers holding the blast-furnace coke so as to stabilize its moisture content.