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The first coke pushing on Coke Oven #1 took place in July 1956 and then Coke Oven #2 was taken over in 1960, each consisting of 55 pieces of chambers with the capacity of 20 m3. Coke Oven #1 was reconstructed in 1985 and is in operation also currently, Coke Oven #2 was stopped in 1987. Coke Oven #3, which consists of 65 pieces of chambers with the capacity of 41.6 m3, was started in 1986 and totally reconstructed in 2006. Coking Blocks are heated by purified coke oven gas, the temperature adequate for the gasification time has to be provided by burning it.
Crude coke oven gas produced during coking is cleaned, one part of it is recycled to the heating of the oven block, and the rest is forwarded to the plants of DUNAFERR Company Group. Besides these products coal tar processing and coke oven benzole production are significant, which are produced during the cleaning of coke oven gas. These products are sold on foreign markets.
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Coking coal bought only from abroad since February 1993 is forwarded by a conveyor system from the wagon-tipping device to the bunkers of the closed coal depot or to the open coal storage area, from where the component coals with different qualities are forwarded to the bunkers of the charging bunker line. The composition of coking charge is determined on the basis of the quality of coals. The coals are broken in fine breaking equipments to ensure the suitable granulometric composition. Then coking coal charge is forwarded on a conveyor to the coal tower belonging to the Coke Oven Plant.
The charge stored in the coal tower is charged into the cone of the coal charging car, and the charging car transports it to the empty chamber, and then charges it into the chamber during continuous levelling. The heating walls of the chamber are kept on the temperature of 1150-1350oC. Coal charge fuses in the space closed from air as an effect of continuous warming-up, and then it concretes to coke with the volatile matters exhausting. Then the pushing machine pushes the gleed through the shield car into the coke-quenching car, as well as into the container. The coke produced on Coking Block #1 is cooled down with high efficiency spraying by water below the quenching tower, then it is forwarded from the ramp to the Coke Screening Plant No. I by a conveyor. The coke produced on Coking Block #3 is charged into the 5 pieces of quenching chambers of the dry quenching equipment, where it is cooled by inactive gas to 100-150oC, and then it is forwarded to the Coke Screening Plant #2. Here furnace-size coke is separated by coke screens, which is forwarded to the blast furnace by a conveyor. Fine coke is separated into fractions, stored in bunkers, and then transported in railway wagons on the one hand to domestic, on the other hand to export markets. Dry blast furnace coke of good quality from Coking Block #3 is used only within the company group.