EIGHT YEARS OF OPERATING EXPERIENCE OF THE WORLD'S LARGEST COKE OVEN BATTERY AT KRUPP NANNESHANN STEELWORKS

摘要

The world's largest coke oven battery at Huetten-werke Krupp Mannesmann has been in operation since December 1984.rnThe battery produces 1.1 million metric tons of coke per year and is comprising 70 high capacity ovens with an effective volume of 70 m (2,472 cu.ft.). Whereas the oven dimensions height (7.85 m - 25.75 ft) and length (18 m -59 ft) had nearly been built before, the chamber width of 550 mm (21.65 ft) was an innovatice technological step.rnThe CONTROLPRESS Bracing System was used to ensure the permanent stability of the refractory brickwork. All machines, including quenching car are one-spot machines. The functions are fully automatic and are controlled from the control room.rnThe rated capacity was reached after only eight weeks. In the following years, the average output was always between 99 and 104 % of rated capacity.rnAlso with regard to meeting stringent environmental regulations, similar success was ach ieved.rnThe good general condition of the battery and machines after eight years operating time at full capacity can largely be attributed to the high degree of preventive maintenance, the regular inspection of the bracing system by Krupp Koppers as well as the good qualification of the coking plant workforce by regular training.rnThe widening of the oven chambers has proven to be the right decision. All difficulties that may result from the increase in oven length and height are compensated by the wider chamber.rnOn the basis of the experience, the wider high capacity ovens can be expected to have the same service life as smaller ovens.