Coke causes up to 50% of the costs during the pig iron production.
The cost effective production of high quality coke is thus of prime importance for the competitive ability of the iron producing industry.
The stamp charging technology offers a considerable potential for reducing costs during the coke production: It enables the economical production of high- and constant quality coke, also from high volatile and low-quality coal.
Even petrol coke and coke dust can be utilized.
During the stamp charging process, the coal is stamped outside the coke oven, into a single „briquette“ (coal cake), having almost the same dimensions as the oven chamber. This coal cake reaches a density of up to 1.15 t/m³ (on wet coal basis with 10% water) – about 30% more than with the loose coal-charge during conventional top charging systems.