7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

The cooking process in a Heat Recovery Coke Plant is founded on the burn of volatile matter, present on coal as primary fuel. A second unwanted reaction occurs by the combustion of coke. This undesired burning process is called Burn Loss. The amount of air sucked to the oven was controlled by an automatic system which open or close the valves using as main variable Time. During the control by...

The amount and type of different mineral species in coke oven feed coal, the size of these mineral grains and their association with fusible and infusible macerals can have a significant impact on coke quality. The Coal Grain Analysis (CGA) system is an optical reflected light microscope imaging system that collects mosaics of contiguous high resolution colour images to provide detailed...

Coke cold strength is typically measured using standardised coke strength indices (ASTM, IRSID and JIS). When all coke cold strength tests are performed at full scale, collective weight of 45 kg of product coke is required.However, pilot or research at bench scale cokingmay not result in sufficient coke yield for standardised testing. In these cases, an I600 test, which is equivalent to...

Coke plant operators follow numerous coal blending criteria in order to satisfy quality, operational and financial targets of coke production. To meet such specifications the portfolio of coals in use shall not only include prime coking coals but also coals which play an important role in blend performance and cost optimization process. Selection of coals for industrial coke making...

A new German law, regulating the workers stress by Polycyclic Aromatic Hydrocarbons (PAH), was published in summer 2015. This article will outline the medical considerations that lead to this new regulation in overall and for cokemaking in detail. The author was involved in the working group preparing the new regulations representing the interests of domestic cokemaking industry. All...

The requirements concerning the coke quality for the blast furnaces of voestalpine increased steadily in the past few years. To achieve this improved coke quality, on the one hand side the raw material base had to be changed and on the other hand side the coal pre-treatment and the blend preparation had to be enhanced. Originally the coal preparation plant at the coke oven plant voestalpine...

Bulk density in coal blends is often associated with moisture content. However, moisture is not the only factor affecting charge density. Investigations of single coal and blend crushing and screening, with crushing of oversize only, have demonstrated that the crushing regime affects coal particle size distribution. Oven charge density also benefits from oil addition to coal blends, with some...