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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 01
SUMMARY:Challenges during the installation and commissioning of the ZKS coke oven pilot plant
DESCRIPTION:Since the coal market is very volatile and fast-moving, not only since the beginning of the energy crisis, rapid testing of alternatives for the coal blend of the Zentralkokerei Saar (ZKS) is indispensable. In this context, the most important tasks of a coke oven pilot facility are to investigate the effect of a test coal on the coke quality and the resulting wall pressure during the carbonisation. The latter parameter is of particular importance for the ZKS, as it is a coking plant using stamp charging operation with correspondingly increased wall pressures. For these reasons, the new ZKS coke oven pilot plant was built nearby the coke oven batteries in 2019.
The optimization of the operating parameters took more time as expected. Especially the adjustment of the required coal cake density with a good homogeneity and the wall pressure measurement caused problems. By systematic modifications of  the stamping program and the stamping machine, a satisfying density of 1020 - 1030 kg/m3 (dry) and homogeneity could be achieved. The homogeneity of the coal cake was investigated and quantified by core drilling and measurement of the individual layers. 
During the adjustment of the wall pressure measurement, a strong dependence on the ambient temperature was noticed, which initially amounted to almost 1 kN per °C temperature change. Through structural and procedural adjustments (stiffening of the mounting of the load cell, heating of oven walls, insulation of the wall pressure measurement), the temperature dependence could be reduced to 0.2 - 0.3 kN/°C. Nevertheless, the wall pressure results of the coking tests have to be corrected by a temperature correction function to minimize the error due to the temperature dependence.

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DTSTART:20230615T092000
DTEND:20230615T094000
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