Abstract
The German Social Accident Insurance has been studying dust samples from trade and industry for many years with regard to their explosion indices, and makes these data available free of charge and accessible from around the globe in the GESTIS-DUST-Ex database. The dusts studied vary widely in their chemical composition and particle size distribution. The substantial data collective nevertheless permits study of the possible relationships between the various safety indices. The focus of this study lies upon the influence of the median upon the maximum explosion pressure Pmax and the rate of pressure rise dp/dt. The median reduces a complete particle size distribution to a single value and is therefore an imprecise measure of the active surface of the dusts. For this reason, precise BET surface analyses of 129 dusts were performed in a further study in order to determine possible correlations between Pmax and Kst. In addition, the heat of combustion of these dusts was determined calorimetrically in order for further information on the explosion reaction and the Kst value to be obtained.
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