Correlation of pmax and KSt to specific surface area and calorific value of a dust |
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| Institution: | 1. Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), Alte Heerstrasse 111, 53757 Sankt Augustin, Germany;2. University of Wuppertal, Gausstrasse 20, 42119 Wuppertal, Germany;1. Japan National Institute of Occupational Safety and Health, 1-4-6 Umezono, Kiyose, Tokyo 204-0024, Japan;2. Konkuk University, 120 Neungdong-ro, Gwangin-gu, Seoul 143-701, Republic of Korea;3. Technology Institution of Industrial Safety, 2-16-26 Hirosedai, Sayama-shi, Saitama 350-1328, Japan;1. Politecnico di Torino, Dept. of Applied Science and Technology, C.so Duca degli Abruzzi 24, 10129 Torino, Italy;2. Alchim sas, Via Roma 23, 10023 Chieri, TO, Italy |
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| Abstract: | The safety characteristics pmax and KSt of a flammable dust are usually determined in a closed apparatus (20 l- or 1 m3-vessel). The results are strongly influenced by the parameters of the apparatus (e.g. the volume, geometry, dispersion system). The aim of this project is to investigate whether there is a correlation between pmax and KSt on the one hand and the calorific value HS and the specific surface area Sm of the dust on the other. In an experimental study, around 200 dust samples from different sectors of industry will be analysed. The analysis of around 102 dusts shows that the correlation may be described by a logarithmic function. Owing to differences in reaction mechanism it is reasonable to formulate different functions for different substance groups (e.g. metals, organic materials). This may lead to an algorithm which can predict pmax and KSt from HS and Sm within a defined range of error. |
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| Keywords: | Dust explosion Safety characteristic Particle size Calorific value BET-surface |
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