The influence of melt composition,liquidus temperature and solidus temperature on vapour explosions in melt droplet impingement experiments |
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| Institution: | 1. Department of Materials, Textiles and Chemical Engineering, Ghent University Technologiepark 46, B9052, Ghent, Belgium;2. Umicore R&D, B2250, Olen, Belgium;1. Department of Materials Science and Engineering, Ghent University, Technologiepark 903, B-9052 Zwijnaarde, Ghent, Belgium;2. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 (box 2450), B-3001 Heverlee, Leuven, Belgium;1. Department of Materials Science and Engineering, Ghent University, Technologiepark 903, B-9052 Zwijnaarde (Ghent), Belgium;2. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 (Box 2450), B-3001 Heverlee (Leuven), Belgium;1. Faculty of Safety Engineering and Civil Protection, The Main School of Fire Service, Slowackiego 52/54, 01-629, Warsaw, Poland;2. Faculty of Safety Engineering, VSB-Technical University of Ostrava, Lumírova 630/13, 700 30, Ostrava, Czech Republic;1. Department of Chemical, Materials & Production Engineering, University of Naples Federico II, Naples, Italy;2. CNR, Institute of Sciences and Technologies for Sustainable Energy and Mobility (STEMS), Naples, Italy;1. School of Safety Science and Engineering, Xi''an University of Science and Technology, Xi''an Shaanxi 710054, China;2. Postdoctoral Research Mobile Station in Mining Engineering, Xi''an University of Science and Technology, Xi''an, Shaanxi 710054, China;3. Postdoctoral Program, Xi’ an University of Science and Technology, 58, Yanta Mid. Rd., Xi’ an, Shaanxi 710054, China;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, China;2. School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907-2088, USA;3. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China |
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| Abstract: | For the investigation of vapour explosions, droplet impingement experiments were performed with the binary system Pb–Sn and the pseudo-binary system PbS–Cu2S. The experiments were performed with a melt at 600 °C (Pb–Sn) or 700 °C (PbS–Cu2S) and a water bath at ambient temperature and pressure. A hydrophone and a high-speed camera were used to study the interaction and from this data, the explosion probability and intensity were determined.The explosion probability had a single minimum around 70 wt% Sn, close to the eutectic composition. Moreover, the explosion probability increased approximately linearly with changing composition towards the pure melts, and was similar for pure tin and pure lead. On the other hand, the explosion intensity was comparable for tin and the eutectic alloy while clearly lower for lead. Almost all intermediate alloys had a reduced explosion intensity.Based on the variation in composition, the effects of the liquidus or solidus temperature and the liquidus-solidus gap on the explosion behaviour were also investigated. The explosion probability in both systems increased with increasing liquidus temperature. Also, the maximum explosion intensity in the Pb–Sn system increased with increasing liquidus temperature. Both could be related to easier triggering due to (partial) solidification. On the other hand, the explosion intensity was found to decrease with increasing gap between liquidus and solidus temperature, as was also found in literature. No significant trends for the explosion intensity were found for experiments with PbS–Cu2S. |
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| Keywords: | Vapour explosion Melt droplet impingement Liquidus temperature Solidus temperature Composition (Pseudo-)binary system |
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