Observations of microscopic characteristics of post-explosion coal dust samples |
| |
| Institution: | 1. Key Laboratory of Coal Methane and Fire Control, Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China;2. School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;2. Process Safety Consultant, Cincinnati, OH, USA;1. School of Chemical Machinery, Dalian University of Technology, Dalian, 116024, China;2. School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China;3. Institute of Fluid Science, Tohoku University, Sendai, Miyagi, 980-8577, Japan;1. LIMA, Chemistry Institute, University of Brasília—UnB, P.O. Box 04478, 70904-970 Brasília, Brazil;2. National Institute of Criminalistics, Brazilian Federal Police, SAIS Quadra 07 Lote 23, 70610-200 Brasília, Brazil;3. PGMTR—CCEN, Federal University of Pernambuco—UFPE, Av. Prof. Luiz Freire, S/N, Cidade Universitária, 5070-540 Recife, Brazil;1. KU Leuven, Department of Mechanical Engineering, Celestijnenlaan300A, B3001 Leuven, Belgium;2. Adinex NV, Brouwerijstraat 5/3, B 2200 Herentals, Belgium |
| |
| Abstract: | To reveal the microscopic characteristics of the post-explosion coal dust samples, coal dust explosion tests were performed in a 20 L spherical vessel. The explosion characteristic parameters, such as the maximum pressure (Pmax), the maximum rate of pressure rise ((dP/dt)max), ignition time (t) and the deflagration index (KSt) were recorded. Meanwhile, the post-explosion dust samples were collected and analyzed. The research efforts include particle size distribution analysis, SEM analysis and FTIR analysis of dust samples before and after the explosion. The particle size range of post-explosion dust samples became wider according to the mass percent analysis. The microscopic appearance of samples in same particle size range showed some similarity. The porous structure of dust samples was observed by improving the SEM magnification. The chemical structure of dust samples before and after explosion was analyzed by FTIR. |
| |
| Keywords: | Coal dust explosion Particle size distribution Microstructure Chemical structure |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
