COAL DUST DISPERSE COMPOSITION EFFECT ON THE EXPLOSIVITY RISKS
Journal Title: Вестник научного центра по безопасности работ в угольной промышленности - Year 2019, Vol 0, Issue 2
Abstract
The article discusses the results of experimental studies of coal dust dispersed composition effect on explosive hazard indicators: the value of flame propagation lower concentration limit (NKPR or NPV), the maximum explosion pressure and the pressure rise rate. A series of tests results in a 20-liter blast chamber are shown. Using the example of DG energy coal with a yield of volatile substances of 37.3%, an increase in the maximum explosion pressure by 23-40% and an increase in the rate of pressure build-up by almost 10 times with a decrease in the maximum particle size from 212 to 25 μm are considered. At the same time, the dynamics of the lower concentration limit of flame propagation with a change in the dispersed composition of coal dust was investigated. The practical aspects of the dispersion composition influence on coal dust explosiveness degree in full-scale explosive experiments are considered.
Authors and Affiliations
S. B. Romanchenko, M. O. Devlikanov
Keywords
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