Authors: V.A. Portola

Title of the article: Evaluation concentration limits explosive coal dust

Year: 2016, Issue: 5, Pages: 16-21

Branch of knowledge: Earth sciences

Index UDK: 622.814

DOI: -

Abstract: The formulas for calculating upper and lower limits of concentration of coal dust explosiveness depending on the output of volatiles. It is shown that the calculated and experimental values ​​of the former lower concentration limit of explosiveness of coal dust coincide-by, if volatile components exiting do not fill the entire volume of airborne dust, and dust forming around the local area. It is proposed to take into account also the evolution of carbon monoxide by the oxidation of the non-volatile carbon. Thermal radiation from the burning particles stirs neighboring particles, resulting in the release of volatiles and fire. When calculating the upper concentration limit of explosiveness of coal dust is considered incomplete release of volatile components of the coal particles due to warming only the top layer of particles and release of hydrogen, carbon monoxide, raising the upper explosion limit of the gas mixture.

Key words: coal dust explosion concentration limits of explosiveness of coal dust volatile components a mixture of combustible gases

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