Laboratory investigation of the dust explosibility characteristics of three Nova Scotia coals

Solid inertants and their use in dust explosion prevention and mitigation

“…Similar to the effects of particle size, the influence of the co-presence of a flammable gas on the explosibility parameters of a fuel dust alone is wellestablished (Amyotte et al, 1991b;Cashdollar, 2000). With respect to mixtures of fuel dust and inertant, the copresence of a flammable gas leads to an increase in the inerting level.…”

“…The effects of a reduction in explosible dust particle size are numerous and are well-established; these include, for example, an increase in the maximum explosion pressure-P max , a potentially significant increase in the maximum rate of pressure rise-(dP/dt) max , and a lowering of the minimum explosible concentration-MEC (Amyotte, Mintz, Pegg, Sun, & Wilkie, 1991b;Cashdollar, 2000).…”

“…Decreasing the mass mean diameter of an explosible dust by reducing particle size throughout the entire size distribution can also significantly increase the inerting level (Amyotte et al, 1991b). With respect to inertant particle size, a general statement can be made that finer sizes of a given inertant are more effective at explosion inerting and suppression than coarser size fractions.…”

Numerical investigation of explosion suppression by inert particles in straight ducts

“…Another conclusion is that the suppression is more effective when the particle bulk density is increased. Previous works dealing with this issue are, for instance: [15,16].…”

Flame propagation in hybrid mixture of coal dust and methane

“…Others concentrate on the design of new explosion protection equipments or methods (Chuyanov & Topilski, 2006;Dastidar, Amyotte, & Pegg, 1997;Dastidar, Amyotte, Going, & Chatrathi, 2001;Reddy, Amyotte, & Pegg, 1998). Amyotte, Mintz, Pegg, and Sun (1993) and Amyotte, Mintz, Pegg, Sun, and Wilkie (1991) also stated that the explosion parameters (maximum explosion pressure, P max , and the maximum rate of pressure rise, (dP/dt) max ) of the hybrid mixture of coal dust and methane are found to increase, the effect of which is most significant at lower dust concentrations. However, their studies on the hybrid mixture of coal dust and methane are restricted in the stage of ignition and deflagration.…”