Effects of methane admixture, particle size and volatile content on the dolomite inerting requirements of coal dust

Solid inertants and their use in dust explosion prevention and mitigation

“…With respect to mixtures of fuel dust and inertant, the copresence of a flammable gas leads to an increase in the inerting level. This again is well-established (Amyotte et al, 1995(Amyotte et al, , 1991a.…”

“…This trend is analogous to that in Fig. 3, which shows the reduction in rate of pressure rise brought about by the admixture of dolomite to a typical coal dust from a Nova Scotia mine (Amyotte et al, 1991a). Petroleum coke, although obviously not totally inert, does have a significantly lower volatile content than the coals, and therefore, exerts an 'inerting-like' influence when mixed as a fuel with coal dust.…”

“…For example, in a series of 26-L tests conducted by Amyotte et al (1991a), the inerting level for one of the coal dusts examined was raised from 84 wt% dolomite to 89 wt% dolomite by the addition of 2 vol% methane to the oxidizing atmosphere. While the dolomite percentage increase is only 6% of its value when no methane is present (i.e.…”

“…2 and 3 from Amyotte, Basu, and and Amyotte, Mintz, Pegg, Sun, and Wilkie (1991a), respectively, show another example, where knowledge of the behaviour of thermal inertants can be helpful in interpreting the results from an application other than explosion inerting. In the study by Amyotte et al (2003), the primary objective was to determine the degree of reduction in the dust explosion hazard that would be afforded by the substitution (wholly or partially) of petroleum coke for coal in the burner feed in fossil fuel-fired power plants.…”

Dust explosions–Cases, causes, consequences, and control

“…Hybrid mixtures of polyurethane-cyclopentane and plastic dust-cyclopentane were two times more sensitive to dust explosion than the dust without the cyclopentane gas [40]. For mixture of hydrocarbon dusts and gases, the mixing law of Le Chatelier is applicable [7,118,119].…”