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Experimental investigations of coal dust-inertant mixture explosion behaviors

机译：煤粉尘埃式混合物爆炸行为的实验研究

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An experimental investigation was carried out on coal dust-inertant mixture explosions. Tests of explosion severity and flammability limit were conducted by using the Siwek 20 L vessel and influences of ignition energy, coal dust calorific value, coal dust concentration and inertant composition were taken into account. The increase of inerting results with ignition energy is followed by an approximate stabilization when ignition energy exceeds 5 kJ. The ignition energy region of 5-10 kJ is appropriate for inerting testing, whereas ignitors with energy lower than 5 kJ produce unrealistic inerting results. The inerting effectiveness of inertant increases with the reduction of coal dust calorific value. Coal dust concentrations near the stoichiometric concentration require the greatest amount of inertant to suppress explosions. As the coal dust concentration increases beyond the stoichiometric, the amount of inertant requirement is reduced. Due to the efficient decomposition and particular flame extinguishing mechanism, mono-ammonium phosphate represents more excellent inerting effectiveness than calcium carbonate.
机译：在煤粉型混合混合物爆炸上进行了实验研究。通过使用Siwek 20 L血管进行爆炸严重程度和可燃性极限的测试，并考虑了点火能量，粉尘热值，煤尘浓度和偶尔组合物的影响。当点火能量超过5kJ时，带点火能量的惰性结果的增加随后是近似稳定性。点火能量区域为5-10 kJ适合惰性测试，而具有低于5kJ的能量的点火器产生不切实际的惰性结果。随着煤尘热值的减少，惰性的惰性效果增加。在化学计量浓度附近的煤尘浓度需要最大的惰性剂来抑制爆炸。随着煤尘浓度的增加，超越化学计量，惰性要求的量减少。由于有效的分解和特定的火焰灭火机理，磷酸单铵代表比碳酸钙更优异的惰性效果。

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