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To study the effect of inert powder on the deflagration of oil shale dust, the Hartmann tube experiment device and 20 L spherical explosion experiment device were used. The effects of three kinds of inert powder (KH2PO4, NaHCO3, Al(OH)3) and widely used rock powder (CaCO3) on the deflagration of oil shale dust in different proportions were studied. The results show that the four inert powders can...