Experimental Research on Suppressing Gas Explosion by Mg(OH)₂/CO₂

Using the self-improved 20 L spherical explosion suppression experimental system, gas explosion suppression experiments on Mg(OH)₂ and CO₂ and both of them were studied. The results indicates that Mg(OH)₂ and CO₂ can suppress gas explosion. Adding Mg(OH)₂ which the concentration is 250 mg/L and CO₂ which the concentration is 8%, the time of the maximum explosion pressure prolongs more than three times, and the maximum explosion pressure and the maximum pressure rise rate decreased by 45.6% and 79.9%, when methane concentration is 11%. The explosion suppression effect of mixing Mg(OH)₂ and CO₂ is weak, compared with the effect which is added by Mg(OH)₂'s and CO₂'s.