Cement Manufacturers Association (CMA)

Explosive combustion can run into the separator both from below, if an explosion above, if an explosion had been ignited in the DC. An initial explosion can also be ignited inside the separator The other way around there is the connection between the separator and Without the mitigating diversion of the described above (under VRM-to-DC or ), propagation toward the separator could lead to a violent secondary explosion in the separator’s volume. Should this happen, the secondary explosion would be an explosion under what is called the separator from below it is already compressing the air in the system ahead of piling source and the pressure that develops during an explosion under the condition elevated initial pressure will rise to a value above the value it would normally reach. The combustion then will intensify the way in which combustion in an internal combustion motor can be turbo-charged. turbulence in the separator. All these the separator is smaller than the volume of form the potential for a kind of supercharged secondary explosion in the separator. starts in the DC and runs downward to the separator the same conditions as shape without a high degree of EPSR, the capacity of their explosion venting system to mitigate the explosion pressure will, if correctly designed, ensure a much lower explosion pressure in the DC than the possible maximum explosion pressure have a connection between the separator separator. Necessary are - inlet and the conveyor for the separator’s coarse rejected particles - Explosion isolation between the separator and the conveyor Most conveyors used for the connection U-through screw conveyors. U-through screw conveyors have the disadvantage achieve. U-through screw conveyors also have the transit. This ubiquitous situation harbours the risk that in case of an explosion in the of the U-through screw conveyor. Although the screw conveyor doesn’t transport dust (only coarse particles) the amount of dust that could exit the screw conveyor as the result of damaged or open would become air borne and form an explosive atmosphere in the vicinity of the screw conveyor potentially is available. Page 37