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[...] The CDEM also considers dust particle sizes in its measurements. The finer the coal dust, the more explosible it is. The CDEM is a major improvement over the current method in that the current laboratory method cannot distinguish dust particle size and thus does not measure explosion potential. The CDEM evaluates particle size and indicates if more rock dust is needed to inert the finer-sized coal dust particles. [...]
FIELD EVALUATION OF THE COAL DUST EXPLOSIBILITY METER: