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Dynamic Particle Size Measurement of Coal Dust.

Marple-VA; Rubow-KL

NTIS: PB 285 096 Available for Reference At Bureau Libraries :155 pages

10000065

This research evaluated methods and techniques by which the size distribution and concentration of mining-related dusts could be measured. One result was the development of a portable, battery- operated, optical particle counter-multichannel analyzer system that could be used to determine the size distribution and concentration of mining aerosols. A calibration technique was developed that relates the output of the optical particle counter to the penetration of the particles through an impactor. This results in a calibration curve in terms of the aerodynamic or stokes' diameter of the aerosol particles. Another aspect was the calibration and evaluation of respirable dust monitors. The results of the evaluation showed that the instruments were within +/-25 pct of the true mass concentration up to about 15 mg/m, if the dust particles were in a size range from about 0.7 to 10 um aerodynamic diameter.

19770101

CP; Final Contract Report;

1977

PB-285096

A09

OFR 93-78

TCRC;

NTIS: PB 285 096 Available for Reference At Bureau Libraries

MN;

University of Minnesota