Location
Rolla, Missouri
Session Dates
11 Jun 1999 - 17 Jun 1999
Abstract
A new type of respirable dust sampler was developed and compared side by side to personal gravimetric samplers in the laboratory. The new sampler correlates filter back pressure with mass accumulation to provide mid-shift and end-of-shift determinations of cumulative exposure. The sampler uses a small low flow rate pump to draw dust through a small detector tube that contains a porous urethane foam respirable classification section and glass fiber filter that collects respirable dust. Six different coal dusts were aerosolized in a laboratory dust chamber and a total of 118 triplicate observations were obtained. For individual coal types, the correlation coefficients were between 0.87 and 0.97. The precision of the two methods was similar with the percent relative standard deviation of the personal samplers of 11.83% and the new detector method of 13.96%. For all coal types tested the data were best described by a power function where ΔP = 1.43mass0.85, with a correlation coefficient of 0.73. Assessment of the method under field conditions is currently in progress.
Department(s)
Mining Engineering
Meeting Name
8th U.S. Mine Ventilation Symposium
Publisher
University of Missouri--Rolla
Document Version
Final Version
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Volkwein, Jon C.; Schoeneman, April L.; and Page, Steven J., "Laboratory Evaluation of Pressure Differential Based Respirable Dust Detector Tube" (1999). U.S. Mine Ventilation Symposium. 5.
https://scholarsmine.mst.edu/usmvs/8usmvs/8usmvs-theme7/5
Laboratory Evaluation of Pressure Differential Based Respirable Dust Detector Tube
Rolla, Missouri
A new type of respirable dust sampler was developed and compared side by side to personal gravimetric samplers in the laboratory. The new sampler correlates filter back pressure with mass accumulation to provide mid-shift and end-of-shift determinations of cumulative exposure. The sampler uses a small low flow rate pump to draw dust through a small detector tube that contains a porous urethane foam respirable classification section and glass fiber filter that collects respirable dust. Six different coal dusts were aerosolized in a laboratory dust chamber and a total of 118 triplicate observations were obtained. For individual coal types, the correlation coefficients were between 0.87 and 0.97. The precision of the two methods was similar with the percent relative standard deviation of the personal samplers of 11.83% and the new detector method of 13.96%. For all coal types tested the data were best described by a power function where ΔP = 1.43mass0.85, with a correlation coefficient of 0.73. Assessment of the method under field conditions is currently in progress.
