Location

Rolla, MO

Session Start Date

6-11-1999

Session End Date

6-17-1999

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 and Nuclear Engineering

Appears In

U.S. Mine Ventilation Symposium

Meeting Name

8th U.S. Mine Ventilation Symposium

Publisher

University of Missouri--Rolla

Publication Date

6-11-1999

Document Version

Final Version

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 11th, 12:00 AM Jun 17th, 12:00 AM

Laboratory Evaluation of Pressure Differential Based Respirable Dust Detector Tube

Rolla, MO

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.