Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Investigation of coal properties and airborne respirable dust generation.

Authors
Organiscak-JA; Page-SJ
Source
NIOSH 1998 Oct; :1-16
NIOSHTIC No.
20000281
Abstract
Laboratory crushing experiments were conducted on a range of low- to high-volatile bituminous coals to investigate the various factors influencing airborne respirable dust (ARD) generation. This research was conducted to identify the principles of ARD liberation form the coal product. Five U.S. bituminous coals were uniformly prepared and processed through a double roll crusher located in a low-velocity wind tunnel. Experimental factors studies included inherent coal seam constituents, coal grindability, specific energy of crushing, product size characteristics, dust cloud electrostatic field, and specific ARD generated. The results of this investigation indicate that a combination of several factors are associated with ARD generation. One factor is the effect of coal rank, described by the inherent moist fuel ratio, on the product size characteristics, defined by Schuhmann size function parameters. Another key factor is the effect of air dry loss (ADL) moisture in the coal seam on the breakage-induced electrostatic field of airborne dust. the effect of these factors is that different percentages of <10-micrometer coal particles are dispersed as ARD. A discussion of electrostatic field principles, coal ADL, and its effect on ARD generation is presented.
Keywords
Coal-mining; Mining-industry; Respirable-dust; Dusts; Sampling; Laboratories; Air-sampling; Air-flow; Data-processing
Publication Date
19981001
Document Type
Numbered Publication; Report of Investigations
Fiscal Year
1999
NTIS Accession No.
PB99-123101
NTIS Price
A03
Identifying No.
(NIOSH) 98-160; RI-9645
ISSN
1066-5552
NIOSH Division
PRL
Source Name
National Institute for Occupational Safety and Health
State
WV; PA
TOP