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Airborne dust liberation during coal crushing.

Authors
Organiscak-JA; Page-SJ
Source
Coal Prep 2001 Jun; 21:423-453
NIOSHTIC No.
20021825
Abstract
Airborne dust generation is one of the byproducts of coal mining, processing, and handling. The amount of airborne total dust (ATD, respirable size and larger) and airborne respirable dust (ARD) generated is of primary interest for designing the level of engineering controls needed for adequate dust abatement. Laboratory crushing experiments were conducted in a wind tunnel with a roll crusher to identify relationships among crushing parameters, product size, coal rank properties, and airborne dust generation. Through the first series of experiments, the effect of primary and secondary breakage processes on both product size and airborne dust generation was examined. Through a second series of experiments, the effect of coal rank properties on product size and airborne dust generation was studied using a uniform crushing process with secondary breakage. Laboratory results indicate that secondary breakage of a particular coal notably increases the specific amount of ATD generated, while negligibly impacting the specific amounts of ARD generated. A strong positive relationship was identified between the specific amounts of ATD and ARD generated during the primary breakage process (with minimal secondary breakage), but a negligible relationship was observed between the same two variables when secondary breakage was introduced into the crushing process. This indicates that most of the ATD and ARD is generated from the primary breakage, while secondary breakage has more of an influence on generating additional amounts of larger sized ATD.
Keywords
Airborne-dusts; Airborne-particles; Coal-dust; Coal-miners; Coal-mining; Respirable-dust; Control-technology; Miners; Mine-workers; Mining-industry; Dusts; Dust-particles
Contact
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Pittsburgh, PA 15236
CODEN
COAPDY
Publication Date
20010601
Document Type
Journal Article
Email Address
jdo3@cdc.gov
Fiscal Year
2001
NTIS Accession No.
NTIS Price
ISSN
0734-9343
NIOSH Division
PRL
Priority Area
Work Environment And Workforce; Control Technology & Personal Protective Equipment
Source Name
Coal Preparation
State
PA
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