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Nucleation properties of respirable coal dust (terminal progress report).

Authors
Schowengerdt-FD Jr.
Source
Physics Department, Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado 1979:43 pages
Link
NIOSHTIC No.
00091841
Abstract
Dust control techniques in coal mines were investigated to perfect methods of generating monodisperse coal dust, develop methods for directly measuring supersaturation, make improvements in light scattering instrumentation, conduct experiments to evaluate competition for moisture, and measure the nucleation efficiency of different coals. Aerosol classification methods were based on electric mobility and used a parallel plate electrostatic classifier that provided direct access to the classified aerosol of both charge polarities. Performance tests included calibration with monodisperse latex spheres and determination of the resolution using both mono and polydisperse coal dust and measurements of the equilibrium charge distribution on latex spheres. A Climet 208 particle counter was used and found reliable for particle size measurements. Latex sphere and coal dust nucleation efficiencies were measured using the same method. The authors conclude that, with the exception of supersaturation instrument and moisture competition experiments, all study objectives were met. Specific questions concerning wettability of coal, nucleation time, collectable size growth time, and nucleation efficiency were answered satisfactorily and the results supported the feasibility of the technology. The authors recommend the development of a prototype control system.
Keywords
NIOSH-Grant; Pulmonary-system-disorders; Dust-control; Air-quality-control; Measurement-instrumentation; Measurement-methods; Dust-control-equipment; Coal-mining; Miners
Contact
Physics Colorado School of Mines Department of Engr Physics Golden, Colo 80401
Publication Date
19790101
Document Type
Final Grant Report
Funding Amount
232996
Funding Type
Grant
Fiscal Year
1979
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-00565
NIOSH Division
OEP
Priority Area
Pulmonary-system-disorders
Source Name
Physics Department, Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado
State
CO
Performing Organization
Colorado School of Mines, Golden, Colorado
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