NIOSHTIC-2 Publications Search
Nucleation properties of respirable coal dust (terminal progress report).
Schowengerdt FD Jr.
Physics Department, Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado 1979:43 pages
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.
NIOSH-Grant; Pulmonary-system-disorders; Dust-control; Air-quality-control; Measurement-instrumentation; Measurement-methods; Dust-control-equipment; Coal-mining; Miners
Physics Colorado School of Mines Department of Engr Physics Golden, Colo 80401
Final Grant Report
Physics Department, Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado
Colorado School of Mines, Golden, Colorado
Page last reviewed: January 28, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division