Aerosols and wind generated by hand grinders: experimental.
Am Ind Hyg Assoc J 1987 Jan; 48(1):15-22
The development and initial use of a method of evaluating particle concentrations and air velocities generated by hand grinders were described. The concentrations of particles of various size and air velocity were measured while grinding iron castings with an angle grinder with a disc wheel. An optical particle counter was used to provide a quantitative indication of particle emission paths and relative concentrations. Air velocity and particle concentration maps were developed. There was turbulence immediately downstream of the work, and part of the airstream was deflected, resulting in an outward perturbation of the airflow downstream of the work. It was found that the motor cooling airflow was vented in the general direction of the work and interacted with the airflow generated by the wheel, thus making the control of airborne particle emissions more difficult. Results indicated that the grinder cooling airflow should be redirected so that it does not combine with the particle laden air generated in the grinding process. The author concludes that the optical particle counter used in this study is useful in assessing the effectiveness of emission controls.
NIOSH-Author; Aerosols; Air-flow; Airborne-particles; Protective-equipment; Particle-counters; Optical-analysis; Occupational-exposure; Foundry-workers
American Industrial Hygiene Association Journal