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Primary Gas Toxicities and Smoke Particle Characteristics During Combustion of Mine Ventilation Ducts: Development of a Test Parameter.
MISSING :11 pages
The U.S. Bureau of Mines performed experiments to determine if the primary gas toxicities evolved during the early (approximately 300 deg c) and later (> or = to 400 deg c) combustion stages of chlorinated polyester-reinforced mine ventilation ducts could be predicted by a smoke particle characteristic, for the development of a test parameter. The experiments were conducted in an approximately 20-l furnace, at 14-min durations at set furnace temperatures of 250 deg and 1,000 deg c, with an airflow through the furnace of 10 l/min. The variables studied, as a function of time, were the hydrogen chloride (hcl), carbon monoxide (co), carbon dioxide (co2) and oxygen (o2) concentrations, furnace temperatures, the sample mass weight loss, the average smoke particle diameter (dg) and average number and concentration (no), and the product of the average smoke particle diameter and concentration (dgno). Results show that the inverse of the smoke particle diameter- concentration product (l/dgno) correlates directly and significantly with the primary gas toxicities evolved during both early (hcl) and later (co) stages of combustion.
IH; Report of Investigations;
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division